2023-12-16 — ... 1500 or 1200 volts. $50.00. Kilowatt Class. B modulator, $50,00, All ... Manual on Recvr-Trans. RT46/TRC10 with PE-. 214B. Original. ISO pages ...
PUBLISHED BY DIE AMERICAN RADIO RELAY LEAGUE.
Linear Sti
THE ULTIMATE IN QUALITY
UTC Linear Standard Audio Transformers represent the closest approach to the ideal component from the stand point of uniform frequency response, low wave form dis tortion, high efficiency, thorough shielding and utmost de pendability. UTC Linear Standard Units offer these features:
True Hum Balancing Coil Structure . . . maxi
mum neutralization of stray fields.
Balanced Variable Impedance Line . . . per mits highest fidelity on every tap of a universal unit ... no line reflections or transverse coupling.
Reversible Mounting . . . permits above chassis or sub-chassis wiring.
Alloy Shields . . . maximum shielding from in
ductive pickup. Hiperm-Alloy ... a stable, high permeability nickel-iron core material.
'jSffgihl' Semi-Toroidal Multiple Coil Structure . . .
minimum distributed capacity and leakage re< actance.
Precision Winding . . . accuracy of winding -1%, perfect balance of inductance and capacity;
exact impedance reflection.
High Fidelity . . - UTC Linear Standard Trans
formers are the only audio units with a guaran teed uniform response of 1 DB from 20-20,000
cycles.
TYPICAL LS LOW LEVEL TRANSFORMERS
Type No.
LS-IO
LS-IOX LS-12
LS-I2X
LS-26 LS-19
LS-21
LS-22
LS-30
LS-30X LS-27 LS-50 LS-51 LS-I4I
Application
Low impedance mike, pickup, or multiple line to grid As Above
Low impedance mike, pickup, or multiple line tn push pull grids As above
Bridging line to single or push pull grids Single plate to push pull grids like 2A3. 6L6. 300A. Split secondary
Single plate to push pull grids. Split primary and secondary Push pull plates tn push pull grids. Split primary and secondary Mixing, low impedance mike, pickup, or multi ple line to multiple line
As above
Single plate to multiple line Single plate to multiple line
Push pull low level plates to multiple line Three sets of balanced windings far hybrid ser vice. centertapped
Primary Impedance
Secondary Impedance
50, 125. 200. 250. 333, 500/ Bui) ohms
60,000 ohms in two sections
As above
50.000 ohms
50. 125. 200. 250, 333, 500/ tïÜO ohms
120.000 ohms overall, in two sections
As above
80,000 ohms overall, in two sections
5.000 ohms
60.000 ohms in two sections
16,000 ohms
95,000 ohins; 1.25:1 each side
±1 db from
20-20,000
20-20,000 20-20,000
20-20.000
15-20.000 20-20,000
15.000 ohms
135,000 ohms; turn ratio 3:1 overall
20-20,000
30,000 ohms plate to plate
80.000 ohms; turn ratio 1,6:1 overall
20-20.000
50. 125. 200, 50. 125, 200, 250. 250. 333. 500/ 333, 500/600 ohms 600 ohms
20-20.000
As above
As above
20-20.000
15.000 ohms
50. 125. 200. 250, 30-12,000 333. 500/600 ohms cycles
15.000 ohms
50. 125. 200. 250, 20-20,000 333. 500/600 ohms
30.000 ohms 50. 125. 200. 250, 20-20,000 plate to plate 333, 500/600 ohms
500/600 ohms 500/600 ohms
30-12.000
Relative Max. hum- Unbal
Max. pickup anced DC Level reduction in prim'y
+ 15 DB -- 74DB 5 MA
+ 14 DB --O2 DB + 15 DB --74 DB
5 MA 5 MA
+ 14 DB -+2DB 5 MA
+ 20 DB --74 DB 0 MA + 17 DB --50 DB 0 MA
+ 14 DB --74 DB 0 MA
+ 26 DB --50 DB .25 MA
+ 17 DB --74 DB 5 MA
+ 15 DB --92 DB + 20 DB --74 DB
3 MA 8 MA
+ 17 DB --74 DB 0 MA
+20 DB --74 DB 1 MA
+ 10 DR --74 DB 0 MA
List Price $25.00
32.00 28.00
35.00
25.00 24.00
24.00
31.00
25.00
32.00 24.00 24.00 24.00 28.00
___
HUHNUrMF
Write for our Catalog PS-408
150 VARICK STREET
NEW YORK 13
EXPORT DIVISION: 13 EAST 40th STREET. NEW YORK 16. N. Y.,
CABLES: "ARLAB"
Four GL-811-A's, putting out 620 w
BH|i
(zero-bias), cost but slightly more
than one 50-watter!
GL-811-A POWER TRIODE
Filament voltage Filament current
Amplification factor
Typical operating conditions (ICAS), Class B a-f power amplifier and modulator:
2 tubes
d-c plate voltage d-c grid voltage max signal driving power (approx) max signal power output (approx)
1,250 v 0 v
6.0 w
310 w
6.3 v 4 amp
160
4 tubes 1,250 v
0 v 12.0- w 620 w
ecidedly a "best buy", the new GL-811-A! Whether
D you're running high power or low, the cost advantage is
substantial. Two tubes will give you enough audio (340 w max) for a moderate-power transmitter, and should you own-- or whenever you complete--that dream kilowatt rig, a second pair in p-p parallel will double your modulator output.
As a smart ham, wise in the ways of circuits, you may wish to reap the benefits of zero-bias operation. They're important benefits. First, modulator distortion is all but eliminated. Second, no C batteries or voltage-regulated bias pack are needed . . . chalk up another economy! Zero-bias, you won't g&quite so high an audio output (310 w for two tubes instead of 340 w), but the small loss is outweighed by the advantages.
Adding two more GL-811-A's to your original pair--if you climb from moderate to high power--calls for no tube replace ments, consequently no wastage. And you then will have a modulator powerful enough for any legal rig. A further pro tection to your investment is the up-to-the-minute design of the GL-811-A: its new and stronger construction, superior highvoltage insulation, improved plate structure with radiating fins.
See this fine new tube today--learn its low price--from your G-E tube distributor! Or write Electronics Department, General
Electric Company, Schenectady 5, New York.
Series 7 in a listing, by areas, of tube
distributors who can supply you with
Ham News, G.E.'s bi-monthly magazine:
Ann Arbor, Mich.: Wedemeyer Electric Supply Co. Champaign, III.: Radio Doctors. Chicago, III.: Allied Radio Corp.; J. G. Bowman
and Co.: Concord Radio; R. Cooper Jr., Inc.; Green Mill Radio Supply; Lukko Sales Corp.; Newark Electric Co. Des Moines, la.; Radio Trade Supply. Detroit, Mich.: M.. N. Duffy Co.; General Electric Supply Corp.; Radio Electronic Supply; Radio Specialties Co.; Radio Supply and Engineering. Duluth, Minn.: Northwest Radio Co. Flint, Mich.: Lifsey Distributing Co. Grand Rapids, Mich.; Radio Electronic Supply. Jacksen, Mich.: Fulton Radio Supply. Jacksonville, III.: Baptist Radio Laboratories. LaCrosse, Wis.: General Electric Supply Corp. Lansing, Mich.: Wedemeyer Electric Supply Co. Madison, Wis.: Satterfield Radio Supply. Manitowoc, Wis.: Harris Radio Corp. Mason City, la.: Crescent Electric Supply Co. Milwaukee, Wis.: Radio Parts Co., Inc. Minneapolis, Minn.: Northwest Radio and Electric Supply. Muskegon, Mich.: Fitzpatrick Electric Supply Co. Oak Park, Ilk: Melvin Electronics Co. Ottumwa, la.: Radio Trade Supply Co. Peoria, Ilk: R. Cooper Jr., Inc.; Klaus Radio and Electric Supply. Pontiac, Mich.; Electronic Supply Co. Rock Island, Ilk: Tri-City Radio Supply Co. Rockford, III.: General Electric Supply Corp. St. Paul, Minn.: Hall Electric Co. Sioux City, la.; Crescent Electric Co. Springfield. Ilk: Mr. Harold Bruce.
(List as of October 25, 1949)
ELECTRONIC TUBES OF ALL TYPES FOR THE RADIO AMATEUR
GENERAL fi ELECTRIC
100 JAt
1
More dope on 32V accessories
148B-1
148B-1 NB FM Adapter--The new Collins 148B-1 Narrow Band FM Adapter (shown at top) is for use with either the 32V-1 or the 32V-2 transmitter. It plugs into the 70E-8 variable frequency oscillator, and is suitable for FM operation on all bands. Fre quency deviation is adjusted by the audio gain control on the transmitter. A toggle switch selects AM or FM. Available soon at your Collins dealer's. The price is $31.75.
35C-1 Low Pass Filler--A coaxial fitting at the rear of the 32V-2 cabinet permits the use of an RG58/U or RG8/U transmission line in which the new Collins 35C-1 Low Pass Filter may be inserted. The 35C-1 is a 52 ohm three-section filter which, with approximately 0.2 db insertion loss below 29.7 me, provides more than 75 db of attenuation to har monics in the television range as shown in the curve at left. This high attenuation is added to that pro vided in the 32V-2 transmitter. The unbalanced output permits grounding of the outer conductor of the line and the case of the filter. The price of the 35C-1 Filter is $40.
315E Balun Transformer--For best operation, the 35C-1 Filter should feed a properly terminated 52 ohm line. Coupling to a balanced antenna may be accomplished by an antenna tuner or by the new Collins 315E-1 Balun Transformer, which is a wide band, low loss transmission line (diagram below) for coupling from a 52 ohm unbalanced line to a 300 ohm balanced load without tuning controls. It consists of a transmission line connected to transfer from unbalanced to balanced conditions ("balun") and a step-tapered impedance matching line. Over the frequency range 7 to 30 me, a standing wave ratio of less than 2 to 1 is possible. The efficiency of the system is good even beyond the specified limits. The 315E-1 is supplied in kit form with coaxial cables completely made up, and aluminum tubing and spacers fabricated ready to assemble. Available soon at your Collins dealer's. The price is $62.
315E Balun schematic
FOR SUCCESS IN AMATEUR RADIO, IT'S
COLLINS RADIO COMPANY, Cedar Rapids, Iowa
11 W. 42nd Si. NEW YORK 18
2700 West Olive Ave. BURBANK
M & W Tower DALLAS 1
2
Fountain City Bank Bldg. KNOXVILLE
JANUARY 1950
VOLUME XXXIV · NUMBER 1
PUBLISHED, MONTHLY, AS ITS OFFICIAL ORGAN, BY THE AMERICAN RADIO RELAY LEAGUE, INC., AT WEST HARTFORD, CONN., U. S. A.; OFFICIAL ORGAN OF THE INTERNATIONAL AMATEUR RADIO UNION
STAFF
Editorial
A. L. BUDLONG, W1BUD
Editor
HAROLD M. McKEAN, W1CEG
Managing Editor
GEORGE GRAMMER, WIDE
Technical Editor
DONALD H. MIX, WITS BYRON GOODMAN, W1DX
Assistant Technical Editors
EDWARD P. TILTON, W1HDQ
V.H.F. Editor
RICHARD M. SMITH, W1FTX C. VERNON CHAMBERS, W1JEQ
Technical Assistants
ROD NEWKIRK, W9BRD
DX Editor
WALTER E. BRADLEY, W1FWH
Technical Information Service
Production
RALPH T. BEAUDIN, W1BAW
Production Manager
NANCY A. PRICE
Assistant
Advertising
F. CHEYNEY BEEKLEY, WIGS LORENTZ A, MORROW, W1VG
EDGAR D, COLLINS
Circulation
DAVID H, HOUGHTON
Circulation Manager
RALPH T. BEAUDIN, W1BAW
Assistant Circulation Manager
OFFICES
38 La Salle Hoad West Hartford 7, Connecticut
Subscription rate tn United States and Possessions, $4.00 per year, postpaid: $4.50 in the Dominion of Canada, $5,00 in all other countries. Single copies, 40 cents. Foreign remittances should'.be by international postal or express money order or bank draft negotiable in the U. S. and for an equivalent amount in U. 8. funds. Entered as second-class matter May 20, 1919, at the post office at Hartford, Connecticut, under the Act of March 3, 1879. Acceptance for mailing at special rate of postage provided tor in section 1103, Act of October 3, 1917, authorized September 9, 1922. Addi tional entry at ('uncord, N, H,, author ized February 21, 1929, under the Act of February 28, 1925. Copyright 1950 by the American Radio Relay League, Inc. Title registered at U. 8. Patent Office.
INDEXED BY INDUSTRIAL ARTS INDEX
-- CONTENTS --
"It Seems to Us ..."................................................................. 9
Our Cover..................................................................................... IO
A High-Attenuation Filter for Harmonic Suppression A. M. Pichitino, W3NJE 11
Antenna Polarization on 144 Me. Edward P. Tilton, W1HDQ IS
16th ARRL International DX Competition......................... 17
A One-Tube VFO Amplifier Gerald T. White, W3LTR, and L. W. Sieck, W4KMG 20
Feed-Back..................................................................................... 21
Folded Elements in a Reversible Unidirectional Array Bruce Kelley, W2JCE/W2QCP 22
10-Meter WAS Contest............................................................. 25
In QST 25 Years Ago This Month......................................... 25
Chicagoland Ham Mobilers Serve as Communications First-Liners................................................ ........................ 26
Happenings of the Month........................................
28
An RC-Type Audio Signal Generator Richard M. Smith, W1FTX 32
On the Air with Single Sideband............................................. 38
How's DX?..................................................................................... 39
Audio Phase-Shift Networks .George H. Nibbe, W6BES 42
Hints and Kinks ....................................
46
United States Naval Reserve................................................. 47
Debugging the Electronic Bug Richard H. Turrin, W2IMU 48
Answering the Beginner's Question -- "C.W. or 'Phone?" Dallas T. Hurd, W2PFU 50
3rd V.H.F. Sweepstakes, Jan. 21st-22nd F. E. Handy, W1BDI 52
Silent Keys........................................................................................ 53
Surplus Corner -- Plug-In Exciters from "Command" Transmitters .... 54
The World Above 50 Me.......................................................
56
ARRL QSL Bureau........................................................................... 60
Military Amateur Radio System............................................... 60
Correspondence from Members................................
61
Operating News...............................................................
6
Station Activities ...........................................................
7
Ufar»
SMB i
f ' ; ? ( S .¿I
¡Ml set to go places with you --anywhere! Extra sensitivity for weak signal areas . . . extra per formance for good Ham operation.
The newest thing in portables. just introduced by Hallicrafters. One r-f, two i-f stages. Range 540
kc to 31 Me in 4 Bands. 8 tubes plus rectifier. AC, DC, or bat teries.
Long-Wave Version -- S-72L, covers airways range and control towers frequency, omitting high est short-wave band. $89.95.
the hallicrafters co
4401 W. Fifth Ave. · Chicago 24, III. Manufacturers of Precision Radio and Television Equipment
4
of Excellence
PRs are on top! Wherever you go, the world around . . . wherever dependable radio frequency control is essential . . . PR Crystals stand out as the standard by which other crystals are judged. This is no accident. PR stands for superb QUALITY. Nothing is spared to make PRs truly the standard of excellence... and your dealer will tell you the same thing.
10 METERS, Type Z-5, $5.00 · 20 METERS, Type Z-3, $3.75 · 40, 80 & 160 METERS, Type Z-2, $2.75
Hi
W
Since1934
PR USE
AND KNOW WHERE YOU ARE
PETERSEN RADIO COMPANY, INC.
2800 W. BROADWAY . COUNCIL BLUFFS, IOWA
5
Section Communications Managers of the ARRL Communications Department
Reports Invited. All amateurs, especially League members, are invited to report station activities on the lirst of each month (for preceding month) direct to the SCM, the administrative- ARRL official elected by members in each Section. Radio Club reports are also desired by SCMs for inclusion in QST. All ARRL Field Organization appointments are now available to League members. These include ORS, OES, OPS. OO and OBS. Also, where vacancies exist SCMs desire applications for SEC, EC, RM, and PAM. In addition to station and leadership appointments for Members, all amateurs are invited to join the ARRL Emergency Corps (ask for Form 7).
Eastern Pennsylvania Maiyiand-Delaware-D.C. Southern New Jersey Western New York Western Pennsylvania
W3BES W3BV5 T W2ASG W2PGT W3KWL
__ ATLANTIC DIVISION
... ....
Jerry Mathis
623 Crescent Ave.
Eppa W. Darne
132 Tennessee Ave,, N.E,
Dr. Luther M. Mkitarian Harding A, Clark
R5F00DW2arwick
Road
Ernest J. Hlinsky
509 Beechwood Ave.
WGlaesnhsiindgetoGnar2d.eDn.s C. Haddonfield Manlius Farrell
Illinois I*ndiana Wisconsin
W9EVJ W9RE W9RQM
CENTRAL DIVISION.
Lloyd E. Hopkins
27 Lynch St.
W. E. Monigau
1504 East Ewing
Reno W. Goetsch
929 S. 7th Ave.
Elgin South Bend 14 Wausau
North Dakota South Dakota Minnesota
W0GZD W0NGM W0RA
DAKOTA DIVISION ....
___
Paul M. Bossoletti
204 Polk St-
Grand Forks
J. S. Foasberg
509 Idaho Ave., S.E.
Huron
John B. Morgan
1411 Summit Ave.
St. Paul 5
Arkansas Louisiana Mississippi Tennessee
W5I1C W5VT W5DLA W4QT
. DELTA DIVISION
Marshall Riggs
W. J. Wilkinson, jr. Room 313, Jefferson Hotel
J. C. Wallis
2406 Kelly St.
Ward Buhrman
1000 Overlook Ave.
Danville Shreveport Gulfport Chattanooga
Kentucky Michigan Ohio Eastern New York N. Y. C. & Long Island Northern New Jersey
W4CDA W8AQA W8WZ
W2EQD W2OBU W2ANW
GREAT LAKES DIVISION..
W. C. Alcock
155 St. Mildred's Court
Robert B. Cooper
132 Guild St.. N.E.
Dr. Harold E. Stricker 247 W. 5th St.
HUDSON DIVISION
..... . .
Fred Skinner
500 Wolfs Lane
George V. Cooke
88--31 239th St.
Thomas J. Lydon
190 Mortimer
Danville Grand Rapids Marysville
Pelham 65 Bellerose 6, L. I. Rutherford
iowa Kansas Missouri Nebraska
W0PP W0ÍCV W0ICD W0OED
MIDWEST DIVISION
Witham G. Davis
3rd St.
Earl N. Johnston
624 Roosevelt
Ben H. Wendt
RFD 8
Scott E. Davison
433 North Nye Ave.
iMitchellville Topeka North Kansas City Fremont
Connecticut Maine Eastern Massachusetts Western Massachusetts New H*ampshire Rhode Island Vermont
Alaska Idaho Montana ( )regon Washington
WIVB W1VV WIALP W1AZW W1CRW W1CJH W1NLO
KL7IG W7IWU W7EGN W7MQ W7ACF
NEW ENGLAND DIVISION
Walter L. Glover
Glover Ave.
Manley W. Haskell 15 Hemlock St.
Frank L. Baker, jr, 91 Atlantic St.
Prentiss M. Bailey
62 Dexter St.
Clifton R. Wilkinson
Roy B. Fuller
17 Ledge Road
Burt is W. Dean
P, O. Box 81
NORTHWESTERN DIVISION
. _
Charles M. Gray
Box 1237
Alan K. Ross
2105 Irene St.
Fred B. Tintinger
328 Central
J. E. Roden
519 N.W. Ninth
Clifford Cavanaugh Route 1
Newtown Portland North Quincy 71 Pittsfield Salem Depot East Greenwich Burlington Douglas Boise Whitefish Pendleton Auburn
Hawaii Nevada Santa Clara Valley East. Bay San Francisco Sacramento Valley San Joaquin Valley
KH6HJ W7CN W6BPT W6TI W6NL W6ZF W6FKL
PACIFIC DIVISION .. . ....
Dr. Robert Katsuki 1817 Wilhelmina Rise
N, Arthur Sowie
Box 2025
Roy E. Pinkham
1061 Fremont St.
Horace R. Greer
414 Fairmount Ave.
Samuel C Van Liew 215 Knowles Ave.
Ronald G. Martin
2638 13th St.
Ted R. Souza
3515 Home Ave.
Honolulu 17 Reno Santa Clara Oakland 11 Daly City ^a«-ramento 14 Fresno 4
North Carolina South Carolina Virginia West Virginia
Colorado Utah Wyoming
W4CYB W4AZT W4KFC W8J M
W0ÍQZ
W7KFV
ROANOKE DIVISION .......... .
. J. Wortman
c/o Duke Power Co.
Wade H. Holland
P. O. Box 116
Victor C. Clark
Box 73
Donald B. Morris
303 Home St.
ROCKY MOUNTAIN DIVISION
M. W. Mitchell
1959 Uinta St.
(Election in progress)
Marion K. Neary
Box 215
Charlotte 1 Greenville Annandale Fairmont
Denver 7
Laramie
Alabama Eastern Florida Western Florida Georgia West Indies (Cuba-P.R.-V.I.) Canal Zone
W4YE W4FWZ W4ACB W4DXI KP4KD KZ5AW
Los Angeles Arizona San Diego
W61OX W7MLL W6BWO
SOUTHEASTERN DIVISION.
Leland W. Smith
615 Southmont Drive
John W. Hollister
3809 Springfield Blvd.
S. M. Douglas, jr. Clay Griffin Everett Mayer
P.O. Box 3
P1.5O57,
Athens Ave., Box 1061
S.W.
Everett R. Kimmel Box 264
-SOUTHWESTERN DIVISION...... - __ Vincent J. Haggerty 1017 Indio Muerto St.
Gladden C. Elliott Dale S. Bose
39 North Melwood 1 2851 E. California St.
Montgomery Jacksonville Tallahassee Atlanta San J uan o, P. R. Gamboa, C. Z.
Santa Barbara Tucson Santa Ana
Northern Texas Oklahoma Southern Texas New Mexico Maritime (Nfld. & Labr. att.)
.. WEST GULF DIVISION ...
W5CDU
Joe G. Buch
5234 Vickery Boulevard
W5AHT/AST Frank E. Fisher
104 East 11th St.
W5BDI
Ammon O. Young
4803 Eli St.
W5SMA
Lawrence R. Walsh P. O. Box 1663
VEIDQ
MARITIME DIVISION.......
A. M. Crowell
69 Dublin St.
Dallas Pawhuska Houston ? Los Alamos
Halifax, N. S,
Ontario
VE3CP
ONTARIO DIVISION
Thomas Hunter, jr.
1920 Ellrose Ave.
Windsor, Ont.
Quebec
VE2GL
QUEBEC DIVISION
Gordon A. Lynn
R.R. No. 1
Ste. Genevieve de Fterrefonds,P. Q.
Alberta British Columbia V ukon
VE6MT VE7FB VE8AK
VANALTA DIVISION
Sydney T. Jones
P. O. Box 373
Ernest Savage
4553 West 12th Ave.
W. R. Williamson
P. O. Box 534
Edmonton, Alta. Vancouver Whitehorse, Y. T.
Manitoba Saskatchewan
VE4AM VE5DW
__ PRATRTF. DTVTSTON
_____ _
A. W. Morley
26 Lennox Ave.
St. Vital
J. H. Goodridge
c/o Canadian Pacific Air Lines Regina
* Officials appointed to act temporarily in the absence of a regular official.
6
HAM WORLD has been waiting for!?
First announced last summer, then checked and rechecked with the same
painstaking accuracy that a Ham would use on his own gear, this outstanding new re ceiver is at last ready for production.
It's a double superhet, with 2 J 4 kc "nose" selectivity and built-in NBFM reception among its extra features. One r-f, two con version, and 3 i-f stages provide plenty of sensitivity. Of course, it's temperature com pensated and voltage regulated. And the clean-cut station separation is a dream of operating enjoyment.
It isn't a set designed to win praise from music lovers who insist on high fidelity audio. But if you are the Ham who wants performance above all else, here is the set for you.
Naturally, there's no use claiming that this 11-tube (plus rectifier and regulator) set is
the best on the market. For several tubes and a couple of hundred dollars more, we could (and probably will sometime in 1950) build a better Ham set. But of this wc are sure--now or in the future--that, consider ing both performance and price, the SX-71 will be in a class by itself.
During the current month, new SX-71's are starting to appear at .Hallicrafters' distrib utors throughout the country. We'd sug gest you watch for them--and examine one for yourself. Meanwhile, if you want the latest dope, write to us direct and we will be glad to send you a new "spec" sheet.
&
See if at your
hallicrafters'
dealer
the hallicrafters co.-
4401 WEST FIFTH AVENUE · CHICAGO 24, ILLINOIS
7
m the a ;iúrJi?tji -JfciWíTJL Z' Jank iW -
RADIO RELAY
TJu FJu JATX GXJTUTUF , rINuCe.,
is a noncommercial association of radio amateurs, bonded for the promotion of interest in amateur radio communication and experimentation, for the relaying of message» by radio, for the advancement of the radio art and of the public welfare, for the representation of the radio amateur in legislative matters, and for the maintenance of fratemallsm and a high standard of conduct.
It is an incorporated association without capital stock, chartered under the laws of Connecticut. Its affairs are governed by a Board of Directors, elected every two years by the general membership. The officers are elected or appointed by the Directors. The League is noncommercial and no One commercially engaged in the manu facture, sale or rental of radio apparatus is eligible to membership on its board.
'`Of, by and for the amateur," it numbers within its ranks practi cally every worth-while amateur in the nation and has a history of glorious achievement as the standard-bearer in amateur affairs.
Inquiries regarding membership are solicited. A bona fide interest in amateur radio is the only essential qualification; owner ship of a transmitting station and knowledge of the code are not prerequisite, although full voting membership is granted only to licensed amateurs.
All general correspondence should be addressed to the Secretary at the administrative headquarters at West Hartford, Connecticut.
Past P* resident
HIRAM PERCY MAXIM, W1 AW, 1914-1936 EUGENE C. WOODRUFF, W8CMP, 1936-1940
· ··« *
Officers
President. ... . . ..... GEORGE W. BAILEY, W2KH New York, N. Y.
Vice-President. . ... . . . J. LINCOLN MCCARGAR, W6EY Oakland, California
Secretary .......... . . A. L. BUDLONG, W1BUD West Hartford, Connecticut
Communications Manager ... . . FRANCIS E. HANDY, W1BDI West Hartford, Connecticut
Treasurer. . . . . . . . . . . . . .DAVID H. HOUGHTON West Hartford, Connecticut
»,, · *
.. ..
General Counsel. .... . , . , . . . > . PAUL M. SEGAL 816 Connecticut Ave., Washington 6, D. C
Assistant Secretaries . . . . . . JOHN HUNTOON, W1LVQ RICHARD I. BALDWIN, W1 IKE
West Hartford, Connecticut
DIRECTORS
President
GEORGE W. BAILEY........
W2KH
1 East 79th St., New York 21, N. Y.
Vice -Presiden t J. LINCOLN McCARGAR.......... W6EY
66 Hamilton Place, Oakland 12, Calif.
Canadian General Manager
ALEX RETD.................... VE2BE 240 Logan Ave., St. Lambert. P. Q.
Alternate: William W. Butchart........VE6LQ 10740 107 St., Edmonton, Alta.
Atlantic Division
WALTER BRADLEY MARTIN, ...... . W3QV 1033 Arbuta ltd.. Abington, Pa.
Alternate: Henry W. Wickenhiser, jr... W3KWA 1112 State Ave., Coraopolis, Pa.
Central Division
JOHN G. DOYLE........
W9GPI
4331 N. Wildwood Ave., Milwaukee 11, Wis.
Alternate: Wesley E. Marriner.... ... W9AND 624 (`allege Ave., Dixon, HL
Dakota Division
GOODWIN L. DOSLAND......... . W0TSN Moorhead, Minn.
Alternate: Robert A. Kimber......... W0BLK c unyoti Lake Rd.. Rapid City, S. D.
Delta Division
VICTOR CANFIELD... .......... W5BSR
P. <>. Box 965. Lake Charles, La.
Alternate: George S. Acton......... W5BMM
·
Plain Dealing, La.
Great Lakes Division
JOHN H. BRABB........ ..... .. W8SPF 417 Ford Bldg., Detroit 26, Mich.
Alternate: Harold E. Stricker.......... W8WZ 247 W. 5th St., Marysville, Ohio
Hudson Division
JOSEPH M. JOHNSTON.... ..... W2SOX 423 Monmouth Ave., Bradley Beach, N. J.
Alternate: Gay E, Milins, jr.......... W2NJF 170 Broadway, New York 7, N. Y.
Midwest Division
LEONARD COLLETT........ . .. . W0DEA Civil Aeronautics Administration
Box 776, Joplin, Mo.
Alternate: Alvin G. Keyes... .
W0KTQ
1201 Merchants Nat'l Bank Bldg., Cedar Rapids, la.
New England Division
PERCY V. NOBLE. .......... W1BVR 37 Broad St., Westfield, Mass.
Alternate: clayton C, Gordon........ W1HRC 70 Columbia Ave., Providence 5, R. I.
North western Division
R. REX ROBERTS.............. W7CPY 110 W. Brennan St., Glendive. Mont.
Alternate: Allan D. Gunston ........ W7GP 7209 Wright Ave., Seattle 6, Wash.
Pacific Division
EENNEIH E. HUGHES...........W6CTS 810 W. Orange Ave., So. San Francisco, Calif.
Alternate: C. Porter Evans........... W6BF 134 Dracena Ave., Piedmont 11, Cailf.
Roanoke Division J. FRANK KEY............
Box 707. Buena Vista, Va. Alternate:
W4ZA
Rocky Mountain Division FRANKLIN K. MATEJKA..... .... W0DD
P. O. Box 212. Estes Park, Colo. Alternate: William R. White......... W0PDA
1263 Pearl St.. Denver 3, Colo.
Southeastern Division LAMAR HILL................... W4BOL
104 Myrtle, Cochran, Ga. Alternate: William P. Sides. .......... W4AUP
Fleming Road, Montgomery, Ala.
Southwestern Division JOHN R. GRIGGS............... W6KW
3212 Grape St., San Diego 2, Calif. Alternate: John E. Bickel............ W6NY
14820 E. Whittier Blvd., Whittier, Calif.
West Gulf Division WAYLAND M. GROVES........ ...W5NW
P. o. Box 586. Odessa, Texas (W5NW at Humble Pipe Line Camp, Odessa) Alternate: David H, Calk... . W5BHO
7730 Joplin St., Houston 17, Texas
"It Seems to Us..."
WHERE'S THAT 21-MC. BAND?
We've just returned from a trip, principally to affiliated clubs and conventions on the West Coast, speaking on current amateur affairs. Naturally enough, the FCC proposals came in for first attention. Next in line, however, judg ing from the questions we got, was the 21-Mc. band -- when do we get it? Some of the gang who asked about it had seen our editorial on the subject just a year ago and wanted to be brought up to date: others hadn't seen it and simply wanted to get the whole story on what was holding up what many fellows regard as among the most desirable DX frequencies we will have. In practically all cases, it turned out to be advisable to go back and give pretty much the entire background on this matter. All of this leads us to believe we might well tell the story in QST again, and since that was accomplished about as concisely as we know how in the treatment a year ago, we will simply reprint portions of that editorial and then continue on to bring the situation up to date.
One of the first tilings we discovered in our talks is that most fellows thought the Atlantic City regùlations and allocation table are now in effect: Well, they are and they aren't. It is true that the main body of the regulations did be come effective January 1, 1949; so did the al locations table above. Z7V> Me. But not the al location table below 27.5 Me. -- that is still just as it was prior to Atlantic City.
Why? Let's go back to that other editorial:
The answer to that is the extensive na
ture of the changes being made in alloca tions in the region below 27.5 Me. We amateurs may not think Atlantic City changed the allocation table very much; it's another story for the other services! Virtually wholesale changes are, in the works for them, to an extent that amateurs unfamiliar with the details of the alloca tion. table can scarcely appreciate. These complications arise from the inevitable in crease of space for h.f. broadcasting -- because the majority of the nations wanted it -- and the necessity for carving out of
the spectrum sufficient operating fre quencies for what is almost a brand-new service, from the standpoint of the inter national allocations table: aviation. Be tween the two of them, they made it nec essary to find hundreds of kilocycles in the spectrum between 2 and 27.5 Me. Those channels had to come out of a spectrum in which there are no unassigned frequencies.
Well, they came. But what it means to the radio world is the biggest readjustment for other services that the radio world has faced since the Washington conference of
1927 first created assignments on the high frequencies. Entire bands of frequencies heretofore assigned to the maritime-mo bile service have disappeared; not only must the ship stations operating there shift to new frequencies, but the shore sta tions with, which the ships communicated must also shift. Fixed circuits established in. bands now to be assigned to aviation or broadcasting (or now in the 21-Mc. ama teur band) must move. Move, yes -- but where? The Berne list of frequency regis trations has stations assigned on every available channel from top to bottom; more than that, there is usually more than one assignment for the same channel, and any subsequent registrations after the "first" must accept a lower priority, oper ating only if no interference is caused to the earlier registrant or registrants. Some of the circuits that must he shifted, how ever, are in themselves "priority" circuits, whose operation is vital; somehow a way must, be found to continue them in spite of the fact they have no chance of assuring themselves of continuing rights if they move in on presently-registered assign ments.
The radio world, confronted with this apparently insurmountable problem, took the plunge -- it decided to wash out all the old system of registrations under the Berne procedure, to throw the whole thing overboard bag and baggage, and to make a completely new start on an "engineered" allocation of every single one of the existing
fixed and coastal and broadcast and ground stations in the world. They decided to do this by assembling at Geneva, Switzerland, the experts of the world on these circuits and their requirements, armed with circuit-by-circuit lists of their operating requirements and assisted by propagation experts to help them engineer precisely the right frequencies required -- but only those actually required -- for their operation. They would employ to the fullest extent, as indeed they are forced to, such technical expedients as geographical and time sharing of frequencies, low-power relays to permit more operation simultane ously on the same frequency in widelyseparated regions, and such operating ex pedients as multiplexing, forked circuits, etc.
And they decided that when they got the job done, but only when, they would have another administrative conference to approve it, and fix a date when the new table and the new set-up would go into effect.
There you have it. We will get the 21-Mc. band when the engineering job on the new frequency list is completed.
When will that be? Well, the job started just about two years ago, around the beginning of 1948. The United States, as did other nations, sent a sizable group of government and in dustry people to Geneva, where they have been living and working daily ever since. In Washington, a "home team" was or ganized and holds frequent meetings to keep the delegation at Geneva supplied with essen tial data. A year ago, the international group at Geneva set a target date of May, 1949, for completion of the new list, and October, 1949, as the date for a special conference to approve it. Unfortunately, the difficulties en countered in drawing up the new list were such that as of October they hadn't even com pleted the new station list. As of October, how ever, they did set new target dates: some time during this Spring for completion of the sta tion list, and September of this corning year for the calling of the special conference to ap prove the job. Thus, it is possible to say that unless additional delays are encountered, we should expect the special conference to take place in September, 1950, to set a date for putting into effect the Atlantic City alloca tion table below 27.5 Me. How soon after September that date will be is, at the mo ment, purely guesswork. Of course, the setting of an effective date by the international group is only part of the story; we won't actually get the use of the band in this country until the FCC has made appropriate amendment of our
amateur rules to include the new band. For our own part, we can't at this time visualize any real possibility of our getting all this ac complished during 1950.
We would be tickled to death if it turns out we were wrong about that!
OUR COVER
As the midpoint of the Twentieth Century ar rives, we pause to take stock of the changing scenes in amateur radio over the past four dec ades. QST's picture files have provided us with these shots of typical old-time stations, which would seem to illustrate excellently the many milestones in the technical development of ham radio.
1910: The Sixth District station of 12-year-old Hugh F. Richards, featuring a single-slide tuner, crystal detector (replacing a recently-discarded electrolytic detector), spark coil and gap.
19110: 9ZN, owned by ARRL Central Division Manager R. H. G. ("Matty") Mathews. Trans mitters included two sparks and an i.c.w. tube set. Receivers were a Chicago Radio Lab "Paragon" and a Zenith model 1R.
1930: W9CPQ, John Kiesselbach operator. High-C tanks, mercury-vapor rectifiers, and an aluminum-paneled t.r.f. receiver were the pride of this ham shack.
1940: W9YQN, 'phone Sweepstakes winner for Kentucky, owned by W. E. Leatherman. Multi stage rack-and-panel rigs, an ECO, and a band switching superhet contributed to the perform ance of this outstanding contest station.
1950:................... . .1
CONSTITUTION & BY-LAWS AND OFFICERS' REPORTS AVAILABLE TO MEMBERS
In April of each year the officers of the League make comprehensive written re ports to the directors. The Board has made these reports available to inter ested members. The cost price is 75 cents per copy, postpaid. A copy of the Con stitution & By-Laws will be sent to any member free upon request. Address the Secretary at West Hartford.
10
QST for
A High-Attenuation Filter for Harmonic Suppression
Inexpensive Unit of Simple Construction for TVI Reduction
BY A. M. PICHITINO, * W3NJE
the objectionable features of being critical of ad
· As many hams arc finding out, the problem of keeping v.h.f. harmonics from getting into the antenna system is solved successfully when a good low-pass filter is installed -- once the direct radia
justment, of accentuating harmonics under cer tain conditions of tuning, and of effectively changing the output-circuit operating conditions, which can reduce efficiency.
The second method is to mount capacitors with
tion troubles are cleaned up. The filter described in this article offers high at tenuation in the TV bands together with s*implicity of construction. The home made condensers use a new dielectric material having many advantages in radio work.
low inductance close to the tube plates to provide a low-impedance path for the harmonic currents, thus by-passing them around the tank circuit and antenna. This method, although moderately ef fective, requires special capacitors and usually does not permit optimum LC ratios at the higher frequencies.
The third method is to install a low-pass filter
in the output coupling circuit to provide sufficient
he problem of television interference is being
Tfaced by increasingly large numbers of ama teurs as more areas become serviced by tele
attenuation of the harmonics but still permit the fundamental to pass unattenuated. This method has the disadvantage that the filter must be de
vision broadcasting stations. Many amateurssigned for a specific impedance and cannot be
who, a few months ago, were unconcerned about used directly with transmission lines of different
the TVI problem have had it forcefully brought characteristic impedance than that of the har
to their attention by the opening of local TV monic filter.
stations. There are, too, those much more difficult This discussion will cover the practical design
situations where a viewer feels that the erection and construction of a low-pass filter which will
of a 150-foot tower and installation of elaborate provide 75 db. or more attenuation at any fre
preamplifiers entitle him to primary-service-area quency above 54 Me. This degree of attenuation results even though he is a hundred or more miles is more than adequate, and plate traps or capaci
from the station. Fortunately, this problem has tors are not necessary. An output coupling circuit
been investigated by many amateurs and the con is also described which permits the use of bal
siderable literature that has been published anced or unbalanced lines of any characteristic proves that TVI can be eliminated in even the impedance.
most difficult cases.
It appears that conducted interference (direct
or induced) and radiation from power or intercon
necting leads can best be handled by proper
shielding, by-passing and filtering, as has been
competently described in the literature. The re
duction and effective elimination of harmonic
radiation from the output circuitry of the final
amplifier stage -- other than direct radiation,
which should be handled by complete shielding --
is generally accomplished by one of three meth
ods, and sometimes combinations of these
methods.
The first method is to install small, high-Q
parallel resonant traps in the plate leads, the
traps being tuned to the frequency of the har monic that it is desired to reject. This method has
The filter container is a 3 by 4 by 12 copper box, with all joints soldered except for the cover. The many screws
holding the cover in place insure a "leakproof" contact
* Senior Research Engineer, The Franklin Institute Labo between box and cover. A second coax connector is
ratories for Research and Development, Philadelphia, Penna. mounted on the far end of the box.
January 19S0
11
Fig. 1 --The filter circuit. Constants are calculated as follows:
Lt
= 0.184 ph.
6.28(45)10''
L< -- Li -|- Ls = 0.296 ph. Ls -- Lt + Lt -- 0.368 ph.
Ls = mLt = 0.61(0.184) = 0.112 ph.
1 3.14(45)10'(52)
L, -
Lt -
m
0.61
X 0.184 = 0.189 ph.
41.5 ppfd.
136 ppfd.
Design Considerations
First it is necessary to choose the characteristic impedance, Zo, of the filter. The Zo of the filter to be described has been chosen to be 52 ohms for a number of reasons: The filter can be inserted directly in any 52-ohm coax transmission line; it can be inserted in a coax link to feed an antenna coupler to match any type line; it prevents har monic currents from flowing around the filter be cause the coax link can be easily terminated in a correct maimer at a shielded transmitter cabinet; and it is easier to construct than higher-imped ance balanced types.
Next, the cut-off frequency ft of the filter must be selected. This choice is dependent upon a num ber of factors. A low-pass filter theoretically will pass all frequencies below f,, unattenuated and will attenuate all frequencies above by an amount determined by the type of sections used in the filter. Since ideal circuit elements cannot be realized, practical filters will show a very slight amount of attenuation (less than 0.25 db. and called "insertion loss") belowand appreciable attenuation usually starts somewhat before the design f,, is reached.
The filter we are going to construct is to pass all frequencies below 30 Me. with a minimum of attenuation. It might appear that an ft slightly greater than 30 Me. would be desirable, but another factor enters here to make our choice of f,, considerably higher. The input impedance of the filter will vary considerably within the pass band (below ,f0) unless impedance-matching end sections are used, and even then under the most favorable end-section design the impedance will
remain essentially constant only up to approxi mately 70 per cent of f,,. Therefore, we choose an /,, of 45 Me. (70 per cent of 45 Me. equals 31.5 Me.) which is slightly higher than needed but ties into the last consideration relative
to
The quantity m, which relates f, the fre quency of maximum attenuation, , of the end sections is given by the formula
An m of approximately 0.6 must be used to obtain the best impedance characteristic. With an m of
0.61 (almost optimum) and an/,, of 45 Me., the frequency of maximum attenuation, fx, will fall at 57 Me., the center of TV Channel 2. This is desirable because the second harmonic from a IO meter transmitter is usually the most trouble some.
We must now decide upon the number and type of sections to be used in the filter. It will be
convenient to use the metal box which will en close the filter as the ground side of any capacitors
table I Coil-Winding Data
Coil
M-
Inside Diameter
Length No. of Turns Wire Size
¿3 0.2
w 9 16"
4
0.31
i.y'
%"
5
12 enamel
12 enamel
¿5 0.37
w
6
enamel
12
QST for
we may construct. If possible, we should choose sections of a type in which the capacitors may be tied to the common or ground side of the filter. .Fortunately, sections of this type are feasible and are called "series m-derived" in the case of the end sections (actually half sections). The "con stant K, full `T'" type meets the requirements in the case of the intermediate sections. In gen eral, the amount of attenuation is proportional to the number of sections employed. Three sections will normally provide better than 60 db. attenua tion, which is sufficient for almost all installa tions, but we shall employ four full sections for good measure, particularly since the insertion loss is not measurably greater.
Fig. 1 shows the configuration of the final filter, with the series /«-derived end half-sections shown between points A-A and the three constant-K fulI-"T" midsections shown between points A-B, B-B, and B-A.
Construction
The filter enclosure consists of a metal box 3 inches high, 4 inches wide and 12 inches long. It is made of 18-ounce 0.023-inch hard-drawn cop per and is divided into four equal-sized compart ments by means of three J-i'6-inch-thick brass partitions. These partitions have 94-inch diam eter holes in their centers; the holes should be drilled before soldering the partitions into the box. The box corners should lie soldered tightly, along with the partitions, because the tighter the box electrically the better the attenuation. The box cover is made with a s^-inch lip on all sides and is fastened by means of metal screws 94 inch apart. The screws should not be placed farther apart as this will reduce the attenuation. The top cannot be soldered because the intense heat would melt the dielectric of the capacitors. The box construction is shown in the photographs. It will be observed in one of the photographs that the top edge of the box has been folded back upon itself, thus providing greater rigidity and a double wall thickness for the metal screws.
The formulas for the filter in ductors and capacitors are given under Fig. 1. The inductor wind ing information is contained in Table I, where it can be observed
that Li and £2 have been combined to form one inductor, Li, and two L, inductors combined to form Lt. It can also be observed that Lt, Lt and Lt have been increased slightly in value (com pared with the calculated values) to compensate for the effect of the shielding which reduces the inductance.
The capacitors are fabricated by using flat Iqe-inch brass plates in conjunction with the cop per box as the ground plate. The Ct capacitors are of the feed-through type and the Ct capacitors are straight ground type. Fig. 2 shows the capaci tor construction and formula. In computing the size of plates the loss of area due to the 94-mch holes must be kept in mind, along with the in crease in area due to the %-inch square plate used in Ct. Fringe effect may be neglected in these computations. The plate edges and corners should be rounded and the plates polished with very fine abrasive cloth. The capacitors are assembled using 8-32 brass hardware.
The dielectric used is a comparatively new plastic called "Teflon." It has very desirable characteristics, such as low losses, high voltage breakdown, uniform thickness, can stand mod erately high temperatures compared with most plastics, and is easily worked. Although the ma terial used in the filter is only 0.015 inch thick, it will withstand more than 15,000 volts. A word of caution is in order, however, in making the 8-32 clearance holes in the center of each piece of Teflon. Do not attempt to pierce the holes with a sharp pointed instrument as the Teflon will tear and the hole will be off-center and jagged. Use a sharp pointed knife to cut the material away, or drill through carefully using a drill press (yes, in spite of its being only 0.015 inch thick and a plastic!). If available, a leather punch would be ideal.
A few suggestions concerning the assembly of
An inside view of the filter, show ing the Hat-plate condensers with sheet Teflon dielectric. The partitions and bottom of the box also serve as condenser plates. Careful soldering at all joints insures good shielding be tween sections.
January 1950
13
Cza pí^tex
C2b Plate
p-Al,
Teflon
insulation
Bottom of-^
View from side of box
Plate C2b
(2 required)
Fig. 2 -- Construction of the capa citors Ci and Cs. Note that Ci makes
use of both sides of the partition. Capacitor dimensions are calculated
as follows:
C -
MMfd.
z dia. hole
O~It
h,,___ .fia?"--*. 1 Plate C2A (2 required)
where K -- dielectric constant of in
sulation (2.1 for Teflon),
N = number of plates, A -- area of one side of one
plate in square inches, and t -- thickness of dielectric in inches (0.015 in.).
To find area use I = --........* J-----------------
0.22i5K(.N - 1)
Ca OETA.IL
the filter will save time. Soldering lugs should be crimped and soldered to the inductors as shown in the photograph. The lugs should be bent to allow clearance for tightening the bolts with pliers or a small wrench. The bolts should be carefully centered in the H'-inch holes, because here the dielectric is air and the breakdown volt age is lowest, aside from the coax terminal con nectors. The easiest way to assure centering is to use a carefully-cut s^-inch diameter Teflon disk with an accurately-centered No. 8 clearance hole. One of these disks is placed between the two pieces of dielectric in each capacitor where it will center the assembly. Inductor Lg is carefully butt-soldered to a corner of plate Osa prior to assembly. In fact, all soldering except that neces sary to attach L% and Li to the standard coax terminal fittings mounted on each end of the box should be done prior to mounting the dielectric, to avoid possible damage due to excessive heat.
The dielectric shown in the photographs is a carry-over from earlier experiments and is much larger than necessary. Itneed extend only Jig inch beyond all plate edges.
Coupling io Transmission Lines
If the transmission line is 52-ohm coax, the filter is merely inserted in the line with the box grounded.
Considerable time was expended in an attempt
to provide a coupling system that would not re quire tuning, but with little success. While many antenna systems would load without difficulty, antennas with really flat lines could not be fed. After detailed investigation it was decided to go to the straightforward coupler shown in Fig. 3. This coupler has the disadvantages of requiring L and C to be of the same ratings as the final tank and requiring that another circuit be timed. How ever, the tuning can be made quite broad by moving the taps toward the coil ends to the point where the Q is lowered as much as possible while still permitting the desired loading. The adjust ment of this type coupler is described in detail in the Radio Amateur's Handbook and the 1949 A.R.R.L. Antenna Book.
References 1, 2, 3 are recommended reading on the subject of coupling to flat lines. It is also recommended that a Faraday screen be used at the transmitter end of the jink as in Fig. 3.
Performance
The filter provides greater than 75 db. attenua tion above 54 megacycles. The insertion loss is less than 0.25 db. The power-handling capability
(Continued on page 104)
1 Goodman. "Coupling to Flat Lines." QST, August, 1947. -Paddon, "Parallel Standing Waves," QST, January, 1948. 3 A.R.R.L. Antenna Book, 194.9 ed., pp. 122-23, 135.
Fig. 3 -- Recommended
type of antenna coupler for use in cases where the trans mission line is not 52-ohm cable.
14
QST for
Antenna Polarization on 144 Me.
A Report on Tests with Flop-Over Arrays
BY. EDWARD P. T* ILTON, W1HDQ
"In two years of work on 144 Me. with vertical antennas the best I could do was about 50 miles. Since I went horizontal I'm working 175 miles every night, and making contacts up to 500 miles when the band is good. I've been keeping ¡¡-meter skeds with IF----- for months, and though we're only 90 miles apart we never made a contact until we changed over to horizontal antennas. Now we
work easily every night. We think it significant that all the real DX has been worked with horizontal antennas."
Jnd so it goes! Correspondence received by the i writer, in more or less the above vein, would, if taken at face value, make it
appear that two-thirds of the 2-meter enthusiasts
of the country are committing the folly of the
century by continuing to work with vertical
antennas. To one who has been in the middle of
this polarization controversy for years it appears
that there are few subjects on which more false
evidence has been gathered and reported than
that of antenna polarization for v.h.f. work.
By now almost everyone should be familiar
with the arguments. They have been summarized
often in these pages,1 so we need not go through
it all again, except to say that there are reasons
(other than the ultimate one of which provides
the more readable signal) with considerable logic
in back of either position.
This report will be concerned only with which
polarization provides the best communication
over paths that are peculiar to amateur operation.
There have been numerous commercial surveys
for the purpose of determining polarization policy
for television, f.m., and mobile services. The
results are well known, and are obvious to any
city dweller who bothers to look up these days:
the broadcasting services are horizontal and the
mobile services are vertical; both of them for
solid logical reasons.
But since the amateur operation takes on some
of the aspects of both the broadcasting and
mobile services the choice is not so easy. Nor are
the conclusions drawn from commercial investiga-
* V.H.F. Editor, QST.
.......
1" V.H.F. Antennas -- Horizontal or Vertical?" QST,
Jan., 1947, page 35; " World Above 50 Me.," QST, March
and May, 1949.
tions necessarily applicable to our problems. Commercial interests have little concern for the factor most dear to many 2-meter enthusiasts -- which polarization will produce the stronger and more readable signals at 400,500, 800, or X miles; whatever distance will exceed the best they have been able to do so far. We will have to find out for ourselves, and mental bias in favor of one polarization can only becloud our efforts.
How, then, shall we go about it? Remember, we are interested at the moment only in which polarization provides the best communication; we are not going to compare one type of antenna with another. The following requirements must be met if we are to get a reasonable answer: (1) The antenna pattern must be the same in both planes. This rules out simple parasitic arrays, 16-element jobs, and many other justly popular designs that tend to favor one polarization over another. Our test array must be square or round, with uniform dimensions about the feed point. (2) Its position must not shift with respect to the array at the other end, when the change of polari zation is made, except for rotation in a vertical plane about a central point.
These specifications narrow down the pos sibilities considerably. We can see that our work must be done with flop-over arrays at each end. They must be pivoted about a central point, so that their separation and their height above ground do not change with polarization. Even with designs meeting these requirements there will be enough variables; use of anything else is almost certain to result in confusing evidence. Obviously there are not many 2-meter stations equipped to conduct polarization checks ef fectively.
The eternal question, horizontal or vertical, is sym bolized by this shot of the 12-element flop-over array at W1HDQ, stopped midway between the two positions. The lower array is a 4-element 50-Mc. job.
January 1950
The accompanying photograph shows the in stallation used at W1HDQ for the past several months. A 12-element array mounted 50 feet in the air is pivoted on a door hinge at the middle of the boom. It is rotated electrically from the operating position, but the flop-over operation involves ropes and pulleys. There is a well-beaten path from the shack to the base of the tower as a result of this latter consideration. Scores of polari zation tests have been made using this array with 2-meter stations in 5 call areas, at distances ranging from 12 to 450 miles. They have been made in several directions, under all sorts of propagation conditions, over paths that run the gamut from easy to very difficult.
Only two stations were found to have arrays conforming to the specifications outlined above. W1PIV, East Freetown, Mass., 100 miles, and W3KBA, Dover, Penna., 250 miles, both have 32-element arrays arranged for flop-over opera tion. Flop-over folded dipoles, erected especially for these tests, were in use at W1I1DF, Elmwood, Conn., and W10AX, South Coventry, 12 ho and 30 miles respectively. W2WFB, Schenectady, N. Y., 90 miles, had four half waves in phase with reflectors (four high when horizontal). W2PAU, Westmont, N. J., and W2EH, Col lingswood, about 160 miles distant, both had 10-element arrays of unusual design, consisting of two 5-element jobs spaced a full wavelength apart. All the above arrays were arranged for flop-over operation.
W4IKZ, Lynnhaven, Va., 400 miles, has two 10-element jobs of identical design, mounted one above the other. W1AAR, Boston, 95 miles, uses two 5-element arrays on different supports, with the horizontal much lower, and seemingly in a poorer spot. W3LFC/2, Toms River, N. J,, also compared two 5-element jobs, but in his case the horizontal was higher. W8UKS, Burton, Ohio, 450 miles, used four stacked dipoles with a screen reflector for horizontal, and 16 driven elements and a screen for vertical. W1MNF, East Orleans, Mass., 150 miles, compared a 14element vertical against a 7-element horizontal. W2SFK, Glens Falls, N. Y., 110 miles, has a 16element vertical and an 8-element horizontal. Checks were also made with W2PAU when he was using two identical 5-element arrays mounted on the same boom, with relay switching of the feed line for instant comparisons. W4A0, Falls Church, Va., 300 miles, had a 16-element hori zontal and an 8-element vertical.
Results
The first tests were made with the array at W1HDQ mounted on a temporary support, about 18 feet above ground. During this period horizontal comparisons were made also with an 8-element array (the 2-meter portion of the "VHF Sandwich" of June QST), which was
then mounted on the tower in the position now
occupied by the flop-over job. The inconsistent results obtained in comparing separate antennas of the same polarization show how misleading polarization tests can be if conducted with separate arrays. Repeated tests showed that first one and then the other of these two horizon tal arrays produced the stronger signals. One night in June W4IKZ and W2EH were running two S-units stronger on the high antenna. Then, less than 24 hours later, W4IKZ was averaging one S-unit stronger on the lower array.
When we first embarked on this program we ran into a series of experiences that seemed to show a vast superiority for horizontal. Every check seemed to provide a margin of one to three S-units in favor of the horizontal systems, but as we gathered more data, and began cor relating results in terms of the maximum and minimum signals observed on both polarizations, the margin between them narrowed. Particu larly, in the case of nightly skeds with W3KBA, we found that the S-meter readings varied over almost exactly the same range on either polariza tion. There was an important difference, how ever: communication was carried on more solidly with our arrays in the horizontal position. It was a small margin, but it was enough to permit an appreciably higher percentage of readability. This is attributable, at least in part, to the slightly better signal-to-noise ratio on horizontal, and also to seemingly less severe fading. Several times when the going was rough the no-signal periods lasted longer on vertical. This is signifi cant, as this 250-mile hop is a tough one when conditions are not extra good.
Another difficult path was the 100-mile moun tainous hop to W2SFK. Looking in that direction from the top of the tower at W1HDQ the horizon is only about 150 yards away, and within a few miles the elevation is more than 400 feet higher than our antenna. It's rough country all the way, and though it is a consistent c.w. schedule, signals are seldom strong enough for voice work. On this hop vertical has an advantage of about 4 db., resulting from John's 16-element vertical and 8-element horizontal. Horizontal is not good enough to overcome this advantage, and we find our circuit consistently better with vertical.
One oddity, as yet unexplained, except by horizontal protagonists, is the tremendous im provement experienced when W1AAR puts his low horizontal into service. Several checks indi cate nearly 15 db. advantage, yet the horizontal array is down behind trees and buildings and the vertical job is high in the clear. He has found this advantage in numerous checks with other stations as well as with the writer.
Also a surprise was the apparent superiority of horizontal on short paths, such as to W1HDF and W10AX. Repeated several times each, checks over these paths showed 10 to 15 db. in
(Continued on page 104)
16
QST tor
16th ARRL International DX Competition
C.W.: Feb. 10th-12th and March 10th-12th; 'Phone: Feb. 17th-19th and March 17th-19th
It's time again to ready your station for the ARRL International DX Competition, to be held in February and March of this year. This contest, the sixteenth of its kind, gives an opportunity for all W and VE operators to add new countries to their DX totals, other stations to fill in for their WAS and WAVE awards, and everyone to match DX operating skill with other
Explanation of DX Contest Exchanges
Exchanges
,,,,,, ,, . . Three-Digit Number,
,,ST
Representing Power
Station Worked " Jnput
Sample (c.w.)
579
150
Sample ('phone)
57
500
operators in his country or ARRL section. But, whether you have 9 or 9 hundred watts, whether you work 2 or 2 thousand stations, whether you have a wire out the window or a 7-element an tenna, you can have a whale of a lot of fun in this annual event.
As in the past, two week ends are devoted to c.w. operation and two to 'phone operation, giv ing everyone an opportunity to participate in four week ends of hot activity. The rules are practically the same as those of last year, except for three modifications. The c.w. quota for W stations is raised to 4 and for VEs to 6. Recent experience has shown that stations in certain foreign countries have difficulty making contacts during the second week of the contest after W and VE participants have filled their quotas. The increases should help to make more contacts available for foreign participants in the latter part of the contest. The old self-assigned number of past contests is replaced this year by a threefigure number representing the power input of your transmitter. If the input is 250 watts, your number is 250. If you run only 75 watts, use the number 075. Full kilowatts have a choice -- they can use either 000 or 999. If your input is different on different bands, change the number to ap proximate the input figure, but don't bother about 0.1 per cent accuracy on any band -- the usual approximation is adequate. The require ments concerning log forms have been changed. Foreign amateurs use, for both the c.w. and 'phone sections of the contest, the first form shown; W and VE 'phone contestants also use this form. W and VE c.w. contestants, however,
must use the special form shown in the sample. Entries by multiple-operator stations are en
couraged and will be listed, but only single operator stations will be eligible for the special certificate awards offered to the top 'phone and c.w. scorer in each country and ARRL section. Multiple-operator scores can be grouped with single-operator scores in club competition, how ever, and a handsome gavel is offered to the club with the highest aggregate score. Within a club; single-operator entries can compete for the "club certificate" awards given to the highest c.w. and 'phone scorers.
If you're new to the DX Contest, it won't take you long to catch on. During the contest period, stations outside of the U. S. and Canada will call "CQ W/VE" or "CQ TEST" and will exchange numbers as shown in the sample elsewhere on these pages. You can try a "CQ DX" or "CQ TEST" if you're a W or VE, but past experience shows that this pays off very seldom. On c.w., Ws and VEs have quotas but this doesn't apply to 'phone. Keep your log carefully, and send a copy of it, in the form shown, to ARRL. Free contest forms are available from ARRL Head quarters, West Hartford, Conn., upon request. Get your station working at top efficiency, make no social commitments for the important week
CONTEST TIMETABLE
C.W. Section:
Tim GOT AST EST CST MST PST
Starts
Feb. 10th 2400 Feb. 10th 8:00 p.m. Feb. 10th 7:00 p.m. Feb. 10th 6:00 p.m. Feb. 10th 5:00 p.m. Feb. 10th 4:00 p.m.
Ends Feb. 12th 2400 B'eb. 12th 8:00 p.m. Feb, 12th 7:00 p.m. Feb.12th 6:00 p.m. Feb. 12th 5:00 p.m. Feb. 12th 4:00 p.m.
The second period of this con test starts at these same hours Mar. 10th.
The second period of this contest ends at these same hours Mar. 12th.
'Phone Section:
GCT AST EST CST MST PST
Feb. 17th Feb. 17th Feb. 17th Feb. 17th Feb. 17th Feb. 17th
2400 8:00 p.m. 7:00 p.m. 6:00 p.m. 5:00 p.m. 4:00 p.m.
Feb. 19th Feb. 19th Feb. 19th Feb. 19th Feb. 19th Feb. 19th
2400 8:00 p.m. 7:00 p.m. 6:00 p.m. 5:00 p.m. 4:00 p.m.
The second period of this con test starts at these same hours Mar. 17th.
The second period of this contest ends at these same hours Mar. 19th.
January 1950
17
LOG, 16TH A.R.R.L. INTERNATIONAL DX COMPETITION
Sheet f of !
(.'all...... ........ ARRL Section.,... .or Country................
Dato & Time
Station Worked
Country
Record of New Countries for Each Band
3.3
7
4
27
28
P
a
i
Serial Numbers
n
I
Sent
Received
«
Feb. 18
mins GCT
VP9E
Bermuda
1
Feb. 19
1300
PA0GN
Netherlands
1306
G6CL
England
1345
PA0RA
Netherlands
2030
LU7AZ
Argentina
2310
VP9X
Bermuda
1
Mar. 18
1020
ZL1MR
New Zealand
2
1035
VK2TI
Australia
1
1105
VK2RA
Australia
1
1421
PA0LQ
Netherlands
Mar. 19
0925
TF3EA
Iceland
3
1245
G2MI
England
1255
G3KP
England
1350
G2MI
England
1430
G5BA
England
2320
KZ5AW
Canal Zone
4
56375
I
58375
9
58375
2
56375
·i
58375
57500
58500
47500
46500
3
45375
57500
3
3
56375
ri
57375
3
46375
5850Û
57080
3
47075
3
46150
ri
59080
3
57750
56050
3
58075
9
46100
3
45100
3
57100
3
57050
3
46125
2
57100
3
1
55100
«4
58500
3
Sample of report form that must be used by foreign c.w. and all 'phone participants.
ends, read the rules to acquaint yourself with the pattern, and then get set for more DX per kilo cycle per hour than your poor crystal filter and "Q5-er" have ever had to cope with before.
Rules
I) Eligibility: Amateurs operating fixed amateur stations in any and all parts of the world are invited to participate.
2) Object: Amateurs in the continental U.S. and Canada will try to work as many amateur stations in other parts of the world as possible under the rules and during the contest periods.
3) Conditions of Entry: Each entrant agrees to be bound by the provisions of this announcement, the regulations of his licensing authority, and the decisions of the ARRL Award Committee.
4) Entry Classifications: Entry may be made in either or both the `phone or c.w. sections; c.w. scores are independent of voice scores. Entries will be further classified as singleor multiple-operator stations. Single-operator stations are those at which one person performs all the operating func tions. Multiple-operator stations are those obtaining assist ance, such as from "spotting" or relief operators, or in keep ing the station log and records.
5) Contest Periods: There are four week ends, each 48 hours long: two for 'phone work and two for c.w. The c.w. section starts at 2400 GCT, Friday, February 10th and Friday, March 10th, ends 2400 GCT, Sunday, February
Sample of report form that must be used by W/VE c.w. participants. When a station is worked for less than the maximum number of points allowed (as for example the contact with G2MI shown above), the additional contact to make up the points not earned in the first contact should be entered at the bottom of the sheet. Canadian entrants should allow two blocks for each country, but may record no more than six contacts therein. A separate set of sheets should be used for each
band.
18
LOG, 16TH INTERNATIONAL DX COMPETITION
Call... .........
ARRL Section..............
Band..... ......Me. Sheet ../....of
Station Worked Date
PMiGX 2/11
·r.-ßS:a
PAURA 2/11
PA0LQ 3/11
Time (<1CT)
1300 1345 1421
Number Sent
589450
569450 459450
Number Received
479075 579080 578100
England
G6CL G2M1 G3KP «5BA LU7AZ
2/11 3/12 3/12 3/12 2/11
1306
589450 469150
1245
469125
1255
569450 579100
1430
469450 559100
2030
589450 579750
Argentina
-- ............ .... -
--
G2MI
3/12
1350
579450
QST for
12th and Sunday, March 12th. 'Phone section starts at 2400 GCT, Friday, February 17th and Friday, March 17th, ends 2400 GCT, Sunday, February 19th and Sunday, March 19th.
6) Valid Contacts: In the 'phone section, all claimed credits must be made voice-to-voice. In the telegraph sec tion, only c.w.-c.w. contacts count.
7) Exchanges: Each participating operator will use three figures to represent the approximate transmitter power in put. C.w. contestants will exchange six-figure numbers, each consisting of an RST report plus the three "power" num bers, (Examples are given in the sample log.) 'Phone con testants will exchange five-figure numbers, each consisting of a Readability-Strength report plus the three "power" numbers, if the input power varies considerably on different bands, the " power" number should be changed accordingly.
8) Scoring: a) Points: 1 point is earned by a W (K) or VE station upon receiving acknowledgment of a number sent, and 2 points upon acknowledging a number received. Two points are earned by any other station upon receiving acknowl edgment of a number sent, and 1 point upon acknowledg ing a number received. b) Final Score: W (K) and VE stations multiply total points earned under Rule 8(a) by the number of countries worked on one band plus the number of countries worked un each other band. All other stations multiply total points earned under Rule 8(a) by the sum of the number of W (K) and VE licensing areas worked on one band plus the number of W (K) and VE licensing areas worked on each other band.
Countries will be those on the ARRL Countries List. There are 18 licensing areas: 10 in the United States, 8 in Canada.
9) Repeat Contacts: The same station may be worked again for additional points if the contact is made on a dif ferent frequency band. The same station may be worked again on the same band if the complete exchange for a total of three points was not made during the original contact on that band.
10) Quotas: The maximum number of points per country per band which may be earned by W (K) stations in the c.w. section is 12, and contacts made on the same band with the same country after the quota is filled will not count. Thus complete exchanges with 4 stations in one country on one band fill the band quota for that country. The maximum number of points per country per band which may be earned by VE stations in the c.w. section is 18, and contacts made on the same band with the same country after the quota is filled will not count. Exchanges with 6 stations in one coun try on one band are thus permitted VE participants. There is no quota for stations in the c.w. section outside of W (K) and VE. There is no quota for any station in the 'phone section.
11) Reporting: Contest work must be reported as shown in the sample form. Each entry must include the signed statement as shown in that example. Contest reports must be mailed no later than April 20, 1950, to be eligible for QST listing and awards.
12) Awards: To document the performance of participants in the Sixteenth ARRL International DX Competition, a
(Continued on page 108)
SUMMARY, 16TH A.R.R.L. INTERNATIONAL DX COMPETITION
....... ....... Entry Call. (C.W. or 'Phone)
....... ARRL Section. ........... ...........or Country.........................
Name............ .. ...............
Address.............. .......... ....................
Transmitter Tubes........... .................................................... ............ ......
Receiver.....................
Antcnna(s)........ ..... .................. .......
(Logs from W or VE show number of foreign countries worked. Logs from other countries show number of U.S.A. and Canadian call areas worked.)
Bunds
Nr. Countries QSOed
Number of contacts
3.5
U
ar
$8
Me.
Me.
Ma.
Me.
Me.
1
4
3
Total
*8 15
Number of Different Countries Worked...... ......... Number of Hours of Station Operation:.......................
Assisting Personis): Name(s) or Call(s)
................................. 45................................... X....................................8....................................-......................................360..........................
(Points)
(Multiplier)
final score
Participatingfor Club Award inthe........... .................. ............ ............ ........... (Name of Club)
I certify, on my honor, that I have observed all competition rules as well as all regulations established for amateur radio in my country, and that my report is correct and true to the best of my belief. I agree to be bound by the decisions of the ARRL Award Committee.
* Figure in this box is multiplier.
Operator's Signature
Sample of summary sheet that must accompany all reports.
January 1950
19
A One-Tube VFO Amplifier
BY GERALD T. W* HITE, W3LTR, AND L. W. S**IECK, W4KMG
There is no need these days to elaborate on the advantages of VFO operation. For those operators who use one of the LM-series heterodyne frequency meters (the BC-221 is quite similar), this article will show one method for coupling these units to a subsequent amplifier or frequency-multiplier stage, and there is no reason why the same principle cannot be applied to any VFO. All in the series, with the exception of the LM and the LM-1, have a fundamental output in the high-frequency range of from 2 to 4 Me. The calibration is accurate, the stability is good, the unit is well shielded, and internal volt age regulation is furnished.
A one-tube amplifier for using a surplus LM frequency meter as a VFO. It is mounted on the chassis with the power supply.
An adequate amplifier for one of these units presents a problem. Various circuits for such an application have been published, but all of those that were tried failed to meet, our particular re quirements. They either had to be retimed with a change in frequency or they required too many tubes, or both. The goal was a one-tube amplifier and, of all of the various tubes that were tried, the 6AG7 seemed best, suited for the job. The 6AG7 has a very high mutual conductance, and it, is rated at 140 volts peak output over a video band extending to 4 Me. To simplify construction and to obtain even greater output, the amplifier bandwidth was confined to a range from about 3.4 to 4.1 Me. It was found that the resultant output ranged from 155 to 105 volts over the
* Lieut., USN; Electronics Test, NATO, Patuxent River, Md.
** 1063 No. Montana St., Arlington, Va.
range of 3.5 to 4.0 Me., when working into a 27,000-ohm resistor, with no retuning of the amplifier.
It was found that by-passing the plate of the oscillator to ground with a 0.1-pfd. condenser made no noticeable change in frequency, indi cating that considerable reactive loading could be applied without affecting the accuracy of calibra tion. About 3 volts peak was measured at the plate before circuit modification. After connecting a one-foot length of coaxial line to the plate, the voltage dropped to 2 at 2 Me. and to 0.75 at 4 Me. Greater voltage was obtained by placing an inductance at the amplifier grid end of the coaxial cable and tuning it, with the cable capacity, to 4 Me. The tuned inductance did not func tion as well when placed at the LM end of the cable.
Since adjustable inductors were not available at the time, trimmers were placed across the coils to tune out the reactance. About 5 to 7 peak volts was obtained at the amplifier grid, over a range of about 300 kc. It is believed that superior re sults would be obtained by using slug-tuned coils and no additional capacity, since the lowered capacity would result in a lower-Q circuit. A plate tank circuit tuned to the same frequency as the grid circuit made the amplifier regenerative and decreased the bandwidth. The final answer was found in stagger-tuning three circuits, one in the grid and two in the plate, as shown in Fig. 1. Almost any desired response curve can be ob tained by the relative tuning of these three circuits.
Construction
The amplifier was built on the same chassis as the power supply for the fre.quency meter and the 6AG7 amplifier. It is mounted in the bottom part of the carrying case, as can be seen in one of the photographs. The grid coil is mounted under the chassis, and the trimming condenser, C\, can be adjusted through a hole. The two plate coils are mounted above the chassis, at right angles to each other.
The power supply delivers 340 volts at 40 ma. When using high voltage like this on the LM, the internal jumpers in the frequency meter must be set for the high-voltage condition.
Low-capacity cable (RG-53/U) was used be tween the LM and the 6AG7 grid circuit, and low-capacity "automobile antenna lead-in " cable was used from the plate circuit to the following stage in the transmitter. The "automobile" line
20
QST for
LJ
Fig. 1 -- Wiring diagram of the
VFO amplifier.
Ci, C4, Cs -- 3- to 30-ggfd. mica compression trimmer.
Cs -- 3 X 0.1-gfd. 400-volt bath tub.
Cs -- 10-iipfd. ceramic. Cs -- 0.01 gfd., 600 volts. Ki -- 100 ohms, Li watt.
R , R k s -- 27,000 ohms, 1 watt.
Li --47 turns No. 26 enam., close-wound (4 Me.). Ls -- 86 turns No. 26 enam., close-wound (3.5 Me.). Lj.-- 87 turns No. 26 enam., close-wound (3.7 Me.).
All coils wound on Li-inch diameter forms.
was the lowest-capacity line that could be found. It is available in 3-foot lengths, and could have been used between the LM and 6AG7 circuit as well.
Operation
The over-all response of the circuits can be determined by measuring grid current in the stage driven by the 6AG7, or by using a v.t.v.m. across the 27,000-ohm resistor. The final adjustment of the amplifier should, of course, be made while it. is connected to the transmitter, to include the effect of loading across Hg. After adjustment of the tuned circuits, we were able to get about 150 volts from 3.5 to 3.75 kc., tapering down to 105 volts at 4 Me. This is plenty to drive any of the usual crystal-oscillator tubes.
The LM VFO and 6AG7 amplifier combination has been in use at W4KMG for the past two years and has proved to be quite satisfactory. It drives a
6L6 doubler, which used to be the crystal-oscilla tor tube, at about 6 ma. grid current. This 6L6 drives another 6L6 doubler to 14 Me., followed by a TZ40 running at 100 watts input. On c.w., the two 6L6s are keyed in the cathode circuit. In covering the range 14.0 to 14.4 Me., the only stage that requires retuning is the TZ40 plate tank and, of course, the LM frequency control. An extra set of contacts on the send-receive relay in the transmitter is wired in parallel with the plate switch on the LM, through spare terminals on the LM power plug. Thus the LM is turned on simultaneously with the transmitter, or independently by the switch on its panel.
(Since this article was prepared, several other versions of the amplifier have been built. In these the 6AG7 was mounted horizontally on the back of the LM. Terminal strips were used to take the ground, heater, plate power and r.f. output leads, thus eliminating the coaxial cable in the grid circuit. The grid coil is wound on a 1-megohm resistor, and adjusted to resonate with the stray capacities in the circuit. The plate capacitors were eliminated by using slug-tuned coils. The reduc tion of circuit capacities increased the bandwidth of the amplifier considerably, with no appreciable reduction in gain.)
FEED-BACK
In Mack Seybold's article, "The Design of Low-Pass Filters," December QST, the value of capacitance shown in Fig. 5, page 19, should be 1000 wtfd. instead of 100 mmM. At the top of page 22 the figures in the denominator should be 10® instead of 10. On page 24 the captions " Bal anced" and " Unbalanced" should be transposed. In Fig. 15 the vertical scale should read 0 to 70 instead of 10 to 80.
SWITCH
The amplifier and power supply mount in the base of the LM carrying case.
TO SAFETY !
January 1950
21
Folded Elements in a Reversible Unidirectional Array
A Compact Wide-Band Fixed Beam Antenna for 14 Me.
BY BRUCE KELLEY, * W2ICE/W2QCP
Having witnessed the recent splurge in TV directive antennas, many of which are of the stacked type, and after talking with some of the v.h.f. boys, it was concluded that there might be something to this business of confining vertical directivity after all. There is no denying that many of us using simple half-wave antennas are wasting power in radiation at verti cal angles so high as to be of no value in the kind of communication in which most of us are chiefly interested. Through stacking, one can bring more of this wasted energy down to useful angles.
lake many others, we've been backward in considering stacked arrays for 14 Me. because it was assumed that the required dimensions, par ticularly the height, would be prohibitive. How ever, some study of the problem revealed that a worth-while unidirectional array of small propor tions is readily possible.
The original antenna at W2ICE is shown in Fig. 1A This type of radiator is a three-quarterwave folded arrangement, which differs from the more conventional half-wave folded dipole in that the return center is left open, the wire not forming a continuous loop. The gain provided by the additional length is equivalent to that ob tained with the extended double-Zepp arrange ment. A second section was placed under the original, forming a modified version of the com pact Lazy H as described by Kraus many years ago.*1 This is shown here in the sketch of Fig. IB. However, this arrangement differs from that described by Kraus in that the spacing between the upper and lower elements is less than a half wave and the antenna is designed for 14 Me. in stead of 28 Me.
Vertical Spacing
While the vertical spacing between upper and lower elements may be anywhere from 24 to 34 feet (% to H wavelength), one should use the greater spacing if possible. However, experience here has shown that' bv the time one gets the lower element above the ground any appreciable distance, the required pole height really starts to go up. The open line between the upper and lower sections must always be a half wave in length, regardless of the vertical spacing, and with no transposition. We had only 38-foot poles,
#181 Chili Ave., Rochester 11, N. Y.
1 "Radio, October, 1939.
so the spacing between the upper and lower ele ments was made about 29 feet, with the lower section about 8 feet off the ground. Over a foot was lost in drag at the pulleys and insulators. Since the electrical spacing is 34 feet and the physical but 29 feet, a loop was necessary to take up the difference. For constructional convenience it is best to have the take-up loop at the bottom element. The antenna is fed in the - electrical center of the half-wave vertical section. The feeder should leave the half-wave section at as nearly right angles as possible before going down, as indicated in Fig. IC.
Three of these Lazy Hs were constructed and
Open
±
(A)
4 io 6 spacing 400 to soon
To Xmtr 400 to 550 A line,any length
Vertical phasing line Xs at least 2Z or more
co
To Xmtr
Fig. 1 -- A -- Simple three-quarter-wave folded
antenna, B -- Lazy H type antenna with three-quarterwave folded elements. C -- Feeder connection to phasing section.
22
QST for
The Lazy H reversible array at W2ICE shown here is
strung from rough-cut poles. The poles are only 38 feet
high. The lower set of elements is eight feet off the
ground and the spacing between upper and lower ele ments is 29 feet. The direction change-over relay is in
the box on the short pole at the center.
placed to form a cartwheel. A common center pole served to support one end of all three an tennas, with each antenna leaving the center pole at intervals of 120 degrees of arc. A 500-ohm open line 250 feet long was run from the transmitter to two d.p.d.t. relays. Through these relays it was possible to obtain six directions (each antenna being bidirectional) for a coverage of 360 degrees. This system was left up for a period of six months with good reports locally as well as from DX.
Some trouble was experienced in making all three arrays load exactly the same when switch ing from one to another. This difficulty was over come by experimenting with the lengths of the feeders between the phasing sections and the re lay box and by avoiding, as much as possible, the running of the feed lines parallel to the antenna proper.
The only comment we can make about this type of Lazy H is that we found the horizontal pattern extremely broad. With the arrays spaced 120 degrees, considerable overlapping was no ticed. An antenna located in the northeast corner of U. S. A. can place an effective signal over the whole country. However, DX signals coming in on the center of a beam would frequently drop as much as five S units when a shift was made to another antenna 120 degrees away. Local signals for some reason did not show this great drop, probably because .of the broad patterns in both vertical and horizontal planes.
Uzidireciional System Pleased with the results from this bidirectional system, it was decided to change over to a uni directional array which would further increase the efficiency, since only one direction at any given time is of any value, of course. The Handbook says that a collinear array becomes unidirec tional when a similar array is spaced a quarter wave behind it to act as a parasitic reflector. It was further noted that the addition of a parasitic element at a quarter-wave spacing would lower the impedance but slightly. Two of the original Lazy Hs were lowered and rearranged as shown in Fig. 2. A d.p.d.t. relay was mounted on a post halfway between the two arrays and connected in such a manner that it was possible to use either set of elements as the radiator, the dis connected elements always acting as the reflector as in Fig. 3. Care was taken to see that the lengths of feed lines from the vertical phasing section to the relay were both the same. This resulted in no change in load or tuning of the transmitter when changing directions. An unbalance in a number of feed lines can be a headache, particularly in contests where rapid changing of directions can pay off. Needless to say, a definite difference was noted between the bidirectional array and the unidirec tional system. The addition of the extra set of elements increased the forward gain from 3 to 4 db. and appeared to have lowered the vertical angle. Although no actual checks were made with a field-strength meter on the front-to-baek ratio, numerous tests were made with stations which gave fairly accurate results, since it was possible to change direction instantly by merely throwing
Fig. 2 -- Dimensions of the Lazy H array. Feeder
switching connections are shown in Fig. 3.
January 1950
23
the relay switch in the shack. The author has al ways been skeptical regarding tests made with outside stations with a rotary beam. Unless con ditions are unusual, anything can happen by the time a beam has been rotated 180 degrees. On the average, a difference of 1H to 2'2 S units in strength was noted when reversing direction on local or loud signals, whereas on weak or distant stations a greater difference usually showed both on receiving and transmitting.
Fig. 3 -- Feeder-switching system for changing direc
tion with the Lazy II array. The distance X should be 2 to 5 ft., T approximately 17 feet. The size of the take-up loop depends on the spacing between the upper aud
lower sections. Ry is a d.p.d.t. relay-. All line spacing can
be 3 to 6 inches. Lengths of similar sections should be kept equal.
This will give 31-foot spacing without a loop, since the lines to the relay box will tend to pull the vertical sections inward, thus taking up the slack.
At no time were any of the dimensions found critical, the only caution necessary being to keep like sections somewhere near equal. With the di mensions given, the antenna will tune the entire 14-Mc. band without any tuning or cutting. Since the elements are folded, it was found to load practically flat over the entire band with little change with weather conditions. Mechanical details have not been discussed here, since every one has his own ideas on the subject. Although ordinary No. 12 antenna wire may be used throughout, it was found that No. 10 aluminum wire could be bought at a local supply house for slightly more than regular wire, with the ad vantage that the aluminum is much easier to handle. I was able to cut some rough poles from a near-by patch of woods, so the supporting struc ture, while perhaps not too beautiful, was cheap enough.
With the beam pointed either NE or SW, it was possible over a few week ends of 14-Mc 'phone operation to work stations anywhere from North Africa to Sweden in one direction and from Central America to Australia in the opposite direction. All reports were flattering. Maybe it was the power or the location, but we like to think it was the antenna.
Strays^
Conclusions
In summarizing this antenna, we feel that it has a forward gain equal to, if not far greater than, a three-element rotary at the same height. It does not possess the horizontal receiving dis crimination of the latter but, in turn, the broader vertical pattern of the stacked array has the ad vantage of consistent communication over a longer period of time. With the height possible at W2ICE, it was judged that the vertical pattern should peak somewhere between 25 and 30 de grees from the single Lazy H and at a much lower angle for the undirectional array. However, tliis point may be open to question, since the array is located on the crest of a hill with a drop of approximately 60 feet at a 45-degree angle in one direction. This may have a tendency to make the vertical angle less than if it were on perfectly horizontal terrain. We strongly advise anyone erecting this array to try and have it as high as possible, not only to lower the vertical angle but also to clear surrounding objects. As an ex ample, if 48-foot poles are available, try to have the lower section about 17 feet off the ground.
In recognition of the emergency-service value of ama teur radio operators, Florida is issuing special license tags to ham automobile owners. Looking at one of the new plates is C. Ralph Dawson, W4HG0, and State Senator Lloyd F. Boyle, W4IMJ, sponsor of the legisla tion.
24
QST for
10-Meter WAS Contest
CONTEST PERIODS
and hope for short skip, long skip and ground wave.
Time
Start
find
Rules
EST CST M8T PST
Jan. 6th and 13th
6:00 p.m. 5:00 p.m. 4:00 p.m. 3:00 p.m.
Jan. 8th and 15th
6:00 p.m, 5:00 p.m. 4:00 p.m. 3:00 p.m.
1) Eligibility: The contest is open to all radio amateurs in the sections listed on page 6 of this issue of QST.
2) Time: All contacts must be made during the contest periods listed elsewhere in this announcement.
3) QSOs: Contacts must include report received and sent,
location of station worked.
4) Scoring: One point is allowed for each contact and one
f you're a member of the ten-meter gang,
I here's an activity that was designed espe cially for you. Even if you're not a "regular"
multiplier point for each new state worked. The same sta tion may be worked but once during the contest for credit. The final score equals the total contact points multiplied by the total number of different states worked.
on the band, you'll want to join the fun! This 5) Reporting: Contest work must be reported as shown in
contest will give you the opportunity to pit your skill against the best operators in your section and also give you the chance to get some of those
the sample form. Closing date of entries is February 1, 1950. 6) Aivards: A certificate will be given the highest scorer
in each section.
states needed for WAS.
If you are located anywhere in the League's
field-organization territory (see page 6, any
QST), you are cordially invited to.take part in
this new operating activity. Contest reporting
forms will be sent to all amateurs who request
January, 1925
them by mail or radiogram but it is not necessary
. , . Africa and Asia are the only continents unreported
to use these forms if the sample form shown is followed. Total available operating time will be 96 hours. C.w. to c.w., 'phone to c.w./c.w. to
as "Super DX" QSOs become commonplace on 75 to 100 meters.
. . . "Calls Heard" has taken on a definite international flavor, with American and Canadian amateur signals being
'phone, or 'phone to 'phone can be used. Tune up your gear now, oil the beam, cross your fingers
reported in England, France, Belgium. Italy, Spain, Sweden, Argentina, Australia and New Zealand.
. . . Outstanding low-power work on the new 40-, 20-and
5-meter amateur bands will be recognized by silver loving
10-METER WAS CONTEST REPORT
cups donated by J. C. Cooper of Atlanta, Ga., and by ARRL. ... A Second Govemors-President Relay is announced
by the- Traffic Manager for March, to tie in with the inaugu
Station....................
Location.......................
ration of President-elect Coolidge. . . . To meet the requirements of low-loss tuners for the
Date and Time
Station
Report Sent
Report Received
Location
Number of Each New State as Worked
short waves, coils with low distributed capacity and r.f. resistance are reviewed by the Hq. technical staff. John M. Clayton, 1DQ, presents a cylindrical self-supporting type; Technical Editor S. Kruse details a form-wound model with spaced turns; Department Editor L. W. Hatry reviews the
Jan. 6
6:01 p.m. W9MIR
57
58
Ill.
1
6:03
W5DEW 56
57
Texas
2
6:06
W50QT
45
46
Okla.
3
6:10
W0ICW
58
59
Mo.
4
6:13
VE4AB
579
57
Man.
6:18
W9RBI
57
56
Wis.
5
6:21
W9YMF 58
599
Ill.
Jan. 7
3:00 p.m. W4NFY
57
57
Fla.
6
3:06
W6TT
59
59
Cal.
3:10
W9CFT 589
579
Wis.
3:13
W6AM
569
589
Cal.
3:17
KP4AB
59
59
P. R.
electrical and mechanical characteristics of an ideal inductor. . . . Technical Editor Kruse outlines the fine points of
the low-loss neutrodyne c.w. tuner of Don Wallace, 9ZT. . . . Amateurs and broadcast listeners have been asked
by the Scientific American to cooperate as observers during the fading tests to be held in conjunction with the total eclipse of the sun on January 24th.
. . . Acting Secretary of Navy L. W. Eberle has thanked amateurs for their assistance in maintaining communication during the recent 'round-the-country flight of the dirigible Shenandoah.
. . . Every district supervisor of radio was present at the Department of Commerce's Third National Radio Confer ence at Washington. Those attending were Messrs. R. Y. Cadmus, Third District; S. W. Edwards, Eighth District;
Number different stations worked: 12
Number different states worked:
7
Claimed score: 12 points X 7 states -- 84
W. D. Terrell, chief supervisor; Theo. G. Deiier, Fifth Dis trict; E. A. Beane, Ninth District; Oscar R. Redfern, Seventh District; Walter C, Van Nostrand, Fourth Dis trict; Charles O. Kolster, First District; Arthur BatcheUer,
I have observed all WAS Contest rules as well as all regula tions established for amateur radio in my country. My report is correct and true to the best of my knowledge.
Second District; and John F. Dillon, Sixth District. . . . Improved circuits and mechanical arrangements for
operating mercury-arc rectifiers are detailed by Earl D. Smith. 3PZ-3XO.
Signature.................. ...........
. . . "Making Your Own Bug" entitles an interesting how-to-build-it article by Ralph E. Kepler, 8OT; similarly,
Address....................... ..... .
A, W. McAuly, 8CEO, gives the dope on a homebuilt pri mary filament rheostat.
January 1950
25
Walkie-talkies, modified to the CMRC mobile frequency of 29.64 Mc. by W9LLX (shown), were a valuable adjunct to handling Shrine parade communications.
Chicagoland Ham Mobilers Serve as Communications First-Liners
embers of the Chicagoland Mobile Radio
M Club -- 142 units strong at last tally -- have in recent months turned in a series
some cars traveling as many as 300 miles along the right-of-way, while others burned fifteen gal lons of gasoline to keep their batteries charged.
of successful communications efforts which shouldWith valuable lessons learned and rough spots
be inspiring examples for similar amateur groups polished off, the Chicagoland gang a few weeks
throughout the land.
later provided efficient communications for the
The initial trial of the Club's mobile commu Chicago Sim-Times model airplane meet at Frank
nications net was the Navy-sponsored model air lin Airport. Hore 20,000 spectators learned of
plane meet held at Glenview Naval Airbase, with the emergency communications potentialities of
55,000 people in attendance. Working closely ham radio, as CMRC mobile units retrieved 27
with the walkie-talkie operators of the Midwest models, including one which had drifted 28 miles
V.H.F. Radio Club (p. 52, Oct., '49, QST), from the field.
Chicagoland mobile units transported Naval ob The activities of the club have been favorably
servers and retrieved 52 model planes. The v.h.f. reported by the press and radio. Of special note
gang reported scores to the mobile units, and also was the televising of club members on the WGN-
relayed descriptions of planes which were drifting TV Chicagoland Newsreel program conducted bv
away from the field.
Spencer Allen, W9JGL. Dr. W. S. Kelly, W9-
The big tests of the CMRC mobile circuits were MDO, CMRC president, has received for the club
two six-hour-long Shrine parades, held in Chicago numerous letters of commendation from military
on successive days. It is estimated that tw'o mil and civic leaders.
lion people lined the parade right-of-way from Chicagoland mobile units operate on 75-, 20-
Erie Street to Soldiers Field, where an additional and 10-meter 'phone, and 40-meter c.w. All cars
90,000 spectators, including President Truman have modern noise-suppressing gear installed, and
and his party, waited. Acting under the direction virtually all receivers have effective noise limiters.
of the Parade Marshall and carrying Army offi In many instances vehicles have provision for
cers, the CMRC mobile cars handled all traffic changing frequency or band from the driver's po
necessary to assembling, directing, and dispersing sition. To cope with any emergency, 12 monitor
the huge processions. Sixty calls for ambulances ing stations are .maintained in the Chicago area
were handled in routine fashion, as were several to receive call-ins, day or night, on the Club's
requests for police aid. All cars carried identifying official frequency of 29 64 Me. (Photos on
placards, which took them through police lines. these pages by "Chuck" Kelly and Brandt &
The parades were an iron test for the mobile units, Wright.)
26
The Nayy, Midwest V.H.F. Club, Chicagoland Mobile Radio Club and photographer go into conference over the ownership of model aircraft at the Glenview, meet.
W9MDO/9 and W9JZN/9 operating at the Glenview Naval Airbase model aircraft meet. MDO is president of the Chicagoland Mobile Radio Club.
Meeting point before parades. L. to r.: W9MD0,
W9LLX, W9GW, W9NLP, W9HLB, W9FC0, W9RSJ, an unidentified W4, W9M0, W9BEQ, and Army per
sonnel under command of Maj. Houghton.
W9MDO/9, located at Soldiers Field during both parades, acted as liaison with the Parade Marshall's car, with Army officers in charge of dispersal of parade units, and with ambulance and jeep dispatch.
Three Army jeeps and 20 ambulances were on stand by during the parades. They were dispatched by CMRC radio control cars.
Everywhere the Parade Marshall went CMRC hams went along too. W9KB0 handled communications for the Marshall's car the first day, W9HLB the second.
Happening the Month
AMENDED F.C.C. PROPOSALS
The Federal Communications Commission on November 16th issued a further Notice of Pro posed Rule Making which is reproduced on the adjoining pages. This document in effect washes out the earlier notice of last April and outlines what FCC now proposes to change in the amateur regulations. Comments may be filed by any in terested party until January 16, 1950.
In most respects the Commission has adopted the recommendations of the informal engineering conference it sponsored on October lOth-llth, which in turn were adopted from the decisions made by the ARRL Board of Directors on Octo ber 8th. ARRL-conference recommendations are followed precisely as concern frequency assign ments, telephony subbands, n.f.m. privileges, etc. FCC has discarded its earlier proposal for es tablishing 'phone bandwidth limitations. It has retained, contrary to conference recommenda tions, the principle of "hours of operation" and a statement of code speed as a condition to renewal; however, the new proposed language is such as to eliminate the primary objections earlier made by ARRL and the conference.
The Novice and Technician Classes, which re ceived approval by the informal conference, are an integral part of the new proposals, to become available January 1, 1951 (the intervening time will be required, says FCC, to work out adminis trative details). But so is the Amateur Extra Class license, which was rejected by the confer ence; however, the League-conference objections had been primarily on the basis that the Extra Class license appeared simply a device to require eventual reexamination of present Class A opera tors, and the new language eliminates at least some of those objections. The Commission now proposes to write the rules so that holders of Class A privileges (under the new name of Advanced Class) can renew licenses so long as they can con tinue to meet renewal requirements; but after December 31, 1951, no new Advanced Class (Class A) licenses will be issued, and new appli cants for "Class A" privileges will therefore have to obtain the Extra Class ticket, for which they become eligible after two years of license tenure, by passing an examination which includes a 20-w .p.m. code test and a more difficult written exam. Thus the effect will be to raise the examination re quirements for the class of license conveying present maximum privileges, but providing a "grandfather" clause to protect those persons already licensed for such privileges. In addi
tion to the new name of Advanced Class to re place Class A, FCC proposes to apply the title of General Class to the present Class B ticket, and Conditional Class to the present Class C license.
The new language for § 12.0, Basis and Purpose, differs slightly from the draft ARRL presented to the informal conference as what it might consider acceptable; these differences may be ascertained by comparing the adjoining copy with that on page 27 of December QST.
These matters are now under discussion among the Board of Directors to determine what position the League will take on the new proposals.
BOARD MINUTES CORRECTION
An error has been discovered in the minutes of the special meeting of the ARRL Board of Direc tors, held on October' 8th. After discussion and voting on the Technician Class license (paragraph 12, page 32, December QST) Director Harold C. Bird requested to be recorded as voting opposed but this request was inadvertently overlooked in preparing the minutes. Paragraph 12 should therefore read:
12) On motion of Mr. Collett, after discussion, VOTED to accept the proposal to amend § 12.23 as concerns the es tablishment of a Technician. Class license for operation on frequencies above 220 Me., but with a request to the Com mission that such licenses carry distinctive call signs. Mr. Bird requested to be recorded as voting opposed.
DIRECTOR ELECTION RESULTS
As a result of autumn elections in seven ARRL divisions and Canada, three new directors and four new alternates have been chosen by the membership, to take office January 1st, while four present directors and two alternates were returned to office.
John H. Brabb, W8SPF, becomes director of the Great Lakes Division, having received 761 votes to 682 for the incumbent, Harold C. Bird, W8DPE. The new director is partner in the law firm of Brabb & Waltensperger and is well known to Great Lakes hams, having been their alternate director since 1946. W8SPF is a Lt. Commander, TJSNR, and has many years of ham background, having been first licensed in 1922 as 8CRW. In the race for alternate, Harold E. Stricker, W8WZ, won handily by receiving 863 votes to 582 for his opponent, George H. Goldstone, W8MGQ. A physician, "Doc" has been an assistant director and is currently SCM of Ohio. First licensed as 8WZ in 1919, he has DXCC, WAC, WBE, WAS, RCC, OTC, and his call is
28
QST for
well known to participants in traffic and contest activities.
Kenneth E. Hughes, W6CIS, was chosen as the new director of the Pacific Division (to replace William A. Ladley, W6RBQ, who was not a candidate) winning over his opponent, Harry Engwicht, W6HC, 711 votes to 511. Ken is chief radio operator for the California State Depart ment of Agriculture market news service and has a good background of ARRL organizational ex perience, having been SCM of San Francisco and,
as current alternate director, the representative of the Pacific Division at recent Board meetings. He is ORS, 00, and a member of the A-l Opera tor Club. To succeed Hughes as alternate the Pacific Division, in close balloting, picked C. Porter Evans, W6BF, with 627 votes to 581 for Ronald G. Martin, W6ZF. OM Evans is an electronics engineer engaged in nuclear physics research for the Navy, is OBS and secretary of the Mission Trail Net.
The third new director is Lamar Hill, W4BOL, chosen by Southeastern Division members to succeed William C. Shelton, W4ASR, director since 1940. The tally:
Richard H. Alford, W4B0C................................ .205 votes
Lamar Hill, W4B0L..........................................
269 votes
Anthon Litschauer, W4JQ. ...................................... 32 votes
William C. Shelton, W4ASR........................
211 votes
W4B0Lis manager of the G. B. Hill Lumber Co., active on all amateur bands, licensed since 1931, and PAM, ORS, and 00.
William W. Butchart, VE6LQ, becomes the new alternate Canadian General Manager, nosing out the incumbent, VE3AZ:
William W. Butchart, VE6LQ..................................379 votes Ronald J. Hesler, VE1KS........................................... 135 votes Leonard W. Mitchell, VE3AZ.................................. 340 votes
OM Butchart is an architect and plant superin tendent for the Edmonton public schools, ORS and a member of the A-l Operator Club, a former SCM and currently an assistant director.
Alex Reid, VE2BE, remains Canadian General Manager by a vote of 577 to 289 for his opponent, Thomas Hunter, jr., VE3CP. Goodwin L. Dosland, W0TSN, was returned to the Board as director of the Dakota Division, 377 votes to 144 for Willard D. Nelson, W0YPN. Victor Canfield, W5BSR, was reflected director of the Delta Di vision, 250 votes to 135 for J. T. Hargis, W5AQF, and 221 for James W. Watkins, W4FLS. Leonard Collett, W0DEA, retained the directorship of the Midwest Division by a thumping majority, 764 to 192 for his opponent, Walter B. Jennings, W0YQA. William P. Sides, W4AUP, continues as alternate of the Southeastern Division, 406 votes to 307 for Alpheus Stakely, W4FKE, and Henry W. Wickenhiser, W3KWA, was returned
as alternate of the Atlantic Division, 927 to 644 for Samuel J. Thackeray, W3IU.
Interest in ARRL elections continues high; in
those divisions electing directors, 57.2% of the
eligible members used their ballots. The figures by divisions:
Atlantic *...................
38.9%
Dakota......................................................................................68,0%
Delta..........................................................................................63.1%
Great Lakes.......................
49.6%
Midwest................................................................................... 51.4%
Pacific........................................................................................60.0%
Southeastern....................................
60.8%
Canada..........................................
63.4%
* Alternate election only.
NOTICE OF SPECIAL ELECTION To All Full Members of the American Radio Relay League Residing in the Roanoke Division:
A special election is about to be held in the Roanoke Division to choose an alternate director to fill the unexpired term of J. Frank Key, W4ZA. Nomination is by petition, which must reach the Headquarters by noon of January 20, 1950. Nominating petitions are hereby solicited. Ten or more Full Members of the Roanoke Divi sion may join in nominating any eligible Full Member residing in the Division as a candidate for alternate director therefrom. Suggested form:
Executive Committee The American Radio Relay League West Hartford 7, Conn. We, the undersigned Full Members of the ARRL
residing in the Roanoke Division, hereby nominate.................... .................. .. of ............................................. as a candidate for alternate director from this division for the unexpired remainder of the 1949-1950 term.
(Signatures and addresses)
See the election notices appearing in August and September QST for additional details on standard election procedures and eligibility of candidates, or write the Headquarters for a copy of the Constitution and By-Laws; a copy will be sent to any member upon request. If on January 20th there is but one eligible nominee, he will be declared elected. If there is more than one nomi nee, ballots mH be sent to Full Members of the division the first week in February. Members of the division are urged to take the initiative and file petitions promptly.
For the Board of Directors: October 15, 1949
A. L. Budlong, Secretary
VOICE OF AMERICA
Have you heard the Voice of America's weekly program devoted entirely to amateur radio? Prepared with the cooperation of ARRL, it is broadcast twice each Sunday on several fre quencies beamed to various parts of the world.
The first airing of the 15-minute program, beamed to the Latin Americas and the Far East, is at 8:45 a.m. EST and is transmitted from various points in the United States on these frequencies: 6060, 6185, 9515, 9570, 9750 and
January 1950
29
11,730 kc. The rebroadcast is beamed to Europe at 2:15 p.m. EST on 9690, 11,790, 15,250, 15,270, 17,780, 21,500 and 21,650 kc. Each of these programs is relayed either in the Far East or in Europe on various frequencies for additional coverage. We think you'll find them excellent listening.
EXAMINATION SCHEDULE
The Federal Communications Commission will give amateur examinations during the first half of 1950 on the following schedule. Remember this list when you need to know when and where examinations will occur. Where exact dates or places are not shown below, information may be obtained, as the date approaches, from the Engineer-in-Charge of the district. Even stated dates are tentative and should he verified from the Engineer as the date approaches. No examinations are given on legal holidays. All examinations be gin promptly at 9 a.m. except as noted.
Albuquerque, N. M.: April 5. Amarillo, Tex.: April 3. Anchorage, Alaska, 53 P.O. & Courthouse: By appointment. Atlanta, Ga., 411 Federal Annex: Tuesday & Friday at
8:30 a.m. Bakersfield. Calif.: Some time in February. Baltimore 2, Md., 508 Old Town Bank Bldg.: Monday
through Friday. When code test required, at 8:30 a.m. Bangor, Me.: Some time in April. Beaumont, Tex., 329 P.O. Bldg.: Thursday and by appoint
ment. Rillings, Mont.: April 29. Birmingham, Ala.: Jan. 6 and April 7. Bismarck, N. D.: April 12. Boise, Idaho: Some time in April. Boston, Mass., 1600 Customhouse: Monday through
Friday, 8:30 a.m. Buffalo, N. Y., 328 P.O. Bldg.: Thursday. Butte, Mont.: April 27. Charlestown, W. Va.: Some time in March and June. Chicago, 246 U. S. Courthouse: Friday. Cincinnati: Some time in Feb. and May. Cleveland, Ohio: Some time in March and June. Columbus, Ohio: Some time in Jan. and April. Corpus Christi, Tex.: Mar. 16 and June 15. Cumberland, Md.: April 20. Dallas, Tex., 500 U. S. Terminal Annex Bldg.: Monday
through Friday. Davenport, Iowa: Some time in Jan. and April Denver, Colo., 521 New Customhouse: 1st and 2nd Thurs
days and by appointment. Des Moines, Iowa: Jan. 12 and April 6. Detroit, Mich., 1029 Federal Bldg.: Wednesday and Friday. El Paso, Tex.: April 7. Ft. Wayne, Ind.: Some time in Feb. and May. Fresno, Calif.: March 15 and June 14. Grand Rapids, Mich.: Some time in Jan. and April. Hartford, Conn.: Some time in March. Hilo, T. H.: April 11. Honolulu, T. H., 609 Stangenwald Bldg.: Monday, 8:00 a.m. Houston, Tex., 324 U. S. Appraisers Stores Bldg.: Tues, and
Fri. Indianapolis, Ind.: Some time in Feb. and May. Jacksonville, Fla.: April 8.
Juneau. Alaska, 6-7 Shattuck Bldg.: By appointment.
Kansas City, Mo., 3200 Fidelity Bldg.: Friday, 8:30 a.m.; also by appointment.
Klamath Falls, Ore.: Some time in May. Knoxville, Tenn.: March 8 and June 7.
Las Vegas, Nev.: Some time in April. Lihue, Kauai, T. H.: April 18.
Little Rock, Ark,: Jan. 18 and April 19.
Los Angeles, 539 U.S.P.O, & Courthouse Bldg.: Wednesday
9:00 a.m. and 1:00 p.m.
Memphis, Tenn.: Jan. 10 and April 11.
Miami, B'la., 312 Federal Bldg.: Monday and Thursday.
Milwaukee, Wis.: Some time in Jan. and April.
Mobile, Ala., 324 U. 8. Courthouse and Customhouse:
Wednesday and by appointment.
Nashville, Tenn.: Feb. 8 and May 10.
New Orleans, La., 400 Audubon Bldg.: Monday through
Friday, except Monday through Wednesday at 8:30 a.m.
when code test required.
New York, 748 Federal Bldg.: Monday through Friday.
Norfolk, Va., 402 Federal Bldg.: Monday through Friday,
except Friday only when code test required.
Oklahoma City, Okla.: Jan. 19-20 and April 20-21.
Omaha, Nebr.: Jan. 19 and April 13.
Philadelphia, 1005 U. S. Customhouse: Monday through
Friday.
Phoenix, Ariz.: Some time in April.
Pittsburgh: Some time in Feb. and May.
f
Portland, Me.: Some time in ApriL
Portland, Ore., 307 Fitzpatrick Bldg.: Friday, 8:30 a*m.
Reno, Nev.: April 19.
Roanoke, Va.: April 1.
St. Louis, Mo.: Feb. 9 and May 11.
St. Paul, Minn., 208 Uptown P.O. Bldg.: Friday.
Salt Lake City, Utah: Mar. 15 and June 14.
San Antonio, Tex.: Feb. 9 and May 18.
San Diego, 230 U. S. Customhouse: By appointment.
San Francisco, 323-A Customhouse: Monday and Friday,
8:45 a.m.; also, Class A Monday through Friday.
San Juan, P.R., 323 Federal Bldg.: Thursday; and Monday
through Friday at 8:00 a.m. if no code test required.
Savannah, Ga., 214 P.O. Bldg.: By appointment.
Schenectady, N. Y.: Mar. 8-9 and June 7-8 (exams at 1:00
p.m. and 7:00 p.m.) .
Seattle, 808 Federal Office Bldg.: Friday.
Sioux Falls, S. D.: Mar. 8 and June 14.
Spokane, Wash.: April 25.
Syracuse. N- Y.: Some time in Jan. and April.
Tampa, Fla., 410 P.O. Bldg.: By appointment.
Tucson, Ariz.: Some time in April.
Tulsa, Okla.: Jan. 23 -24 and April 24-25.
Washington, D. C., 415 22nd St., N. W.: Monday through
Friday, 8:30 a.m.
Wichita, Kans.: March 9.
Williamsport, Pa.: Some time in March and June.
Wilmington, N. C.: June 3.
Winston-Salem. N. C.: Feb. 4 and May 6.
In the Matter of
1
Amendment of Part 12 I
of the Commission's /Docket No. 9295
Rules Governing
I
Amateur Radio Service /
Further Notice of Proposed Rule Making and Notice of Provisional Designation for Oral Argument
I. Notice is hereby given of further proposed rule-making in the above-entitled matter. Notice is also given that the above-entitled matter is hereby provisionally designated for general oral argument to be held in Washington, D.C., at a time to be later announced.
2. On April 21, 1949, the Commission released a Notice of Proposed Rule Making in this matter. Numerous com ments were received with regard thereto from individual amateurs and amateur organizations. In addition, a request was received from the American Radio Relay League that the matter of the proposed rules be designated for oral argument "as a prerequisite to complete and proper resolu tion of the problems presented." On October 10 and 11, 1949, an informal conference between members of the Commission's staff and all interested parties was held, in order to discuss the form and substance of the proposed rules. As a result of the comments referred to and the dis cussions which occurred at the informal conference, the Commission has concluded that it would be in the public
30
QST for
interest to modify the form and substance of the original proposals in this matter in a manner which is believed will be found to be generally acceptable to the amateur fraternity. However, in view of the request for oral argument hereto fore made in this rule making proceeding by the American Radio Relay League, it is deemed appropriate to designate the matter of the proposals herein made for general oral argument unless it is clearly apparent from the comments filed on the proposals herein made that general oral argu ment is not desired by any interested parties.
3. The modified proposal is set forth in an appendix attached to this Notice. Authority to issue this proposal is contained in Sections 4(i) and 303(b)(c)(g)(1) and (r) of the Communications Act of 1934, as amended.
4. As above indicated the date for oral argument, if one is to be held, will be announced in a future notice. All in terested parties may participate in such argument if and when it is held. In regard to the rules proposed herein in terested parties may submit comments or briefs in writing until January 16, 1950. Such briefs or comments may be either in opposition to or in support of the rules proposed herein. An original and four copies of such briefs or com ments shall be furnished the Commission. Adopted: November 16, 1949
Federal Communications Commission T. J. Slowie, Secretary
APPENDIX
PART 12 -- Rules Governing Amateur Radio Service, is amended as follows:
A new section 12.0 is added to read as follows: § 12.0 Basis and Purpose. -- These rules and regulations are designed to provide an Amateur Radio Service having a fundamental purpose as expressed by the following princi ples: (a) Recognition and enhancement of the value of the amateur service to the public as a voluntary non-commercial communication service, particularly with respect to provid ing emergency communications. (b) Continuation and extension of the amateur's proven ability to contribute to the advancement of the radio art. (c) Encouragement and improvement of the amateur radio service through rules which provide for advancing skills in both the communication and technical phases of the art. (d) Expansion of the existing reservoir within the ama teur radio service of trained operators, technicians and electronics experts. (e) Continuation and extension of the amateur's unique ability to enhance international good will.
Section 12.111(a) is amended in the following particulars: 1. Subparagraph (ii) of paragraph (9) is amended to read as follows: (ii) 3800 to 4000 kc, using type A3 emission and, on fre quencies 3800 to 3850 kc, using narrow band frequency or phase modulation for radiotelephony, to those stations lo cated within the continental limits of the United States, the Territories of Alaska and Hawaii, Puerto Rico, the Virgin Islands and all United States possessions lying west of the Territory of Hawaii to 170° west longitude, subject to the further restriction that type A3 emission, or narrow band frequency or phase modulation for radiotelephony, may be used only by an amateur station which is licensed to an amateur operator holding an Amateur Extra Class or Ad vanced Class license and then only when operated and con trolled by an amateur operator holding an Amateur Extra Class or Advanced Class license.
9. Paragraph (4) is amended to read as follows: (4) 14000 to 14400 kc, using type Al emission and, on frequencies 14200 to 14300 kc, type A3 emission and, on frequencies 14200 to 14250 kc, using narrow band frequency or phase modulation for radiotelephony, subject to the re striction that type A3 emission, or narrow band frequency or phase modulation for radiotelephony, may be used only by an amateur station which is licensed to an amateur oper ator holding an Amateur Extra Class or Advanced Class license and then only when operated and controlled by an amateur operator holding an Amateur Extra Class or Ad vanced Class license:
·5. Paragraph (6) is amended to read as follows: (6) 28.0 to 29.7 Me. using type Al emission and, on fre quencies 28.5 to 29.7 Mo using type A3 emission and narrow band frequency or phase modulation for radio-telephony and on frequencies 29.0 to 29.7, using special emission for fre^ quency modulation (radiotelephone transmissions and radiotelegraph transmissions employing carrier shift or other frequency modulation techniques).
4. Paragtaph (7) is amended to read as follows: (7) 50.0 to 54.0 Me, using types Al, A2, A3 and A4 emission and narrow band frequency or phase modulation for radiotelephony and, on frequencies 52.5 to 54.0 Me, special emission for frequency modulation (radiotelephone transmissions and radio telegraph transmissions employing carrier shift or other frequency modulation techniques).
Section 19.114 is amended in the following particulars: 1. Paragraph (6) is deleted. 9. Paragraph (c) is amended to read as follows: (c) The use of narrow band frequency or phase modula tion is subject to the conditions that the band-width of the modulated carrier shall not exceed the band-width occupied by an amplitude-modulated carrier of the same audio characteristics, and that the purity and stability of such emissions shall be maintained in accordance with the re quirements of § 12.133 of these rules.
A new section 19.90 is added to read as follows: § 12.20 Classes of Amateur Radio Operator Licenses.1 Amateur Extra Class
Advanced Class
(Previously Class A)
General Class
(Previously Class B)
Conditional Class
(Previously Class C)
Technician Class
Novice Class
1 Footnote to Section 19.20
Amateur Extra Class. -.... This new class of operator li cense will become available to qualified applicants January 1, 1951.
Advanced Class. -- This class of amateur operator license is the same as the Class A with change in name only. It (and the Class A) may be renewed as long as the holder to whom it was issued meets the renewal requirements current at the time renewal is applied for. New Advanced Class (or Class A) amateur operator licenses will not be issued after De cember 31, 1951.
Technician Class and Novice Class. -- These classes of licenses are new and will become available to qualified ap plicants January 1, 1951.
Se.etwn. 12.91 is amended to read as follows: § 12.21 Eligibility for License. -- Persons are eligible to apply for the various classes of amateur operator licenses as follows: Amateur Extra Class. -- Any citizen of the United States who at any time prior to receipt of his application by the Conamission has held for a period of two years or more a valid amateur operator license issued by the Federal Com munications Commission, excluding licenses of the Novice and Technician Classes. Advanced Class. -- Any citizen of the United States who at any time prior to receipt of his application by the Com mission has held, for a period of a year or more an amateur operator license issued by the Federal Communications Commission, excluding licenses of the Novice and Tech nician Classes. New Advanced Class amateur operator licenses will not be issued after December 31, 1951. How ever, valid Advanced Class (or Class A) licenses outstanding January 1, 1952 may be renewed as set forth in § 12.27. General Class. -- Any citizen of the United States. Conditional Class. -- Any citizen of the United States whose actual residence and amateur station location are more than 125 miles air line distant from the nearest loca tion at which examinations are held at intervals of not more than 3 months for General Class amateur operator license; or who is shown by physician's certificate to be unable to appear for examination because of protracted disability; or who is shown by certificate of the commanding officer to be in the armed forces of the United States at an Army, Navy, Air Force or Coast Guard station and, for that reason
(Continued on page 108)
January 1950
31
An RC-Type Audio Signal Generator
Its Construction, and a Calibration Process Using Lissajous Figures
BY RICHARD M * /SMITH, W1FTX
Fob ham purposes, an audio signal generator should meet the following requirements: (1) It should be possible to build the unit with out expensive hard-to-get parts, and to do all of the work with the simple hand tools available in the average ham shack. (2) It should be tuna ble over that portion of the audio spectrum used either in actual ham communication or in testing gear built for ham communication -- in other words, from about 30 to 15,000 cycles. (3) It must have nearly-constant output over its entire range, and that output must be sine wave. (4) The output voltage should be at least that re quired to simulate the output of the type of mi crophone used in ham equipment; i.e., a volt or so across either low- or high-impedance loads.
Front view of the audio signal generator. The entire unit, including power supply, is housed in an 8X10X 7-inch cabinet. The output jacks, main tuning dial, power switch-volume control and range switch that permits output to be varied from 30 to over 18,000 cycles are arranged on the panel.
This may sound like a rather large order but in reality it is not difficult to meet all of these requirements in a unit that is both easj' to build and light on the pocketbook. The circuit diagram, shown in Fig. 1, is certainly not complex, nor is the construction, shown in the photographs, difficult. In performance, the unit compares very favorably with commercially-built gear, and be
* Technical Assistant, QST. 1 For a complete discussion of RC oscillators see Terman, Radio Engineering, 3rd ed,, p. 436.
cause readily-available parts are used, the cost is low.
The Circuit
The circuit uses triodes throughout. The two sections of a 6SN7GT are used as a resistance capacitance oscillator and a 6J5 is used as a simple voltage amplifier to isolate the output terminals from the oscillator circuit and to deliver either high- or low-impedance output. As a matter of convenience, the power supply for the unit is constructed on the same chassis as the rest of the circuit.
The RC oscillator circuit*1 has become almost standard for use in audio oscillators, primarily because it has the advantage of providing good waveform and substantially-constant output over a wide range of frequencies, under widely varying conditions. The frequency of oscillation is determined by the network of resistors and the large variable condensers in the grid circuit of the first section of the 6SN7GT. The output is held constant by using an ordinary dial lamp, Zj, as a regulating resistor. This lamp, along with wire-wound potentiometer Ziin, constitutes a volt age divider that applies negative feed-back to the oscillatory circuit. The potentiometer is used to set the negative feed-back at a point where the circuit will just oscillate, because it is at this point that the waveform is best. The positive feed-back required to start and maintain the oscillation is supplied through the RC networks mentioned above.
Output from the oscillator is taken across the cathode resistor, R^, of the second section of the 6SN7GT, and is applied, through a large capac ity, Ct, and the volume control, R<n, to the grid of the 6.15 voltage amplifier. The remainder of the 6.15 circuit is arranged so that output may be taken from the cathode circuit across Ra or from the plate circuit across j826. Shorting-type output jacks are used so that when one output circuit is not in use it is suitably by-passed by either Cr
or Cs. The power-supply circuit is in no way unusual,
although some pains were taken to insure good filtering and shielding to eliminate the danger of pick-up of 60-cycle hum by the oscillator and amplifier circuits. The slight additional work involved pays dividends because the hum content of the output is negligible.
32
QST for
Fig. 1 -- Schematic diagram of the audio signal generator.
Ci -- 450-/iAtfd.-per-section dual variable. C2, C3 -- 180-gjufd. compression trimmers.
C4» Cs --2O-/ifd. 450-volt electrolytic.
Cs -- 0.04«^fd. 400-volt paper.
Cs, C7 -- 50-/xfd. 25-volt electrolytic.
Cg, Cio -- 8-^fd. 450-volt electrolytic.
Cu -- I6-Mfd. 450-volt electrolytic.
Ri, R2-- 8.2 megohms,
w * att.
R3, R4 -- 1.5 megohms,
watt.
Rs, Ro -- 2.2 megohms,
w * att.
R7, Rs -- 0.22 megohm, ^2 watt.
Rg, Rio -- 0.56 megohm, J g w * att.
Ru, R12 --· 0.1 megohm, F2 w * att.
Rts, R14--0.18 megohm, ^2 w * att.
Ris, Rio -- 22,000 ohms,
w * att.
R17, Rib --- 56,000 ohms, H w * att.
R19 -- 5000-ohm wire-wound potentiometer.
R20 -- 47,000 ohms, 1 watt. R21 -- 1 megohm, ^2 watt. R22 -- 1000 ohms, 1 watt. R23--'22,000 ohms, 1 watt. R24 -- I-megohm potentiometer, audio taper. R25 -- 1500 ohms, 1 watt. R26 -- 56,000 ohms, 1 watt. R27 -- 10,000 ohms, 1 watt. Ras -- 60,000 ohms, 20 watts.
* Resistance tolerance * 10%. Li -- 9 hy., 50 ma. (Stancor C-1215). Ii -- 4-watt 115-volt lamp. Ji, J2 -- Shorting-type microphone jack (Amphenol
75-CLPC1M). Si -- 2-section 2-pole 5-position ceramic. S2 -- S.p.s.t. snap switch (attached to R24). Ti -- 325-0-325 v., 40 ma.; 5 v. c.t., 3 amp.; 6.3 v. c.t.,
2 amp. (Stancor P-6010).
Construction As shown in the photographs, the unit is housed in a standard steel cabinet which encloses a 7 X 9 X 2-inch chassis. The arrangement of most of the components is self-evident from the photo graphs. The components of the power supply, with the exception of the bleeder resistor 7?28i are mounted behind a shield partition that extends across the bottom of the entire chassis. Resistors Ri through /¿is, which are used in the frequency-determining
circuit, are mounted on the terminals of the ceramic range switch. Other parts are grouped about the tube sockets; their placement is not critical. All heater wiring, and the wiring to the a.c. switch on the back of the volume control, as well as the leads to the potentiometer itself, is made with shielded wire to reduce the chances of hum pick-up.
Good insulation is required in mounting both the main tuning condenser and the other com ponents of the RC networks in the grid circuit.
January 1950
33
This keeps the leakage resistance to ground high and avoids subsequent changes in the calibration. Using a ceramic switch for Sj and ceramic button insulators to support the tuning condenser should do the job.
About the only tricky part in the wiring is the fitting of the numerous resistors used in the RC network across the switch contacts. The actual resistance values required are not available in single units so series-connected pairs are used. A few words about these resistors are in order at this point. It is important that the resistance in one arm of the network be made equal to that in the opposite arm. For example, the sum of Ri and Rs must equal the sum of Ri and Ri, and so on for all of the five positions of the range switch. If you cannot get close-tolerance resistors it will be necessary to match the individual pairs by measuring a number of resistors until two of nearly identical resistance are obtained for each pair required. We merely picked resistors at ran dom from a supply of 10 per cent tolerance units, and found it necessary to change only one pair before we w'ere through. Don't mount these re sistors too securely at first; you may have to change them when you calibrate the unit.
Adjustment
The problem of adjustment and calibration consists of the following major steps: (1) getting the unit to oscillate over the full tuning range of each position of the range switch, (2) getting the unit to oscillate as described in (1) above without having to readjust the feed-back potentiometer when changing from one range to another, (3) setting the low-frequency limit of the oscillator, (4) adjusting the tuning "overlap" between ranges to produce the greatest possible frequency coverage, (5) actual calibration.
Steps 1 and 2 above are important in insuring smooth operation and good waveform, and must be performed, in the order named, before you tackle the remaining portion of the calibration job. The equipment needed to perform Steps 1 and 2 is nothing more elaborate than a pair of headphones, but an oscilloscope, a small filament transformer, and a receiver capable of tuning to
WWV are needed for Steps 3, 4 and 5. Even if you can't beg, borrow or steal a 'scope for an evening or two to get an exact calibration of the unit, you will still have a useful piece of gear after performing Steps 1 and 2, because the ac tual tuning range will be close to the nominal
ranges shown below:
'Range
Frequency
1 25 to 100 cycles
2 100 to 400 cycles
3 400 to 1600 cycles
4 1600 to 6400 cycles
5 6400 to over 18,000 cycles
You can get a rough calibration of Ranges 1, 2 and 3 by direct comparison with the notes on a piano. Charts showing the frequency of the vari ous notes on the piano are available,2 and it is a simple matter to zero-beat the output of the generator (working into headphones or a small 'speaker) with the notes of the piano. The use of the oscilloscope will be found to be more satis factory, however, especially for the high range.
Connect a pair of headphones to the highimpedance output jack through a microphone connector (the shorting-type jack has to be opened by the microphone connector) and turn the range switch to Position 3. Set the volume control about halfway open. Set the main tuning condenser and trimmers Ci and Cs at maximum capacity. If a tone is not heard when power is applied, turn the feed-back potentiometer, /¿m. Set this control at the point whore oscillation just starts. Failure to oscillate regardless of the adjust ment of Rw can be caused by capacity imbalance, or by "mismatch" in the resistors in the RC net work' -- probably the latter.
Once oscillation is established, turn the main tuning condenser over its range to be sure that oscillation will be sustained throughout the range. If it quits part way through, it is because of un balance in the tuning capacitance, and readjust ment of either Ci or Cs should rectify the con dition.__________________________________
s The Radio A* mateur 9 Handbook, 1949 ed., p. 548.
Bottom view of the audio signal generator. The powersupply components are separated from the rest of the circuit by a shield partition running across the full width of the 7 X 9 X 2-inch chassis. The ceramic range switch which supports the resistors used in the RC networks is mounted to the left of center on the front, with the combined a.c. switch and volume control on the right. The 4-watt lamp used to regulate output voltage of the oscillator can be sceu just to the left of the range switch, where it is supported by the terminals <»f the oscillator tube socket.
QST for
Part 2 of the adjustment process is also simple. If you find that a different setting of the feed-back potentiometer is required when changing from one range to another, the difficulty is probably caused by unbalance in the resistance values in the RC network. The greater the unbalance, the less negative feed-back the oscillator can stand. Thus, determine which of the five ranges shows unbalance by setting the potentiometer at the point where oscillation is just barely sustained in one range, turn the range switch to another range, and see if more, or less, feed-back can be used. Find, in this manner, which range is your best; i.e., which range has the best match of its resistances, and then strive to make the other ranges as well balanced. This can be done by se lecting resistors, if a good supply is available, but should not be necessary if 10 per cent (or closer) tolerance units were used in the first place. It should be possible to arrive at a condition where the "critical" setting of the feed-back potentiometer is about the same for all positions of the range switch.
To observe the waveform, you'll need that 'scope we mentioned earlier, but if you can't get one, you can rely, to a certain extent, upon your ears to tell you if any harmonic distortion is pres ent. If it is, you'll hear what seems to be a com plex tone, with a little fuzz on it, instead of the pure, piercing tone of a sine wave. If distortion is present, readjustment of R^ is called for.
In actual use it is possible to get as much as 50 volte undistorted output across a 10,000-ohm load from the high-impedance output terminal, and several volte across a 1000-ohm load from the
low-impedance jack. In cases where an extremely low-impedance load is used, such as the primary of a microphone transformer, the output voltage falls somewhat below a volt. This difficulty can be overcome by using another similar transformer as a step-down device from the high-impedance output terminal. As much as 20 volte across a 100-ohm load can be obtained in this manner.
Calibra tian
If you live in an area where reliable 115-volt a.c. power is available, and where you can get a good signal from WWVon your receiver, .you are. already equipped with the best in the way of standards to use in the calibration. For most ham purposes the dial shown will be entirely satis factory, but if precision work is contemplated, a more expensive unit may be used.
The calibration process requires the use of an oscilloscope on which you can compare the out put of the oscillator and a voltage from the known frequencies supplied by the available standards, which are the 440- and 4000-cyele tones transmitted from WWV, and the frequency of the line voltage supplied by your power com pany (in most cases 60 cycles). The comparison of the two audio voltages is accomplished by
connecting the output of the unit to the vertical amplifier of the 'scope, and applying the voltage from the frequency standard to the horizontal amplifier. The images which result are called Lissajous figures, and may be used to determine accurately the ratio between the unknown fre quency and the standard. For example, the pat tern that results from placing a 60-cycle signal on the horizontal plates and a 120-cycle signal on the vertical plates is a figure 8 on its side, as shown in Fig. 2B.3 To put a 60-cycle signal on the horizontal plates, connect the secondary of a small filament transformer between the horizon tal input terminal of the 'scope and ground, ap plying 115 volte a.c. to the primary. With the output of the audio generator connected to the
Fig. 2 -- Some examples of the Lissajous figures that
are used in calibrating the uuit. Their interpretation is discussed in the texL Other patterns encountered in the calibration are displayed in Fig. 3.
vertical input terminals of the 'scope, set the range switch to Position 2 and turn the main timing dial until the horizontal figure 8 appears on the screen. Note that as you approach the correct dial setting, the pattern will be revolving rapidly, gradually slowing down until, at one setting, the pattern will stand still. If you con tinue tuning past this point, the pattern will start to revolve in the opposite direction. Thus you can tell whether you are on the high- or low-frequency side of the correct setting. If the figure 8 seems to be elongated in one axis or the other, it is be cause you have the gain of one amplifier of the 'scope set too high. If one portion of the figure 8 seems flattened, distortion is present in either the output of the audio generator or in the signal being obtained from the standard. Needless to say, you should suspect your generator of being at fault before you accuse the power company of delivering lopsided waveform! Readjustment of feed-back potentiometer R^ may be required.
It will pay you to play around with the com bination you now have to familiarize yourself
3 The patterns shown here are those produced when a 90° phase relationship exists between the two voltages. They are easier to recognize than the patterns produced for other phase relationships. See Electrical Engineer's Handbook, Pender and McIlwain, 3rd ed., p. 10-07; also Modern Os cilloscopes and Their Uses, Kinter, p. 137.
January 1950
35
with other Lissajous figures a bit before proceed ing with the actual calibration. With a little
practice you will find that you are soon able to recognize the various patterns almost immedi
ately. Examples of some of the combinations to be encountered are shown in Eigs. 2 and 3. To take one particular case and follow it through, look
at Eig. 2C. This represents a frequency ratio of 3:1. In other words, the frequency of the unknown signal is 3 times that of the standard. Note that there are 3 peaks intersecting the horizontal axis, and just one gradual curve across the vertical. The pattern for a 4:1 ratio is similar, except that there are four peaks instead of three. In both
36
QST for
cases described above, note that the frequency of the unknown is greater than that of the standard. In cases where it is less than that of the standard, the larger number of peaks will be on the vertical axis, as in Fig. 2E. More complex ratios are also possible. For example, see Fig. 2D. This is the pattern obtained for a 5:4 ratio.
By simple arithmetic the frequency of the unknown is found as follows:
Vi
where IV = the number of peaks on the horizon tal axis, S = the known frequency (60 cycles), and IVi = the number of peaks on the vertical axis.
Thus:
/,,' =5 X---60... = cycl.es.
good you should have no trouble in recognizing
the Lissajous patterns. For frequencies above 2000 cycles use the 4000-cycle tone on the WWV higher-frequency transmitters, tuning the re ceiver to the point where the 4000-cycle tone sounds louder than the 440-cycle tone.
Once the proper overlap between ranges has been established you can proceed with complete calibration of the individual ranges. Calibrate the low-frequency range first because the 60-cycle
In cases where a standard other than 60 cycles is used, <8 is changed to agree with the standard (440 or 4000 in the case of WWV, 50 in areas where 50-cycle power is used).
You are now ready to proceed with Step 3 of the procedure, setting the low-frequency limit of the generator. Turn the range switch to Position 1, and with the 60-cycle standard frequency ap plied to the horizontal plates of the 'scope, turn the dial on the generator toward maximum ca pacity until you get a pattern that looks like a figure 8 (Fig. 2E), indicating a ratio of 1:2, the pattern for 30 cycles. If you can't reach 30 cycles add resistance to each of the two arms of the RC network used for the low-frequency range. The initial resistance in this case is 9.7 megohms (Ri plus Rs) and it takes a fairly large additional re sistance to lower the frequency more than 5 or 10 cycles. Add about a half megohm at a time to each branch, remembering that the added re
sistors must also be "matched." By trial you can soon find the value that will permit the oscillator to be tuned to 30 cycles (or a trifle less) at maxi mum capacity.
Once the low-frequency limit of the oscillator is set, determine the actual tuning range with the switch set at Position 1. Depending upon the tuning condenser used and the stray capacities, you will be able to cover a 3JX- or 4-to-l fre quency range. In the unit shown here the low range covers from about 28 cycles to 102 cycles, which is a bit better than 3.6 to 1. Once you know your tuning ratio, you can decide on the approxi mate amount of overlap that you can tolerate. The overlap between the other ranges is adjusted by the same means, but in each succeeding case the amount you change the resistance will be less.
When you start working into the ranges above 400 cycles, it will be advantageous to use the 440-cycle tone from WWV as the standard fre quency. This voltage can be taken directly from the 'phone jack in your receiver; if the signal is
Rear view of the audio signal generator. The 6SN7GT
oscillator tube is at the left, the 6.15 voltage amplifier
on the right, and the 5W4 rectifier in the center near
the power transformer. The main tuning condenser and the ceramic trimmers are visible in the center. The
feed-back control is mounted so that its shaft can be
reached from the top, immediately behind the tuning
condenser.
standard will be less apt to be obscured by noise, than a signal taken off the air. Fig. 3 is a sample calibration curve, prepared for the equipment described here. Note that the points plotted are at 30, 40, 45, 48, 60, 75, 80, 90 and 100 cycles. Other points in the range also will produce Lissa jous patterns, but those shown are the simplest and therefore easiest to use.
Once the low-frequency range is calibrated the curve connecting the plotted points should be smooth, like the one illustrated. If one or two points don't fall where the general shape of the curve indicates that they should, the Lissajous pattern for those particular points should be reexamined.
Calibration of the higher ranges is carried out in exactly the same manner, using the 440- and 4000- cycle standards. The curve for each range should resemble the first because the shape is al most entirely dependent upon the construction 'of the tuning condenser.
January 1950
37
the Air v/'
He built his 20-kc. sideband filter from cores that W3BOL found in a junk yard, with a junk-box collection of miniature and octal tubes and a few
ideas from the W0TQK article. The rig ends up
SINGLE
on 75 with a pair of 811s running 350 watts on peaks.
SI PE BAND The dope on VE2SA, Gordon Waugh of Ver dun, is that a 75-meter phasing job is used, pat
terned after that of W6CEM but with 6L6s
The purpose of this column is to report schedules and substituted for the 4-65As. He can get about 50 operating times of active single-sideband stations, describe watts into it on peaks, and usually drives a pair
operating experiences and sometimes the gear in use, and possibly discuss some of the practical operating problems and suggested solutions. Contributions from active single sideband stations will be welcomed.
of 813s to about 400 watts peak. He first got on the air on April 12, 1949, and the first two-way s.s.b. VE QSO was with VE2W on April 16th.
Plagued with BCI trouble, Gordon generally
All of the new ones this month are east of the raises stations on n.f.m. and then switches to Mississippi, which makes us wonder if there s.s.b. for a short test. His experience has been is something about the west that makes it tough that the BCI with s.s.b. runs about the same as
to get a single-sideband rig going out there. After with a.m., with the only saving grace the fact
a sudden spurt at the start, the activity seems to that it is more difficult to identify! We would
be dying off.
expect the BCI to be about the same or slightly
Not so in. the east. .After mentioning that there less with s.s.b., depending upon circumstances,
were no W8s on the air with the stuff, we immedi but so different in nature that it would be hard
ately got word from W8ORD that it wasn't so. to assess its effect on the BCL. It looks like we To clinch it still more, Bob Mathews, W8CJG, need more experience along these lines. Ahem --
of Salem, Ohio, checks in with his report. The any volunteers? VE2SA is moving to a better
exciter is on 75 and patterned after the W2UNJ location (less chance of BCI) so he will be unable
phasing unit, driving a pair of 4-25OAs at any to continue his BCI tests but will have more where from 250 to 800 watts peak. A YRS-l on time for s.s.b.
the NC-240-D receiver helps out on receiving, so W1GR has hopped up his rig and now runs 600
it looks as though Bob is taking full advantage of watts peak to a pair of 304TLs on either 75 or 20.
single-sideband techniques. He says, "I got as DX there is DL4PA and KH60Z, both raised on
big a thrill working single sideband as I did hear s.s.b. The KH6 said he was amazed to hear a W1
ing my first radio signal (NAA) in 1916, using a coming right through the 89 W6s. Al says the
crystal detector and an antenna loading coil."
activity is increasing rapidly on both 3.9 and 14
(Jari Thrasher, W2SAS, is on 75 in Farmington, Me., and it's getting so he hears a new s.s.b. sta
N. J., with a W2UNJ exciter driving an 829B to tion almost every evening. Actually that's no
125 watts on peaks. His letter merits almost a exaggeration, if you change it to read ``every
complete quote, we think: ". . . Needless to say, other evening."
I am enjoying s.s.b. and believe a.m. is out for W2LKN, Jack Heidt of Elizabeth, N. J., is on
me from here on in. My 450THs are stone cold 20 with a phasing rig patterned after the ``basic
and will remain so if the results this far on s.s.b. exciter" of a year ago. He is running about 75
continue to be so good. Have had the usual trou watts to a pair of TZ20s and has worked out to ble with frequency shift, overdrive, etc., but the West Coast and W9BVU. He hangs out nothing to it -- those things are easier to whip around 14,220 or 14,270 kc. evenings and week
with s.s.b. than on a.m., especially with the help of a swell bunch of s.s.b. men like W3ASW, W2UNJ, W2NJR, W1FAJ, W2SHN, W1SHN,
W3BOL and others." That W3BOL mentioned above is Harry
Hackerty of Bethlehem, Penna. He uses a filter rig a la W0MNN, ending up in a Class A 807 that
ends, and so far has found that not too many of the 20-meter 'phone gang seem acquainted
with s.s.b. Give Jack a shout and get him to change his opinion.
Shy of W4OLL has now built three rigs all told, two phasing and one filter, and says he prefers the filter job by a wide margin, because it isn't as
drives a pair of 4-125s. With 1500 volts on the troublesome. We imagine the discussion will con
plates, the peak input runs around 300 watts, but tinue for a long time, and we aren't taking sides the new power supply should permit about 700 at this time, not having decided yet whether one watts. Usual frequencies are 3999 and 3895 kc. gets out better with a Hartley or a Colpitts.
About s.s.b. Hack says, "I do not recall when I (Remember that one?) Shy also mentions one
have built a piece of radio equipment with which thing we'll pass on that isn't opinion, however, 1 had so much pleasure and head scratching in so it won't start any argument. lie says, "By the
getting into operation."
way, these guys who speak of complexity in
Another new one along similar lines is the single-sideband rigs please take note. Just counted
filter rig at W3QCM, Bill Huston at Philadelphia.
(Continued on page 114)
38
QST for
CONDUCTED BY ROD NEWKIRK,* W9BRD
How:
Just about now the antennae many W/VEs erected so hurriedly "before the cold sets in" are beginning to sag and snap in fine style. Numbers of neighbors are doubtless peering askance through frosty windows at muffled individuals seen high on roofs fumbling No. 14 splices with benumbed fingers. But perhaps they'll never understand. Neither will» you lucky guys per manently situated in tropical elimes!
Or could be we should be philosophical about the whole thing and adopt the viewpoint of the W7 who says, "Gosh, I like to fuss with skywires this time of year 'cause it feels so good to get back inside the shack again."
Reckon he wouldn't talk like that if he were a W9, though. Jeeves still can't get over the fact that here in the midwest a 40-meter folded dipole, becomes a 20-meter job in the wintertime.
Digressing from matters VE8 and KC4, how ever, let us indulge in a timely plea directed toward DX stations employing A3 emission. In the interests of lowering the prodigious QRM level caused by fruitless and inopportune calling of DX by W/VEs on the 'phono bands, it is ex tremely important that DX consistently indicate their tuning procedure when seeking answers to CQs and voice equivalents of "QRZ?". The recommended c.w. procedure as in CQ DX 75IJ DE VK9ML 75U K may be paralleled orally by "Answer 75 kilocycles up from my frequency, go ahead" when modulating. Or, at the least, a fairly specific indication of the band segment about to be immediately tuned should be given.
As W2TXB writes to point out, all this be comes doubly important during contest periods when activity is at peak. All DX operators are urged to bear these points in mind during the coming 16th ARRL DX Competition.
Still on the subject of A3, a few months ago we inadvertently gave the impression that there was something underhanded about submitting 'phone-to-e.w. cards for 'phone DXCC credit, and a few laid us out in luscious lavender for the thing. We hasten to correct the imprint. The facts of life being what they are, the DXCC rules require only that the submitted card show that the applicant was using 'phone at the time, and this leaves the door wide open, of course. The rule was made this way because no one so far has been able to devise a foolproof method for check-
ing cards to show whether the confirmation, is for
a pure 'phone-to-'phone QSO or the maligned half-breed contact. The Century Clubbers who utilize these latter to pyramid their 'phone totals are only taking honest advantage of the rules, and there should be no stigma attached to their work.
Now perchance the following gleanings may be used to set your sights for a new one or two. Give, Jeeves. . . .
What:
Eighty is still propagatin', according to KP4HU, Mac's
40-watter caught up with MD2G0 (3520t6), FA9RZ (VFO),
LU3EL (3512) and several ZS-men, while KH6PL (3510)
was heard. He further adds that MD7DC and HA4SA will
hit 3.5 Me., the latter with a new 300-watt outfit
MD2G0 gave W4BRB bis 63rd 80-meter country . --. --. --
Asia showed up on 80 in early December in the form of
TA3GVU- (3505). Fred made almost a dozen East Coasters
happy the first night.
Forty is always worth a peek this time of year. Mediter
ranean-area operators like the band evidently, as W1AQT
dug up ZB1AJX (7040) and KP4HU scored with MD7DC
(7045)
W1QMJ bumped into such as EA6AF,
EA8BC, IINU/Trieste, KG4AK, EK1A0, SV0WH,
GC2CNC, Y03RI, VP6WF and TI2BF while W9ANT cap
tured HR2HZ (7080), among others.
Receipt of the first KZ5 DXCC diploma hopped KZ5IP
up to the tune of AP2N (14,128), MP4BAD (14,020 t7),
KB6AJ (14,043), MD7MR (14,000 t8), HE1EU (14,020)
and VU2RX (14,020) on. twenty and W8SYC hooked VQ8AB
who told him he was leaving to put VQ8CB (14,100) on the
air in the Chagos. Clint also tallied HS1SS (14.140)
MP4BAL (14,099), who is also W6PBV, passed a pleasant
visit with VQ4ERR before heading for Bahrein to fire up his
6 V6-807 rig. Bob desires all cards via the listed address and
none to his Arabian QTH
Rather pancaked by the
* DX Editor, QST. Please mail reports of DX activity to W9BRD's home QTH: 1517 Fargo Ave., Chicago 26, Ill.
January 1950
39
interesting items like MF2AA, HZ1AB, HE1H Y, MP4BAE,
F9QU/FM8, FF8.FP, ZD Is FB, PW, 8V0WH and HA5BC
VQ4HJP interrupted a QSO with W0ARH in
order to chase a giraffe out of the front yard and quiet down
the dogs. Bob also added VQ5ALT, FE8AB and KH6VX/
KB6 (QSL % CAA, Canton Island)________ Found active
by HC2JR were CR9AG (28.250), ET3AF (28,343), PK5HL
(28,240), TF3SF (28,400), W2EJV/PK3 (28.410), ZD2S
(28,180). ZK1BZ (28,553), ZS3Z (28,294) and ZS9F
(28,157)_____. _ W2ZVS was still able to find some new
ones by way of GD3AGC, IlRC/Trieste, FQ8SN, TA3FAS,
HA5B and GC2ASO while W9HNI adds YV1AU and
HL1BJ
On continuous wave, W8YFJ has an in
triguing undercover claimant in LY1XX ("Sorry, no QSL'')
as well as GC5OIT, VQ4HJP, FA8IH, CN8MR and EK1FM
. _ ______VE3AFY fired up again after quite a layoff and
was greeted by c.w. proponents ST2AM, GC4LI, FA8CR
and CT1LZ, needing nothing more than a doubling 807 with
a folded dipole.
VK9s NR and RH on the scene at Norfolk Island. VK9RH, ex-ZL2FP, is now active on 7-Mc. c.w. with in tentions of joining the brawl on 14 Me.
bedlam surrounding FY8AA (14,004). VV2WZ still felt up to
chatting with FE8AB (14,053), LX1AS (14,035), PK2ZZ
(14,002), EA6EG (14,034), MD2PJ (14,001), MD4GC
(14,118), MD7DC (14,076), MP4BA (14,111), KR6AS
(14,030), ST2TC (14,008), SV7AA (14,018), SP5AC (14,045),
CR9AG (14,060), W9BRD (14,032) [Lower Slobovia, eh
Boss?--./ewesl, ZD3D (14,050 t8). ZB2I (14,061). ZS6OS/
ZS7 (14,052), XZ2FK (14,096), 4X4AU (14,014 t7), 4X4CJ
(14,050), VS6AC (14,059), VK1VU (14,092) and FN8AD
(14,106). Al is still half an element shy of a 3-element rotary
and we'U bet he leaves it as it is! . _ . _ . _ W4CEN sched
ules ZD4AM and has it that the latter is seeking VP fellers
on the band's low edge . _. ~ _ W0s UOX and PNQ are
hot after ZD8B (14,023) who is popping through around
0100 local time
Boy, everything happened to
W4CYY and all at once. JB salted down his lOOth-country
confirmation, got married, and found his location newly in
corporated inside the widening city limits of Belmont, N. C.
This'didn't keep the Owl from getting in telling blows on
PK6XG, UR4AF, AP2Y, FY8UD and ZD6DH, however
We are hearing of many casualties in the rotary
beam department of late, mostly due to the elements being
battered by the elements. But WSZZTs trouble is in the ro
tator division, leaving him with a fixed array. Miles is still
getting ids share, however, including his 120th, 4X4RE
(14,009), EA8BC (14,027), CT1AS (14,037) and VS6BO
(14,080) . --
W6ALQ hoisted anchor for a new QTH
(within DXCC distance, fortunately), trying it out on
ZE2KY, VR2BH and CR7BN while W6EYR ran across
EA6AF, UL7AB, 4X4CZ and was among the fortunate to
pick off FN8AD one crisp morn.
The 'phone situation isn't slack what with VT1RF
(14,165) in Kuwait as reported by VK7AZ, through HC2JR,
giving the gang a tumble. HC2JR also reports as active
ZK2AA (14,348), VR3A (14,131), CR5UP (14,186), FO8AD
(14,181) and 4X4AD (14,339).............. ZS8A, usually found
ou ten, hits twenty every Saturday night on about 14,310
kc., mentions W5JUF. John also notes a consistent signal
from VU2MA along the southern route plus contacts with
VQ8AX, VS7SN, VU2CQ, VQ4s AC and NSH_______
W2WZ found the n.f.m. stiff good for JA2EJ, DUls AP
(14,230) and WP (14,330)................... The birds took off from
W4BPD's rhombics because of VR4AC (14,200), VR3C
(14,245) and PZ1QM (14,070).
If the TVLb chop half your 14-Mc. beam down it's a cinch
to work on ten. Results on 'phone at W2VRE were grati
fying: LX1AI (28.486), FF8PG (28,394), MD2AC (28,290),
MI3SC (28,492), Y07WL (28,144), ZC6DZ (28,444),
ZD1PW (28.186) and ZS3O (28.438)________ W1EKU
completed his ZS-district collection with ZS9F and
ZS6OS/ZS7 (QSL to home QTH) and found available
Where:
This is as good a spot as^any for the yarn of this month and W8BRA (ex-9TWC) is the perpetrator. Seems as how Dave failed in four or five attempts to coax a card from KB6AD, mainly because of the latter being consistently on the move and snowed with QSLs to boot. Then one day W8BRA sent to the printer for some card samples, being in the market for a new design. You guessed it; one of the samples was a blank for KB6AD! Dave filled it out, sent it to KB6AD's Hawaiian QTH and got it back signed in a matter of days, as simple as thatSP5AC writes to W9CFT ennoftming the QSL Bureau of Poland at the ad dress listed for him later. It is not known whether cards for all SP stations are accepted and distributed but it may be worth a try if you have one hanging fire ------- - _ The
South African DX Contest
C.W. section from 0001 GCT Jan. 21st to 2359 GCT Jan. 22nd. 'Phone section from 0001 GCT Jan. 28th to 2359 GCT Jan. 29th.
Restricted to the 40-, 20-, and 10-meter bands, with crossband operation not allowed. Off-frequency operation will result in disqualification.
Serial numbers, which are different with each contact, are to be exchanged. For c.w. stations the serial number will consist of a 6-figure group -- the first three figures to be the RST report, the second three figures to be the last three figures of the serial number received from the station worked just previously. For the first contact simply add any three figures to the report given. For subsequent contacts give an RST report followed by the serial number of the last station worked. For 'phone sta tions the serial will consist of a 5-figure group -- the first two figures to be the RS report, the last three figures formed as in the case of c.w. stations.
Scoring as follows: 2 point® for each station worked in. your own country, 5 points for each sta tion worked in other countries (see ARRL list). The multiplier is the number of countries worked on all bands.
Each contestant to submit a logsheet which will have an analysis and the signed declaration, "I hereby declare that my station was operated strictly in accordance with the conditions and rules of this contest and I agree to abide by the decision of the President of SARL in the event of any dispute." Logsheets must show the following: Date, time of contact, band used, call sign, serials sent and re ceived, points claimed, multiplier, number of coun tries worked. Logs must reach H. R. Bennett, 47 Flower St., Pretoria, South Africa, by April 30, 1950.
Certificates to be awarded top scores in each country.
40
QST for
PK38J QTH listed is doing a rushing business for many PK3 entries. You might try it for some of your addressless ·Fava contacts -- with fingers crossed, of course.
EA6AF Bartolome Pina, Casa De Aspana Number 2,
Palma de Mallorca, Balearic Isles
EA8AN (QSL via W5A.TG)
FF8MH Maurice Henry, Poste Restante, Dakar,
F. W. A.
FF8PG Pierre Guillard, Post Box 165, Dakar, F. W. A.
FI8ZZ
P. Ferrand, Chef de Section du REF pour
L'lndo-China, Chemins de Fer, Saigon
FY8AA Rochambeau, Cayenne, French Guiana
HE1EU (QSL to HB9EU)
HE1HY (QSL to HB9HY)
HP1ET Box 2009, Balboa, Canal Zone
HP1WM Box 2041, Panama City, Panama
KG4AL Box 18, Navy 115, FPO, New York, N. Y.
MP4BAL Bob Leo, W6PBV. Box 11, Manama, Bahrein
Island, Persian Gulf
0Y2RD N. Storgaard Christensen, %
Wellejus,
Thorshavn, Faeroes Islands
PA1RCD Control Station Prinse, Vinperpark P.T.T., The
Hague, GM 15, Netherlands
PJ5RE (QSL via W5MMD)
PK3LC Radio Cotey, Soerabaja, Java, N.E.I.
PK3SJ
P. O. Box 222, Soerabaja, Java, N.E.I.
PY1CV (ex-PY6CV) J. A. Garnier Simoes, % Clube
Naval, 180 Ave. Rio Branco, Rio de Janeiro,
Brazil
SP5AC
QSL Bureau of Poland, P. O. Box 320, Warsaw.
Poland
SV0WB 17A Bucharest St., Athens, Greece
TI2PZ
Box 1816, San Jose, Costa Rica
VE8MM Baker Lake P. O,, N.W.T., Canada
VE8OX Hal Carson, Clyde River, Baffin Island, %
Eastern Arctic Control, Ottawa, Ont.
VP1WS Wm. Swan, % Govt. Radio Sin.. Belize, British
Honduras, C.A.
VP4CO APO 869, % PM, New York, N. Y.
VP4LC (ex-VP4TAC) Jack Correia, % Pan-American
Airways, Trinidad, B.W.I.
VP5BF (QSL via W4LVV)
VP8AP Signy Island, South Orkneys, via Port Stanley,
Falkland Islands
YV5DO Pablo Estrada, Box 2158, Caracas, Venezuela
ZB1AB Georgette House, Church St., Paceville, St.
Julians, Malta
ZB1BD C. J. Curtis, RAF Signals Unit, Malta
ZB2I
Nr. 9 Naval Hospital Rd., Gibraltar
ZS6VMO QSL to ZS6T, Rev. D. C. H. Human, P.O.
Box 55, Coligny, Union of S. Africa
3V8AJ
Box 155, Tunis, Tunisia
Assists on this play are due Wls IAP, IKE, RW8; W2s
ADP, AKX, CJX, ZVS; W4s BYF, BPD, FOY, MR; W8s
WEN, YFJ; W9s CFT, DGA, W0ARH; KH6PM; The
Northern California DX Club's The DXer.
Tidbits:
OY3lGO's line bead's good tidings. OY2RD is now active on 75 and 20 'phone each night at 2300 GCT, conditions per mitting, with an input of 25 watts. He'll be signing the OY prefix for but a few more months, however. OY3IGO, him self, is fairly active but the country's third licensee, OY5WS, is Sparks aboard a trawler with practically no mainland operating time available. Ingvar asserts that all other sta tions claiming to be in the Faeroes are spoolers-----------While not polishing up his new 7-Mc. ground plane, W4MR now scratches his noggin re the 20-meter man lately giving the gang conniptions by signing 8A0. Al's pet 250TL passed away, giving him an opportunity to initiate into service his
stock of surplus 304TLs. Gangway, Channel Two!
W2RGV contributes more information about the Pieter
maritzburg DX Club. This ZS5 outfit was founded in 1948
and now consists of twelve members, all DX specialists.
Any non-ZS station contacting five or more of the boys is
made an honorary member and is awarded a certificate of
merit. Twenty-six sheepskins have been issued so far but no
W/VE has yet made the grade. Upon contacting your fifth
Pietermaritzburg station, merely pass along to him the first
names and QSO dates of your previous four and you're in
_____ _ ,, PK2ZZ obligingly air-mailed a card to W2WZ but
Al can't produce a QTH to return the favor. -Any advice
would be much appreciated by W2WZ
A native of
Cyprus, ST2TC is able to operate almost daily from 1400 tn
2000 GCT on 14,010 kc. Fifteen watts, a Sterba array and
an HRO keep Chris satisfied and W6NTR states ST2TC
is quite anxious to maintain a sterling QSL policy for all
concerned. Incidentally, W6NTR's lil ole BC-458 has reeled
off over 100 countries in about a year's time
Word,
from G5RV may gratify certain of the fraternity. The
YT4AX who was active for a few months in 1948 is perfectly
okay. The boom was lowered on him, though not too se
verely, and it is possible that his QSL obligations will be
paid up some time in the future
A bid for the dis
tinction of being the world's highest ham, is announced by
OA4DO, Bob's gear at Cerro de Pasco is located 14,200
tootsies above sea level. OA4DO is consistently active on
29,120 and 28,280 kc. using 150 watts of n.f.m., an NC-
240C and a folded dipole ..... - . _ ZS5JQ takes time out
during the construction of a new VFO to say via W6CYB
that he intends to continue a strict 100% QSL policy. Sta
tions shy a 5JQ pasteboard need but reapply
Hav
ing his hands quite full with the FM8AD QSL situation,
W4AZK would like a few points made clear. So far Dave is in
possession of only the 15th ARRL DX Contest log and a
few more recent entries of FM8AD. It is possible to confirm
other contacts but delay in. such cases is unavoidable.
FM8AD, you know, has been quite active over the years
and you'll have to bear with W4AZK during his time of trial
on this score . _
We take special pleasure in welcoming
Lew Papp, W3MAC, into the DXCC. Lew turned the trick
exclusively on ten 'phone while running 30 to 50 watts in
put to parallel 6L6s. Being totally blind has not handicapped
Lew to the extent of preventing his also holding an EC ap
pointment for his section, an RCC membership and WAC/
WAS certificates. Now that he has his DXCC, W3MAC will
concentrate on traffic work in conjunction with the Dela
ware River flood network -- an RCA wire recorder aiding in
this accomplishment -- and we wish him the best of hick on
all counts___________ MD7DC came through with a slough
of QSLs, to quote WHKE. and is particularly interested in
WAS. More cards are being printed and 100% QSL is guar
anteed. MD7DC usually is found on 14,080 kc. from 2100
GCT onward
Contacts with the British Empire
will be difficult for W stations over January 14th-15th and
28th-29th on c.w. and January 21st-22nd on 'phone. Propa
gations! disturbances the cause? Nope. Those are the sched
uled dates of the 1950 BERU Contest, open only to ama
teurs of the B. E, It will undoubtedly be exasperatingly
frustrating to hear those juicy VQ9s and ZD7s pop up for
the event but let's keep out of their hair for once! _____ _ _
We are favored with an interesting epistle through courtesy
of W3DPA, same being from the hand of Larry Kelsey of
(Continued on page 116)
The businesslike layout at ZS6SG, operated by H. Black of Johannesburg. The station is designed primarily for 28-Mc. work.
January 1950
Audio Phase-Shift Networks
BY GEORGE H. N* IBBE, W6BES
amateur interest in single-sideband techniques /V has increased rapidly during the past two -L -X- years, undoubtedly spurred on by the ap pearance "on the air" of a considerable number of amateur single-sideband transmitters and the development of new single-sideband receiving methods. The generation of a single-sideband signal has long been possible by the so-called "filter method," but it is only recently that another method has been made practical. This second method,*1 often referred to as the "phasing method," has been incorporated in several ama teur designs for single-sideband transmitters and receivers. In a single-sideband transmitter using the phasing method, the audio modulating signal is first split into two channels, to yield two similar audio signals. However, one of these signals must be. delayed by one-quarter cycle, or 90 degrees, with respect to the other. If these two audio sig nals that differ by 90 degrees are used to modu late two r.f. signals of the same frequency but differing in phase by 90 degrees, the combined output is a single-sideband signal. A related technique can be used in receiving that will reject one or the other sideband of an ordinary a.m. sig nal, resulting in a high degree of effective selec tivity.2 The same receiving system is also well suited to single-signal c.w. reception without the need for sharp filters. The key to these phasing techniques is the net work that gives a shift of 90 degrees over the audio range. Several of these circuits were de scribed in 1946,3 and there has also been some more recent discussion of their theory and de sign.4*The audio range over which the single-side band effects can be maintained depends upon the audio range over which the 90-degree shift can be held. While it is practically impossible to cover the full audio range from 20 to 16,000 cycles, it is not at all difficult to build networks that will hold within ± 1° over the normal voice range or even the normal music range. Dome's article on the networks showed several possible circuit configurations. Of these, one type
*% Canoga Corp., 14315 Bessemer St., Van Nays, Calif. 1 Norgaard, "A New Approach to Single Sideband,"
QST, June, 1948. 2 Norgaard, "Practical Single-Sideband Reception."
QST, July, 1948.
3 Dome, " Wide-Band Phase-Shift Networks," Electronics,
Dec., 1946. 4 Luck, "Properties of Some Wide-Band Phase Splitting
Networks," Proc. I.R.E., Feb., 1949.
& G. E. Ham News, Nov.-Dec., 1948.
6 Goodman, "The Basic 'Phone Exciter," QST, Jan.,
1949.
allows individual adjustment of the resistors and condensers used in the network -- the others all
require that the absolute value of each com ponent be known accurately if the phase shift is to be held within close limits. For this reason, the adjustable type has enjoyed considerable use, particularly where the networks are to be built by production methods. Each stage requires that the components be stable after adjustment, but their actual value need never be known.
The circuit diagram of a network of the ad justable type is shown in Fig. 1. Three "phase splitters" are used in each of the two branches;
the first two tubes give accurately-balanced pushpull outputs that are applied to the RC half-lat
tice filter sections. The third tube gives push-pull output voltages. Resistors in the half-lattice have a tolerance of 5 per cent, and this possible 5 per cent error is compensated for by adjusting the trimmer condenser at a specified frequency to give a 90-degree phase angle between the input and output of that stage. Once set, the trimmers are secured with cement.
Luck's analysis shows that if the error tolerance at. 90 degrees between the two output voltages is specified, the maximum frequency range is fixed over which this error is not exceeded. For ex ample, an angle of 90° ± 1° between the two out put voltages can be obtained over a frequency range of approximately 9 to 1, while a maximum error of two degrees allows a frequency range of approximately 17 to 1, etc. If a frequency range greater than 9 to 1 is required, and the maximum error that can be tolerated is, perhaps, one de gree, Norgaard has shown that more than two stages can be cascaded to obtain a wider fre quency range. However, a 9-to-l frequency range is adequate for the transmission of speech, and was the basis of the design shown in Fig. 1 and discussed here.
In a single-sideband transmitter, an error of one
degree will cause the undesired sideband to be attenuated 41 db. below the desired sideband in an otherwise perfect single-sideband generator. Likewise, in a single-sideband receiver using such a network, the same relation holds. An attenua tion of 41 db. is a voltage ratio of 115 to 1; so, for example, a c.w. signal will have 115 times more amplitude on one side of zero beat than on the other side. Since one S unit is about 6 db., seven S units of attenuation of the undesired sideband can be obtained.
The method of alignment, once the alignment frequencies have been determined, has been
described elsewhere, "·6 but will be repeated be-
42
QST for
Fig. 1 -- Wiring diagram of
a 90-degree audio phase-shift
network.
Cj, C3, C5 -- 75-Agfd., 5%.
Cs, C4, Ce -- 3-30
mica
trimmer.
C7 -... 820 wJd., 5%.
Cs
25-280-g/xfd. mica trim
mer. Ri, R2 --1000 ohms, matched
to R.3 --· 0.27 megohm.
Ri, Rs -- 3300 ohms, matched
to Re -- 3.0 megohms. R7, Rs -- 4700 ohms, matched
to 1%.
Ra, Rio --1000 ohms, matched
. to Rn --1.0 megohm. R12, R is--3300 ohms, matched
to Vi%.
Ru --1.1 megohm. Ris, Ris--1700 ohms, matched
to 1%. AH resistors H watt and *=5%.
low. Extreme care is required in the alignment process to eliminate phase-shift errors in the oscil loscope used for indication of the 90-degree phase shifts, and in setting the audio-oscillator fre quency accurately to the alignment frequencies. One source of error that may be encountered is distortion in the audio signal generator. A very small amount of distortion will give a false indica tion of the 90-degree pointe. (The network is fre quency sensitive and delays the harmonics more than it delays the fundamental.) The author has
used a low-pass filter to reduce the harmonic con tent in the audio-oscillator output, but has also
found that check points calculated from the mathematical relations involved in the design will quickly indicate an error in alignment and will also allow adjustment to be made to reduce such errors.
When proper precautions have been taken in the alignment process, the phase-shift character istic is found to be exactly similar to the calcu lated characteristic shown in Fig. 2. It can be seen that at frequencies below 328 c.p.s. and above 3044 c.p.s. the angle becomes less than 89 de grees. The high-frequency response of the speech
amplifier should therefore be limited with a lowpass filter in order to reduce unnecessary inter
ference. The low-frequency response should be cut off below 300 c.p.s. to save power and to make the insertion of the carrier at the receiving end a little less critical.
Fig. 3 shows the amount of attenuation of the rejected sideband as a function of the modulating audio frequency. Over the range of approximately 300 to 3000 c.p.s. more than 40 db. of attenuation
is obtained, and at the four frequencies where the angle is exactly 90 degrees infinite attenuation is obtained.
Fig. 4 shows a curve of the audio-frequency re sponse characteristic that would give 40 db. of attenuation of the undesired sideband regardless of the audio frequency. In a single-sideband trans mitter, for example, the speech-amplifier response curve would have to resemble Fig. 4 to obtain 40db. attenuation of the "wrong" sideband. In a single-sideband receiver the response curve of the audio amplifier following the network should look like Fig. 4. Of course, Fig. 4 is an ideal charac teristic; there is nothing sacred about the 40-db. figure, and 30 db. is probably more than adequate. The curves do show that the network should be as
Fig. 2 -- Phase-shift characteristic of the network of
Fig. 1.
January 1950
43
lytic condenser across the low-voltage output. (The condenser must be rated for full power supply voltage.)
Fig. 3 -- Attenuation of undesired sideband at vari
ous audio frequencies, using the network of Fig. 1. This
is a theoretical curve and assumes perfect adjustment
throughout the system.
good as possible, and also the general shape of the filter response curve that is required for good performance. Other factors will reduce the at tenuation obtained, so optimum performance of the network and filter will improve the over-all operation.
Any phase shifts that occur in the circuitry associated with the audio phasing networks must be kept to a minimum. If the input and output circuits for one channel are different from those for the other, and either or both have a phase shift of their own, the two outputs will no longer have the relation shown in Fig. 2. This require ment can be satisfied by using condensers of at least 0.1 Mfd. for the coupling condensers and one-megohm resistors for grid resistors, and by feeding the network from a low-impedance source, such as a cathode follower or an amplifier stage with a low value of plate resistor. These resistors and condensers are not shown in this unit, since the demands of different circuit arrangements vary. A receiver adapter built by the author uses transformer coupling to the input grids, for ex ample. If the values of the coupling condensers and grid resistors are made large enough, phase shift of the coupling circuits will be negligible, and the parts will not require small tolerance -- 10 per cent will be adequate.
One other precaution must be taken to insure correct operation of the network. The plate sup ply voltage should have good regulation, i.e., low impedance, at all audio frequencies within the range of the unit. This unit was designed for a plate supply of 105 volts so that a VR-105 can be used. Current drain for a supply voltage of 105 is 17 ma. Alternatively, a dropping resistor from a higher voltage can be used, with a large electro
Alignment An oscilloscope and an audio-frequency oscil lator having good waveform (low distortion) are necessary for the alignment of the unit. The two inputs are tied together and connected to the audio oscillator, as shown in Fig. 5. The vertical input of the oscilloscope is connected to test point A, Fig. 1, and the horizontal input is connected to point B. The audio oscillator is set to 6383 e.p.s. as accurately as possible, and the gain con trols on the oscilloscope are set to give equal horizontal and vertical deflections. One of the 'scope inputs is then disconnected from the test point, and temporarily connected to the other 'scope input. A straight line at approximately 45 degrees should be obtained. If an elliptical pat tern is obtained on the screen, it is an indication that the oscilloscope has internal phase shift, and this must be corrected before proceeding. (If possible, to reduce possible sources of phase shift, one of the two 'scope inputs should be at maxi mum gain. Since the voltage at B is less than that at A, the H amplifier gain could be at maximum in the arrangement described above.) A 1megohm potentiometer can be connected in series with either the V or H input to attempt to get the desired straighWine pattern. It may be necessary to shunt the potentiometer or the V or II input with a variable condenser of about 150-Mgfd. capacity to eliminate these phase shifts. After as certaining that there is no phase shift in the 'scope, the H input can then be returned to point
Fig. 4 -- Audio passband required to maintain 40-db.
sideband attenuation at all audio frequencies, in a per fect system that uses a network with the characteristics of Fig. 3.
44
QST for
screen, indicating a 90-degree angle between the voltage at A and that at B. If the pattern has flat sides the output from the audio oscillator is too great and is overloading the input tube, or there may be excessive distortion in the input signal. The 'scope leads are then shifted to B and C, and the above procedure is repeated with the audio oscillator set at 610 c.p.s. To check that the settings are correct, one 'scope input is then put back on A, while the other is left on C. The audio frequency is then set at 7492 c.p.s., and the 'scope checked for phase shift. A circle should be obtained, indicating a 90-degree angle exists between A and C at that frequency. The oscillator is then set to the second check frequency of 518 c.p.s., and the 'scope again checked for phase
Fig. 5 -- Arrangement of test equipment for aligning
the audio phase-shift network.
shift. A circle should be obtained, indicating a 270degree angle between A and C at that frequency. The audio oscillator is then set to the third check frequency, 1970 c.p.s., and here a straight line at a 45-degree angle should be obtained, indicating a phase angle between A and C of 180 degrees. If a circle is not obtained at 7492 c.p.s., Cs should be adjusted for a circle. If a circle is not obtained at 518 c.p.s., C, should be adjusted for a circle. These two condensers will have the greatest effect on the phase shift at those respective fre quencies, while the middle check frequency of 1970 is a check on both. If the correct patterns are not obtained at the check frequencies, some "jockeying" may be necessary. This indicates that there is distortion in the set-up which may be due to any of the following: distortion in the oscillator or in the oscilloscope, the plate supply is not "stiff," the input stage to the network is being overloaded, or the frequencies were not set accurately.
The same procedure is followed in aligning the other channel, using a frequency of 1640 c.p.s. when adjusting Cs, with the 'scope inputs on D and E, and a frequency of l57 c.p.s. when adjust ing Cg with the 'scope inputs on E and E. The other check frequencies for this channel are 90 degrees at 1903 c.p.s., with Cs having the greatest effect on the pattern at that frequency, 270 de grees at 134 c.p.s. with Cg having the greatest effect, and 180 degrees at 508 c.p.s. as a cheek on both condensers. With the 'scope inputs con nected to C and E, a circle should be obtained
from 328 to 3044 c.p.s. if there is no phase shift in the 'scope over that range. The angle is exactly 90 degrees at 360, 832, 1202 and 2783 c.p.s. when the network is properly aligned.
Construction
All components except the tube sockets can be mounted on a 3 X 4-inch piece of % 2 -inch lami nated bakelite. The board should be wired before assembly with the tube sockets. Three-quarterinch spacers tapped at either end are used to fasten the board to the cover plate of the 3 X 4 X 5-inch utility box upon which the tube sockets are mounted. All input, output, and power-supply connections are made to terminals on the terminal board. When the mounting position in the equip-
ment with which the network is to be used is determined, a ?4-inch hole is drilled on the appropriate side of the utility box, and a rubber grommet in serted after the box is mounted on the chassis.
Once alignment is com pleted, the board should not be removed from the cover plate, since the wiring will be shifted, changing the circuit capacities and re quiring realignment after reassembly.
Appendix Total Network:
Angle between the two output voltages, 9, is
tan (H 0) -
(1)
a 4- 1
Va
One Channel:
The angle between the input and output volt ages for one channel, 0, is
tan
.......................................... (2)
J _B
fl ' f
and for the other channel
tan ( 2 .hr
h' f
(Continued on page 118}
January 1950
45
Hints and Kinks
_____ ___ For the Experimente
ADJUSTABLE TUNING RATE FOR VFOs frequency end of the dial is now too fast, it can be
In most of the VFO units described in recent years the 3.5-Mc. band has been spread out over the full tuning range of the oscillator dial.
slowed down by filing away a portion of the rotor plates of Cg as shown in Fig. 2. In this way, the 75-meter 'phone band can be spread, with some
While this is a satisfactory arrangement for op eration on 80 meters, it crowds the 40- and 20-
crowding at the middle of the 3.5- to 4-Mc. range, while still retaining the `1 open' ' bandspread at the
meter bands badly, resulting in a fast tuning rate low-frequency end. -- Clifford E. Fisher, W0MTF
that is difficult to use. The arrangement shown USING THE BC-221 FREQUENCY METER in Fig. 1 has been used with success in a Clapp AT V.H.F.
Fig. 1 -- Handy system of adjusting the tuning rate
of a Clapp VFO. Adjustment is described in the text.
he BC-221 frequency meter has a variable
Toscillator covering either 125-250 or 20004000 kc., plus a low-drift 1000-kc. crystal oscil lator. Although the accuracy, dial, and stability are excellent for its original uses, its utility for frequencies above 30 Me. is considerably im proved by the addition of the harmonic amplifier
shown in Fig. 3. The harmonics of the crystal are then audible every megacycle up to 300 or more, and by switching to "xtal check" and tuning the oscillator in the usual manner, sum-and-difference
Ct -- 25-^fd. variable padder. Cs -- 50-ggfd. variable padder. Cg-- 140-ggfd. variable.
VFO in which the oscillator was on "160," and where harmonics of the oscillator frequency were to be used in the other bands. The effect is to slow down the tuning rate in the lower-frequency por tion of the range (where you want it to be slow for multiplying into the higher-frequency bands) and to speed it up at the high-frequency end where frequency multiplication is not called for.
Tuning is done with Cs, which is connected in series with a 50-w»fd. padder. To set the fre quency range, first set Cs at minimum capacity, and adjust the parallel padder C'i until the har monic falls at the high-frequency end of the de sired tuning range. Then set Cs at maximum and adjust series trimmer C« to bring the low-tt&quency end of the tuning range to where you want it. These two adjustments interlock to a certain degree, but with care you can get things set so that the desired spread of the low-frequency end of the bands is obtained.
If you find that the tuning rate at the high-
Fig. 2 -- Notching the condenser plates in this maimer
will spread the high-frequency end of the tuning range.
Fig. 3--Schematic diagram of a harmonic amplifier for
the BC-221 frequency meter to extend its range to 300
Me. The unit can be built on a small bracket and at tached to the side of the chassis.
Ci -- 100-aufd. mica.
Ca, Ct -- 0.001-gfd. mica.
Ga -- 5-/-tMfd. ceramic.
Ri -- 3 megohms,
watt.
Ka -- Jv megohm, fi watt. Ra -- .1000 ohms, fi watt.
RFC --- 15 turns No. 22 enam. close-wound on a la-watt
resistor of any high ohmic value.
frequencies are generated. For instance, with the variable oscillator set at 200 kc., which may be accurately done by beating with the crystal, notes may be found every 200 kc. from 144 to 148 Me., while when switching to ` ` xtal only " only the meg acycle markers remain. Similarly, when the vari able oscillator is tuned to 2500 or 3500 kc., beats are evident every 500 kc. If a frequency at 144.101 Me. were to be measured, the signal could be
(Continued on page 180)
46
QST for
United States
Naval Reserve
Over-thb-air code practice is conducted by K0NRZ, U. S. Naval Reserve Training Cen ter, Topeka, Kans. These code, lessons were originally inaugurated to assist, interested citizens of Topeka and neighboring cities in obtaining amateur operator licenses. As the program has progressed, reports have been received from coast to coast and from as far distant as Hawaii, with high interest in all quarters. One-hour lessons are
transmitted on 29.5 Me. commencing at 7:00 p.m. CST, Monday through Friday. Several hundred individuals are participating in the program. Those benefiting include patients at Topeka's veterans hospital and youths at Boys Industrial School, Topeka.
In addition to the program of code practice, K0NRZ has inaugurated an " Amateur Night," 8:00 until midnight or later each Friday. Regular ham-club discussions are held, but emphasis is on helping the newcomer and development of more efficient amateur operators. One product of the Friday night get-togethers is an amateur radio emergency network for Topeka and vicinity. The following amateurs are members of this emer gency network: K0NRZ, net control station, 29.5- and 7-Mc. trunks, emergency power; W0WGM, ARRL emergency coordinator, 3.5Mc. c.w.,'3610 kc.; W0HCV, 3.85-Mc. 'phone,
3920 kc.; W0HOC, 7-Mc. c.w., emergency power: W0UPU, ARRL emergency coordinator, Red Cross; W0SO, State Highway; and the following 29.5-Mc. mobiles: W0ICV, ARRL emergency coordinator, W0s QV, ZMC, ABV, HIK, AAZ, ECF, HBL, GBK.
Saturday afternoons at K0NRZ have been set aside for classes in " Fundamentals of Radio." There already are 25 enrollees.
now performed by CIC. These functions, how ever, have not been changed for the present.
On 1 November 1949 the Fourth Naval Dis trict became 100 per cent in number of II. S. Naval Reserve training centers having amateur radio stations.
Following a devastating typhoon, which hit Guam on 17 November 1949, messages of reas surance were transmitted by amateur radio to friends and relatives of personnel in the stricken areas. Using ARRL-numbered texts, KG6DI, op erated on emergency power by a Navy chief radioman, sent traffic on 14 Me. to W50M, Comdr. J. M. McCoy, USNR, New Orleans. W50M forwarded the messages to their destina tions in all parts of the country via Western Union.
New commanding officer of Electronic War fare Company 4-7 at Upper Darby, Penna., is Comdr. P. W. Moor, a member of the Reserve for many years. His amateur call, W3SB, will be remembered from prewar years.
Northernmost of all Naval Reserve drilling units is Electronic Warfare Platoon 17-1 on the island of Kodiak, east of the Aleutians, in Alaska. Lt. Comdr. F. II. LaBree, USNR, is officer-incharge. The unit is active on the amateur bands with the call KL7NR;
(Continued on page 118)
A recent directive from the Chief of Naval Op erations changed the name Combat Information Center (CIC) to Command Operations Center (COC) in order to describe better the functions
$
These amateurs originated the '"Over-the-air" code school at K0NRZ. U. S. Naval Reserve Training
Center, Topeka, Kans.: (I. to r.) Ed See, W0KRZ;
Lt. Comdr. Robert French, USNR, W0TPF: Orville Strimple, W0UPU; Bill Wright, ET2, USNR, W0HOC: Carl Fisher, ET2, USNR, W0HIK; Ed Benton, W0WGM.
January 1950
Debugging the Electronic Bug
Some Improvements on Earlier Models
BY RICHARD H. T* URRIN, W2IMU
During the past several years many fullyautomatic electronic keyers have been de vised. Most of these have been based on the
new timing network. The RC network composed of Ci, Ri and Ri is charged either from a tap at approximately 50-60 volts on the divider (dots),
multivibrator principle. Invariably most of thesoer from the full supply voltage (dashes). This
arrangements have shown up flaws, whether elec positive charge is applied to the grids of both
trical or mechanical, which have made them triodes through the 2-megohm resistor, which
erratic or annoying in practical operation. How prevents the grids from drawing excessive cur
ever, a new circuit described in QST for October, rent.
1948,1 has shown excellent possibilities because of
its simplicity and ingenious electrical principle.
Unfortunately, practical experiments have shown
a troublesome point in the timing network and
more specifically in the grid-stabilizing network.
The purpose of this article is to bring out a
modification of the original circuit in the timing
network and to provide additional information
for the successful construction of an electronic
key. The modification was first conceived by Bo
Brondum-Nielsen, OZ7BO, and put into use -with
excellent results.
The theory of operation has been covered thor
oughly in the original QST article mentioned
above and will not be repeated here, the basic
functions being unchanged in the modification.
It is suggested that anyone interested in this
(A)
keyer should read and understand this original
article before proceeding.
Fig. IA shows the original circuit with the tim
ing and grid-stabilizing network drawn in heavier
lines. This part of the circuit will be changed to
(ionform with the modified version of Fig. IB.
The rest of the circuit remains unchanged. The
difference between the two circuits is the way in
which the dot and dash voltages are obtained.
The original circuit uses two series condensers
charged from a common supply while the modi
fied circuit uses a single condenser charged from
taps on a resistance voltage divider. There are
several distinct advantages in the latter method
since it eliminates the need for the grid-stabilizing
network. This has been the cause of most of the
erratic operation. The use of a single condenser in the timing network further improves the circuit to the extent that, unlike the original circuit
Fig. I -- A -- Original circuit from October, 1948, QST. B -- Modified circuit. Heavy lines indicate por
tion of circuit under discussion.
which has its ratio control in the timing network The regulation of the power supply, as well as
itself, any changes in the timing network will that of the dot tap on the divider, must be reason
only affect the speed. The only disadvantage is ably good, since these affect the length of the
an increased drain on the power supply.
first dot or dash in a group. The idling-current
Fig. 2 is a practical working model using the load, which is between 40 and 50 ma., provides
sufficient regulation to a conventional supply of
* R.F.D. 1, Millington, N. J. 'Bartlett, "Further Advances in Electronic-Keyer De sign," QST, Oct., 1948, p. 27; "Feed-Back," QST, Jan.. 1949, p. 10.
about 275 volts under load. Filtering need not be great but if insufficient may cause erratic opera tion at higher speeds when the relay action may
48
QST for
Fig. 2 -- 1'he complete cir
cuit as modified by OZ7BO.
Ci -- 0.02-Mfd. 400-volt paper.
Ri --4-megohm potentiometer.
Ka -- I megohm, 1 watt.
Rs -- 2 megohms,
watt.
R4 -- 510 ohms,
watt.
Rs, Re -- 2400 ohms, 1 watt.
R7 -- 25,000 ohms, 5 watts.
Rs -- 3000-ohm wire-wound var
iable.
R9 -- 20,000 ohms, 5 watts.
Rio -- 10,000 ohms, 5 watts.
Ku -- 3000-ohm wire-wound
potentiometer.
Ryi, Rya -- See text.
V1, V2 -- Section of 6SN7.
be affected by the pulsing direct current.
In this model Ryi and Ryz are inexpensive 5000-ohm s.p.d.t. types rated at 5 to 7 ma. closing current. Both relays should be closely matched in mechanical as well as electrical characteristics. If possible, they should be identical. Because Ci does not charge instantaneously through Ri, Ryi cannot be a fast-acting or high-speed relay. If this relay opens its contacts too soon it will break the charging current of C\ at a steep point on the exponential charging curve, causing erratic oper ation. Although the relays used in this model are of the fixed-contact type, relays with self-wiping contacts are desirable and will aid in eliminating the above-mentioned trouble and in keeping the contacts free from excessive surface resistance -- another factor in erratic operation. As in the original circuit, Ri is included to minimize spark ing at the key and relay contacts. Rz also is in cluded not only to limit the highest speed but, as well, to save R, from possibly burning out at one
end. It might be mentioned here that since Ci and
Ri plus Rz compose a simple RC circuit, there are infinite combinations which can be used for a given speed. However, the smaller Ci becomes, the shorter will be its charging time, permitting a faster-acting relay at Ryi. Unfortunately, too small a value at Ci will make the grid impedance too high and susceptible to stray pick-up of a.c., again resulting in erratic behavior. Consequently Ci has been chosen at an optimum value of 0.02
Aifd. Even at this value care must be taken to keep the charging and grid circuits out of strong a.c. fields. Another point where trouble may appear is at Ryi where poor insulation between the solenoid and its contacts will pass sufficient cur
rent to charge Ci. Needless to say, good-quality relays will not be subject to this condition.
Proper adjustment of this circuit is the same as in the original article. However, since we ».re
using a 6SN7, different voltages will be encoun tered. At a plate voltage of 275, the 6SN7 will cut off at about 25 volts bias. Therefore, the cathode of Ki is made 25 volts positive, or a similar value that will just cut off plate current. The bias on Vz will be somewhat higher and is best adjusted once the circuit is in operation. Likewise, the ratio control can be adjusted prop erly with the circuit in operation.
If the circuit of Fig. 2 is followed closely, only minor adjustments will be necessary -- mostly regarding the relay-spring tension to match the conditions of operation. Final adjustment of the dot-dash ratio and space length may be made by methods previously given in QST.
Let me call your attention to the fact that this keyer is a self-completing type. Once a dot or dash has been started by a mere tap of the key lever, one complete dot or dash plus one space are made and this cannot be interrupted or inter fered with in any way because of the action of Ryi which disconnects the key lever from the timing circuit for the complete period of mark and space. This feature is very important in ac curate and effortless code sending. But, to quote OZ7BO, "A word of warning. Many will find considerable difficulty initially in using the elec tronic bug, but after a few hours or months of practice, it will become a pleasure to use. A dis contenting feature is that one very quickly be comes aware of the mistakes made previously, and if one tries to maintain the old style of send ing, he is promptly greeted with a variety of characters not visualized by Samuel Morse.''
Check!
SWITCH
TO SAFETY I
January 1950
49
Answering the Beginner's Question-- "C.W. or Phone?"
BY DALLAS T. H* URD, W2PFU
Despite the heated blasts of bitter words con tinually blowing back and forth between dyed-in-the-wool brass pounders and 100%
· W2PFU has written this article pri marily for the guidance of the beginner;
'phone men, it always has been difficult for the it is not intended to fan the fires of
beginning amateur to ferret out the truth about the comparative merits and shortcomings of the two principal methods of amateur communica
any long-standing feuds. Incidentally, there's also meat aplenty herein for every clear-thinking old-timer.
tion. Answers tossed by old-timers at young
squirts brash enough to inquire about such deli
cate subjects run the gamut from "Get your ticket, head for 10 'phone, and forget the danged code" to "'Phone's OK if you've nothing better to do than gas with the locals, but the real DX is on c.w." This treatment may give the be ginner some (queer ideas of his own but it cer tainly doesn't provide him with much in the way of useful information for getting started. Nor is the neophyte likely to find much in the way of published material on this puzzlement. So hold onto your hats, gang, here we go.
ers employ a high degree of abbreviation and
terse, to-the-point statements. This is only nat ural. Most conversation is not particularly effi cient and probably would not be pleasing to listen to if it were. In working DX the time spent in ac
tual communication is so greatly outweighed by the time spent in listening and calling that the difference between c.w. and 'phone as regards rate of communication is negligible, especially since most DX contacts are likely to be short and snappy.
It is also true that 'phone contacts are very
much more personal than c.w. Human voices,
spiced with the accents from different sections,
states and countries, are warm and interesting.
(And so are all the charming YLs and XYLs one
meets on the 'phone bands. On c.w. Gloria De-
lovely sounds like any bewhiskered brass
pounder regardless of how sweet she may be!)
This projection of personality is another reason
for the appeal of 'phone operation although ex
perienced c.w. operators often can recognize then'
acquaintances by their style of sending, or "fist."
Ab regards difficulty in operation, leave us face
The big appeal of 'phone operating lies in the fact that most of us find talking and listening to speech easier than pounding brass and copying
code. For one thing, we can say so much more in the same length of time. Normal talking speeds range well over one hundred words per minute and the fast talker may hit two hundred or bet
ter, whereas most c.w. men stick around 20 w.p.m. and even the " speed merchants " seldom do much over 40 (with readable sending, that is). This bal ance in favor of 'phone is fine, in theory at least, and certainly works out for the social-minded hams designated as " rag-chewers." On-the-air listening tests indicate, however, that this 5- or 10-to-l differential in communication rate is sel
dom utilized. 'Phone operators generally use up a lot of on-the-air time in useless wordage and repetition while the majority of c.w. practition-
it. We must admit that many fellows find the code just plain hard work and not much fun.
Not all of this is attributable to mental laziness, either; it takes years of practice and operating
experience to be able to copy 448 code at 30 w.p.m. through QRM, and a lot of hams give it up long before they have reached any high de
gree of proficiency. Others, exhausted from the struggle of squeezing "13 per" for the license examination, turn their backs on code before the ink on the ticket is dry. It should be said, though, that for those who have the patience and lietermination to master the code there is a real thrill and genuine sense of achievement in being able to send and copy fast code perfectly. For
proof of this, notice sometime how the really snappy solid signals on 40 and 80 just ooze with self-confidence.
In considering the relative number of stations
St. David's Lane, Schenectady, N. Y.
available to be worked, it is pretty much a toss-
50
QST for
up between c.w. and 'phone so far as American amateurs are concerned. The DX countries show a balance in favor of c.w. though, and many of these -- including a lot of the really rare DX --· are represented on c.w. exclusively.
So much for the personal side of the c.w. versus 'phone discussion. If you're an old-timer and one of the kilowatt brethren on your local 75 'phone rag-chew net, you probably won't be interested in reading any farther. But let's get down to brass tacks now. According to a recent authoritative publication on radio propagation,1*the effective-
0l?MS POUNDER
ness of c.w. for satisfactory communication is 17 db. greater than 'phone. This is a big difference, 17 db. representing a power ratio of 50 to 1. For example, if my pair of GL813s running a full kilo watt on 'phone is putting an R5-S9 signal into Zanzibar on a clear channel 20 kc. wide ( I should live so long!) my neighbor, using the same kind of antenna system and a GL1614 e.w. rig, running light at a mere 20 watts, can be having communi cation with the VQ just as effective as mine.
Please note, dear beginner, that this difference is entirely without considering probable inter ference from other amateurs who conceivably might bo calling the VQ. This 17-db. difference arises from the fact that in 'phone most of the in telligence is carried by the relatively weak con sonants whereas most of the power transmitted is in the less-effective vowel sounds. In c.w. all of the power radiated is in the form of useful com munication. Also, the b.f.o. of the c.w. receiver may exalt the effective strength of the incoming signal.
Now, let us make allowances for the bedlam of QRM usually present on the DX bands and ex amine the situation again. If my signal is at least 6 db. better than the rest of the crowd, well and good; communication probably will be satisfac tory. But let some other fellows with signals just as strong or stronger than mine move in any where within 6 or 8 kc. and trouble starts for the guy at the receiving end. On the other hand, with the highly-selective crystal filters we now have, a weak c.w. signal can be pulled through the mess
1 Manual of Radio Propagation, D. H. Menzel, PrenticeHall, New York, 1948.
and copied from between signals that may be many times stronger and much closer than 1 kc.
The difference in. communication effectiveness between c.w. and 'phone under conditions of heavy QRM will certainly be much greater than the 17-db. figure mentioned previously. Just how much greater would be very difficult to estimate, since the difference would depend upon the de gree and nature of the QRM at the receiving end. It is significant, and not at all surprising, that the military forces' main lines of communication are based on c.w. telegraphy. Long after 'phone has become unreliable, or has faded completely out of the picture, c.w. will still get through. This has been clearly demonstrated during recent periods of emergency communication.
Just a minute though, brother, before you junk the plans for that Glass B modulator and turn to the keying chapter of the Handbook. Let's have a look at the single-side band systems that have been assuming prominence lately.2,3'4 It has been es timated that the use of single-sideband techniques results in a 9- to 12-db. effective gain over regular a.m. 'phone. Add to this the immense reduction in QRM that will result if and when the majority of amateurs turn to single-sideband transmission and the imbalance between 'phono and c.w. starts to even up. Is there any wonder that so much emphasis is being put on single sideband today?
There is one other factor that should be con sidered here. This is the matter of economy -- dollarwise -- which certainly is no secret. Watt for watt, a 'phone rig will cost at least twice as much to construct as a c.w. rig, and it will con sume from 4 to 6 times as much electric power. Moreover, it will be much harder to adjust and operate properly. If the plain truth were known,
there probably are many e.w. operators who feel that building and operating a 'phone rig is just plain uneconomical both of money and time. With a better than 17-db. difference in communication effectiveness in favor of c.w., this is understand able. The fellow with a 50-watt c.w. rig actually
_______ {Continued on page 180) *D, E. Norgaard, QST for May, June and July, 1948, 3 O. G. Villard, QST for January and April, 1948; Villard and Thompson, QST for June, 1948. 4 See also QST's regular department, "On the Air with Single Sideband."
January 1950
51
3rd V.H.F. Sweepstakes, Jan. 21st-22nd
ARRL Certificates to Section and Club Leaders--Gavel for Winning Club--All Work Must Be on 50 Me. and Above
BY F. E. H* ANDY, W1BDI
The frank aim of this contest is to work as many v.h.f. stations as possible in one week end. All points from such work will be multi
nor forms is required. Follow the log arrangement shown. All lists, small or otherwise, are welcomed by ARRL to help support claims and make
plied by the number of different ARRL sectioncsomplete results in QST possible. Report as soon
worked. "CQ Sweepstakes, this is W....... , over " as the test is over.
(on c.w. just "CQ SS de.........K") will identify stations desiring to make contest exchanges. The
Awards -- Individual and Club
Third Annual V.H.F. Sweepstakes will start at Certificate awards will go to V.H.F. Sweep
2:00 p.m. your local time, Saturday, January stakes winners in each, ARRL section and to
21st, ending at midnight Sunday. 'Phone, m.c.w. leading operators of clubs where three or more
or c.w. may be used, with results all contributing submissions are received. A club gavel goes to the
to one score.
club with top aggregate score. Get set for a v.h.f.
If an exchange of SS data is completed in both operating week end!
directions two points may be claimed. To make it easy to record exchanges they should be sent in
Rules
the order of information shown. Exchanged in 1) Eligibility: Amateur operators in any field
formation is in the form of a message preamble, organization section 1 operating fixed, mobile or
with the ARRL section*1 substituted for the city portable under one call on or above 50 Me. are
and state, and the RST report for "check." Any invited to take part.
station you work is good for one point in the 2) Object: Amateurs in U. S. and Canadian
score if you get the other operator's acknowledg sections of the ARRL field organization will at
ment of "message, " whether he is in the contest tempt to contact as many other stations in as
for score or not.
many sections as possible.
Contest reporting forms for your convenience 3) Contest Periods: The contest starts at 2:00
will be sent free on request. Neither advance entry p.m. your local time Saturday, Jan. 21,1950, and
ends at midnight Sunday, Jan. 22, 1950.
* Commumcationa Manager, ARRL. 1 See list of sections in the ARRL field organization, page 6. Awards include Puerto Rico, Hawaii, Alaska. In operat ing use section name abbreviations such as E. Mass., R. 1.,
4) Exchanges: Contest exchanges, including all data shown in the sample, must be transmitted
and receipted for as a basis for each scored point.
W. N. Y,, Neb., N.Y.C.-L.I.
5) Scoring: (a) Contacts count one point when
2 In 'phone RST exchanges only two numerals need be used. Say Readability. . . . Strength. . . . On c.w. full 3number RST reports should be logged.
3 Where only one point is made on a contact you can add
the required exchange information has been re
ceived and acknowledged, a second point when exchange has been completed in both directions.
a point by working this station again for exchange in the opposite direction later. Leave right or left report column blank so that other pairs of exchanges completed in one contact are side by side in your report.
(b) Final score is obtained by multiplying totaled points by the number of different ARRL sections 1 worked (the number in which at least
EXPLAINING V.H.F. SS CONTEST EXCHANGES
Send Like Standard Msg. Preamble
Call
CK
Place
Time
Date
Exchanges
Contest num bers 1, 2. 3, etc., a new NR for each station worked
Send your own call
CK (Readability . . . Strength . . . orRST23of station worked)
Your ARRL section 1
Send time of transmitting this NR
Send date of QSO
Purpose (example)
QSO NR tells how you are doing. (NR 1)
Identification (WIAW)
All exchange reports (589)
Section 1 vital Time and date must fall in
contest data. contest period. (6R55 f.m.
(E. Mass.)
Jan. 21)
52
QST for
STATION W. . . . -- SUMMARY OF V.H.F. SWEEPSTAKES EXCHANGES
1
Points
freq. Band (Me.)
NR
SENT (1 point)
RECEIVED (I point)
Time . . . Date
. . ST
{Jan.)
CR
Sin. EST Section
NR Stn.
CR EST
Section
Time
Number of Each Date Different (Jan,) New Sec tion as Worked
50 1 W1AW 57 Conn. 4:15 p.m. 21
50 2
43
4:35 p.m. 21
50 3
58
9:09 p.m 21
144 4
49
9:30 p.m. 21
144 5
57
9:50 pm. 21
50 6
54
11:30 p.m. 21
144 7
58
11:35pm. 21
144 8
57
11:45 p.m. 21
144
144 9 W1AW 34
8:50 a.m. 22
50 10
479
9:18 p.m. 22
50 11
589
10:40 p.m. 22
3 W1QIX
41 Conn.
4:18 p.m. 21
7 W1HDQ
59 Conn.
4:40 p.m. 21
6 W1EI0
359 Maine
9:11 p.m. 21
32 W1CLS
58 E. Mass.
9:36 p.m. 21
15 W1SF
58 Conn.
9:46 p.m. 21
11 W20HE
48 N.Y.O.-L. I. 11:32 p.m. 21
30 W1QIX
57 Conn.
11:35p.m. 21
21 W3MKL 59 Md.-Del.-D.C. 11:56 p.m. 21
18 W4FNR 3 59 E. Fla.
12:34 a.m. 21
27 WINY
59 W. Mass.
8:47 a.m. 22
12 W5AJG 379x N. Tex.
8:20 p.m. 22
20 VE1QY 569 Maritime
11:35 p.m. 22
12
2
2- 2
32
j
4o
2
5
·1
61
7 30 92
No. Bands Used: 2
9 Sec., 23 Pts.
Number and names of operators having a share in above work.,...................... ........... .................
Claimed score: 23 pointe X $ sections " 207.
I hereby state that score and points set forth in the above summary are correct and true.
Equipment:
Signature.......
.......
Tubeline-up...... ..... ...... ......... .....
Address....... ...........
Number different stations worked..........................
one SS point has been credited). 6) Conditions for Valid Contact Credit: (a)
Repeat contacts in other bands confirmed by completed exchanges of up to two points per band may be counted for each different station worked. (Example: W1XXX works W3MQU on 50 and 144 Me. for complete exchanges, 2 points each on each band. 2+2 gives 4 points but only one
section multiplier.) (b) Crossband work shall not count for any
points or sections.
(c) All work for one entry must comprise points made while operating in a given ARRL section.
7) Awards: Entries will be classified as single- or multioperator, a single-operator station being
defined as one manned by an individual amateur who neither receives assistance nor gives as sistance to any person in the contest period. Certificates will be granted based on the leading work in the single-operator classification in each ARRL section. Multioperator work will be grouped separately in the QST official report of results.
When three or more individual club members compete and submit logs naming the club with which they are identified, an ARRL certificate will be issued through such club to the leading
individual in the local competition. When less than three individual logs are received there will be no club award or club mention.
A gavel with engraved sterling-silver band is
offered the club whose secretary submits the greatest aggregate score, such claim successfully
confirmed by individual amateur reports (resident club members only) which mention the club.
8) Conditions of Entry: Each entrant agrees to be bound by the provisions of this announcement, the regulations of his licensing authority, and the decisions of the Award Committee.
9) Reports from all entrants must be post marked no later than February 6, 1950, to be considered for awards.
Silent Bepö
t is with deep regret that we record the
I passing of these amateurs:
W1AE, Francis Lebaron. Brockton, Mass. W1ALY, Samuel Perlmutter, Brighton, Mass. W1FKS. Joseph D. Valliere, Cambridge, Mass. W2R0G, Arthur F. Sandroni, Riverside, N. J. W2RSF, J. Taylor Stokes, Ventnor City, N. J. W2TVF, Edmund D. Walters, Hamburg, N. Y. W2VJR, Edwin J. Ramhorst, Highland Park, N. J. W2WFD, Capt. Wm. F. Parker, USAF W3NPB, ex-W9NHJ, Howard M. Williams, Drexel
Hill, Penna. W4BTI, A. Lynne Brannan, Marietta, Ga. W4PCG, Karl B. Brumback, Farmville, Va. W5HN, James L. Bradberry, Little Rock, Ark. W5NMD, Mrs. Mildred B. Coulter, Tulsa, Okla. W6WKL, John P. Jones, Hayward, Calif. W8T0, Howard R. Young, Columbus, Ohio W9TRK, C. A. Martin, Emporia, Kans. W0WZL, Ray J. Boeckner, Cozad Nebr. W0ZBN, John E. Carpenter, Wheatridge, Colo. KH6JA, ex-W7BTG, Harper W. Skuse, Honolulu
January 1950
53
· SwipluA, (fonsix--
Plug-In Exciters from "Command" Transmitters
If you have a medium- or high-power transmit for some of the "extras" that go to make a more ter, you probably go through a fair-sized opera complete set-up. For example, in the unit shown, tion every time you change bands. Even if you a 2-inch modulation monitor patterned after the
bandswitch the exciter, you still have to change one described in a recent QST1 is included in the
coils in the grid circuit of the final, plus plate coils, chassis that accepts the plug-in exciter.
followed by a careful retiming process that is both The circuit diagram of a typical modified Com
time-consuming and bothersome, to say nothing mand transmitter is shown in Fig. 1. Note that
of being somewhat dangerous. Shown here is a the plate circuit of the second 1625 is link-coupled
system in which plug-in exciters, each containing to another tank circuit which is connected to a
a pretuned plug-in grid circuit for the final ampli three-terminal plug. This serves as the grid cir
fier, are made from the well-known "Command" cuit in the final amplifier. It is placed in the space
(SCR-274, ARC-6) transmitters. Similar set-ups formerly occupied by the antenna loading coil
are used at both W9UHF and W9ZHL to cover in the original set-up. The other changes in the
all bands from 3.5 through 50 Me.
original units are shown in the schematic diagram
The physical layout is shown in the accompany and depend largely on the output frequency de
ing photograph. The final amplifier occupies the sired. They are described below.
upper deck of a standard rack, and the lower deck The added grid coil is supported on 3-inch
is arranged so that the Command rigs can be stand-off insulators fastened to the chassis by
plugged into a slot cut in the panel below it. The screws that pass through the holes formerly oc
exciters are so compact you'll have room left over cupied by the loading-coil mounting screws. Plugs
made of salvaged knife switches with the blades
bent at right angles were mounted on the same
insulators, placed so that they would contact
jacks placed on the grid terminals of the tube
sockets in the final amplifier when the exciter is
plugged in. The bias connection (center tap) is
made of a banana plug mounted on a ceramic in
sulator supported through one of the holes in the
front panel left when the antenna relay was re
moved. The grid choke, by-pass condenser, etc.,
are mounted in the final-amplifier chassis, and
thus do not need to be duplicated for each unit.
This arrangement provided plenty of drive for
a pair of HK-257-B tubes in the final on the
lower-frequency bands, and enough for a pair of
715-Bs in the 50-Mc. final. The modifications to
the original Command transmitters to provide
the necessary drive in these various bands are
quite standard with the exception of the one used
to get to 50 Me. In brief, the modifications are as
follows:
3.5-Mc. exciter: One of the 3- to 4-Mc. trans
mitters was used, with one of the 1625 output
tubes removed. The antenna loading coil was re
moved and the grid coil for the final amplifier
installed as described above. Coil data appear
below the schematic diagram.
7-Mc. exciter: A 7- to 9-Mc. transmitter was
modified by removing one of the 1625s and the
An ingenious method of obtaining separate plug-in exciters for each band, devised by W9ÙHF and W9ZHL. The now-famous "Command" transmitters are utilized in a flexible arrangement that generates enough power
antenna loading coil as in the 3.5-Mc. unit, and
the grid circuit for the final amplifier was added
as in the 3.5-Mc. unit. _______
____
to drive a high-power final amplifier on all bands from
x" Built-in Oscilloscope for Modulation Monitoring,"
3.5 to 50 Me.
H & K, QST, April, 1948, p. 58,
54
QST for
Fig. 1 -- Schematic diagram of a typical plug-in exciter unit built from a "Command" transmitter. Parts des
ignated by symbols such as C59 and K72, etc., are already in the transmitter, and need not be changed. Values for new paits, with the exception of the coils and the final-amplifier grid condenser, are indicated on the diagram. Constants for these parts are tabulated below. Note that this circuit is used only in the 28- and 50-Mc. exciters. In all others only one 1625 stage is used.
Cg -- 3.5-, 7-, 14-, 28-Mc. units -- 50 ggfd. per section. --- 50-Mc. unit --- 27 ggfd. per section.
Li -- 3.5 Me. (not used).
...... 7 Me. (not used ).
-- 14 Me.-- 26 t. No. 14 enam., `·'¿-inch diam., close-wound.
-- 28 Me. -.... 22 t. No. 14 enam., ^-^-inch diam.. dose-wound.
-- 50 Me. -- 10 t. No. 14 enam., l¿-inch diam., dose-wound.
L2 -- 3.5 Me. (not used). -- 7 Me. (not used). --- 14 Me. -- (not used). -- 28 Me. -- 14 t. No. 14 enam., ^-inch diam.,
spaced to occupy IK in. -- 50 Me. -- 91. No. 14 enam., J^-inch diam., spaced
to occupy 1M in.
Ls -- 3.5 Me. -.... 861. No. 28enam., c.t., close-wound on
-inch diam. form. -- 7 Me. -- 431. No. 28 enam., c.t., close-wound on
5k-inch diam. form. -- 14 Me. -- 30 t. No. 14 enam., c.t., close-wound,
5^-inch diam. -- 28 Me. --16 t. No. 14 enam., c.t., spaced to
occupy 2 in., %-inch diam. -- 50 Me. ·--16 t. No. 14 enam., c.t., spaced to
occupy 1J4 hi., J ¿-inch diam.
14-Mc. exciter: A 7- to 9-Mc. unit was used with one of the 1625s serving as a doubler, the other omitted. In this case is not needed as enough drive can be obtained from one tube.
28-Mc. exciter: A 7- to 9-Mc. transmitter was used with one 1625 doubling to 14 Me., the other to 28 Me.
50-Mc. exciter: X 7- to 9-Mc. transmitter was used with the oscillator changed to operate at 12.5 Me. This is accomplished by taking a few turns off the 1626 grid coil and moving the cathode tap to ward ground until it tunes 12.5 Me. near the center of the scale. Turns are then removed from the fila ment winding until it is even with the cathode tap. With the oscillator on 12.5 Me. the first 1625 doubles to 25 Me. and the second to 50 Me.
The method used in changing the oscillator to cover 12.5 Me. can be employed in converting the 4- to 5.3-Mc. and 5.3- to 7-Mc. units for 7-, 14-,
21- and 28-Mc. exciter use if you can't obtain the units designed for use at ham frequencies. In all cases the dials can be recalibrated with your re ceiver and if more accuracy is needed, the calibra tion can be accomplished with the aid of a fre quency standard. Inexpensive crystals may be used in the tuning-eye circuit to indicate band edges, and in fact two crystals in parallel have been used to mark both ends of the band. -- T. Glade Wilcox, W9UHF, and Charles Hoeman, W9ZHL
SWITCH
TO SAFETY!
January 1950
55
The World Above 5Omc
CONDUCTED BY E. P. T* ILTON, W1HDQ
hough two .years have passed since the peak
Tof the current solar cycle, international DX on 50 Me. continues as if someone had for
disturbances. Under such conditions the m.u.f. may be high enough to permit 50-Mc. work be tween areas that appear to be completely outside
gotten to notify the ionosphere. A check of thethe realm of possibility when one checks them on
daily activities of HC2OT, YV5AC, CE1AH, the prediction charts. This phenomenon was first
OA4AE, OA4BG and LU9EV shows that only reported by G6DH,1 following his observations
three days in November were without some sort of m.u.f. variations on the path to South Africa in
of DX opening on 50 Me. in South America. Pos 1947. Our first evidence, in this hemisphere, of
sibly even these dates might have been filled in if the tie-in between aurora and north-south DX of
we had more complete information on the work an intercontinental nature came in January and
of the numerous LUs and PYs known to be February, a year ago. Probably the first American
active.
operator on 50 Me. to put this information to
Transcontinental openings in this country work was Bill Coburn, W1ELP, Cambridge,
during November exceeded those observed in the Mass., who made a point of watching the 6-meter
corresponding period last year and on the 20th band on the morning of Feb. 22nd, last, having
conditions were nearly equal to the best that seen the visible aurora the night before. He was
November, 1947, had to offer. This opening gave rewarded by the first 50-Mc. contact ever made
W6WNN, La Mesa, Calif., a contact with by a W1 with South America. HC20T was offici
W1CGX, Brattleboro, Vt., for what is believed ating at the other end.
to be the first 50-Mc. WAS by any operator out In the period since, every instance of South
side the Middle West. Contacts were made with American work on 50 Me. from the northern part
the Hawaiian Islands by West Coast stations on of the United States has occurred immediately
several occasions, and the first two-way work following an ionosphere storm. Taking it the
between South America and the Pacific North other way around, for each pronounced iono
west took place.
spheric disturbance observed in the spring and
By now it has become well recognized that fall aurora periods there has been some instance
extreme DX opportunities on north-south paths of 50-Mc. DX between North and South America.
may follow closely on the heels of ionospheric
A New WIAW Service
This well-documented connection between ionospheric disturbances and extreme north south DX on 50 Me. was one reason for the inauguration of a new ARRL service available to listeners on WIAW. Each evening following
the. regular bulletin transmissions on all bands, 1.8 through 144 Me., the latest information on
coming ionospheric disturbances is being given on WIAW. Based on information supplied by the Central Radio Propagation Laboratory of the National Bureau of Standards, this covers the dates of anticipated disturbances for a period two
weeks in advance. Normally the transmitted information is changed weekly, but occasionally'
What does a WIAW operator do in his spare time? This shot gives the answer in the case of Tom McMul len, W1QVF. This amazing structure, mounted on the roof of the Headquarters office building, includes 4-element 50-Mc., 6-eiement 144-Mc., 16-element 220-Mc.,
and 32-element 420-Mc. arrays. Photo by WT-RNT.
QST for
last-minute revisions come through, necessitating the changing of the transmission content relating to imminent disturbances.
Amateur operators of all types will find this information useful, but it is of particular value to the v.h.f. enthusiast. It has been demonstrated that these CRPL predictions are normally quite accurate, so v.h.f. men should have ample warn ing of aurora-reflection and north-south DX openings on both 50 and 144 Me. Get the W1AW habit now, if you don't already listen regularly. The operating schedule appears in every other issue of QST, with the latest information on page 68 of this issue. In addition to the short warnings transmitted daily, other news of interest to v.h.f. workers is transmitted from time to time. Watch W1 AW for the newest v.h.f. developments.
November Details
The month got off to a fine start with an evening of activity on the 1st that sounded more like June than Novem ber. Very short skip was in evidence over most of the coun try, with signals exhibiting a mixture of aurora and spo radic-# characteristics. An example of the coverage: Sta tions in eastern New England were hearing just about every state east of the Mississippi, plus VE1 and VE3, with signals coming in from as near as W2RLV, Honeoye Falls, N. Y., 300 miles to the west.
What is believed to have been the first contact between a station in the Pacific Northwest and South America was made the following day. That morning W3CIR/7, Bremer ton, Wash., had just finished raising his 6-meter beam, and following his first loading check he worked W6IWS at 11:05 a.m., followed by LU9MA, Mendoza, Argentina, at 11:10. W6IWS also worked LU9MA. The same noontime W2BYM, Lakehurst, N. J., worked LU4DI, who had just been working W6s.
W7s found the band open to Argentina again the following morning. LU1BV worked W7DYD, W3CIR/7 and W7JPA in an opening that ended for the W7s about 11 a.m. PST. The Argentine stations were also working into W6 at the same time, but details are lacking except for the report of W6TMI, who worked LU9MA and LU1EV between 9:55 and 10:12 a.m. The first transcontinental opening of the season also broke on the 3rd, with W2BYM and W1HMS working W6TMI.
HC2OT took the ball on the 5th and 6th, working W5s ML, PVR, VY and EMY on the 5th, and W6s TMI. OB. WSQ, and K6BF on the 6th, with YV5AC added during the evening. What was probably the first LU-VE 50-Mc. QSO linked LU9MA and VE7BQ on the 11th. HC2OT worked W9ZHL at 10:03 a.m. EST on the 12th and again on the 13th, along with W9JMS and W5EMY, in an opening end ing at 10:05 a.m. W1-W6 contacts were made in brief noon time flurries on the llth, 12th and 13th. The area over which these W6 signals were heard was very sharply de fined. Southern California W6s were heard working VE1QY by various Wls, but only those east of the Connecticut River. W1CGY, Enfield, Conn., was getting readable voice signals from W6s PUZ, TMI, IWS, and WNN on the 13th, while W1LLL and your conductor, only 16 and 20 miles, re spectively, to the southwest, were unable to make out more than very faint carriers. The east-west opening (by then an ex pected daily occurrence) showed up later on the 14th, with W1ELP, Cambridge, Mass., working W6FFF and W6CDQ after 2:10 p.m. EST. W2NSD, Brooklyn, N. Y. (encouraged to get started on 6 after listening to W1AW Bulletin 214) also worked W6CDQ, who was running only 7 watts input!
The period between the 14th and the 19th is devoid of DX reports from this country, except for what appeared to have been a sporadic-.# opening between XE1GE and the Texas W5s between 7:30 and 9 p.m. CST on the 15th. An aurora on the evening of the 19th set the stage for another fine opening to South America oo the 20th. and the gang
2-Meter Standings
Call States Areas Miles m 13 5 550 W1HDQ 13 5 480 W1BCN 12 4 500 W1CTW 12 4 500 W1REZ 11 4 W1JSM 10 o W1GJ0 10 3 W1JMU 9 3 W100P 9 3 W1QXE 9 W1MBS 8 2 275 W1AW 5 2
W2BAV 14 5 430
W2NLY 13 5 515
W2NGA 13 5
W2DFV 13 5 350
W2CET 12 5 405
W2WLS 12 4
W2DPB 12 5 500
W2QNZ 11 5 -
W2NPJ 11 6 500
W2PJA 10 4 ··· W2PIX 9 4
W2WGH 9 4
W2BNX 7 4 300
W2FHJ W2RP0
73 54
W2UTH 5 4 W2UXP 4 4
W3RUE 15 7 760
W3KBA 13 6
W30WW 13 6 600
W3GKP 13 5 610
W3KWH 12 6
W3KUX 12 5 575
W3PGV 11 5 ~
W3BLF 10 6 W3KWL 10 K
W3GV
9 5 660
W3HB
95
W3LMC 9 4
W3KWU 8 3
W3VVS 7 4 430
W5JTI W5ML W5AJG W5IRP W5FSC W5JLY
Call States Areas Miles
9 5 660 2 I 425 2 1 400 2 1 365 2 1 250 1 1 1*000
W6ZEM/6 1 1 415
W8UKS 18 7 720
W8WJC 18 7 700
W8BFQ 15 6 600
W8WSE 14 6 620
W8WRN 13 5
W8CYE 12 6
W8CPA 12 - 650
W8BAX
9 -
W8DIV
8 4
W8RDZ
7 4 340
W8WAB 4 4
W9FVJ 13 6 680
W9JMS 12 5 600
W9PK
W 5
W90BW 8 4
W9NFK
8 4 410
W9UIA
5 3 205
W0NFM 14 7 660
W0EMS 13 5 860
W0WGZ 10 4
760
W0IFB 9 6
W0BZE
8 4 520
W0HAQ
8 4
WODEN
7 4
520
W0ZJB
6 3
W0GOK 6 -
W0HXY 5 2
WHS
4 2
VE1QY
9 3 650
VE3AIB
8 F>
520
VE3BPB 6 4"
VE3ANY 4 -
W4IKZ 13 5 500
W4CLY 12 5 500
W4FJ
12 5 450
W4FBJ 11 5 --
W4MKJ 10 5 475
W4HHK 10 5 650
W4JFV 9 5 860
W40LK 9 4 500
W4ÜDG 9 4 500
W4JHC 8 4 500
W4AJA 8 4
W4NRB 8 4
W4FQI 6
W4KKG 5
W4LNG 4
W4DLX 3 1 275
* Crossband. Note to 2-meter operators:
If your listing is incorrect or incomplete, please send in tbe correct information. Also, how about more mileage listings from W6 and W7. and more information on leaders in W9?
turned up in force that Sunday morning. They did not have long to wait. At 8:50 a.m. EST HC2OT changed from 10 to 6 meters, and was heard by W1CGY and W1LLL in the process. Thus started another round of contacts -- a twohour session during which Steve brought the membership of the International Order of Tropical Tramps (you cross the Equator on 50 Me. to work HC2OT to join) to 115. Steve's list, in the order of the rapid-fire contacts: Wls LLL, CGY, ATP, HDQ (at last.!). CTK AEP. W4ITJ.T. W2BYM,
January 1950
57
Standings as of November 25th
W9ZHB
48 W5A.TG
47 W8QYD 44
W0ZJB
48 WSVY
47 W8CMS 39
W9QUV W0BJV
W0CJS W0WNN
48 W5JTI 48 WISTLY 48 W5ML 48 W5W
44 W8YLS 38 43 W8NQD 38 42 W8WSE 36 42 W8LBH 36
W5ONS
41 W8RDZ 27
W1CLS
45 W5FSC
41 W8RFW 25
W1CGY
44 W5HLD
40
WILLL
43 W5FRD
38 W9HGE 47
W1HDQ
42 W5DXB
35 W9ZHL 47
W1KHL
41 W5ZZF
34 W9PK
47
W1LSN
40 W5NHD 33 W9ALU 46
W1HMS W1GJO
38 W5GNQ 37 W&JBW
32 W9JMS 45 32 W9QKM 45
W1R0
36 W5I0P
30 W9RQM 44
W1ELP
36 W5IRP
29 W9UIA 43
W1DJ
36 WSLWG 26 W9UNS 42
W1JLK W1EI0
35
35 W6UXN
47 W0USI
47
W1HIL
31 W60VK
40 W0QIN
47
W1CGX W1FZ
31 W6IWS 27 W6ANN
40 W0DZM 47 38 W0NFM 47
W6BPT
35 W0INI
47
W2RLV
45 W6AMD 35 W0KYF 44
W2BYM W2IDZ
42 W6NAW 35 W0JHS 44
40 W6FPV
34 W0PKD 43
W2AMJ W2QVH
38 W6BWG K6BF
25 W0YKX 43 17 W0TKX 43
W2FHJ
33 W7HEA
W0SV
42
47 W0HXY 41
W30JTJ
44 W7BQX
45 W0IPI
39
W30R W3RUE
35 W7DYD 34 W7ERA
45 43 VE3ANY 38
VV3MKL
33 W7JRG
40 VE1QZ 32
W7B0C
40 VE1QY 28
W4FBH
45 W7JPA
40 VE3AET 27
W4EQM
44 W7FIV
40 HC20T 25
W4QN
43 W7CAM
40 VE4GQ
20
W4LNG
42 W7KFM
4U XE1GE
19
W4GIY
40 W7FDJ
36 XE2C
14
W4EID
40 W7FFE
35 VE2GT
14
W4EQR
40 W7KAD
35 XE1QE
10
W40PZ
39 W7ACD
32
W4DRZ
38 W7QAP
32
W4MS
38 W3CIR/7 32
W4FQI
34
W4GMP 34
W4WMI 33
W4FNR 33
Calls in bold face indicate holders of special 50-Mc. WAS
certificates, listed in the order of the award numbers. All
other listings are based on unverified reports.
W3MXW, VE3AJJ, W5VY, W4CVQ, W2RLV, W9PK, W9JMS, W8EAG, W8CMS, W8NQD, W3QFL, W9MBL, W9ZHL, VE1QZ (first VEl OSO with South America?), Wls RO. HDF, QVF, DJ, GJO, HMS, W2AMJ, W1BWJ, W1CLS.
The signal from HC20T was audible throughout the entire period at W1HDQ, though only during the contacts with this area was he at maximum strength. We took these opportunities to make test transmissions on 50.0, 50.2, 50.4 and 50.55 Me., to determine whether there was any point in crowding the low edge under such conditions. Steve noted
no loss in signal strength, and reported that during the 50.55-Mc. test ours was the only signal coming through anywhere in the baud -- and that at 89 plus 20 db! M.u.f. checks earlier had shown nothing coming through above about 40 Me. --- was this another example of the band opening "from the top down"? You may remember that G6DH occasionally used to hear IT. S. f.m. stations around 45 Me. when nothing else was coming through from this country higher than about 25 Me.
The South American business was over at 10:55 a.m. EST, but by 11:15 the W6s began to pop through, and until 1:45 p.m. there followed such a session of transcontinental communication aw has not been seen on 50 Me. since the best days in November, 1947. It would be impossible to list a fraction of the contacts made, with upward of 30 W6s banging into Wl, 2, 3, 4 and VEl. Power seemed of no account, and several W6s using 3 to 6 watts input were coming in with the best of them. Frequency mattered little, too; signals up to 51.2 Me. were as strong as on the low edge. There is little doubt that much higher frequencies could have been used, had anyone been looking higher. The skip was as short as 2000 miles. W1CLS reports working W5s ESZ and LKP, El Paso, Tex., and W7s QLZ and MOW. Phoenix, Ariz., were working plenty of Wls.
From this part of the country it was all in that direction, but the familiar "X" pattern of the 1947 openings was in evi dence. W7JPA, Yakima, Wash., worked W4IUJ, West Palm Beach, Fla., and W4FT, Wilmington, N. C. W3CIR/7 worked these and W4CVQ, Fayetteville, N. C. VE1QZ worked W5s ESZ and LKP in El Paso, and ZZF in Big Spring, and heard (but could not work) numerous W6s and W7QLZ. The farthest south reported by the W6s was W4FT and W4CVQ, worked by W6IWS.
The opening to the East lasted from 8:45 to about 10:15 a.m. PST for the Washington W7s, but at about 3:30 W7JPA began to hear another weak signal coming through. This was thought to be one of the Seattle gang until he switched to c.w. and was identified as KII6NS, in contact with W7EV0. Ed was raised at 2:50, and W7JPA was able to hear w'eak signals on the frequencies of KII6PP and KH60V shortly thereafter. W3CIR/7 also worked one or more of the KH6s.
No W DX was reported thereafter until the 24th, when there was a short W1-W6 opening around 1 p.m. EST. Throughout November the m.u.f. seemed to be rising to nearly 50 Me. in other directions, and it is believed that contacts might have been made between eastern stations and Alaska, had activity been available there at the right times. Day after day eastern observers (including your conductor, operating W1QVF during lunch periods) heard frequencymodulated tone signals coming through from the northwest on 47 to 49 Me., often with very high signal levels for one to two hours after noon EST. On one of these days, during a check with W1CGY, Clarke's signals were heard by W7FIV, but otherwise no reports have, been received to tie in ama teur work with this evidence of high m.u.f.
The last date on which we have information as we write is Nov. 27th, and we hear from CE1AH that KH6PP and LU9MA worked during that evening. Ida says that the band was open for at least eleven hours, beginning at 11:20 a.m. on the 27th, with the LUs in all day and OA4AE appearing around noon. HC2OT heard nothing whatever the entire day.
We wish we had space to present the entire month's ob servations as reported in detail each morning on 28 Me. by HC2OT, YV5AC. CE1AH, OA4AE, OA4BG, LU9EV and others. Great credit is due our South American friends for their persistent effort and careful observation on 50 Me. Faced with a complete lack of local contact« that would discourage many of us. these hardy souls watch 50 Me. at every opportunity. It is safe to say that few DX chances get by them; our knowledge of what happens on 50 Me. is being enriched thereby, and operation on the band is being made more interesting for us all.
· Third Annual V.H.F. Sweepstakes--January 21st and 22nd! Complete dope on page 52. Send for report forms today.
58
QST for
Here and There
Santa Barbara, Calif. -- When he relinquished XE1KE and returned to live in Santa Barbara as K6BF, BJ thought he was losing out. on some of his 50-Mc. fun, but he's been doing all right. In addition to 17 states, K6BF has worked ZL4GY, ZLls HP, MN, AO, TO, ZL2DS, LU9MA, LU6D0, LU4DI, LU1BV, and KH6s OV, NS and PP.
San Francisco, Calif. -- Activity on 50 Ale. is on the in crease in the Bav area, according to VV6BUR, who lists W6s GCG, NIO, DQY, AJF, CAN, VNH, UOV, WK, JYR, VQV, DEG. VEV, JKN and ZBS as the troup presently on the band. Activity is concentrated on Monday nights, but anything interesting that develops over a week end will find a goodly number of those listed above in there pitching.
There is extensive net activity on 144 Me. The Bay Area Contact Schedule Net operates on 145.35 Me. each Thurs day evening at 8 p.m. with W6VNI as control station. The Sunday morning net activities previously mentioned in this department continue, and a Red Cross Emergency Net, with W 6CHP as net control, is in the process of formation. W6VNI, Oakland, has been running successful skeds with W6JCI, Monterrey. 150 miles, for nearly two years.
WfiGCG and W6BUR also have gear for 220, but have had no contacts as yet. They would be glad to hear from others interested in that band in the Bay area. On 420 the accent is on television. W6VSV has been on the air for some time. W6VQV has a receiver and is working on transmitting equipment. W6VSV transmits his "sound channel" on 144 Me. W6WCD is transmitting, and W6U0V has camera equipment nearly ready to go. Other 420-Mc. regulars in clude W6KNH, who is experimenting with f.m., and W6QT, Berkeley, who runs crossband with W6AJF at Sonoma on 144 Me. with good success.
Collierville, Tenn. -- The 144-Mc. pipeline between the Memphis and Jackson, Miss., areas having operated suc cessfully for several months, W4HHK, W5JTI and W5NYH now have gear in the works for 220 Me. They are also inter ested to see whether the advancing cold weather will have any effect on the consistent nature of their 144-Mc. com munication. Up to now' their schedules continue without failure on this 190-mile hop.
Rochester, N. Y. -- VE3s in the Toronto area were worked on 144 Me. by Rochester stations throughout the fall period, whenever there was activity at both ends. W2UTH maintains a regular schedule with VE3ANT, 95 miles, each Tuesday at 8:30 p.m., and with W2UHI, Tonawanda, N. Y,, 60 miles, at 9. The first 2-meter contacts between Rochester and Syracuse, N. Y., were made recently when several Rochester stations worked W2UFI/2 and W2SEB in Syracuse.
Salina, Kans. -- There is more 2-meter activity in Central Kansas than recent reports have revealed, according to W0PKD. Joe says that he and W0QDH and W0MVG are on regularly, working W0JFE at Abilene. Anyone looking for contacts with that part of the country should check at 9:15 p.m., when some of the gang are usually on. The usual operating frequencies are about 144.1, though others are available when the occasion requires.
Queens Village, N. Y.......Anyone who has held back from trying 2-meter operation because he felt that nothing could be done without a large array will be encouraged by the record of W2BNX. He has worked over 500 different stations in 7 states and 4 call areas -- with 8 watts output and a dipole antenna.
Charlotte, N. C. ....- North Carolina contacts on 2 meters coming upl W4DLX (brother of W4CLY, of Cape Henry I lighthouse fame) is now in business on 2. He has three states and 275-mile DX to his credit, and he should be heard from, come a good opening in most any direction.
Columbus, Ohio -- Morning schedules between W8WRN and W9FVJ, Toledo, Ill., will be continued throughout the
winter on 144 Me. Sked time is 7 a.m., but VV8WRN is around until 7:30 and W9FVJ until 8. Each Thursday morn ing W8WRN works W9ASM, Indianapolis, at 8 a.m. W9UCH, Ft. Wayne, is worked nearly every night.
Los Angeles, Calif. -- Anyone who has tried to key a 522, w'hen only one power supply is used on the rig, knows that the voltage shift causes a considerable chirp, even though the keyed circuit (usually the cathode of the final) is remote
rom the oscillator. W6ZUX uses a VR-90 and a VR-150 in series to supply the oscillator plate and screen voltage at a constant level to correct this trouble.
At the November 4th meeting of the Two Meters and Down Club there was an extensive discussion of the 2-meter polarization question, with an eventual decision to chang? over to horizontal polarization by December 1st. This will be the first extensive use of horizontal on the West Coast. With the large number of stations involved, results should be of considerable interest. Their propagation problems are somewhat different from those or other sections of the coun try, in that many paths are worked by means of reflection from distant mountain ranges. There is also a greater per centage of mobile activity than in most other areas. If the W6s make out well with horizontal as a standard it should be successful in any section of the country.
Sacramento, Calif. -- There are propagation peculiarities in the Sacramento Valley, too, says W6PIV. Ken reports that some stations only 50 miles to the south are heard only a small percentage of the time, whereas others 100 miles or more distant, with high intervening hills, are worked regu larly with good signal strength.
A combination of 29.4-Mc. f.m. portables and 144-Mc. mobiles under direction of W6KME provided communica tion for the boat races on the Sacramento River on Oct. 30th, providing a good workout under conditions closely simulating those of emergency communication.
The World Above 420 Me.
Interest in 420 Me. in the region around Springfield, Mass., received quite a boost on. Nov. 12th, when W1MEP and W1NH, operating from the summit of Mt. Greylock, in the northwest corner of the state, worked W1CCH in Springfield and heard W1AEP. Though Greylock is the highest point in Massachusetts, it is not line of sight into Springfield, and it used to be considered quite a feat to work Springfield stations from there on 5 meters in your conductor's mountain-climbing days, back in the early '30s.
W1MEP is also on 420 from his home location in Ben nington, Vt., but up to now he has not been able to get out from that location, surrounded as it is by high hills. He works stations in Schenectady and Albany regularly ou 144 Me., and has conducted 420-Mc. tests with W2WFB while in contact on 144, but nothing has been heard either way as yet on 420. Chet uses a BC-788 with a square-corner reflector array.
There is considerable activity on 420 in northeastern Ohio, according to W8SR, of Alliance, who dropped in at Headquarters recently. He tells us the W8s VO, Akron, DDB, Alliance, OQE, Youngstown, MQW and NB, Barber ton, are working out on 420 regularly.
By now it has been pretty well established that we can make some conventional tubes work in more-or-less con ventional circuits on 420 Me. They don't set the world on fire, but they do work. How then about the next higher band, 1200 Me.? Some time ago we showed a 1200-Mc. oscillator built by W3HFW and W3MLN, using a 703-A tube in a line oscillator. W6CFL has been working with a set-up like this, but with inferior results to date. Up to now he's not been able to do more than light a 60-ma. pilot light, but he's still trying. Does anyone else have experience along this line?
January 1950
59
A.R.R.L. QSL BUREAU
The ARRL maintains a QSL bureau system to make it easy for you to receive your DX QSL cards, but in order for it to function it is necessary that we receive your cooperation. All you have to do is send the QSL manager for your call area a stamped self-addressed envelope of the No. 10 stationer's size (No. 8 post-office size), with .your name and address in the customary place and your call letters printed prominently in the upper left-hand corner. When he has an envelope full of cards for you, he'll return the envelope to you. Upon receipt of that envelope, be sure to send him another.
If you've previously held a different call, send an envelope to the manager for that call area. If you have been operating portable, remember that all QSLs for such operation are routed via the home district.
Do not send cards for other W or VE stations for distribution via the QSL bureau; they cannot be accepted. Likewise, do not send cards for distribution to foreign stations via this domestic QSL bureau system. For the addresses of the proper bureaus to which foreign cards may be sent, see page 61 of December, 1949, QST.
This QSL bureau handles only incoming DX QSLs.
Wl, KI -- Frederick W. Reynolds, W1JNX, 83 Needham St.. Dedham, Mass.
W2, K2 -- Henry W. Yahnel, W2SN, Lake Ave., Helmetta, N. J.
W3, K3 -- Jesse Bieberman, W3KT, Box 34, Philadelphia, Penna.
W4, K4 -- Johnny Dortch, W4DDF, 1611 East Cahal Ave., Nashville, Tenn.
W5, K5 --L. W. May. jr., W5AJG, 9428 Hobart St., Dallas 18, Texas
W6, K6 -- Horace R. Greer, W6TI, 414 Fairmount St.. Oakland, Calif.
W7, K7 --Mary Ann Tatro, W7FWR, 513 N. Central, Olympia, Wash.
W8, K8 -- William B. Davis, W8JNF, 4228 W. 217th St., (.'leveland 16, Ohio
W9, K9 -- John F. Schneider, W9CFT. 311 W. Ross Ave.,
W0, K0--Alva A. Smith, W0DMA, 238 East Main St.. Caledonia, Minn.
VE1 -- L. J. Fader, VE1FQ. 125 Henry St.. Halifax, N. S. VE2 -- Austin A. W. Smith, VE2UW, 6164 Jeanne Mance,
Montreal 8, Que. VE3 -- W. Bert Knowles, VE3QB, Lanark, Ont. VE4 --Len Cuff, VE4LC. 286 Rutland St., St. James,
Man. VE5 -- Fred Ward, VE5OP, 899 Connaught Ave., Moose
Jaw, Sask. VE6 -- W. R. Savage, VE6EO, 329 15th St., North, Leth
bridge, Alta. VE7 - H. R. Hough, VE7HR, 1785 Emerson St., Victoria.
B. C. VE8 --Jack Spall, VE8AS, P. O. Box 268, Whitehorse,
Y. T. KP4 -- E. W. Maver, KP4KD, P. O. Box 1061, San Juan,
P. R. KZ5 -- G.Z.A.R.A., Box 407, Balboa, Canal Zone KH6 -- Andy H. Fuchikami, KH6BA, 2543 Namauu Dr.,
Honolulu, T. H. KL7 -- J. W. McKinley. KL7CK, Box 1533. Juneau.
Alaska
Military Amateur Radio System
Thousandth MARS Member Is Well-Known Test Pilot
MARS-Army is proud of its 1000th member. Reaching the 1000 mark was a noteworthy event in the life of the. fledgling organization, but it was the stature of the candidate which really made the buttons pop as MARS officials recorded and approved the application of Captain William V. Davis, jr., USN, A3OSM/W3OSM. Captain Davis is director of flight test at the Naval Air Test Center. Patuxent River. Md. He has been a ham for 32 years and started aircraft radio operating in 1924. On September 21, 1949, he received the "National Air Council Award for Naval Aviation Experimentation and Research for the Year Ending 30 June 1949." The presenta tion was made in Washington by Secretary of Defense Louis Johnson.
Thousandth MARS member, Captain William V.
Davis, jr., USN, A3OSM/W3OSM (second from right),
receives National Air Council award from Secretary of Defense Louis Johnson. Also shown are John Dwight Sullivan, NAC executive vice-president, and Captain Vincent Mazza, Air Force award winner.
Known to the public as the man who winds up the new jet buggies and puts them through their paces for the Navy, Captain Davis is also known in the ham fraternity for his contributions in the fields of antenna design and experimen tation. He belongs to MARS, the ARRL, and the Naval Air Patuxent Ham Club (W3PQT).
Captain Davis operates 40 and 10 meters. He is on the air with an ART-13, power input 140-160 watts, Al and A3 emission. His receiver line-up is three ARC-5s in cascade. He uses a cubicle quad on 10 and an off-center-fed on 40.
Captain Davis is a native of Savannah, Ga., agraduateof the Naval Academy (class of '24), and holder of the Dis tinguished Flying Cross and the Legion of Merit.
He participated in the Dole Air Races in 1927 and became the first Naval officer to reach the Hawaiian Islands from the mainland by air. During the late war he served with the staff, Commander Aircraft, Central Pacific Force, was deputy chief of staff for operations, Commander ShoreBased Air Force Forward Area, Central Pacific, and in 1945 was chief of staff, Headquarters Strategic Air Force, Pacific Ocean Areas.
What's in a name? MARS chiefs don't know, but it is true that the first MARS member was also named Davis --A4NGX/W4NGX. Also, both members are from the Sec ond Army Area. The two amateurs are not related.
60
QST tor
Correspondence From Members-
The Publishers of QST assume no responsibility for statements made herein by correspondents.
N.F.M.
Rural Radio Network, Inc., 118 North Tioga, Ithaca, N. Y.
Editor. QST: It is felt that most hams are missing the boat in not fully
exploiting the field of narrow-band f.m. which has been fighting an uphill climb since some of the fraternity started using it. This because most of the gang were still trying to receive the n.f.m. signals on conventional a.m. receivers, without the aid of a simple converter. A look at some of the commercial n.f.m. systems might convince some of the "die-hards."
One of these 152-162 Me. systems is in operation here. With a quarter-wave ground-plane antenna on the roof of a Jeep and 40 watts input, we work our control stations regu larly over distances exceeding 125 miles. Remember, no directional antenna at either end. Also, the degree of quieting at the receiving end is a thing that can't be duplicated with normal a.m. equipment.
The reason for this type of reception is easy. Good " hot" ham converters and receivers on the market can boast any where from 3 to 1 microvolts sensitivity, for a 6-db. quieting of background noise. A look at the "specs" on most of the present day n.f.m. taxi two-way radio receivers will show a claimed sensitivity of under 0.4 microvolt for 19-20 db. quieting. It isn't difficult to imagine what a fellow could do with a receiver possessing this sensitivity, especially if he were out to set a DX record.
It requires anywhere from 12 to 16 tubes and usually a double-conversion circuit to attain this degree of reception, but the average ham with the average superhet equipped with an n.f.m. converter can get many of the advantages for himself.
So far we have talked reception. There are some equally good advantages in the transmitter end of n.f.m. It's pos sible to put 40 watts of transmitter complete from micro phone plug to antenna connector on a 4 X 8-inch chassis, without the use of single transformer or choke.
Power requirements are practically the same for an n.f.m. as they are for a c.w. transmitter of equal power, nutting down the size of the power supply. Because of the almost complete lack of audio equipment involving transformers, etc., the saving in weight is sizable.
I'd like to suggest that more of the fellows build a simple two-tube n.f.m. converter, get it operating, and then after receiving some n.f.m. signals, I'm sure they will do the whole job, by converting the transmitter too. It would seem to be the duty of all the gang who are using n.f.m. at the moment, to encourage fellows to use converters, rather than continue to "tune off to one side." The recently-started practice of some set manufacturers of supplying matching n.f.m. adapt ers for their sets is laudable, and will help the cause a great deal.
I'd be interested in hearing from some of the rest of the fraternity on this subject.
-- William B. Perkins, WSVEN
TEN C.W.
527 Bedford Ave., Brooklyn 11, N. Y. Editor, QST:
I am trying to accomplish a good deed and at the same time have lots of fun. You see, for us fellers who live in the city and are surrounded by television " trees," the ten-meter band is a dead duck in the early evening. Although my rig
is literally TVI-proof, it is useless to try to convince my land lord, who has a TV set, that the cause of his interference is attributable to many other factors.
However, ten meters is still a swell band in the fact that not much antenna space is required, low-power equipment, etc. After 10 p.m. the band is still there for the asking. TV programs are just about over. It may be true that DX is not an easy find, although the writer did work a number of DX stations much after ten. But the real shame is that the tenmeter c.w. band is kept dead as a duck nights. The writer is now doing his utmost to get a local group going on ten c.w. This will keep much QRM away from the other bands too. Thanks to such fellers as 2PAN, 2QHU, etc., a start is being made in this direction. For new hams this band will really give them plenty of c.w. practice as well as a chance to make friends with other local hams.
Come on, fellers, let's get the ten c.w. band going. And to the first W6 I work after dark on ten c.w. (after this letter appears) I will send a suitable souvenir.
-- Gerald Samfofsky, W2YSF
QST
Vassar College, Poughkeepsie, N. Y. Editor, QST:
I think you have done a good job in spreading the articles among the various subjects. Don't let anybody tell you that the technical articles are too technical. I succeeded in ex plaining an article about which there were complaints to a boy in the eighth grade. . . .
-- Hardison J. Geer
VOL. I, NO. I
195-08 42nd Ave., Flushing, N. Y. Editor, QST:
Many hams like myself are making collections of QST. I have a pretty complete file from 1920 to date. However it is very hard to obtain issues prior to that. Here is my sug gestion. Can the ARRL reissue copies of No. 1 issue of QST, say in photo-offset or some other method, and either sell the issue, or perhaps give it out with all renewals? Perhaps one copy could be issued each year or 6 months.
What do other hams think of the idea? -- Robert Cobaugh, W2DTE
AMATEUR FRIENDSHIPS
Box 919, Dhahran, Saudi Arabia Editor, QST:
Every amateur makes countless friends over the air, some of them in faraway places that he would not expect to be able to visit. So I feel very fortunate in having been able to meet and to know in person amateurs in South and East Africa, and in Italy. They have shown true kindness and hospitality.
In Florence, Italy, I met an old friend whom I'd con tacted from California and Africa, and had corresponded with -- Dr. Grossi, or Lucky -- Il KN. Besides visiting his station and talking about old times, we occupied many hours of his time as he helped Cobi and me through most of the paper work and translation involved in being married in Florence. She being from Holland, the OM from the U.S.A., and with neither of us knowing Italian there were numer ous complications. Half the attendance at the wedding
(Continued an page 1^0}
January 1950
61
a ·w Sifel
Operating News
a a
a
F. E. HANDY, WIBDI, Communications Mgr. JOHN E. CANN, W1RWS, Asst Comm. Mgr., C.W. GEORGE HART, W1NJM, Nail. Emerg. Coordinator
J. A. MOSKEY, WIJMY, Depuiy Comm. Mgr. 4 L. G. McCOY, W1ICP, Asst, Comm. Mgr., 'Phone
LILLIAN M. SALTER, Administrative Aide
Mobiles Needed! Mobile operation is on the increase. We hope that every EC will put on a drive to make sure that every ham who has a mobile or car-installed rig of any description or frequency capability is asked to carry an Emer gency Corps card. The ability to carry the
communication to the spot needed is important, whether by means of "sets with handles" or mobile installations. Mobile capabilities offer a challenge to every amateur. However, dyna
motors at giveaway prices have brought the problem of emergency power "as near as your car battery." The fun in taking amateur radio gear along on one's vacation has been com pounded by the liberality of the FCC in extend ing our rules to permit mobile on all amateur band frequencies following request for this by the League's Board of Directors just a year or two ago. All amateurs in the process of planning and rebuilding are urged to give due thought to emergency power and mobility . . . the cir
cumstances in which communication offers the most and radio alone can do the job in hand.
Club TVI and BCI Committees. Each radio
club can give top service to its members by maintaining an active interference committee and centralizing a complete kit of typical highpass and low-pass filters with availabilities of calibrated devices (such as converters, grid-dip
meters and Little Gem type indicators) readily capable of showing transmitter or circuit condi tions in the TV frequency ranges. If expedient
the club treasury should support a program to make centralized stocking of such measuring
devices possible. The committee of an odd num ber of members (5 or 7 usually suggested) should
include one or two prominent TV-BC set owners, technically-skilled amateurs, and members keep ing contact with the local press for necessary reports on the activity of the group. This makes a nicely balanced team for the public relations
and amateur programs necessary. Technical talks and demonstrations of TVI reduction should be scheduled by the club interference committee and usually fit into the program
committee's desires nicely. After an initial TVI committee study of the following suggested ARRL material, any additional copies that can be used may be requested of ARRL. Radio club
committees are invited to write the Communica
tions Department for one copy each of the following ARRL mimeographs: (1) Typical Solu tions to BCI; (2) BC Interference, Sources and Remedies (ice-breaker stressing results from co operation); (3) Television Reception and In
terference (FCC 48-1803 General Information Release); (4) About Television Reception (TVI-
ice-breaker, suggestions and facts for the TV-reeeiver owner); (5) TV Interference Remedies.
Collaboration with the U. S. Weather Bu
reau in Emergency. A recent conference with
U. 8. Weather Bureau personnel in Washington reviewed the progress of the arrangements in stituted a few years ago for collaboration between amateur operators and weather observers in specific forecasting regions. Representatives of the Bureau were enthusiastic concerning the progress of some ten networks under appropriate ARRL regional coordinators. Besides approv ing the continuance of all such present facilities, the conferees examined the feasibility of calling on amateur networks shown in the Net Directory for the dissemination of emergency warnings and forecasts. In the event of failure of incoming and outgoing facilities from key areas that might be affected by unfavorable seasonal con tingencies this might become important. At the conclusion of a two-day conference in which ARRL explained amateur operational poten tialities, it was agreed that the weather data collecting and forecasting organization would inform its key points throughout the nation of recommended methods of emergency use of amateur radio. Likewise there will be issued through the League to its basic list of ARRL section officials and registered-net operating lead ers, information on which collaboration in the national interest might be based should occasion for emergency communications arise.
DX Contest Note to All Foreign Amateurs.
This is a plea . . . please state at all times where you are going to tune when you call CQ DX or QRZ?, but especially do this in the coming ARRL DX Contest! There are several ways to give your tuning plan. The new method of doing this ii
gaining in popularity. (1) CQ DX 75U de VK9ML 75U K (c.w. example) becomes "Answer 75 kilocycles up from my frequency, go ahead" when using voice. Some amateurs like a broader
specification than 50U or 50D for 50 kc. up or
62
QST for
down. (2) There's the older ARRL procedure of "tuning HM, ML, LM,ete." (for high-to-middleof-band, middle-to-low, or low-to-middle). (3) W2TXB writes, "If our DX fone operators would only state that they were going to tune the VE band, or from the bottom of the Ameri can band down, or the top of the American fone band up, then all the Ws would not call them and cause QRM to each other." Here is a simple way to reduce that QRM level!
Activities! We start the year with plenty doing. This QST carries the announcement of the V.H.F. Sweepstakes, a Ten-Meter (WAS) Party and a Frequency Measuring Contest, all for January. Advance information on the DX Contest is given to reach overseas points before the Feb ruary-March test. Best of luck and good oper ating!
-- F. E. H.
SO NOW YOU'RE CLASS A
From time to time one sees articles giving advice to prospective hams but I have yet tn see anything written to help the holder of a Class A ticket. I contend there is a crying need for such advice, particularly in regard to 75 meters. If you doubt it just listen around for a while. After all, 75 is the band of nets and round tables; observance of proper procedures and courtesies is essential. With one swish of a VFO it is possible to QRM three nets, a round table and the neighbor's BC program, thus annoying upwards of one hundred people simultaneously. Some seasoned Class A operators have this technique down to a science.
Take the problem of breaking into a round table; there are several systems. One of the less popular is to tune up the final a few kc. off the frequency and then zero beat the VFO with the final dead. Just as one station is turning it over to the next, you break in with a quick short call. This system
will get you in the QSO without any trouble, but it will also mark you as a green operator. Nobody who is anybody uses this outmoded technique.
One of the preferred systems is to zero beat, then tune up the final on the frequency. This will let the members of the round table know that somebody wants in. They will probably take a stand-by for you on the next transmission. However, don't show your ignorance of 75-meter procedures by calling in when they stand by for you. Wait until the next man starts his transmission; then break in with a call. Al ways call the station that is making the transmission. Naturally he can't hear you while he is on, so won't answer. This gives you an excuse to call again in a few seconds. Keep calling until one of the other members of the round table acknowledges you. Once in a round table the idea is to keep others out. Be very quick on the switch when your turn
comes up, thus making it impossible to call in between trans missions. If someone does manage to get in, make him wait a full round before giving him a chance to talk.
Then, there is the 'phone net procedure, which is quite different from c.w. net work. When you are new on 75 the best way to get on your section net is to listen to the roll call until you hear some friend of yours answer in. You im mediately jump right in with all four feet and give him a long call. He will probably come back with a short snappy transmission and tell you to QRX. Stick around and every time that you hear a familiar call give him a blast on the net frequency. This is a good way to build up your reputation among the net members. They will be certain to remember your call. When you decide to report into your net regularly the best way is to call in on the stand-by period or when you are called on the roll. I know this will stifle your originality, but if you want to have any contacts with any of the other net members, you will have to put up with it.
Of course it goes without saying that the rig should be. tuned on the net frequency, preferably after the roll has started. If you happen to be late, the proper thing to do is to wait until some traffic is being handled before you throw on the carrier and tune up. Wait a minute or two. then break in and say that you would have called in before but didn't think that you could get through the unmodulated carrier on the frequency. If you wish to make a schedule with some other member of the net, don't show your immaturity by telling the NCS when you check in. Just go ahead and call him -- that much more QRM won't matter.
Ab for traffic, don't bother with putting your messages in regular form. That is just for the c.w. ops and greenhorns. By all means don't use a regular phonetic list for clarity. The more you can foul up your messages the more fun the other guys will have trying to decipher them.
In 'phone net procedure you do not turn it back to the net control when you have cleared your traffic with another sta tion. Instead, you engage in a ragchew with the station you are in contact with. The trick is to make your conversation sound as if each transmission would be the last so that the net control won't QRM you. He will think you are going to sign any minute, but of course you drag it out as long as possible. When you can't keep tins up any longer you come out with, "Say, is the net over? Maybe we better turn it back to net control and find out.''
There are a thousand-arid-one ways of annoying a net control. The naming of a few more favored ones will have to suffice: -- Always run your before-net QSOs about a minute overtime. If your net has a good reliable control station make remarks to the other fellows about, "Certain people trying to hog the job." If the NCS is late or absent, get on the frequency and call loudly for net control. BUT, remem ber this, never, never, NEVER, accept the job of NCS yourself. It's just a sucker job, and anyhow your time is much too valuable.
The neophyte Class A operator is faced, upon completion of a modulator, with the problem of whether or not to con tinue his c.w. work. The pros and cons of c.w. for the Class A operator are beyond the scope of this article. There is no unanimity of opinion, upon this subject among my acquaint ances ; however, a few words are in order.
The strictly 'phone man can speak in sneering terms about c.w. operators, implying that they haven't the brains to build a modulator. The one who continues on c.w. can casu ally mention his c.w. work with an air of self-righteous superiority, implying the 100 per cent 'phone men are too muddle-minded ever to concentrate on a code speed above 10 words a minute. You can see from this that either course has its compensations. If you do choose to continue c.w. operation you can show your Class A originality even on the c.w. bands. Such tricks as having the weights on your bug set for a speed at least thirty per cent faster than you can send and applying aforementioned 'phone net tactics to c.w. will quickly build up your rep.
Now, my newly-weaned Class A Ham, you must decide. What kind of a Class A operator are you going to be? Are you going to muddle along with the old Class B habits, or are you going to be one of the boys? If you faithfully follow the rules set forth herein, you need have no doubts about the kind of reputation you will earn!
-- Sidney L. Markusen, W0BGY
January 1950
63
OCTOBER CD QSO PARTY
The number of whopping big scores listed in the tabula tion below is a good indication of the degree of activity that prevailed in the October CD Party! It was a bang-up affair that gave CD appointees a fine opportunity to warm up for the November Sweepstakes.
Another CD Party is scheduled for the week end of January 28th-29th. Any holder of an ARRL appointment or office will be eligible to participate. If you're interested in organized operating activities, and do not already hold an appointment, look over the list of such appointments in the booklet Operating an Amateur Radio Station (sent gratis to League members upon request) or the Handbook and decide which suits your particular interest and qualifications. Then write to your SCM or League Headquarters for complete information on how to receive the appointment of your
choosing.
Different
Station
Score
Contacts Stations Sections
W6WNI
840,632
337
217
57
W1E0B
831,720
471
291
57
W4KFC
765,260
454
274
58
WITCH
730,380
440
273
56
W9BRD
719,875
436
265
60
W9RQM
710.600
434
263
60
W3HRD
660,440
413
263
53
W8ZAT
648,064
284
187
57
W2GFG
638,520
401
258
55
W8GBF
499,565
334
233
60
W3GRF
498,015
350
226
53
W7ZT
490,194
241
173
53
W4IA
478,055
320
236
57
W7KWC
477,990
226
179
56
W3GJY
466,640
300
244
60
W4BZE/4
424.320
307
219
53
W2CWK
415,800
309
213
51
W3LIW
408,965
311
214
49
W4KYD
390.600
304
201
51
W4LRI
390,150
306
202
53
W4NNJ
361,400
253
229
49
W9WEN
346,675
277
191
54
W9NH
345,630
275
190
56
W2KUS
334,620
286
189
45
W1LHE
331,540
268
192
50
W6BIP
322,361
194
124
57
W0DYX
317,200
255
188
56
W2NIY
312,390
261
186
48
W1QMJ
308,385
260
183
48
W7KGJ
306,528
162
162
44
W5NGN
305,830
251
185
53
VE3WY
303,260
250
184
52
W1CRW
292,740
246
182
56
W9CBE
292,365
260
171
48
W2ZVW
289,685
246
181
48
W4NJV
277.500
244
172
50
W6APG/8
269.600
147
147
53
W9DKV
265,825
210
210
35
W2KEL
264,000
235
173
47
W1AQE
261,485
217
193
48
W8ZJM
250,475
227
159
60
Others with scores over 150,000: W9DJV 249,900, W4ILE246,240,
W8TZ0 245,310. W9UKT 241,755, W6VAQ 239,896, W3JHW 237,-
015, W8DAE 233,160, W8JM 231,650, W3BWL 224.770.W2OBU
224.720. W8TAQ 222,750, W2VJN 221,625, W8ZAV 221,325, W1CJH
218,225, W1AW 209,880, W2LPJ 195,025, W6RFF 192,820, W1HUM
191,235, W9QLW 190,950, W8N0ÏÏ 189,520, W0FQB 183.120, W4FF
174.800, W2PRE 165,120, VE2GM 164,900, W70AP 160,020.
YL-OM CONTEST
What promises to be the most interesting contest yet sponsored by YLRL is the YL-OM Contest, in which all OMs are invited to participate. DATES: 'Phone, January 21-22, from 7 a.m. CST on the 21st to 12 p.m. CST on the 22nd, on 75, 20 and 10. C.w., January 28-29 as follows: 28,000-28,100 kc.. 14,050-14.150 starting 7 a.m. CST on the 28th and ending 7 p.m. CST on the 29th; 3600-3700 kc., 7100-7200 kc., starting 7 p.m. CST on the 28th and ending 7 a.m. CST on the 29th. On 'phone call "CQ YL-OM
Contest," and exchange QSO number, time and location. On c.w. YLs call "CQ OM," OMs call "CQ YL." and exchange QSO number, time and location. SCORING: Count one point for each contact. Multiplier shall be each state, territory, country or VE province, but the multi plier shall count only once regardless of the bands operated. A contestant may operate any bands but must submit separate scores for 'phone or c.w. There will be prizes for both the YLs and OMs. so join the fun. To be eligible for prizes the YLs must be a member of YLRL, but all licensed OMs are eligible. Mail logs not later than February 5, 1950, to Anabel M. Gifford, W3NNS, 26 Waverly Ave., Morton, Penna.
DX CENTURY CLUB AWARDS
WIFE... . .226 W6VFR.. ..223 G2PL.... ..216 W6EBG.. ..215
HONOR ROLL
W3BES... ..214 W2BXA.. . .213 W8HGW.. ..211
W3GAU.. ..209 W4BPD... ..206 W0YXO.. ..206 W8MEK.. . .206
RADIOTELEPHONE
W1FH,.. ..183 W1JCX.... .158 W8HGW.....155 W6DI.... ..170 W4CYU... .157 G2PL......... .155 XE1AC... ..168 VQ4ERIU, ..157 W1NW0.....152
W2BXA... .158
From October 15 to November 15, 1949, DXCC certifi cates and endorsements based on postwar contacts with 100-or-more countries have been issued to the amateur« listed below.
NEW MEMBERS
G5RV..........147 LU3DH.....144 G3YF.... ..114 PA0VB...,...112 KH6PY,. ..111 W4LIM.. ..111 W1CJK.. ..108 W6LGD.. ..108 G3QD.,., ..106 W6BZE.. ..105 W6BUD.. ..105 W2WPJ.. ..104
W6LV........ .104 W3IBT.... .104 W6DYP... .104 SM6HÜ.... .102 ZS6LW.... .102 VE1HG,... .102 VK5MF.... .101 KZ5IP........ ..101 W6KYT... .101 W9BRD.....101 W6NTR,....101 KZ5CP......101
W2K0M... .101 W8FJX... .101 FE8AB.... .101 W5KUJ.... .100 W1PEG... ..100 G3ACC... ..100 W5GZ.... ..100 W8LYP... ..100 W6ITH... ..100 W8RVU.. ..100 HAMU... ..100
RADIOTELEPHONE
LÜ3DH-. ..119 G5RV.... ..111 W4LIM.. .. 108 VP9G.... ..103
W3MAC.. ..100 W2IUV... ..100 HAMU... ..100
W4MKB.. . .100 W8FJX .. ..100 W6ITH... ..100 W4GLR... ..100
ENDORSEMENTS
W6SN.... ..203 W1TW... ..201 WSNBK . ..194 W2D8.... ..190 ZL1HY... ..190 WITCH.. ..183 W9RBI... ..182 W6DI.... ..181 W2NSZ... ..181 VE3QD... ..180 W2CYS.. .. 180 W6DZZ.. . .176 ZL2GX... , .171 W4PN... ..170 W6UCX. ..170 W2HMJ.. . .164 0K1LM.. .. 163 W6GFE.. _ 163
W2PUD.. ..161 W2AG0... ..161 W3DKT., ..160 G8KP.... ..160 W8WZ.... ..160 W9LNM,. ..154 W0PNQ,.. ..152 wacuQ... ..152 HB9DO... ..150 W9CIA... ..150 W6IBD... ..150 W8UAS.. ..150 OK1FF... ..148 W5BGP... ..146 W2EMW.. ..141 W2TXB.. . .141 W2WZ.... ..141 W9FKC... ..140
W1JLT... ..131 W2RGV.. ..131 W5JC........ ..131 G6RC.... ..131 W2CSO... ..130 W4DHZ.. . .130 OK1SV... ..130 W1BLF... ..129 W6EYR.. ..121 G5FA........ ..120 W5LGS... ..120 W2GTP... ..120 W6WWQ.. ..114 W2LTP... ..112 W6BIL... . .110 W6T8.... ..110 W8ERA... ..110 ZS1M........ ..110
]ELADIOTELEPHONE
W5BGP.....141 ZL1HY......132 W7MBX....132
W4GMA.. ..121 VV6TT.... ..121 W4ESP... .. 121
W2RGV.. . .113 W4MRA. ...112 CN8BA.. ...110
64
QST for
Since the service rendered by amateurs during emer gencies is voluntary and without compensation, agencies served are usually enthusiastic in praise but reticent about offering any criticism. This is natural enough, since any other attitude might be something like "looking a gift horse in the m**outh. However desirable this attitude might be, it has the possible danger of giving AEC groups the feeling that there is nothing to be desired in their set-up; whereas, in informal talks, it may come out that in one way or an other the service could be improved upon.
One of the criticisms which have come out of such in formal talks is duphcation of messages and lack of au thentication of reports and messages during emergencies. Emergency communication is often conducted under conditions of extreme chaos and confusion, and authentica tion is not always possible. An amateur mobile station will report from a disaster area that such-and-such a condition exists; since there is no civic official present, the report is often informal and a matter of the operator's opinion. Some times the operator's judgment is good, sometimes faulty -- the officials outside the disaster area have no way of know ing. But if the information were signed by a known Red Cross or other civic official, there would be no hesitation about acting, no time-wasting attempts to find out from someone in authority what the real facts are.
What we are getting at is that wherever possible messages coming from within the disaster area asking for assistance should be signed by someone in authority. Such messages should be complete as to form and a copy kept at the origi nating station; and such messages should be sent to only one station on the outside. Where a "command" circuit is available and officials can converse with each other di rectly, the officials should be present and should do the talking, if this is possible; otherwise, record messages with authentic signatures should be handled. In emergencies, our primary job is to supply communications facilities. The contents of the communications themselves should come from someone else.
The possibility of duplication should be avoided if possi ble. Amateurs who hear an emergency message being sent should make a note of the contents but should not deliver the message unless it is being sent to them. Then, in the event the station it is being sent to is unable to receive it, it will be possible to receipt for it and offer to make delivery; but such delivery should not be effected without acknowl edgment from the sending station. In the event circum stances appear to make it desirable to deliver the message without acknowledgment, it should be clearly stated^in doing so that it was not sent to you and duplication from another source is probable. In general, this is a waste of somebody's valuable time and should be only a last resort measure.
It is incontestable that the important thing is to get the information through; also, that circumstances alter
cases, especially in emergencies, and no specific rules of conduct or procedure are possible. An operator operating a walkie-talkie in a snow storm cannot "file a copy" of a message he originates; neither can a transmitting station without a receiver transmit a call for help, specific or gen eral, to a single station and hear the acknowledgment of receipt. We have to do what we can with the facilities we have, while in between emergencies striving for better faculties and more efficient operation of them. All we can say, since we have to be general, is that lack of authentica tion and duplication of messages are practices to be avoided -- if possible.
From Splatter, the bulletin of the Minneapolis Radio Club, we glean that on Monday, October 10th, the club was contacted by the Minneapolis Morning Tribune with a re quest for windstorm damage from Rochester and northern Minnesota where normal communications facilities had failed. Quickly several available members were alerted and reports were soon flowing into the city desk. Due credit was received in a fine article in the Tuesday morning Tribune.
Napoleon, N. D., was cut off by a sleet storm last October 20th. An unidentified amateur in that town succeeded in contacting K9FAA, the amateur station at Mitchell Field, Müwaukee, whüe W9VSO was operating, stating that a party in Napoleon was expecting some urgent telegrams. W9VSO called W90NY, the Western Union wire chief in MUwaukee, who traced the sought-after messages to Minne apolis, obtained them, gave them to K9FAA who relayed them by radio to the North Dakota amateur. The total time consumed in the transaction was about a half hour.
At the Indianapolis Fair last September, amateurs of the Indianapolis emergency group were instrumental in provid ing communication between the field stations and the Emergency Hospital set up at the fair grounds. Four set-ups were used, one at each of three field stations and one in the hospital, using 2-meter equipment owned by members of the group. The communications jobs consisted of calling ambu lances, arranging relief shifts for the Red Cross workers, ordering supplies as needed and handling miscellaneous re ports between the stations. Thirty-three amateurs stood 72 watches at the stations during the week that the Fair was in progress. The Red Cross was so pleased that they are con sidering a closer tie-in with the group for communications during emergencies.
The AEC group of Metropolitan Cincinnati has several times been called upon to furnish communications in direct ing parades, and they welcome it as an activity which will help to keep up interest. In November, they turned out to help with the annual Christmas parade, in which mobile stations furnished by W4KFV, W8YGH, W8DEU and W4NRA supplied communication between points along the parade. Mobiles were placed with Red Cross first-aid sta tions at the origin and ending point of the parade, and two additional mobiles patrolled and supplied communication from and to in-between points. Officials of parades of con siderable length are very often in need of mobile communi cation facilities. It is a means of combining practice with service which might well be adopted by other groups.
Norwalk, Conn., was hit by a triple "disaster" last
October 16th -- a hurricane and a railroad wreck, fol lowed by a Hood. All this was part of the annual Simu lated Emergency Test, in which the Norwalk AEC turned out in full force to man a station at the Red Cross chapter house and put several mobiles in the field. The cut shows part of the Red Cross station, W1SGZ, withjWlQBO and W1PBH at the^controls. "Operation Norwalk"twas conducted under the direction of W1CTI, Norwalk EC, and W1DBM, chairman of the Red Cross disaster communications committee
January 1950
MEET THE SCMs
Lloyd E. Hopkins, W9EVJ, has been an active amateur since obtaining his first license in 1932.
In addition to his office as SCM of Illinois, Lloyd holds ORS» RM and Trunk Line Station appointments and is a member of the A-l Operators Club. He holds a Public Service certificate for communications work during the Illinois-Iowa Blizzard of January, 1948. W9EVJ has par
ticipated in SS and DX Contests and has made the BPL many times. A member of the Elgin Am ateur Radio Society, Lloyd is a past-president of that organization.
The layout at W9EVJ. which is located in a sec ond-floor room, includes 24 ECO-46 buffer-pair 46s final, and 6L6-807 on 28-Mc. 'phone, in addition to a BU-348N receiver. Also on hand is a 50-Mc. 'phone portable. Antennas in regular use are a half-wave center-fed on 3.5 and 7 Me., and a dipole on 28 Mc. W9EVJ works mostly on 3.5 and 7 Me. Sports which Lloyd enjoys as a participant or spectator are baseball, handball, fishing, and football. His occupation is printing pressman for the Brethren Publishing House.
TRAFFIC TOPICS
In view of the fact that many amateurs are still reporting their traffic totals according to the old system, we think we should again point out that a new system for counting traffic was adopted on September 1, 1949, and traffic is now counted as originated, received, relayed and delivered instead of the former categories. Details in September, 1949, QST.
W0GMZ comes forth with the following: "Last night a message was relayed to me for a party in a near-by Nebraska town; I had received the message two nights before and had already made delivery! Several days ago a Colorado amateur sent me four messages for Chicago, which w'ere promptly relayed; to my amazement, two days later those same four messages were sent to me by a W4 who said he had just received them from a W2!"
It is hard to tell what happens in these cases, but we all know that it should not happen. Observance of two simple niles by all concerned would do away with this useless and face-losing duplication: (1) send each message only once to one station; (2) do not undertake to relay or deliver a mes sage unless it is sent to you.
Slow-speed nets are blossoming all over the place, many of them conducted by ARRL section officials in conjunction with regular section traffic activities. Some examples of these: Colorado, Connecticut, Georgia, Michigan, New York State (W.N.Y. and E.N.Y.), Oregon, Quebec, Kansas, Washington and Wisconsin. Most sections which do not operate slow-speed nets welcome slow-speed operators into their regular net and give them every consideration. ARRL's Trunk Line S was organized specifically for the slow-speed operator, and has many slow-speed connections along its route.
There is no longer any reason (if there ever was any) for operators who cannot maintain a fast code speed to refrain from handling traffic. W2PH0, in his fine "NYSS News," expresses a sentiment we like in replying to a prospective member of the net who says he cannot maintain a high speed, is a rank beginner, and cannot attend the net every night: "NYSS came on the air for the specific purpose of training beginners in traffic handling by having them actually do it under conditions suited to their operating ability. You are as welcome as the flowers in springtime, fella, and if you get paralysis of the wrist and suddenly for get that didah means A we'll cheerfully wait until you come out of it. As for attendance, there is no definite re quirement; check in when you can, and as often as possible. "
SUPPLEMENT TO NET DIRECTORY
This listing is to be added to the directory as published in November, 1949, QST, page 63. Another supplement will be published in March QST. Requests for changes or addi tions to be included in that listing should be sent to ARRL no later than January 15th. A complete mimeographed di rectory of nets registered up to November 15th is available upon request from the ARRL Communications Depart ment; in addition to the alphabetical listing by name, this directory contains tabulations of nets according to fre quency and alphabetically by states.
Name of Net
Freq. Time
Days
Albert Phone Net..................... 3765 2115 MST Mon., Wed., Fri.
Badger Emergency Net......... 3959 1200 CST Mon.-Sat.
British Columbia Net *............ 3655 1900 PST Daily
2200 PST
Buzzards Roost Net............... 3930 1730 EST Mon.-Fri.
Central Amateur Radio Club
Net....................................... 7225 1900 CST Daily
Colorado Slow Speed Net.... 3560 1730 MST Mon.-Fri.
Delta 75 Phone Net............... 3905 0730 CST Sun.
Eastern Penna. Net *.......... .. 3610 1830 EST Mon.-Fri.
Eleventh Regional Net (NTS) 3540 1945 MST Mom-Fri.
FARM Net............................ 3935 2030 MST Mon.-Fri.
Fifth Regional Net (NTS)... 3645 1945 CST Mom-Fri.
2115 CST
First Regional Net (NTS) ,, 3610 1945 EST Mon.-Fri.
2115 EST
Fourth Regional Net (NTS) * 3617 1945 EST Mon.-Fri.
2115 EST
Gem Net (Idaho)................... 3743 2100 MST Mon., Wed., Fri.
Georgia-South Carolina Net * 3525 1930 EST Mon.-Fri.
2130 EST
Interstate Utility Net
(Colo.)*............................ 3540 1900 MST Mom-Fri.
Jersey Net................. ............. 3630 2100 EST Mon-Fri.
Kentucky Net *...................... 3600 0900 CST Sun.
1900 EST Mon-Sat.
Lake Erie Network.......... . 29,000 2130 EST Sun.
Magnolia Net (Miss.) ...... 3870 2100 CST Wed.
Manitoba Phone Net............. 3805 1900 CST Daily
Minnesota Phono Net.......... 3960 1.205 CST Mom-Sat.
1800 CST Mom-Sat.
0900 CST Sun.
Mission Trail Net................... 3804 1930 PST Daily
3854 1900 PST Daily
Missouri Emergency Net *.. 3905 1930 CST Mon., Wed., Fri.
Missouri Traffic Net.............. 3755 1900 CST Mom-Fri.
Montana State Net............... 3520 2030 MST Sun., Tue., Thu.
Mountain Area Net (NTS) * 7190 2030 MST Mon.-Fri.
Nebraska 75 Meter Net........ 3983 1230 CST Mom-Sat.
2000 CST Tue., Thu.
Nevada State Net.................. 3660 1915 PST Mon.-Fri.
New Hampshire Traffic Net.. 3685 1900 EST Mom-Fri.
New Jersey 75 Meter Phone
Net....................................... 3900 0900 EST Sun.
New Mexico CW Net............ 3705 1900 MST Mon.-Fri.
New Mexico Emergency Net 7266 0900 MST Sec. Sun. ea. mo.
New Mexico 75 Meter Phone
Net................. ..
3885 0730 MST Sun.
NYC-LI Emergency Net.... 3600 2000 EST Fri.
NYC-LI Traffic Net *........... 3710 1900 EST Mom-Fri.
2200 EST
Ninth Regional Net (NTS).. 3565 1945 CST Mon.-Fri.
2115 CST
North Carolina Net........ 3605 1900 EST Mon.-Fri.
2200 EST
Northern Emergency Net.,.. 3700 1145 EST Sun.
Ohio Buckeye Net.................. 3730 1900 EST Mon.-Fri.
Ohio Emergency Corps.......... 3725 1930 EST Mon.
Oklahoma Phone Emergency
Net....................................... 3860 0800 CST Sun.
Oklahoma Traffic Net
3682.5 1900 CST Mom-Sat.
Ontario 40 Meter Net...... 7267 1930 EST Daily
Oregon Slow Speed Net........ 3585 1900 PST Mon.-Fri.
2000 PST
2100 PST
Pacific Area Net (NTS)..... 3670 2030 PST Mon.-Fri.
7207.5
66
QST for
Pelican Net............................. 3870 0645 CST Wed.
Pineapple Net
......... 3725 2000 HST Mon., Wed., Fri.
Pioneer Net.................... 3725 1900 PST Mon.-Fri.
Polecat Net......................
3665 1130 EST Sun.
Quebec Emergency Net........ 3570 1030 EST Sun.
Quebec Net *..........
3570 1900 EST Mon.-Fri.
2200 EST
Quebec Slow Speed Net........ 3570 2000 EST Mon.-Fri.
Kansas Net............. .. 3610 1845 CST Mon., Wed., Fri.
Kansas Slow Speed Net...., 3610 1845 CST Tue., Thu
Rebel Net.............................. 3635 1900 CST Mon.-Fri.
Rochester Emergency Net... 3860 2000 EST Mon.
3740
7250
144,130
Sacramento Valley Emer-
gency Net................ ..
146,500 2030 PST Thu.
Sacramento Valley Section
Traffic Net..................... 29,400 1900 PST Daily
San Diego Emergency Net... 29,500 2000 PST Tue.
Sea Gull Net........................... 3961 1700 EST Mon.4Yi.
Second Regional Net (NTS). 3575 1945 EST Mon.-Fri.
2115 EST
Seventh Regional Net (NTS) 3575 1945 PST Mon.-Fri.
2115 PST
Sixth Regional Net (NTS)... 3735 1945 PST Mon.-Fri.
2115 PST
South Carolina Amateur Net 3940 1930 EST Mon.-Fri.
South Carolina Phone Net... 3935 1930 EST Wed.
1000 EST Sun.
1530 EST Sun.
Southern Border Net
3550 2030 PST Mon.-Fri.
Southern New Jersey N*,..et
3700 1900 EST Mon., Wed., Fri.
South Texas Emergency Net
(CW).......................... -........ 3840 2030 CST Mon.
(Phone)
3860 1830 CST Mon.
(Zone 1)
3860 0700 CST Sat.
(Zone 2)
3860 1830 CST Thu.
(Zone 3)
3860 1830 CST Wed.
(Zone 4)
3860 0700 CST Mon.
Suwanee Net (W. Fla)......... 3595 1930 CST Mon.-Fri.
Tar Heel Phone Net (N. C.) 3865 1930 EST Mom-Fri.
Tenth Regional Net (NTS) .. 3735 1945 CST Mom-Fri.
2115 CST
Third Regional Net (NTS).. 3590 1945 CST Mom-Fri.
2115 CST
Transcontinental Independ
ent Net............................. 7285
2030 PST Daily
Transcontinental 'Phone Net 3970 Various Daily
Trunk Line C............. 3790 2100 EST Mon.-Fri.
3775
Trunk Line J........................ 3565 1945 CST Mon.-Fri.
Twelfth Regional Net (NTS). 3540 1945 MST Mon.-Fri.
Union County AEC Net
(N.J.).................................. 144,700 2100 EST Tue.
Valley Net (Calif.)................. 29,280 2000 PST Mon,, Wed., Fri.
3775 1915 PST Mom-Fri.
2200 PST
Vermont Net....................... 3740 1900 EST Mon.-Fri.
Vermont Phone Net............... 3860 0930 EST Sun.
1800 EST Tue., Thu.
Virginia Net *. ...................... 3680 1900 EST Mom-Fri.
2200 EST
Wash. Amateur Radio Traffic
System.................. ............. 3970 1830 PST Daily
Wash. CW Net (Slow Speed) * 3685 1830 PST Mon.-Fri.
West Virginia Phone Net.... 3890 1900 EST Mom-Fri.
Western Mass. Net
. 3725 1900 EST Mon.-Fn.
2200 EST
Western Mass. 10 Meter
'Phone Net.......................... 29,250 2100 EST Thu:
Western Penna. Traffic Net.. 3750 mo EST Mom-Fri.
Wisconsin Net......................... 3775 1900 EST Mon.-Fri.
2200 EST
(Slow Speed)
1830 EST
York Amateur Emergency
Corps......... .............. .
144,138 2200 EST 2nd & 4th Mon.
* Change from previous listing.
Here is another of the West Coast's top traffic per formers: W6CE. With this unpretentious set-up, Tim
has racked up traffic totals well in excess of BPL require ments for eleven successive months and is a cinch to be 100 per cent BPL for 1949. He is ORS and RM, man ager of the Sixth Regional Net of NTS, holds 35-w.p.m.
oxide proficiency certificate and is a member of the A-l Operator's Club. The rig is home built, a 6AG7-6AG74D32 combination running 150 watts input.
BRASS POUNDERS LEAGUE
Winners of BPL Certificates for October traffic:
Call
Oris. Reed. Rei. Del. Total
W6CE....... . 60 1141 1083
16 2300
W7CZY........... 72
927 867
30 1896
W2TYU........ . . 24
825 741
61 1651
W4PL.............
6
778 737
24 1545
W1AW............ . 24
628 256 362 1270
W8X0H.......... . 14
578 458 100 1150
EG6DI.............. 178
364 206 154
902
W5GZU..........
3
381 312
24
720
W7CKT..........
0
351
349
o
702
W1NJM.......... ¿6
328
79 245
678
W5DRW *..**
4
330 325
0
659
W9ESJ............ , 36
303 231
72
642
W9EBX..........
4
312 312
10
638
W2JYR ..... . 87
315
212
0
614
W1QJM
10
296 271
36
613
W4LNN............ 17
312 264
15
Ô08
W2PBE............ , 2»
286 235
27
577
W2OBU ......... . 472
27
10
13
522
W2RUF........ 38
36 334 108
516
W5<RJ........... . 213
169
124
10
516
W2CLL........... . 34
231 231
16
512
W5BXN-........ . 507
2
0
2
511
The following made the BPL for deliveries:
WIBDI 205 W1RWS 155 W6YLZ 104 W5MN 88
W1DAV 86 W5DRW 73
W6DDE 69 W5LSN 66 W7F1X 65 W7ZU 61 W3GUL 59 W6FDR 57
W8SCW 53 W2TYC 52 W1QIS 51 W1FTX 50
A message total of 500 or more or 50 or more de
liveries will put you in line for a place in the BPL.
The Brass Pounders League is open to all operators who qualify for this monthly listing.
* August Traffic * * September Traffic
*** April Traffic
January 1950
67
FREQUENCY-MEASURING TEST,
FEBRUARY 6TH
All amateurs are invited to try their hand at frequency measuring. WIAW will transmit signals for the purpose of
frequency measurement starting at 9:30 p.m. EST (6:30 p.m. PST), Monday, February 6th. The signals will consist
of dashes interspersed with station identification. These will follow a general message sent to help listeners to locate the signals before the measurement transmission starts. The ap proximate frequencies used will be 3509, 7267 and 14,179 kc. About 4X minutes will be allowed for measuring each, frequency, with long dashes for measurement starting about
9:36 p.m. It is suggested that frequencies be measured in
the order listed. Transmissions will be found within 5 or 10 kc. of the suggested frequencies.
At 12:30 a.m. EST, February 7th (9:30 p.m. PST, Febru
ary 6th), WIAW will transmit a second series of signals for the Frequency-Measuring Test. Approximate frequencies used will be 3589, 7056 and 14,101 kc.
Individual reports on. results will be sent to all amateurs who take part and submit results. Copies of this report are sent SCMs also, so eligibility for OO appointments is known. When the average accuracy reported shows error of less than 71.43 parts per million, or falls between limits of 71.43 and 357.15 parts per million, the participants will become eligible for appointment by SCMs as Class I or Class II official observers, respectively!
This ARRL Frequency-Measuring Test will be used to aid qualification of ARRL members as Class I and Class II observers. Present observers not demonstrating the requisite average accuracy will be reclassified appropriately until they demonstrate the above-stated minimum required accuracy for these classes of appointment. Class I and Class II OOs must participate in at least two Frequency-Measuring Tests each year to hold such appointments. SCMs (see address, page 6) are open for initial applications for Class HI and IV observer posts, good receiving equipment for 'phone and c.w. bands being the main requirement. AU observers must make use of the cooperative notice (mail) forms provided by ARRL, reporting activity monthly through SCMs, to warrant continued holding of official observer appointment!
QST To Report Results
Any amateur may submit frequency measurements on one or all frequencies listed above. No entry consisting of a single measurement will be considered eligible for the QST listing of the top results in this FMT; at least two readings and preferably more should be submitted to warrant QST mention. Order of listing will be based on the over-all average accuracy, as compared with readings submitted by an inde pendent professional frequency-measuring organization.
A.R.RX. ACTIVITIES CALENDAR
Jon. 7th: CP Qualifying Run -- W6OWP Jan. 7th-8th, 14th-15th: 10-Meter WAS Party Jan. 19th: CP Qualifying Run -- WIAW, W0TQD Jan. 21sf--22nd; V.H.F. Sweepstakes Jan. 29th-30th: CD QSO Party Feb. 3rd: CP Qualifying Run -- W6OWP Feb. 10th-13th: DX Competition (c.w.) Feb. 13th: CP Qualifying Run -- WIAW, W0TQD Feb. 17fh-20th: DX Competition ('phone) Mar. Sth: CP Qualifying Run -- W6OWP Mar. 10th--13th: DX Competition (c.w.) Mar. 17th--20th: DX Competition ('phone) Mar. 17th: CP Qualifying Run April 1st: CP Qualifying Run -- W6OWP April 19th: CP Qualifying Run --WIAW,
W0TQD April 22nd--23rd: CD QSO Party May Sth: CP Qualifying Run -- W6OWP May 16th: CP Qualifying Run -- WIAW,
W0TQD June 3rd: V.H.F. Contest June 24th-25th: ARRL Field Day
WIAW OPERATING SCHEDULE
(All Times Given Are Eastern Standard Time)
Operating-Visiting Hours: Monday through Friday: 1130-0600 (following day) Saturday: 1900-0230 (Sunday) Sunday; 1600-2200
General Operation: Refer to page 64, September, 1949, QST, for a chart showing WIAW general operation. This schedule is still in effect and is not reproduced herewith for space considerations. Mimeographed complete master schedules of all WIAW operation in EST, CST, MST, PST or GCT are available upon request.
On Saturdays and Sundays during which official ARRL activities are being conducted, WIAW will forego general contact schedules in favor of participation in the activity concerned.
Official ARRL Bulletin Schedule: Bulletins containing latest information on matters of general amateur interest are transmitted on regular schedules:
Frequencies: C.W. -- J.887, 3555, 7215, 14,100, 28,060, 52,000, 146,000 kc. 'Phone -- 1887, 3950, 14,280, 29,000, 52,000, 146,000 kc.
Times: Sunday through Friday, 2000 by c.w., 2100 by 'phone. Monday through Saturday, 2330 by 'phone, 2400 by c.w.
Code-Proficiency Program: Practice transmissions are made on the above-listed c.w. frequencies, starting at 2130, Monday through Friday. Speeds are 9, 12, 18, 25 and 35 w.p.m. on Monday, Wednesday and Friday, and 15, 20, 25, 30 and 35 w.p.m. on Tuesday and Thursday. Approximately ten minutes of practice is given at each speed. Next certifi cate qualifying run from WIAW and W0TQD is scheduled for Jan. 19th; from W60WP, Jan. 7th.
The station staff: T. F. McMullen, W1QVF, "fm" R. N. Eidel, W1RUP, "re" R. E. Morrison, W1RXL, "Ir"
CODE-PROFICIENCY PROGRAM
Twice each month special transmissions are made to enable you to"qualify for the ARRL Code Proficiency Cer tificate. The next qualifying run from W1AW/W0TQD will be made on January 19th at 2130 EST. Identical texts will be sent simultaneously by automatic transmitters. Fre quencies of transmission from WIAW will be 1887, 3555, 7215, 14,100, 28,060, 52,000 and 146,000 kc. W0TQD will transmit on 3534 kc. The next qualifying run from W60WP only will be transmitted on January 7th at 2100 PST on 3590 and 7248 kc. For additional qualifying-run dates, see the ARRL Activities Calendar elsewhere in these pages. & Any person may apply; neither ARRL membership nor an amateur license is required. Send copies^of all qualifying runs to ARRLJor grading, stating the call of the station you copied. If you qualify at one of the.five speeds transmitted, 15 through 35 w.p.m., you will receive a certificate. If your initial qualification's for a speed, below 35jv.p.m., you may try later for endorsement stickers.
Code-practice transmissions are made from WIAW each evening, Monday through Friday, at 2130 EST, References to texts used on several of the transmissions are given below. These make it possible to check your copy.
Date
Subject of Practice Text from November QST
Jan. 4th: The "Setectojeci," p. 11 Jan. 6th: The "Selectoject," p. 14
Jan. 7th: Qualifying Run, 2100 PST, from W60WP only Jan. 10th: Break-In with One Antenna, p. 18 Jan. 12th: Harmonic Reduction . . p. 21 Jan. 16th: Harmonic Reduction . . ., p. 26 Jan. 18th: The Regenerative Wavemeter, p. 29 Jan. 19th: Qualifying Run, 2130 EST, W1AW/W0TQD Jan. 24th: The " City Slicker" Array for 144 Me., p. 32 Jan. 27th: The Story of FP8AAi p. 35 Jan. 30th: A 75-^and^O-Meter Single-Sideband Exciter, p. 40
68
Buy Christmas Seals ^^^.^^^(Number one hundred eighty-nine of a series}
Merry Christmas
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C. L. Gagnebin..
.W1ATD
Herman Bradley.
.W1BAQ
Lawrence Amann
. .W1BG
James Ciarlone..
W1BHW
Calvin Hadlock..
W1CTW
Harvey Poore...
W1DKM
Seth Card.............
.W1DRO
Albert Porter.... , . .W1ESI
J. Francis Bartlett
.. .W1EU
William Osborne
.W1EXR
George R. Ringland.... W1EYZ
Don Hinds......................... W1FRZ
Robert Murray................. W1FSN
Dave Smith..................... W1HOH
John Baxter..................... W1HRK
Vincent Messina........... W1HRW
Jack Ivers..........................W1HSV
Joe Rossi......................... W1HXY
Edmund Harrington........ W1JEL
Alfred Zerega..................W1JMK Robert Williams.............W ÎJOX
Frank Lopez..................... W1KPB
William Martin.............. W1K.UB
Richard Gentry................ W1LEN
John Stanley....................... W1LFF
Léo Green......................... W1LML
Francis Waden................ W1LNV
Clyde Schryver
Richard Thurston
.W1MFZ
Victor Penney...
.W1MTS
Donald Poulin... .W1MXC
Dexter Atkinson.
W1MYH
Martin Oxman... · W1NYU
Ralph Hawkins..
.W1OEX
John Prusak.........
.W1OPT
Austin Banks.... .W1ORK
William McNamara.. .W1OTK
William Bartell...
..W1PIJ
Charles Coyle.... .W1PMÈ
Harry Paul...........
.W1PMS
Richard Brayley. .
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Hyman Kana. . . .
..W1PSJ
George Servente. . W1PWG
Raymond Jordan.
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Harry Mayo........... .W1QPQ
S. W. Bateman...
. .W1RX
Clark Rodimon..
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William S. Doyle.
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Edward Braddock .W2BAY
Arthur H. Lynch.
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Raymond Lewis..
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Ralph Hemeon... . .W6CYJ
Herb Becker.........
. .W6QD
W. Clif McLoud.
.W0AZT
............ W0RPE
A It is a privilege to reproduce the 1949 Christinas Sea] of the National Tuberculosis Society as a token of our contribution
ADVERTISEMENT
69
· All operating amateurs are invited Lo report to the SCM on the first of each
month, covering station activities for the
preceding month. Radio Club news is also desired by SCMs for inclusion in
these columns. The addresses of all
SCMs will be found on page 6.
ATLANTIC DIVISION
PASTERN PENNSYLVANIA -- SCM, Jerry Mathis,
1^2 W3BES -- QV is on 3.5 and 3.85 Me. working traffic. PDJ is on 28-Mc. 'phone and 7-Mc. c.w. with a pair of 807s. NNV points out that the local lads are getting into the had habit of omitting the " W " from their calls. QLW was on the air from the Wayne County Industrial and Hobby Show
Oct. 19th to 22nd. Seventy-five messages were originated by MLW, QQC, CFD, QXV, KBV, and QLW. KBV had a display of old tubes and radio gear and a BC-654A. The ARRL supplied a display also. GDI's rig blew up during the CD Party. SQ is having a good time on 14-Mc. 'phone using his Spanish on our South-of-the-Border neighbors. SQ also served as contact man for the Ecuadorian Goodwill Flight and was thanked by the Ambassador for his fine work. GHM now has a ten-twenty beam and separate doublets for 3.5 and 7 Me. LTU has worked 181 countries on `phone. CPV has new 310B Collins. BXE/FP8AA is being snowed under with inquiries concerning his trip to St. Pierre. What has happened to all the reports from radio club secretaries? Not one has been received by the SCM in several months. Let us hear from the various clubs about their activities and programs. Traffic: W3CUL 424, PMG 113, QLW 75, EAN 52, ELI 20, OML 20, AXA 17, WTS 16, PDJ 14, GDI 4. EU 2.
MARYLAND-DELAWARE-DISTRICT OF COLUM BIA -- SCM, Eppa W. Darne, W3BWT -- The Chesa peake Amateur Radio Club had a ` ` Symposium on Receiver Circuits" at its first October meeting. Members were invited to submit their problems to a Board consisting of NVL, AFM, and LFF as moderator. LXK described and demon strated a simplified f.m. exciter at the second. October meeting. A Hidden Transmitter Hunt was held Oct. 30th with prizes for the first three winners. The club soon will begin publication of its new monthly journal. Chesapeake Panorama. The Washington Radio Club at its first October meeting featured a talk by 4OLL, his subject being "Practi cal Use of S.S.S.C. on the Amateur Bands." Articles of In corporation were presented at the meeting by Fred Albert son, FMC, for approval of the membership. The second October meeting was a Movie Night. Members of the Potomac-Rappahannock Valley Net had a meeting on Oct. 16th at Front Royal, Va., which included luncheon, a busi ness session, gabfest, and a trip through the New Riverton Power Plant. The net resumed regular formal drills on Nov. 6th at 9:00 a.m. Frequency used is 3935 kc. and drills are held on the first and third Sundays of each month, coin cident with the 144-Mc. group. The Rock Creek Amateur Radio Assn, had a representative of the FCC as guest speaker at its Oct. 14th meeting. An auction of spare gear was held during the second October meeting. During the month the Club had a booth at a local exhibit. Ham ap
paratus was demonstrated and 200 messages were handled for the public in attendance. The Baltimore Amateur Radio Communications Society has a new entertainment commit tee, headed by PSP, and a program committee with JCL as chairman. Present club plans include further develop ment of Control Station at Red Cross Headquarters, mobile drills, an aggressive membership campaign, and continued publication of the Club's paper, the Modulator. Field Day committee chairman is HJY, and membership committee chairman is LUE. EQK was visited by 2PFL recently. EOV is on 28 Me. and has moved to his new QTH. OMR has 300-watt rig on 3.5, 7, and 14 Me., c.w. and 'phone. PAW is a new Baltimore station. GBB is converting a BC-457 to mobile VFO. IBX entertained 0MNH over a recent week end. JCU gets out well with his revamped rig and a threeelement beam on 28 Mo. QL has a new rig on the air. LFF and FLG are collaborating on a new 28-Mc. mobile receiver. PRJ is on 7 and 144 Me., on the latter frequency has a 522 transmitter and a Silver 800 receiver, and uses a five-element rotary beam. PLC has a new gamma match beam. PFF is on regularly despite night school. UF is very active handling traffic on 7 Me. GRF ir active on 14 Me. and made a swell
70
score in recent CD Party. NST has new QTH across the street from NNX. JZY has moved to Smithsburg, Md. NNX is on 27- and 28-Mc. mobile. LFG is building a crystal-controlled transmitter, for 420 Me. EYX visited Hyde Park, N. Y., and worked mobile 28 Me. while on the
trip. The Capitol Suburban Radio Club gives public thanks to CG for all his fine work for the Club and wishes him luck at the new QTH, Long Beach, Calif. Traffic: W3UF 445, ECP 171, LFG 77, AKB 35, JHW 24, NNX 20, FWP 10, BWT 8, QL 8.
SOUTHERN NEW JERSEY--SCM, Dr. Luther M.
Mkitarian, W2ASG--BEI keeps daily schedules with G6BY and G3HZ. Zl has lost his antenna. BAY keeps very busy with twins. YAD has obtained his WAC. WJE is new ham in Ocean City. VUM, YAD, BLR, WJE. and UKS are active on 160 meters. IMA is doing FB EC work with local Fire Department. PFT and ORS keep daily schedule with K2USA. Secretaries of clubs in this section, please contact your SCM for visitation arrangements and send in all the news. Traffic: W20RS 20, ASG 5, BEI 4, Zl 2.
WESTERN NEW YORK---SCM, Harding A. Clark, W2PGT -- SEC: SJV. RM: RUF. Again the hams in this
section proved that they are ready for an emergency by the very excellent showing they made in the recent Simulated Emergency Test. However, we still need AEC members in several localities. Write SJV today for an application. WZQ says motorcycle school and the YLs are causing him to be inactive on the air. FE is rebuilding his shack. The Ladies Auxiliary of RARA held a meeting with 30 attending and elected the XYLs of TEX, UTH, and NES officers in the usual order; The NYS Net collected results on senatorial election and forwarded them to party headquarters in New York City. QNA is back on 144 and 50 Me. New officers of the Niagara Falls Radio Club are RGO, pres.: OVP, vicepres.; and RCK, secy.-treas. ZD W has new 32-ft. steel tower for his beam. ZZS is having good success with n.f.m. on 28 Me. SZL has been busy de-TVTing new kw. rig. QY works early morning DX on 7 Me. There are 24 stations using mobile in the Rochester area. 0ZJY is a newcomer to Roch ester. BCL, UXP, ZHB, UAD, and NES all use 6J6 pre amplifier on 144 Me. with reception much improved. PGT has moved to 42-acre antenna farm. Please send activity reports to R.F.D. 2, Manlius, or to 814 State Tower Bldg., Syracuse, in the future. RUF is back in the habit of making BPL each month. PWN has been appointed Class I and III OO. Traffic: (Oct.) W2RUF 516, YGW 139, PGT 133, WOE 115, SJV 85. RUT 39, QHH 37. AOR 33. FE 23, YRF 8. (Sept.) W2WZQ 66.
WESTERN PENNSYLVANIA -- SCM, Ernest J. Hlinsky, W3KWL -- Well, gang, you have again shown them all in the recent National Simulated Emergency Test.
In my opinion it was the best showing ever put out in any simulated or real emergency by the Western Pennsylvania gang. Congratulations to all of you for a job well done.
Special recognition goes to MPO, Section Emergency Coordinator;" OMA, Pittsburgh Area EC; MBB, Blair County EC; QN, of Erie County, along with TFX for his fine publicity; QCN, Mercer County EC; and all other ECs who took part. Up Warren way PMY, NQA, LFV, and BOZ can be heard on 28-Mc. mobile. OMK is a proud
papa. RMM has a new summer cottage. In Mercer County the MCRA elected KQA, pres.; CJB, vice-pres.; Bonnie
Massy, secy.; and George Heim, treas. Mr. Heim, com pletely blind, is head of the Blind Association in Mercer County and takes his radio club quite seriously. The Western Pennsylvania traffic net is going full swing. POW and NRE are new ORS appointees. GEG is taking his
traffic nets in stride. Besides being manager of the 3rd Regional Net he reports or runs in five other nets. In Altoona the boys are chewing each other's ears to keep each other from working DX. The ATA of Pittsburgh an nounces that A. L. Budlong, of ARRL, now is an honorary member of that club. The Fort Necessity Open House was a huge success. RUG has deserted c.w. for 'phone. The South Hills Brass Pounders ¿V Modulators 28-Mc. Ground Wave Contest showed lots of activity. The Old Polecat
Net of Pittsburgh is operating again on Sundays at 11:30
a.m. on 3665 kc. LMM makes his first report in many a
year. LOD reports that McKean County had a successful emergency drill. PAB is toying with Clapp VFO. State
College reports the following new members: FWH, LDL,
KCV, NSJ, KGX, and PQJ. MOT's new pole was up one
day when the wind blew it down. BWL is studying Diesel
Engines. NCJ says local QRN keeps him from traffic
schedules. Traffic: (Oct.) W3GEG 281, KWE 183, NUG
81, NRE 20, KSR 18, NCD 17, LIW 16, LMM 13, POW 7,
BWL 6, IYR 6, NCJ 6, LOD 5, PAB 3. (Sept.) W3GEG 35. (Continued on page 72)
71
CENTRAL DIVISION
ILLINOIS -- SCM, Lloyd E. Hopkins. W9EVJ -- Sec1 tion nets: IEN, 3940 kc.: ILN, 3765 kc. SEC: QLZ. PAM: UQT. RMS: SXL, SYZ. Activity hit a new high
this month in all phases of the section program. BON is the first OES appointee in the State. New ORS are CMU and JNC. FRP now is Assistant EC for Kane County. BRX says the local club is looking for 2-kw. motor gen erator. FHV is new on ILN. The Kishwaukee Radio Club's new officers are TWM, pres.; WTF, vice-pres.; ULL, sew?-.; and Mr. Green, treas. HMM has new RME-45 and VHF152. TWM sports a new Collins 75A. OEV still is on the air in spite of getting married. WCD has a Lazy H antenna 80 feet high. DNV set up with new 10-meter beam and TBS-50. SIU is exploring 3.85-Mc. 'phone for the first time. WTF went for higher power on 28 Me. EVJ visited hams in Evanston. Decatur, and Springfield. AND in forms us of the death of JEA, who was assistant fire chief at Freeport. AUU is the father of a baby boy. The Sanga mon Valley Radio Club "Keeper of the Pot" ceremony found KCX turning things over to ISG in hilarious fashion. JMG reports cold weather drove him from the garage to the kitchen for his operating. DUA was active during the
Simulated Emergency Test with almost 20 members par ticipating. NN was kept QRL installing co-ax fittings in new house. GDI found the CD Party lots of fun. FFD found DX such as DL, ZL3, ZS6, ZS5. G2, and G3. PHE had a swell contact with DL4DE for 2 M hours using Collins 3OK. ODT is working 14 and 28 Me. GFF bought a house in the sticks. MFY is out for 7-Mc. mobile WAS. BUD works 28-Mc. c.w. DX on week ends. VES can't find his invisible antenna. RJM seeks DX on 7, 14, and 28 Me. IZ pushes through on 28-Mc. n.f.m. Ex-9KIO now is 3OSP. TO was heard on 'PHONE. DVH sports new high power on 14 Me. AEH busily defended his VK-ZL Test championship. 8YNY and 0UOX visited BRD. JUV is attending Lawrence College in Wisconsin. YTZ is gunning for 7-Mc. DX. JKL left 28 for 7 Me. ZWM is trying 3.5-Mc. c.w. ZEN works DX on 28 Me. over week ends. CDG delivers messages at your door with mobile job. TLC is using low power on 28-Mc. 'phone feeding a mile of wire. QLZ worked DAX, who was passing over in his plane. YNE is back at work after an illness. The Starved Rock Radio Club celebration featured a visit by 1DX, of Headquarters. CXT is now a lieutenant jr. grade. ATA is working such stuff as ZS, G, OA, and VP. TAY is building a new home. YBY is making a
good showing on 144 Mo. IDA reports 127 contacts during the month. CTZ worked a G on 3.5-Mc. c.w. New OO sta tions are EHS and ZPC. New OBS appointees are ACU and KCX. YPS finds time to report into ILN. SYZ is operating each Friday night from IIZ, Chicago Coast Guard station. Nearly half of our counties are now repre sented by an EC. How about the rest of them? Contact QLZ if you can act for the hams in your area. We are shoot ing for 100 per cent coverage in our State. Illinois ECs made a good showing in the Simulated Emergency Test and we thank them. Traffic: (Oct.) W9EBX 638, DUA 348. EVJ 338, CTZ 212, CMC 102. MRQ 68, CBA 67, JMG 29, PEK 25, FRP 24, CMU 23, FFD 19, IFA 18, LIN 17, FKI 16, ZPC 15. BUK 14, SYZ 12, NN 9, GDI 4, FHV 1. (Sept.) W9BRD 27, DUA 10.
INDIANA SCM, W. E. Monigan. W9RE -- GHK now has all-band antenna, and is ORS and an AEC mem ber. GVN bought Signal Shifter kit. GFO has the 160-meter fever. AZU is on 7-Mc. c.w. EHU built a mobile job for his car. HQF increased power to 700 watts. QLW is trying the CD Tests. CM W is at the Valparaiso Technical School. KTX visited EGQ at Gary. To prove you can succeed, IGZ, age 64, received his ham ticket after his sixth at tempt. He now is president of the Northeastern Indiana Radio Club. BKJ has new exciter and VFO and is building separate finals for 3.5 and 14 Me. FYC is going mobile. IFX is building a new ham shack in the backyard. AJ has a BC-610. FSG says the situation is clearing up and he may find time to do some hamming. He has a 40-ft. A frame to hang wire on. PRO, JJX, GPL, and SWH provided emergency communication to Huntertown when a falling aeroplane cut the cable between there and Fort
Wayne. A three-way radio link was provided until the police link was set up. JRR now has all the parts for a TVI-free high-power transmitter using a pair of VT127s in the final. GPL, FXV, FRU, and PRO of Fort Wayne visited the Northeastern Indiana Radio Club and had the pleasure of meeting KX5RM. Get your reports and news in, fellows, so I can work up an interesting report for you. Traffic: W9TT 87, BKJ 61, RE 22, KTX 17,
SNQ 12, QLW 7. WISCONSIN --· SCM, Reno W. Goetsch, W9RQM
.... DJV, OBE, WEN, FCF, LVR, JBF, WJH, LFK, and RQM participated in the Oct. CD Party. FXA has a new HT-18 VFO. The WIN Newsletter, edited by DJV, has been enthusiastically received. Reports on the National Emergency Test were received from the following: Mil waukee, RUF; Madison, UFX; Wausau, VHA; Green Bay, WLZ; Marinette, QGQ; Stevens Point, OVVZ; Ra cine, SZL; Appleton, IVE; Eau Claire, MUM; Menomonie, WDK. HKL is new EC member. CWZ has been working over a 3.5-Mc. Command transmitter and receiver. Racine
72
Megacycle Club members BVG, CFP, FKA, HHM, KZZ, and PTN participated in National Radio Week with an interview over WRJN. LBC, Manitowoc, worked DDG, Sheboygan, and DDG worked TQ, Milwaukee, on 144 Me. IWT is new OO. ARRL, FCC, and club meetings on proposed regulations have kept GPI busy. KXK knocked off VQ5 and EKI. The Mancorad Club elected FMH, chief op.; LBC, asst, op.; JAW, keeper of the log; RKT, operations mgrt Officers of the Neenah-Menasha Radio Club are DXV, pres.; RNZ, vice-pres.; VII, secy.-treas.; GJY, act. mgr. A new power supply and 813 final is the answer to a "bigger" signal from FCF. The Rock River Radio Club is proceeding with emergency organization plans. HFV's mobile rig put him on 28-Mc. 'phone. ESJ is busv with the organization of TCPN. CIH, BCF, BTD, BQM, JNU, WJH, and EXW took part in the Sept. F.M.T. CIH topped the list with an accuracy of .00002%! FYP has a new 28-Mc. beam. The Green Bay Mike and Key Club elected G. Van, pres.; H. Haskins, vice-pres.; 0. Davis, secy, and EC; O. Thompson, treas. Traffic: (Oct.) W9ESJ 642, RQM 102, CBE 85, IQW 84, FCF 70, SZL 57, CWZ 55, LFK 54, FZC 48. VHA 46, DND 23, YCV 23, SFL 19, IVE 18, HDZ 17, FXA 11, BZU 4, DJV 4, MUM 3, EIZ 2, SIZ 2. (Sept.) W9IVE 18.
DAKOTA DIVISION
qOUTH DAKOTA -- SCM, J. S. Foasberg, W0NGM -- O OLB has changed to a.m. modulation on his rig and also says that the Milwaukee Railroad Net is getting started. Anyone interested in this net (c.w.), please contact OLB. Fred also is a wheelhorse on the South Dakota c.w. net. GCP, the RM, says that the new net set-up is working out FB as far as he is concerned. It does give an outlet for traffic in any direction and should make for rapid deliveries if enough stations check in. Bill points out that he needs more stations on the net and that the South Dakota net is slow speed, "unless the guy at the other end is a hot shot," to use Bill's words. The Mitchell Club is ARRL affiliated and now has the call ZSJ. Code lessons may be conducted on 28 Me. in Mitchelt Strong winds in the State in October wrecked several beams as well as taking down a few towers. Traffic; W0GCP 35, OLB 23, FJS 7.
DELTA DIVISION
A RKANSAS -- SCM, Marshall Riggs, W5JIC -- OXU is A getting the DX bug on 7 Me. lately. OCY is about ready for 3.85-Mc. 'phone. OXU needs two states for WAS on 3.5 Me. NBG is new EC for Faulkner County and has worked up a good emergency set-up with several 654s. QIP is on 7-Mc. c.w., being recently Licensed. OCX is run ning 105 watts to 274N on 3.5 Me. with good results. He also has a p.p. 810 rig under construction. NCM is building all-band 813 rig. AUU is inhabiting the 3.5-Mc. band now. HPL has the rig back on 3.5 and 3.85 Me. Traffic: (Oct.) W5DRW 291. LUX 128, FMF 99, OXU 46. (April) W5DRW 659.
MISSISSIPPI-- SCM, J. C. Wallis, W5DLA --Ef fective Dec. 1st MUG, Floyd Teetson, of Hattiesburg, will succeed JHS as SEC for Mississippi. As SEC we know Floyd will do his very best to serve you. Many thanks to Norman for his sincere efforts during his term. LN has been re appointed PAM and will have the kw. rig back on soon at new QTH. QLT, at Biloxi, has been appointed OBS. Ex-4PBQ now is 5QDL at Isola, has 250 watts on 28 Me., and is moving traffic for the KH boys. ZVO is on again after a short absence. WZ, the RM, is working in the Rebel, TLAP, RN5, and Magnolia Nets. Activity is confined to traffic-handling. DEJ, in Meridian, is working in the RN5. We welcome back to our section IHP, whose new QTH is Natchez. LPL has moved to new location and has to put up new skywire. We wish you all a Happy and Prosperous New Year. Traffic: W5WZ 113, JHS 43. kYC 15. QLT 13,
ANP 10, HAV 8, OMK 8, DLA 5, QDL 4, DEJ 2. TENNESSEE -- SCM, Ward Buhrman. W4QT --The
following ECs were on the job and made reports to the SEC: BAQ, ETN, FLW, FWH, HHQ, KKR, LCB, MEU, and PSB. Memphis reports 19 EC stations participated in the Simulated Emergency Test, and reports from other spots in the section indicate interest in this activity was generally good. CZL claims to have the section's hottest emergency gear, capable of going into action any place, any time, all in a matter of seconds. ZZ also lays claim to a
record; his QTH has not changed in 22 years and in fact the station has been operated in the same room for that length of time. LNN is a newcomer to the BPL ranks, and aided by new electronic key should remain in the upper bracket on the traffic list. FLS is working on his third kw. He just doesn't like to change coils. Traffic: W4PL 1545. LNN 608, APC 307, NNJ 249, ETN 69, BAQ 45, FDF 43, CZL 24, NFS 6, FLW 4, LCB 4.
GREAT LAKES DIVISION
KENTUCKY -- SCM, W. C. Alcock, W4CDA -- Three hundred sixty-two messages for October! Not bad, but why don't you 'phone stations handle some? The KYN (Continued on page 74)
MALLORY' RAM BULLETIN
^JYMoer. TO &UESS
NOW / KNOW
With almost 100 different Mallory selector switches from which to choose, it is understandable how the average amateur may find himself in a quandary when he must choose the one switch best suited for a particular job.
For that reason, we are devoting this edition of the Ham Bulletin to a few comments regarding the use of Mallory switches in typical amateur applications. It is hoped the following comments will prove helpful the next time you have need for one of the Mallory switches.
TRANSMITTER BAND SWITCHING. The #160C series "Hamband" switches are designed especially for low power transmitter use. Styles are available for switching 1 to 5 trans mitter stages to 4 predetermined hands. Low loss ceramic insulation is used throughout, and heavy duty terminal lugs, to which the transmitter coils may be fastened, are featured.
TRANSMITTER METER SWITCHING. Two special meter switches are available. The # 1400L switch for low power transmitters, enables a single meter to measure up to 12 separate circuits with complete isolation between circuits. The #I5IL is for use in transmitter service up to 1500 volts DC. A common meter may be used for measurement of 5 plate or screen circuits.
RECEIVER BAND SWITCHING. For receiver service up to 30 MC., the # 1200 series switches are recommended. High-grade phenolic insulation is used, and various combinations up to 12 circuits, 6 bands and 6 sections are available. Above 30 MC., the ceramic insulated #I70C and #180C series rotary switches are ideal. Combinations are available for switching a maximum of 6 circuits to 5 bands.
TEST EQUIPMENT SWITCHING. Almost all Mallory switches are suitable for this service, however, the #13124L, 24 point tap switch, and the #152L, 6 position, 2 circuit shorting switch are especially valuable for test equipment use. The # 13124L is par ticularly satisfactory for volt-ohm-meter construction, while a swell 6 band utility test oscillator may be built around the # 152L.
In addition, the amateur will find occasional use for lever action switches, single and multiple push-button switches, and jack switches, all of which may be had from your Mallory Distributor.
Incidentally, your Mallory Distributor will be glad to discuss your switch problems with you, or, if w e can he of help, simply send your requirements to us, c/o P. R. Mallory & Co., Inc., Box 1558, Indianapolis 6, Indiana.
P. R. MALLORY & CO., Inc.
INDIANAPOLIS 6
INDIANA
MallorY
73
Net, on 3600 kc. daily at 7 p.m., Sundays at 9 a.m.. con tinues to improve, although more towns are needed for bet ter coverage. The KYB 'Phone Net (Blue Grass) continues popular on night schedules, with the KYP Net operating mornings. What about this new Corn Crackers Net starting up? BAZ says Trunk Line J will be on 3565 kc. It will func tion as the 9th Regional Net, with coverage on Kentucky, Illinois, Indiana, and Wisconsin; also relays for Tennessee, Alabama, Florida, and via ETN to Pennsylvania, Virginia, and West Virginia. VD keeps northern Kentucky open on KYN Net. Keen up the nice work. Chuck! FKM spent all of October on traffic. VP made an excellent score in the Fre
quency Measuring Test and will get a higher rating as Official Observer. BXU missed only two net sessions during the month, which is a splendid record. JCN can only get on the KYN Net once a week, but other Louisville stations fill out the week to help out. Don't be bashful about net opera tion. Write BAZ for details and join up! For the Kentucky nets, the SCM suggests the following as our 1949-50 slogan: "Originate more messages for net operation." If you can't think up a message, maybe you need a shot in the arm. Traffic: W4BAZ 112, YPR 79, NBY 60, CDA 38, MWX
24, BXU 21, FKM 10. JCN 10, VD 8. MICHIGAN -- SCM, Robert B. Cooper, W8AQA --
Asst. SCM c.w., Joseph R. Beljan, 8SCW. Asst. SCM U.P., Arthur P. Kohn, 8TTY. SEC: GJH. PAM: YNG. RMs: GSJ, UKV. New appointments: ORS to DWB, OO Class I to TDO. OO Class III to SWF, OO Class IV to ENE. UUS is active again with OO work after the completion uf his summer's program. Your attention is invited to the para graph in "Traffic Topics" in November 1949 QST. Please note the universal questioning of the accuracy of the traffic totals. Your messages should be on file at your station and should you be requested to furnish proof of a total the ob serving of this caution should relieve you of any embarrass ment. TTY deserves commendation for his work in laying the foundation for a procedure whereby the FCC will hold examinations for amateur licenses in the Upper Peninsula. YDJ makes the official announcement that the Midwinter Hamfest will be held in Grand Rapids Feb. 25, 1950. DLZ reports very good liaison between Holland (Mich.) and Grand Rapids via the GREN. YNG can be found pushing the Transcontinental 'Phone Net on 3.85 Me. QBO/ATB reports the YrLRL Net on 28 Me. is enjoying a fine start of the new season and EIR is the new YL member in this sec tion. The last Frequency Measuring Test found MGQ, TDO, BVY, and KRS turning in some very close measure
ments. FX is operating ZZ now that the summer season is over and SOW can no longer operate from the cottage. ZHB promises to do all possible to join the gang on QMN. URM finds married life highly competitive with his amateur activities but hopes to work out a sensible solution. AYV has crystals for the Eastern Shuttle Net and will report in for traffic. UAS reports very favorable progress on the part of the Motor City Radio Club to obtain property for the club-house location. SWF is very happy with his 55-ft. support for his new four-element beam which should boost the coverage on his Official Bulletin Station work. MCV is active on 144 Me. and we hope AQA can find that signal some of these days. OAF says the traffic is slow in his area, in fact matching the thermometer, however the DX is very good. Traffic: W8N0H 1150, SCW 249, RJC 233. CRH 60, AQA 56, YMO 40, DLZ 39, YNG 29, QBO 17, UGD 15, BVY 8, LR 8, YFI 8, ZBT 8, TQP 6, MGQ 4, ZZ 4, EGI 3, FX 2, ZHB 2, DPE 1, IV 1, URM 1, K8NAG 1.
OHIO -- SCM, Dr. Harold E. Stricker, W8WZ -- Asst. SCMs, Charles Lohner, 8RN, and C. D. Hall, 8PUN. SEC: UPB. RM: PMJ. PAM: PUN. The results of the ( »round Wave Contest sponsored by the Cleveland Area Council of Clubs is as follows: Cleveland stations in order of placing are WDQ, AJW, AJH, OKU, BVN, WML, and BLB. WDQ worked the longest distance. Out-of-town sta tions in order of placing are DZJ, BFH, SRS, DMJ, BSR, BPN, and VE3BJJ. The Cuyahoga County Simulated Emergency was participated in by local mayors, fire chiefs, and the military services. PBZ, the new EC, is to be com mended for his efforts. A slow speed net is operating Sundays at 10:30 a.m. on 3700 kc., and the Cuyahoga County mobile emergency frequency is 29,160 kc. From the Carascope: We are all saddened to learn of the death of TO. He was
very active in Columbus amateur activity and his passing was deeply felt by all of us. WRN states that 50 and 144 Me. have been very good and that quite a few stations have been
coming through. The October Simulated Emergency Test was a success. The center of operations was Westerville and the emergency was a blizzard. Those participating in the test were WYH, the EC, WAB, OWA, HAM, ABO, and EYE. From the Q-5 of Springfield: For the past several weeks JRG has been engraving all certificates issued by your SCM. GM2DYP visited the October meeting. From the Bulletin of the DARA: An auction was held at the meeting and some good pieces of equipment were bought for a song. The Dayton boys have become traffic-minded lately. ZOF is communication manager for the club and two new ORS, ZJM and YCP, have been appointed in Dayton. OVL states that TVI complaints have dropped to zero since the two Dayton TV stations have come on the air. From the VoiceCau: ETV is a new ham in Youngstown. He is 12 years old and the son of IOO, who is the EC for Youngstown. IOO
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was host to the Mahoning County Amateur Radio Assn, at its October meeting. The next meeting will be held at the home of CUI. YKU is a YL in Youngstown. CMS has new 6-over-10 beam with 4-125A final. WWK is operating 10-11-meter mobile while attending college. PMJ sent in a nice report on stations QNI on BN. FNX has built a new Signal Shifter so he no longer is rockbound. LBH reports
some 420-Mc. activity around Akron and has worked 4 stations to date. QBF will be mobile airborne on 3.85 Me. week,ends. JFC is working 28-Mc. c.w. mostly at present. ETS is a new ham in South Euclid. WE is on more now that the WX is cooler and the TV programs on an hour later. PIH is working BN, 8RN, and EAN and has a nice traffic total for the month. AQ still is working on TVI. BUM works on 28 Me. mostly when able. R0X and the gang from Cleveland visited one Sunday, ZJM worked 227 sta tions and 56 sections for his first CD Party. PUN is active in ORV, OEN, and DH Nets. YFJ has new 100-watt final and says he is getting out well on 28 Me. TZO finally made 7-Mc. WAS. DAE is NCS for BN and ESN on Mondays
and Saturdays. HB had a total error of zero in the last Frequency Measuring Test. MRG has moved from Cincy to Gallipolis. OUR is on BN, MARS, and CORO. SJF leads in traffic total for October. RN finally got his pole up for his 3.5-Mc. vertical. WAV did 22 hours of observing in October. Traffic: W8SJF 248, DAE 155, PIH 140, HOX 99, PMJ 48, PUN 46, RN 43, PNY 38, OUR 35, YFJ 33, ZAU 32, WAB 30, BEW 20, EXI 19, ROX 16, YCP 14, DXO 12, TAQ 10, AQ 9, LCY 7, DZO 6, BFH 5, WE 5, LBH 3, JFC 2, QIE 2, BUM 1.
HUDSON DIVISION
PASTERN NEW YORK -- SCM, Fred Skinner, W2EQD JLi -- SEC: CLL. New manager of the second regional net
is CLL, replacing LRW. CLL and TYC made the BPL, the latter for more than 50 deliveries. N YS8 Net has an average attendance of 7 stations each night, with 44 different sta tions reporting so far. NCSs for NYSS are CDQ, PHO, OUT, and YGW. CDQ also reports into TLS. BRS now is going after DX and worked his first European, a GM, with 6L6 oscillator. The SARA is building a club emergency station. WWK is working 3.5- and 3.85-Mc. mobile. The Schenectady County EC unit drills on Thursdays at 1930 EST on 144 Me., 1945 on 3950 kc., 2000 on 3700 kc. New officers of the SARA are EFU, pres.: CRE, vice-pres.: VUI, secy.; GYV, treas.; KUJ, BKW, and TYN, directors. CLL, NtV, RYT, and EQD held an "old home week"
luncheon during the Hudson Division Convention. BYF gave a very interesting talk at the WARA meeting. CLL sent out four OO notices. In reporting traffic, please follow the rules on page 66, Sept. QST, Note that relayed messages count ONE under RECEIVED and ONE under RE LAYED, not two under RELAYED as in the old system. Traffic: W2CLL 512, EQD 295, TYC 225, PHO 121, GTC 38, AUS 25, EFU 18, BSH 14, BRS 1.
NEW YORK CITY AND LONG ISLAND --SCM, George V. Cooke, W20BU --SEC: BYF. RM: TYU. EC reports were received this month from EI, Nassau County
EC; WHB, Manhattan EC; TUK, Hempstead-Garden City EC; and SYW, Northern Queens EC. The job of EC for Brooklyn is now vacant. The following is a list of ECs now on the books and the territory they cover: FI, Nassau County; OXM, Mineola; TUK, Hempstead; JXP, Port Washington; GQP, Inwood; KTF. Baldwin; ANN, Lyn
brook; DUS, Wantagh; YKM, Bethpage; JND, Syosset; RTA, New Hyde Park; WHB, Manhattan; SYW, Northern Queens. We need more ECs, one in each community. Write SEC BYF with your recommendations. Nassau County's report on the Simulated Emergency Test states 34 stations participated, 22 on 144 Me. and 12 on 3.5 Mo.; also 4 mobiles on 144 Me., 3 cars mobile on 3.5 Me. and 2 maritime-mobile. One fixed portable at Red Cross Headquarters at Mineola acted as control, Queens AEC carried on in good order with increased stations coming in and working from a prearranged plan. BVL, Nassau Radio Club, finally got on 144 Me.
WWN got his Class A license at last. Srl and SMQ work maritime-mobile every Sunday afternoon from the boat. CSO upgraded to Class I OO. MPL, CJI, and YIR secured their OO papers. VAF is new ORS in Babylon. RTZ built a new VFO and put up new H-wave on 3.5 Me. The Knicker bocker Radio Club, in 9th Regiment Armory, attained affili ation this month. AZS put new Johnson three-element beam on that new mast. RW Q reports DX really improved with new p.p. 4-125s. TYU helped OBU put up "new" antenna then got the bug himself, a 103-ft. flat top with 82.5-ft. 300 twinax feeders. "Pop" schedules NLI, EAN, 2RN, and W6CE on Saturdays and Sundays, and requests those inter
ested in traffic to look for him on the NLI Net, 3710 kc., at 7:00 p.m. Mondays through Fridays. EC asks that stations with West Coast traffic call CQ TLAP, 3630 kc., 9 to 9:30 p.m. when frequency is monitored. Can anyone help the Empire City Radio Club locate meeting rooms in Upper Manhattan? If so, contact SJC or PRE. TUK's biggest kick
of the month was handling emergency traffic from KP4DJ on 3.5 Me. Ph5 is getting in some fun with 'phone patch work by passing calls for YV4AA,>W5KAU, and HU1FG, and converted 32V-l to 32 V-2, eliminating most of the TVI.
(Continued on page 76)
W1ATE W4KFC
CHOICE OF CHAMPIONS
Top operators of the 15th annual ARRL DX contest again have proved the superiority of Eimac tubes.
Highest scoring CW operator W8BHW, Rolf Lindenhayn, powered the final amplifier of his rig with a pair of Eimac 205TH triodes.
For the second straight year Ist place phone went to W2SAI, J. Dawson Ransome. W2SAI used 4-250A tetrodes for his 1949 win.
WIATE, C. R. Knowlton, also used 250TH's for the 2nd place phone position. Third place CW went to another tet rode user W4KFC, Vic Clark, with a pair of Eimac 4-l25A's.
Benefit by the experience of these top operators . . . Depend on Eimac tubes to help you get more out of amateur radio.
W8BHW
"The rig here has been the same since the new start in December '46. A Temco 75-GA drives a pair of Eimac 25.0TH's In final and the original 250TH's are still in there. In between contests, I've filled up sixlog
; books with contacts in 209 countries and 40 zones. Also was world high in the 1947 VK contest on CS! and second to XF1A on fone."
W2SAI
"As you know I used a great many Eimac tubes in the past and at the present time I am using Eimac tetrodes exclusively intransmitter, both in the final amplifier and as modulators
W1ATE
"I have used Eimac tubes in my final amplifier in every s--w--e--e,,p,,stoaoknetsesatnds: iDnXce 1939 without failures or trouble."
W4KFC
"4-125A's were good for 490 contacts in 84 countries and 34 zones in 42 hours of CQ DX contest«"
The 16th ARRL DX contest is just around the corner. Modern ize your equipment now . . . use your skill plus Eimac tubes to earn a winning score. Complete application notes are available in a packet of data titled: "Tubes for Amateur Service." This information is free, write for yours today.
EITEL-McCULLOUGH, I N C
San Bruno, Califo r n a
EXPORT AGENTS: FRAZAR AND HANSEN. 301 CLAY STREET
SAN FRANCISCO 11. CALIFORNIA. U S A.
242
75
Watching a Bell Lab. demonstration induced NZJ to dust off the 10,000-Mc. gear and earned him his OEG Certificate. OTA changed his YLs status to the XYL class. The ÜHF
Club in Jamaica has helped 8 teen-agers to secure tickets the past year. BZQ is a new call in N.Y.C.-L.I. WHB is acting as NCS and RM for 80-meter c.w. AEC net, 3600 kc., every Friday at 8:00 p.m. LUW has a 203P on 28 Me. with 30 watts, KDC earned OPS and now has a gallon on 3.85 Me. OQR is maintaining daily schedules with DLs with 'phone patch work on this end. QAN, BTA, GG, FI, BYF, and TYU handled election returns from Nassau County on 147.9 Me. with destination at WNYC. WZG has new HQ129X and worked 4 Gs the first time he turned it on. North Shore Club has GX heading up extensive TVI program and reports tremendous results. 5OZC now is permanently in the section and the latest member of the Lake Success Club. JVC set up schedule with XYL DL4KS and arranged for two brothers to meet after 30-years separation. BZH is another new ham here. JBQ attained ORS. Traffic: W2TYU 1651, J YR 614, PRE 577, OBU 522, VNJ 402, VOS 202, BO 156, OUT 94, EC 83, TUK 62, CSO 43, YIR 24, LGK 16. SJC 16, YDG 12, PF 10, MPL 7, BGO 5.
NORTHERN NEW JERSEY --SCM, Thomas J.
Lydon, W2ANW--'The N.N.J. c.w. traffic net meets on 3630 kc. at 7 p.m. Monday through Saturday. The N. J. 75-meter emergency 'phone net meets at 9 a.m. Sunday. NJR has moved into ins new home and is operating on 3.85 and 28 Me. with single sideband rig. AZW has four-element
close-spaced 28-Mc. beam on 50-ft. tower and really is working them. QPS has two Abbott beams in phase on 144 Me. AXJ is on 28-Mc. mobile. The Tri-County Radio Assn, of Plainfield has completed its new station at Red Cross Headquarters. HNY has been appointed chairman of Com munications Committee for Red Cross Disaster Control at Plainfield. MEW has moved to Pittsfield, Mass. AOW ad
vises that Spiritual Hamfest will be held on Sunday, Jan. 8, 1950, at 11:00 a.m. EST in St. Mathews Protestant Episcopal Church, Hudson Boulevard and Fulton Ave., Jersey City, N. J. The Reverend Albert E. Martin, B.A., whose call is BWO, will be the officiating minister. His topic wifi be "God Calls CQ." Traffic: W2VJN 189, KUS 72, OXL 46, ZEP 44, NKD 20, AWY 19.
MIDWEST DIVISION
TOWA -- SCM, William G. Davis, W0PP -- The Dubuque 1 boys will miss AXH, who has moved to McGregor. The office of president of the Dubuque Club will be taken over by William O'Rourke. BHO leaves McGregor and my in formant says his new parish is Cresco. USD reports from Bettendorf. The Des Moines Club had ten mobile rigs out during the Simulated Emergency Test and gave a first-hand demonstration for Mr. Mcllrath, head of Iowa Red Cross. UHC and SQQ have organized a new net, the "Transconti nental 'Phone Net," and are meeting with great success. TQG finally got his 48th state and his receiver blew up before the QSÓ was finished. WRM, an old-timer, is back on
the air with a 32V-2. The Burlington Club enjoyed the slides of the ARRL Headquarters station. WMU renewed ORS appointment. The Council Bluffs and Omaha Clubs held a hidden transmitter hunt recently. LHZ found the trans
mitter and won twenty bucks. JRY has a pair of 4-125As on 144 Me. QFZ is on 144 Mo. with an 829 final. AED, BAL, CK, DIB, PP, and ZQF are neglecting ham radio to grunt and groan W.H.O.'s new 50-kw. a.m. in place. HMM and AUL are busy with organizational duties in the new traffic set-up. TLCN reports 26 active members, with QVA as NCS. FP has been televised so 3.85 Me. won't be the same anymore. LJF has new 310B. PP finally got the 28-Mc. mobile installed. HQA has new transmitter on the air. UAO is new on TLCN. Traffic: W0QVA 88, WMU 84, NYX 60, SCA 49, VRA 46, USD 2.
KANSAS --SCM, Earl N. Johnston, W0lCV--The Kansas University Amateur Radio club elected GOV, pres.; AJV, vice-pres.; SKZ, secy.-treas.; and 3NUZ, act. mgr. Plans are being made for code and theory lessons on 28 Me. from AHW, the club station. RXI and NUZ report into Kansas `phone net and YZF and 7NIE report into the c.w. net. New club sponsor is Prof. James Wolf, 3NTN. ZWB is new licensee in Lawrence. DYX, of Norton, has 28-Mc. 'phone in the car. AHA and ROY have tri-weekly schedules with their sons, YOE and YZF, at K.U. YQQ is new call in Independence. AHA has Class A ticket. SSB is active on 14 Me. with 500 watts into a pair of 8005s and 811 modu lators and twin triplex antenna. Members of KVRC, To peka, under the direction of new EC, UPU, had an interest ing Simulated Emergency Test Oct. 16th. 10-80-meter bands were used, including several mobiles and ZMC walkie-talkie on 28 Me. AAZ handled actual emergency traffic from his mobile, assisting in a highway accident not directly to the NCS, K0NRZ, but through K6NMC, in California, with Ray Víckland, IOL, of Topeka, at the mike. BNU, Chanute, reports activity on 3960 kc. Sat. a.m. in C.A.A. Net. TD W is active on 3.5 and 7 Mo. using BC-459 with 25 watts utid a BC-696 running 40 watts. He now has 35 states toward WAS on 7 Me. HVL participated in Frequency Measuring Test. Traffic: W0WGM 109, NIY 72, YOS 48, BOE 21, FDJ 19, AHA 18, KXL 17, BNU 15, 1FR 14, AHW 3,
TDW 2.
MISSOURI -- SCM, Ben H. Wendt, W0ICD --Ap pointments: OZS and EBE as EC, WRQ as OPS, and EGA as Assistant SCM. New Springfield hams are WEP, ZMF, YHL, and VQM. In a recent ARRL Frequency Measuring Test DHN scored with an average error of 446 cycles in three readings. Both of Missouri^ main nets are in full swing, taking good care of the traffic coming their way. The old `MOARKY" has been reorganized with OMG as president and MFN as secretary. MOARKY invites all Missouri and Arkansas hams to join. IAD delivered a IO meter beam to LF and found ADC, PFM, SOM, PKI, ZAC, and WIY on hand to assist in the beam-raising cere monies. UER takes the bull by the horns in getting on 3,85-Mc. 'phone with 12 watts. He's doing OK, too. The Joplin Club was active in the Simulated Emergency Tests with its AEC group. DEA and GZR relayed much of the traffic of the event. The Kansas City AEC also participated, with NIY relaying the bulk of the long-haul traffic. QAC has moved to a QTH where 110-v. a.c. is available. NNH left some radiogram blanks at the County Fair but the pub
lic didn't seem to understand. ARH now has 101 countries on his list with the addition of FE8, ZE2, and VQ5. WAP is rebuilding his entire rig with 1625s and regulated power supplies. UXT is working 3.5 Me. and hopes to be on 160 meters soon. TZX erected a new center-fed 3.85-Mc. an tenna. PLJ reports 144-Mc. activity picking up in his locality. Traffic: W0QXO 194, PM^ 37, DEA 23, CGZ 22, KlK 20, NNH 15, PMI 14, WAP 8, ICD 7, QMF 3,
GBJ 2. NEBRASKA -- SCM, Scott E. Davison, W0OED --
The Nebraska nets are beginning to function in fine shape. The Hastings Club elected PLF, pres.; LZO, vice-pres. and program chairman, and RXU. secy.-treas. ILS has left the Hastings Navy Depot for new duties. GDB has moved to the W6 area and sends greetings to the Nebraska gang. FM W is ready for any emergency with equipment on 40, 80, and 160 meters. YLC put up new antenna. FAM has been appointed RM. IDR is being heard on 160 meters. BDO is a busy guy at KCNI. AYM reports for SENRC. VOI has been elected trustee of the club station for which the club hopes to get the call of RUJ in memory of their former member who gave his life in World War II. VOI is sporting a new Collins 32V-2 transmitter. EDI has a new mobile rig on 3.5-Mc. 'phone and c.w. Thanks, Fran, for the nice report on Lincoln. FLF has new windmill tower in the back yard with 14 Me. beam and two TV antennas on top. J PI has new 28-Mc. beam up. VEC says his 28-Mc. mobile worked FB on vacation trip. JLD is attending the University this year. CMS moved recently to the Lincoln area. JDJ is building a new mobile rig. FAM is the Nebraskan contact with Regional Net, with FQB first alternate and KJP assistant. Your SCM is desirous of lining up an Emergency Corps station in every city in the State where an amateur station now exists. Traffic: W0KJP 132, GMZ 126, FQB 56, FAM 42, JDJ 27, FMW 16, THF 14, DMY 13, IXL 5, KPA 5.
NEW ENGLAND DIVISION
CONNECTICUT -- SCM, Walter L. Glover, W1VB -- vJ BHM reports a score of 1107 pointe in the CN Party and 53,820 in the CD Party. BVB has his 250-watt final about ready for the air. TD reports a new ham in Hamden, SLR. FTX is down to 15 watts. RUP is off the air as he is moving to New Britain. JQD furnishes a fine OO report. BGT has been appointed EC for Naugatuck. The Simulated Emer gency Test certainly created a bunch of traffic in this section and put many wf the gang in the BPL. AW schedules 3AKB, 4PL, 7CZY, 6CE, and 2BO. The Nutmeg Net meeting was held at the club rooms of GB in New Haven «on Nov. 12th. The attendance was the best ever, and many problems con nected with this season's operations and the coordination with the National Traffic System were discussed and ironed out. The following are the NCS of the net for the winter season: DAV, Mon.; RWS, Tues.; ORP, Wed.; KV, Thurs.; VB, Fri. Any Connecticut station is welcome to join the net, and it is necessary only to report in any evening. HYF has outdone himself with the latest net bulletin, which includes clear instructions for net procedure. Anyone can have a copy by contacting Rog. VW reports the gradual organization of a Connecticut 'phone net. The Connecticut QSO Party turned out to be a great success and a lot of fun. At this writing the high scorer seems to be LVQ with a score of 2040 with 60 contacts in 34 towns. VB regrets he was unable to spend much time on the air during that particular week end. Seems as though it might be a good stunt to have these gettogethers more often. Traffic: W1AW 1270, NJM 678, BDI 454, RWS 426, KUO 262, DAV 209, NEM 209, HYF 187, CTI 132, ORP 121, QIS 109, FTX 104, LVQ 84, LKF 81, HUM 80, QVF 56, KV 44, QAK 42, BVB 37, BIH 32, LV 31. KQY 14. BHM 8. SJ 2.
MAINE --SCM, Manley W. Haskell, W1VV --Pine Tree Net, RM NXX, 3550 kc., 1900 and 2200 hours, Mon. through Fri.; Sea Gull Net, PAM FBJ, 3961 kc.. 1700 hours, Mon.'through Fri.; AEC Net, NCS QUA, 3588 kc., 1845 hours. Mon. and Thurs. New ¡OPS is KDE, "Doc" Hinckley. Dark Harbor. Doc's 150-B had a habit of burning out modulation transformers, but he has cured that and
(Continued on page 78)
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77
now is in there with the best of 'em. QUI, EC for the Port land area, had his gang on the job at 0700 hours and the Simulated Emergency all wrapped up by 0900, reporting to the SCM via 144 Me. IGW, EC for Auburn-Lewiston, put on his show on Sunday p.m. AU stations went on emergency power carrying through the proposed action. Mobile 3.85 Me. and portable equipment channeled traffic to LOZ who passed it to the SCM. JRS, QQY, and RYM assisted QUI.
and IGW had EZR, LOZ, GPJ, MFJ, HUT, MML, LPA, and LDC to help carry the load. An unrehearsed detail was the originating of a message at the Auburn Red Cross for
the Portland Chapter. The actual time from acceptance of
the message for transmission to delivery of the reply was 18 minutes! The AEC Net with SEC Parker at the helm gathered in traffic from outlying stations, passing same to the PTN and others. Traffic: W1LKP 298, NGV 171, YA 171, KLH 134, QUA 121, W 109, NXX 78, LBJ 51, FBJ 49, KDE 13, AFT 12, EFR 11, LDC 11, PTL 8, JAS 7, QDO 6. TO 6, KEZ 5. FV 3, NHT 2, OHY 2, ROM 2.
EASTERN MASSACHUSETTS -- SCM, Frank L. Baker, jr., W1ALP -- Our Eastern Mass. Net frequency is 3745 kc., QMJ is the RM. AQE is RM for the 7-Mc. band, AAL is RM for 14 and 28 Me., IN is PAM for 50 Me., LMB is PAM for 14 Me. The following are helping out in the Eastern Mass, section of the National Traffic System: FGT, EMG, QMJ, JJY, KYO, PYM, JCK, LM. hlNK is
OO, Class 2-4. The following have renewed appointments:
IPZ, MD, SH, BWH, MAL as EC; QZS, MEG, AAR, PYM, AQE as ORS; DHX, RP, MEG, AAR, QHC, GOU as OBS; DHX, RP, AAR, GOU as OPS, AQE as RM for 7 Me. We are sorry to have to report the death of ALY, a member of the Eastern Mass. Amateur Radio Assn, for a long time. AEZ is M/M on 144 Me. RAD
moved to Dedham. We are glad to announce the formation of a new radio club, the Martha's Vineyard Amateur Radio Club with MBQ, pres.; MMI, vice-pres.; OQT. secy.-treas. Other hams on the Island are RMJ, SGL, SLV, ex-40WY, SLW, ex^PCZ. ONZ/5 writes from Shreveport, La., where he is on 28 and 14 Me. The EI Ray Amateur Radio Club elected BOD, pres.; AQE, vice-pres.; NXY, secy.: LNX, treas.; PSV, chief engineer; JYC, act. mgr. RTW and OUP attended the Hudson Division Convention and were portable-mobile. The Waltham Amateur Radio Assn, new officers are LHV, pres.: OGV, vice-pres.; Milton Stinehour, secy.-treas. The Eastern Mass. Amateur Radio Assn, had talks by CTW and BB. HSB has new TV set. ORY is rebuilding beam. CQN is on 3.5-Mc. c.w. GDY will be mo bile on 28 Me. The Brockton Radio Club held an auction and swap and a lecture on receiver TVI. The South Shore Club had an ARRL night with BVR, New England Division
Director, and PEK and ICP from Headquarters present. Also an FCC night was held with GM, QVC, and DLT from the Boston office. Q.R.A. held an auction with IIQ as auc tioneer. GGH is on 144 Me. RQZ has a new rig. QZS is on 3.85-Mc. 'phone and has a new rig for c.w. bands. Q.R.A. had CTW at one of its meeting», BB was on during Simu lated Emergency Test. KZ5BL wants schedules with hams in Marblehead and Pinehurst on 28-Mc. VFO. LAZ is on 28 Me. CTZ is on 7-Mc. c.w. AVY needs 28-Mc. VK QSO for WAC. The T-9 Radio Club held a meeting in BVL's cellar. AKN gets on the Brass Hat Net. AAL is on 14-Me. c.w. ILN has new SX-28. MCR had 12 stations on Simu lated Emergency Test. BGW is working DX on 3.5 Me. KYO is back on again and in our E.M.N. and National Net. The New Bedford Club is active again. QMJ had a score of 315,280 in the CD Contest, with 260 contacts in 48 sections. QMJ reports the following reporting into our Net in the past month: ADL, AHP, AQE, ASN, BL, DTS, DWO, EMG, FGT, FTH, ILN, JJY, KYO, LM, PYM, QE, QJB, QKM. QSZ. RBZ, SJX, TY, UE, ZRf AZW, EOB, LKP, HUM, 2OBU, and 3LOD. Traffic: (Oct.) W1QMJ 353, LM 145, FGT 106, PYM 85, TY 54, EMG 53, QJB 38, AHP 34, AAL 31, KYO 31, DMS 28, MRQ 28, MCR 26, ILN 15, PU 15, BDU 13, AKN 6, AVY 6, SJX 6, BGW 4, WU 4, QHC 3. ¿(Sept.) W1QMJ 613, PYM 37, ILN 6.
WESTERN MASSACHUSETTS -- SCM, Prentiss M. Bailey, WlAZW --SEC: UD. RM: BVR. Net frequency 3725 kc., Mon. through Fri. 7 and 10 p.m., net call WMN. BVR, NY, EON, JYH, UD, LTA, IHI, AZW, HNE, KZS, LUD, HAZ, and PYR attended Rutland Hamfest. BVR attended special Board Meeting at Washington, D. 0». and spoke at the South Shore Radio Club at Quincy. EOB worked three new countries for a total of 106, is tops in traffic this month, and placed first in Western Massachusetts
in the CD Contest. RHU finally got transmitter in order for CD Contest and a good traffic total. JE finds time a factor for much activity. BDV is slowly coming out of TVI troubles. MUN was imprisoned at his place of business for
some time because of a strike. ICH now is 7AH from Ari zona. ODU became hitched recently. EFQ is very close to DXCC. RDD is active in Naval Reserve. CWG is on 14 Me. with new beam. RDB writes from Lawrence Academy that he has no time for radio at present. GZ finally hooked North Dakota for WAS. The new 32V-2 really works and sounds pretty.RZG is going to try blocked grid, keying to eliminate his chirp. A new ORS, RzG, schedules SSN, ESN, WMN, 4PL, and 2ZEP. IHI says that in a letter from ex-ICH Joe
scorns our land of ice and snow. New officers of the Pitte-
78
field Radio Club are. OOI, pres.; SAN, vice-pres.; AZW, secy.; PYR, treas.; DPY, act mgr. COI is rebuilding. LLN is contemplating 28-Mc. 'phone for local work. The October Simulated Emergency Test went over very well with activity
reported from the Springfield area, Worcester, and Pittsfield. IHI took the honors for accuracy in FMT with .5 p.p.m. error. MUN was a close second. EFQ and JYH made Class I. Traffic: W1EOB 395, BVR 121, AZW 115, RZG 105, GZ 85, RHU 66, JE 56, IHI 12, BDV 10, GVJ 6.
NEW HAMPSHIRE -- Acting SCM, Clifton R. Wilkin son, W1CRW -- CRW visited BFT while he was in the midst of checking the reports on the New Hampshire QSO
Party. FTJ has 97 countries confirmed toward DXCC. A dinner was held for AOQ. ATJ now is ORS. Joe Beaulieu, ex-AGO, now is operating 4ODX in Birmingham, Ala., and is looking for his old New Hampshire friends on 28-Mc. 'phone. By this time SAL should have his new receiver. POK expects to do some traffic work this winter. A YL operator is a new addition to the NMB family. PVF is a freshman at U.N.H. Other hams on the campus are IRUX, 1RZN, the son of BB, 2AZO, and 6ZTS. 6ZTS has a BC-348 in his room. SIC is having trouble getting the rig geing. ORN is studying law at U. of Kans. LSN is operating HF. If any of you would like to hear some real snappy traffic-handling just tune to 7207 kc. and listen to PAN. They should call that the International Net, as everything from Hawaii to New Hampshire is on this fast net. QJY had a visit from 4MLH and his XYL. Olga also is trying for WAS on 3.5 Me. and has 27 confirmed. EWF is busy with Naw research project. Traffic: W1CRW 351. QJY 63, PFU 41. ATJ 30, MXP 15. NMB 10, KYG 8, EWF 5, QJX 3.
RHODE ISLAND --SCM, Roy B. Fuller, W1CJH -- ¿Assistant SCM LWA has been in attendance at various club
meetings around the section and reports increased activity. 28 Me. shows a large increase with RIT, LZY, RUS, and BGA reporting remarkable results. QLD is working on 3.5 and 7 Me. with a new Clapp oscillator circuit. JER and CPV can be heard Sundays on 3525 kc. around eleven. JMT has become a steeple-jack in the process of tuning antennas. MQY reminds me that not all of the DX stations have good receivers. HRC, GR. PCQ, BGM, AFO, AKA, QC, DHX, and RWM were among those attending the Bean Supper and Auction sponsored by the NAARO. Station reports at
PRA meetings show that a lot of the fellows are building gear, stressing low power and high efficiency. The AQ gang has an 813 oscillator driving an 833A final on 3.5 Me. Hams or would-be hams are invited to AQ, Kelley Ave., East Providence. Meetings are held every Friday night. LZD, RVQ, and SLY, ex-6WTT, are new members of NAARO. 8KT controls the emergency net on 29.080 kc. every Monday at 8 p.m. BBN is a new ORS. Appointments are open for OPS, ORS, OO, and RM. Traffic: W1BBN 10, SKT 4.
VERMONT -- SCM, Burtis W. Dean, W1NLO -- RM: KRV. PAM: PZX. The Green Mountain Amateur Radio Club, Inc. has schoolhouse for club headquarters on the Gleason Road in Menden. The Club conducts code and theory classes every Wednesday night. PTB has 60-ft. tower with three-element beam and TV antenna rotating on top. QXU and RNF visited RHQ recently. The Vt. 'Phone Net operates on 3860 kc. every Sunday at 0930 and Tuesdays and Thursdays at 1800. The BARC wishes to announce sponsorship of the BARC Certificate for working members of the BARC on or after Nov. 15, 1949. These will be awarded to any and all radio amateur stations sub mitting confirmation of contacts with 10 club members on 10-meter 'phone and/or 15 club members on any and all bands. Submit confirmation of contacts with signal report, QTH, and handle to NLO, secy., BARC, P.O. Box 81, Burlington. Vt. Traffic: W1PZ£ 26, AXN 11, AVP 10,
FPS 7, RNA 5, KJG 4, NLO 3.
NORTHWESTERN DIVISION
TDAHO -- SCM, Alan K. Ross, W7IWU -- Moscow: A MVA, of the Gem Net, has accepted an operating-intelli
gence job with the Government. We hope to work him from Washington. Congratulations to GHT on the arrival of a YL jr. operator. WJT did FB in the September Frequency Measuring Test and wonders where the Idaho 7155-kc. gang is. (Friday nights are set aside for 7155 kc.) Pocatello: BDL has new Clapp-crystal heterodyne VFO. GAP has been on the Gem Net. Firth: BAA is building new Clapp VFOKuna: EMT put on the feed bag for MVA and IWU while the former was en route to Washington, D. C. Announcing: The Idaho QSO Party will take place between Noon and Midnight MST, Sunday, January 15th. Use all bands, but we suggest 7155 and 3745 kc. when on `'40" and "80." I will be on 7155, 3745, and 3950 kc. at various times. Traffic: W7EMT 35. DMZ 29, GHT 25, GTN 18, BDL 16, WJT 12, MVA 6, IWU 2.
MONTANA --SCM. Fred B. Tintinger, W7EGN -- SEC: CT. RM: KGJ. PAM: CPY. KGJ, the Net Control of MSN for the last two seasons, is new Route Manager. CCS, with a mobile 522 on 144 Me., has QSOed DSS and DSN in Great Falls when more than 50 miles from town. The Electric City Radio Club holds two meetings a month in the Y.M.C.A. and two meetings a month on 28 Me., with JGG as Net Control. DSN and DSS in Great Falls are
(Continued on page 80)
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using 144.138 Me., the same frequency as the Missoula gang. This may be the start of standard frequency for the Mon tana gang. BQG has new 28-Mc. beam. New calls in Great Falls are NJY, ex-DL4AUW, and NXW, ex-KH6RY. KUH is new EC for the Billings area. A grizzly bear nearly made a Silent Key out of HMT by charging from 50 feet, but Ron dodged around an old shack and the bear was going too fast
to zig. FEE has a 100-watt c.w. rig in an extremely small space for hotelroom use. EQM has moved to Idaho. LEQ is new ORS. A slow speed net is in operation on 3520 kc. imme
diately after 'phone net schedules, or about 8 p.m. Recently
we had eight members all sending about 15 w.p.m., but all
were old-timers good for 25 w.p.m. or better. Traffic: W7KGJ 78, EGN 55, CT 14, COH 3,
OREGON-- SCM, J. E. Roden. W7MQ -- Astoria: COZ reports that the Club has been showing sound movies almost every meeting night on radio, radar, and television. Baker: The Baker Amateur Radio Club now is affiliated with ARRL. NQD is doing FB work on OSN. Bend: GNJ is helping ESJ and JRU share some of the burden of Net Control on OSN. Corvallis: NNU is new EC. Eugene: AHZ spent the summer working mobile. NHA has moved here from the East. LVN is active as Net Control on OEN 'phone with a fine signal, Klamath Falls: QP won a Sonar VFO at the Shasta Convention. MYI is mobile on 1.9-Mc. 'phone. HVD loaded up on surplus gear on his visit to San Francisco. LaGrande: NOB is OSN's dependable outlet in LaGrande. Medford: FRO is new vice-pres. of RVRC. DBZ is the Club's technical advisor. Pendleton: KR is the proud owner of a Collins transmitter and receiver. Portland: The Port land Amateur Radio Club's new officers are JSK, pres.: Ralph Harris, vice-pres. and treas.: Opal Williams, secy.; HVC, act. mgr. ESJ is encouraging beginners and slow c.w.
operators on the Oregon Slow Speed Net on 3585 kc. nightly
at 7:30 p.m. PST. Tillamook: IDP is new EC for this area.
FKA is trying to install 3.5-Mc. antenna on a 100-ft. lot surrounded by power lines. Traffic: W7ESJ 317, AXJ 263, JRU 181, HDN 157, HLF 111, MQ 81, GNJ 68. MVJ 59, BDN 50, FRT 49, GXO 43, OWE 33, FY 28, ADX 27, OU 27, HVD 24, KL 17, KVG 15, JVO 14, NOB 14, HVX 8, LT 5. NQD 3.
WASHINGTON -- SCM, Clifford Cavanaugh, W7ACF -- SEC: KAA. RM: CZY. PAM: CKT. FPP, editor of
HI-MU Journal, the official organ of the Walla Walla Radio
Club, is to be congratulated on the fine job of publishing club activities he has done this past year. H WK is in the hospital with a bad heart -- no doubt due to high-speed traffic work on WSN. AXT wonders what to do with a pair of 304TLs that he paid eight cents for. CZY has new Collins exciter. KCU wants a job as campaign manager in the coming SCM election. EAU is keeping Centralia on the traffic map. CKT reports that WARTS has a 160-meter section in case any of the Class B boys are interested. DXF is doing a fine job
publishing QRM. JJK and KIX send in ORS applications.
LMQ is attending W.S.C. and pounding brass at YH. BZR is working on all-band mobile rig. FWD is rigging up his station so that he can lie in bed and keep late WSNET schedule. NJE keeps c.w. schedules on WARTS Net from Seattle University. LVB is doing a good job as WSN outlet at Sedro-Woolley. JZR is a busy hunter; ne hunts ducks and Bale pigs. ETK sends in nice OO report. FIX reports that
regon nets are using WSN manual and system of counting attendance. ETO is going to blast the boys with a 500-watt Millen rig soon. WY is low power DXing. JC is working lots of hard-to-get DX on 3.5 Me. DRA reports nice visits with FIX and KAA. New officers^ of the Vancouver Amateur
Radio Club are BPW, pres.; KTL, vice-pres.; Don Klimski, secy. KAA is building a new shack and going to school besides doing a fine job as our SEC. Admiral Exner, ZU, is giving talks before radio clubs all over the country on how M/M radio can work to advantage on large yachts such as his. CWN's plate transformer went up in smoke. KWC re ports that the AEC gang in Bellingham helped the police take care of things on Halloween. LXP, ILR, LVO, FOK, and HDG had portable gear in cars while MBY and KWC ran the control gear set up in the police station. The police welcomed them with open arms and they managed to ruin some good plans the kids had set up. Traffic: W7CZY 1896, CKT 702, KCU 394, FIX 322, YH 296, ZU 246, KAA 157, JJK 126, NJE 85, JZR 84, ACF 73, DRA 71, MCU 68, FWD 58, LVB 49, QGN 47, EAU 42, ETO 37, GR 34, BZR 31, APS 29, AXT 23, KWC 23, JC 14, KTL 9, NRB 9, GAT 7, OWN 6, DXF 5, AMZ 3, MVF 1, WY 1.
PACIFIC DIVISION
HAWAII -- SCM, Dr. Robert Katsuki, KH6HJ -- The Hawaii Regional Net (c.w.), otherwise known as the Pineapple Net, now includes the four major Islands: BW (RM) on Oahu, PL on Kauai, PX on Maui, and WW on Hawaii. Traffic increased with the arrival of the "MIKI" boys. MN, our PAM, also has organized a 'phone net linking the major Islands: BI, AY, OB on Oahu; PG on Kauai; RS and RZ on Maui; and IN on Hawaii. ET is EC for Maui. The Maui ARC is celebrating its 10th anniversary. Kauai now has an ARC with IJ as chairman with 26 members. RU has been appointed OBS and is making OB transmissions on
Mondays, Wednesdays, Fridays, and Saturdays at 8 p.m. (Continued on page 88)
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HST on 3950 kc. The Honolulu Amateur Radio Club held a dinner meeting on Oct. 17th at the Nuuanu YMCA. The program featured mobile radio, with CM giving the high lights on his latest mobile rig. Traffic: KH6PL 82, BW 48, HJ 37, PX 8.
SANTA CLARA VALLEY -- SCM, Roy E. Pinkham, W6BPT -- DAE and WOZ are busy working the American
Legion Net on 3.875 Me. each night at 8 o'clock. LZL is off the air at present building a new rig. NX is having fun
tuning up new 10-and-20 beam. KIN is building TV an tennas. AVJ has put up tower to mount his new 28-Mc.
stacked beams. The following were among those who at tended the Pacific Division Convention at Reno: CFK and
family, HC and XYL, and LZL, YQN, NKP, and FYA. HC came home with a major prize, an HRO-7. JSB is trying a
Lazy H antenna on 28 Me. DAE has moved his transmitter from the Red Cross Headquarters to his home QTH and is using it on 3.85 Me. for his net activities. DCL is to be heard on 3.85-Mc. 'phone from Salinas. CIS is checking in on the Valley Net when he can find the time. All stations in the section are invited to check in each night Monday through Friday at 7:15 p.m. on 3.775 Me. There is need for stations in Palo Alto, San Mateo, Salinas, and Santa Cruz in order to give the section net good coverage. Those interested please contact NW for all information. AYL has his kw. in opera tion on several bands from his new QTH in the Santa Cruz
Mountains. Vern is laying out a very good signal. Well, gang, let's have more traffic reports. Please get them in the
mail by the third of each month. Traffic: W6N W 157, JSB 112, ZRJ 58, BPT 49, RFF 6.
EAST BAY -- SCM, Horace R. Greer. W6TI -- Asst. SCM, Charles P. Henry, 6EJA. SEC: OBJ. ECs: AKB. EHS, NNS, IT, IDY, QDE, WGM. Asst. EC u.hff.: OJU. RMs: FDR, ZM. On Nov. 1st TUU passed away. BIL has new Hy-Lite 2-element 20-meter rotary up. OT turned in a nice traffic report under chief operator Bill Nations. FDR is looking for c.w. and 'phone outlets for the East Bay Section Traffic Net. Gang, here is a chance to handle some traffic. ITH made the first Trans-Pacific radioteletype with Philippines with DU1HR on Oct. 18th. YDI reports that OJU has moved 3 miles northeast of Sebastopol with 13 acres for an antenna farm. DTW claims a first with a QSO with AC4BN on Sept. 23rd at 5:45 p.m. PST with his 25 watts. He also has started a code practice program on 28 Me. 3 nights per week. MLZ took a section out of his beam
tower and claims it gives him a more favorable angle of radiation. The North Bay Two Meter Emergency Net meets on Fridays at 7 p.m. on 147.1 Me. with WGM as Net. Control. Have you seen IKQ's 28-Mc. beam yet? KZF is working at Peck's on College Ave. selling wire recorders. Many of the East Bay gang were on hand Oct. 29-30 at the
Pacific Division Convention in Reno. OBJ reports that now sum-mer is over we should put some extra time and effort on emergency work. Your SCM would appreciate a list of all the new club officers for 1950 for his files. We understand the SARO had an FB Field Day on Oct. 6th. The Oakland Radio Club had an Old Timers Night on Oct. 20th. ZM would enjoy hearing from the gang. Your opinions are re quested on a suggestion to eliminate Station Activities re ports from QST, substituting "Station Activity H**ighlights. This would include items that SCMs considered of general amateur interest. Any QST space thus saved would be used for articles on topics such as radio club doings, emergency nets, special organizational effort, etc. Please give this some thought and advise me so I may make a report to the Communications Dept Committee. Your SCM would like to take this opportunity to wish one and all a bright 1950 with all the trimmings. Traffic: W60T 310, FDR 298, YDI 31, DTW 24, ITH 20, WII 8, TI 2.
SAN FRANCISCO -- SCM, Samuel C. Van Liew, W6NL -- Phone JU 7-6457. KG6DI reports the following: KG6DI is making arrangements to rebroadcast wire re cordings of code lessons and official bulletins in cooperation with ARRL Bulletin No. 200. On Oct. 28th, Everett, Wash., time, and Oct. 29th, Guam time, a chess match was held be tween the Guam and Everett chess clubs. Approximately
five hours of solid communication was required. W7IOQ and KG6DI provided 14-Mc. 'phone communications. KG6DI and W7CZY provided 7-Mc. c.w. communications and 144-Mc. communications was carried on between W7CZY and W7IOQ. KG6DI is able to handle 'phone patches wherever possible ©n Guam; during October Clark
handled more than 650 'phone patches. The Eureka AEC gang was active in the Simulated Emergency Test Oct. 15-16. The fellows set up their control station at the Red
Cross office and proceeded with test drill to mobile gear in the area. EC SLX was in charge of the program, assisted by OUT. AUB, FYY, AEY, FXY, BJO. BWV, and K6NRU. Contact with CXO was established and traffic to Headquar
ters and N.R.C. was handled. BME is putting a 522 on 144 Me. GDV is on 28-Mc. 'phone and soon will have ARC-4 on 144 Me. CFE is a new station at Longvale. GXK is working
on a 3.5-Mc. rig and is -building grid dip meter. FYY is ac tive in the Mission Trail Net. FiX keeps nightly schedules on 144 Me. with BJO and FCL. WYP is revamping the transmitter and installing antenna for 7 Me. ZSE is having power-pack trouble. CWB is rebuilding final. ZHE also is re building. BWV is planning a big rig. The San Francisco gang
(Continued on page 84)
83
84
turned out in good numbers to aid in manning the N.R.C.
station, CXO, during the drill period. Over the 48-hour test period about twenty operators maintained continuous watch on 3875, 7100 and 14,050 kc. and 144 through 148 Mo. The Oakland Radio Club station, OT, kindly assisted by han dling a 48-hour watch on 3550 kc. A continuous 144-Mc. channel was maintained between CXO and OT. OT was manned by the members of the Oakland Radio Club. Traffic was not as heavy as expected, the period accounting for only about 80 messages. However, both OT and CXO faithfully stood by their respective watches throughout the
test period. BYS is trying out phase modulation on his 144Mc. rig. VPC now is operating PN Net and RN-6 Net. His traffic activities now are about 60 per cent of his operating time; the rest is divided between rag chewing and experi menting. A new mobile net now active in the San Fran cisco area operates every Tuesday night with CHP as Net Control and may be found on 147 Me. The Net is crystalcontrolled. Crystals may be obtained from EC BYS. On Oct. 23 the local Red Cross chapter held a Simulated Emergency
drill. Radio mobile communication was furnished by the local Emergency Corps, the operators and equipment being furnished by the Golden West Frequency Modulation Club. MXV is building a 150-watt fully automatic-controlled transmitter. BIP now is operating from his old home loca tion. NL is building a new shack. CHP is operating from his new location and is on 144 Me. mostly. Many of you oldtimers who remember Ed Turner, jr., will be glad to hear that Ed is back with us. He now is located in Millbrae with the call NVO. Traffic: KG6DI 902, W6VPC 17.
SACRAMENTO VALLEY --SCM, Ronald G. Martin, W6ZF -- Asst. SCMs: Central Area: Willie Van de Camp, 6CKV. Southern Area: Robert Metke, 6SUP. SEC: KME. ECs: Met. Sacramento, BVK; Walnut Grove, AYZ; Duns muir, JDN; HBM, Chico and vicinity. RM: PIV. OES: PIV. OBS: AF and BTY. OO: ZYV and BTY. Sac. Valley Emergency Net, 146.52 Me., NCS KME. Sac. Emergency
Net (City), NCS AUO. Sac. Valley Section Traffic Net, 29.4 Me., NCS ZYV. Central Area: CKV reports GERC annual barbecue held Oct. 22nd was a huge success. HBM is consistent traffic relay on 144 Me. KRX schedules 5FNV Sundays and 0PXB daily on 28 Me. Southern Area: GDJ has
161 countries verified out of 169 worked. GDO has new 40-ft. steel mast. GZY returned to 144 and 28 Me. QDT cured. TVI on 3.85- and 28-Mc. 'phone rig with Faraday Shields and shielded antenna tuner. CQK is building portable using Command sets. HEM now is Class A. KME works East Coast regularly on 28-Mc. mobile. On Oct. 30th the Emer gency Net furnished communications for the Annual In board Speed Boat Classic with HHC, HMC, KME, GDE, and BLP participating. ZYV received card from ZS6CV to make 'phone WAC. BLP has six-element 144-Mc. wide spaced beam. NBW is running 165 watts to T-55. CTH visited Placer Radio Club to show off new mobile unit. MYL and JIN have 832 on 144 Me, and sixteen-element
beam, also 812 on all bands with 100 watts. ASE has 300 watts to 813 on 28-Mc. 'phone and 522 on 144 Me. with three-element beam. OXG has gone to 420 Me. Northern Area: JDN joined RN6 and is on Mission Trail regularly. The Mt. Shasta Club's two October meetings brought out a large attendance. REB is cruising on 3.5 ana 7 Me. Traffic: W6PIV 235, ZYV 116, KRX 49, ZF 31, JDN 22. HEM 3.
SAN JOAQUIN VALLEY --SCM, Ted R. Souza, W6FKL --Asst. SCM, James F. Wakefield, 6PSQ. SEC: JPS. ECs: VTZ, PHL, AJE, and WBZ. OWL and JPU are on 3.85 Me. with very fine-sounding n.f.m. signals. OHB
wants a new receiver -- a Collins, he says. PHL is pretty busy with the police radio system in Merced. AJE is the new EC for Modesto and vicinity. JWK is building another final -- one for each band is the goal. TFH now is one of the power trust -- a full gallon no less. SRU, the indefatiga ble DX-chaser, still is at it. GRO keeps a busy schedule on 3.85 and 29 Me. PPO, ex-7JEA, is back living in Fresno between voyages skippering a transport to the Orient. Look for Wally on mantime mobile. TV likes traffic sched ules but says he travels too much. TARC station, BXN, made the BPL during the local fair. YGZ expects to forego
single blessedness in the near future. GJO and WBZ made the long trek to the Reno Convention. Other safari parties
going into the wilds of Nevada were PSQ and JPU, BJI and FKL, FYM and his XYL. JPU won the preregistration prize. Traffic: (Oct.) W6GRO 58. (Aug.) W6BXN 511.
ROANOKE DIVISION
NORTH CAROLINA -- SCM, W. J. Wortman, W4CYB -- Hope the gang who made the trip enjoyed the hamfest in Charlotte, sponsored by the Mecklenburg Ama teur Radio Society. Who will be next to hold a hamfest? Any bids? The Thomasville gang is celebrating its second anniversary in the Club, ana is sponsoring a membership drive and a class to help newcomers to obtain their tickets. OFO is working on a new rig for a few more watts. MWN has plenty of r.f. in his shack -- 'tis reported that his walls bulge outward, but he manages a weekly contact with 0QHX. EGF has mobile aspirations on 28 Me. Pat Burt, secretary of the Thomasville Club, is giving us dope that really is appreciated. FXU says that the Kinston Club is
(Continued on page 86)
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Write now for Data Sheet No. 152 describing all the new loudspeakers in the new Genuine JENSEN Wide-Range Series, and booklet, "Let Music Come to Life!"
ensen
wide RANGE
JENSEN MANUFACTURING COMPANY Dirhiw ot the Muter Company 66\l South Laramie Avenue, Chicago 38, Illinois
in Canada; Copier IFire Products, Ltd,, 351 Carlow Avenue, Toronto
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86
undergoing reorganization. Give us some dope. Bob, and luck to OIX. KJS is trying to maintain activity in the BfCN with able assistance from. NXS. How about some of you fellows getting in and helping with the traffic for this area? Any help would be appreciated. HUW is new Net Control for the Tar Heel Net, replacing HGC, who finished a success ful term and a good job. Congratulations, Bob. Activity is picking up on 50 and 144 Me. in this area with DLX and DIS active on 144 Me. and CVQ probably pushing 50 Me. more than any others. Bet I hear about this from some more of you h.f. experimenters -- I hope. Luck to the gang in the New Year.
SOUTH CAROLINA -- SCM. Wade H. Holland, W4AZT -- Applications for ORS, OBS, OPS, OO, and EC appoint ments are invited. The Clemson College Club will partic ipate in MARS. Professor AUT addressed the Greenville Club at a dinner meeting. The Charleston Club will
operate a transmitter at the Charleston County Fair. Western South Carolina 10-meter Net meets Wednesdays
at 9:00 p.m. on 29 Me. and has member stations in North Carolina and Georgia. PVQ is new in Georgetown on 28 Me. OWW is on 144 Me, LIK is on 50 Ma GMP has a
scanning beam and roving oscillator on 50 and 144 Me. at Mine Craft Base, Charleston. OMP is on 160 meters at Manning, and ETF is on 28 Me. NLP is looking for con tacts on 50 Me. from Hemingway. BEM is experimenting with amateur TV in Columbia. DX has a 3.85-Mc. mobile unit. 1IIB is in Charleston with the Navy. LIK, NRC, NTD. and ONJ are active on 28 Me. FNC, LSD, OSC, and PLX are active from Ware Shoals. BSS is DXing on 50 and 144 Me. BIZ is mobile on 7-Mc. c.w. South Carolina and Georgia c.w. nets are combined on 3525 kc. DFC took part in recent Simulated Emergency Test. Traffic: W4ANK 303, AUT 94, AZT 38, IYA 14, CZN 6, OWW 4, DFC 1.
VIRGINIA -- SCM, Victor C. Clark, W4KFGTM« Asst, SCM, Elias Etheridge, jr., 4KYD. JCU reports that the following Lynchburg area hams turned out for organizational meetings of the new Lynchburg Amateur Radio Club: ISA, JAD, JCU, JMX, KBJ. KSV, NPU, ODA, 0KM, PDP, QVL, PED, NDO, and ex-3BRY. JCU is president and PED secretary. William and Mary College hams are op erating a 150-watt rig under the call of MLE^pending receipt of club license. Operators are MLE, JGW, NRO, NHX, 1PGQ, 2BWL, 2CKM, 3PZD, and 0WJG with MLE, pres.; 2CKM, vice-pres.; and Larry Blum, treas. PAM CLD reports VFN is going strong. VN, operating in two sessions (7 and 10 p.m.), attracts about twenty Virginia hams nightly. LAP reported in from an airplane over Ohio on one session! Official Observer CVO is firing up BC-610 for VFN use. QY, back from a CAA junket around the U.S.A., reports visiting 1AAE and 7HRM. ITA. helped a VE ham to obtain some hard-to-get items of surplus equip ment, but had to obtain permit from VE government to mail 'em. KZ5AX, now in Chincoteague, is awaiting a W4 call. 7DU moved to Falls Church. CJS is readying the rig for 3.5 Me. and traffic work. KYD landed 7EMT on 3.5 Me. for first Idaho QSO. BZE rolled up 400,000 pointe in October CD Party! Others participating were FF. IA. IUU, JFE, JHK, KFC, KFT, KVM, KYD, LAP, LPP, LRI, NJV, and VE. IWO, FV, and KVM operated in '¡shone section of the party. Submitting very creditable entries in September Frequency Measuring Test were CVO, IPC, IYC, IYI, LNT, WO, ZV, and KZ5AX/4. New appointees: MLH and OZA as ORS, NAD as OPS, and FF as EC for Fairfax County. KP6AA was guest at PVRC meeting. Traffic: W4LAP 226, MLE 215, KVM 196, KFC 127. FF 91, MLH 86, FV 53, JHK 48, IA 41, KYD 30, IPC 20, PED 17, PAS 7, CJS 6, YEJ 6, CLD 5, BZE 4, IWO 4, ITA 3, QWM 1.
WEST VIRGINIA -- SCM, Donald B. Morris, W8JM -- Consistent efforts on 144 Me. paid off when EP worked 800 miles, only 60 short of the DX record. MIS made history
on 3.85-Mc. 'phone when he retired his 20-year-old 211 for two 807s. BOK now has 3.5-, 14-, and 28-Mc. doublets in operation. JRL is on 28-Mc. 'phone and c.w. with new three-element beam. KWL and FMU visited DFC. EUB is a new amateur in Parkersburg. MIT is president of Parkers burg Radio Club and is experimenting on 144 Me. BNL has new 813 for 3770-ke. traffic. 4IUU visited OXO. BWT is active on 3.5 Me. from Spencer. WSL keeps 'phone schedule on 28 Me. with Holland and is thinking about DXCC. AUJ, OXO, and GBF boosts traffic totals by net activity. I would appreciate it if all active stations would drop me a postal card. YGL has new mobile 10-watt rig for CAP operation on 2374 kc. MARA held Annual Freeze-Ont Party high in the Blue Ridge Mountains using the call SP to snag rare DX. The YLRL is planning a trip to West Virginia for YL contact. Let's try to get at least one YL station active in West Virginia. Traffic: W80X0 186, GBF 185, AUJ 46, DFC 40, BNL 30, BWK 14, BOK 3, JM 3, SP 1.
BOCKY MOUNTAIN DIVISION
( COLORADO -- SCM, M. W. Mitchell. W0IQZ -- SE£s: Ij KHQ and IC. RM: IC. MAN: 7190 kc., 2030 MST.
Mon.-Fri., IC manager. ERN: 3540 kc. (temp.) 1945 MST, no manager appointment. TWN: 3540 koM 1945 MST,
{Continued on page 9Q)
HARVEY does Ît g AGAIN '
RCA Battery VoltOhmyst gì
Type WV-65A
with Completely Self-Contained Power Supply
DESCRIPTION
The Battery VoltOhmyst is a push-pull VTVM with 2-tube bridge circuit, possessing excellent linearity and stability characteristics. Circuit innovations that include zero grid current and controlled inverse feedback produce accurate readings over all ranges.
A high degree of self regulation is obtained without sacrifice of sensitivity. D-C input resistance has the unusually high value of 11 megohms.
A 1-meg. shielded signal-tracing probe makes possible dynamic voltage measurements in signal-carrying circuits, The WV-65A is exceedingly stable in operation. requires no adjustment of zero controls when changing ranges and is essentially independent of changes in both tube char acteristics and battery voltages during normal life.
A neon lamp mounted on the panel flashes whenever the battery is on.
The a-c circuit using a copper oxide rectifier is isolated from the case. The d-c circuit for current measurements is also isolated from the case. Meter movement 2% accuracy. All multipliers 1% accuracy, same as in instru ments selling at many times this price.
SPECIFICATIONS
D-C Voltmeter: Six Ranges 0-3, 0-10, 0-30, 0-100, 0-300, 0-1000 volts Input Resistance...... 11 megohms constant for all ranges Sensitivity (max.) 3.7 megohms per volt on 3-volt range
fc-C Voltmeter: Five Ranges. Sensitivity.,..
.0-10, 0-30, 0-100, 0-300, 0-1000 volts .............................................. 1000 ohms per volt
Ohmmeter: Six Ranges..
,0-1000, 0-10,000, 0-100,000 ohms 0-1, 0-10, 0-1000 megohms
All brand new, first quality, factory-sealed car
*39TM
tons, less batteries.
Kit of batteries $2.50
IN STOCK FOK IMMEDIATE DELIVERY
NOTE: Price Net, F.O.B., N.Y.C.
and subject to change without notice.
USES
The RCA Battery VoltOhmyst is a combined voltmeterammeter-ohmmeter of the electronic type for use in places when the conventional a-c outlet is not available. Internal battery operation of this VoltOhmyst makes it entirely independent of external power sources. It can be used in automobiles, boats, airplanes, rural areas and any other place when the regular a-c power supply is either difficult or impossible to obtain.
The Battery VoltOhmyst may be used for accurate measure ments of a-c and d-c voltage, for d-c current and for resistance. In radio end audio applications it may be used for measuring AVC, AFC and FM discriminator voltages; d-c supply and bias cell voltages; oscillator strength; and resistance of coils, resistors, and insulation. This Volt Ohmyst is quite helpful for measuring the d-c voltage developed across the picture channel of a television receiver when making antenna adjustments. It also is applied to determining when gassy tubes are present, D-C measurements may be made when a-c 1$ present, In addition, this Battery VoltOhmyst is a useful tool for the servicing of all types of modern industrial electronic equipment.
D-C Ammeter:
Six Ranges. .0-3, 0-10, 0-30, 0-100, 0-300 milliamp.
and 0-10 amp.
Voltage Drop. ............. ....450 mv. for full scale deflection
Power Supply:
Batteries.....
......................Four P/2 volt RCA-YS036
Two 45 volt RCA-VS055
Tube Complement. ............ ....2 RCA-1C5GT, 1 GE-NE51
Dimensions......... . .*9% high, 6'4" wide, 5'//' deep
Weight........ ....... .
..........9 lbs. (ind. batteries)
Si® Shipping Weight... ........................ 12 lbs. (ind. batteries)
Telephone:
Luxemburg 2-1500
.1
103 West 43rd St., New York 18, N. Y.
87
HARVEY presents the ELDICO Line
Transmitter Kits -- fop quality com
ponents -- complete to the last piece of wire at rock bottom prices that can be paid off monthly!
TR-1 TRANSMITTER KIT
A conservative 300-Watt phone and c.w. rig 6V6-6V6-6L6813, Class B 811 modulators. All bands, 80, 40, 20, 15, 11, and 10. Exciter broad band, single control PA tuning. Three power supplies delivering 1500 v.d.c. at 350 ma, 500 v.d.c. at 200 ma, and bias supply. Aluminum chassis, tubes, trans formers, capacitors, resistors, antenna changeover relay, meter, wire, hardware and coils included. Electro-Voice 915 high level crystal microphone part of the package. Plug in the crystal and line cord and you're on the air.
Only $179.50 cash or $89.50 down payment plus six monthly payments of $15.75.
TR-75 TRANSMITTER
KIT
Loafing along at 75 watts this is the c.w. man's buy of the year. Simple enough for the beginner to assemble. Uses the time proven 6L6 oscil lator-807 amplifier com bination. Pi-network out
put. Husky power supply delivers 600 volts to the 807.
Complete ... not another bolt or wire to buy, including a smartly styled shielded cabinet to minimize television inter
ference. Unbelievably low priced at..... ...,..,,......,.,,.....$34.95
GDA GRID DIP OSCILLATOR
The most valuable piece of test and measur
ing equipment In the ham's shack would be
the grid dtp oscillator. The "Grid-Dipper"
has taken the country by storm. Amateurs
using it have saved countless hours in build
ing, improving and de-bugging rigs. The
GDA kit builds an exact duplicate of the
Grid Dipper and includes everything from
the special handy case permitting one-hand
operation, down to a complete application
and instruction book. Complete with tube
and internal power supply, range 3 me to
250 me covered in six steps, size 5Vi" x
x 3'
.^,,^$21.50
NOTE: All prices on both pages are Net, F.O.B. N.Y.C. and are subject to change without notice.
MD-100 MEDIUM POWER MODULATOR
100 watts of au> dio, this AM modu lator is designed to be assembled once and put into action , . . with no maintenance problems/ Lineup consists of a 6SJ7, 6J5 audio amplifier driving a pair of 6J5s which drive two 807s. It is an ideal modulator for the quarter kw c.w. rig and is another Eldico complete package. There isn't another thing to buy, it even includes an Electro-Voice 915 crystal micro phone. At the low price of $44.95 this Is the kind of postwar price the hams have been waiting for. Speech clip per, If you want it, $14.70 additional.
MD-40 LOW POWER MODULATOR
40 watts of audio, the MD-40 is a kit of the same superior
parts that go into its bigger counterpart, the MD-100. In
place of the 807s, two 6L6s are used. Complete, including
the same standard communications Electro-Voice 915 high-
level crystal microphone, only......................
..,,$29.95
HV-1500 HIGH
VOLTAGE POWER SUPPLY KIT
Here is a power supply that is designed to take ii. Ultraconservatively rated, will deliver under continuous service load 1500 v.d.c. at 350 ma. Kit Includes plate and filament transformers, two filter capacitors and filter chokes, bleeder, safety plate caps, and all additional hardware, less 866 rectifier and chassis. The total cost is what you would expect to pay for the transformer alone. Complete kit price..,,$29.50
Telephone:
Luxemburg 2-1500
ELDICO of N. Y., Inc.
41-31 Dougtaston Pkwy.
Douglaston, L.l.
BAyside 9-8686
Flushing 7-9173
is «4
I I
SQMP.UIY UIS
103 West 43rd St., New York 18, N. Y.
88
of Transmitter Kits and TVI Filters
At the Hudson Division Convention over 3,000 radio ama teurs saw our TR-1 300 Watt Phone and CW transmitter using our dual TVI filter operating on 10-meter phone 28,686 KC and simultaneously watched the World Series--Channel #2 on television.
Transmitter Dual Filter --TVT-62--
Measurements by certified equipment on amateur transmitter using our dual filter operating on 11 meters (the worst pos sible band for TVI) showed a fundamental signal strength of 612,000 microvolts per meter, with no measurable second harmonic. This was not a relative test, but a certified measurement using the latest RCA Field Strength Meter and recorded in actual Government records.
Come in to Harvey or Eldico. Either store will give you an actual demonstration. Come in and prove to yourself it really works.
HERE'S HOW WE DO IT
Television Receiver Filter Available--TVR-300 For Twinex
TVR-62 For Coax
W2UOL's Eldico has gathered together all of the dope on TVI-ing, all of the data written by experts and then with Eldico engineers collaborated, rewrote, tried and experimented and compiled their own "TVI Can Be Cured" booklet. It's now coming off the presses and available free for just a penny postcard requesting it. Available in quantity for clubs and organizations. Be sure to get your free copy before they are exhausted. Write either store.
LICK TVI-- FOUR WAYS 1. By complete shielding to prevent direct radiation from the transmitter. 2. By the use of line bypasses and brute force line filters to prevent kickback through the AC lines. 3. By the use of W2GX's M derived Low Pass Filter to prevent radiation of harmonics through t-he antenna. 4. By the use of W2GX'$ M derived High Pass Filters to prevent the overloading of the front end of the television
receiver by amateur fundamental signals.
HERE ARE THE TOOLS
· Transmitter Dual Low Pass Filter 40 Me cut off---over 75 db harmonic attenuation. 52-72 ohm input and output. For use at other impedances use an antenna tuning network. Good for I KW input--Negligible fundamental attenuation. No effect on antenna performance.
Model TVD-62....................-................................... $ 7.99 in kit form Coax Dual Filter 10.99 wired and tested
Receiver Hi Pass Filter 40 Me Cut off--No attenuation to signals above 40 Me. Efficient on any manufactured set. Will not affect picture, quality or strength. Available for coaxial or twinex installation.
TVR--300 for Twinex.. .1 $1.98 in kit form TVR--62 for coax..... .[ 3.98 wired and tested
Brute Force Line Filter Similar to ARRL's--Page 508 ARRL Hand book 1949 Edition. Will handle I KW--Com pletely filtered and shielded.
$5.98 in kit form 8.98 wired and tested
(Add 25c To Cover Packing and Shipping Each Filter.)
· R.F. Shielding--Copper Mesh The same type as we used in our TVI-Proofed TR-! shown at the ARRL's Hudson Division Convention. Heavy Duty-- tightly wound--It's expensive but the only thing we know which will do the job. Minimum order--6 sq. ft. 36" wide lengths. Per Sq. Ft. $.85 plus $.50 shipping charge regard less of quantity.
· Shielded Cable Multi conductor--To reduce radiation via power leads, all cables must be bypassed and shielded. 2, 3, 8 and 9 conductor shielded cable available--#20 wire 600-1000 volts insulation. 2 conductor .07per ft................................................ $5.00 per 100 ft. 3 conductor .08per ft................................................... 4.25 per 75 ft. 8 conductor .15per ft................................................12.00 per 100 ft. 9 conductor .16per ft......... .......................................12.50 per 100 ft.
R.F. Bypasses All AC Leads, power leads, relay and switch leads and every connection between chassis should bo bypassed. Use
All in stock for immediate delivery.
our Hi voltage Ceramic for Hi Voltage, our button or feed
thru's for medium and low voltages, our micas for AC,
relay and switch leads.
HI VOLTAGE CENTRALAB 7500V working--50 MMFD.
Tapped for 6/32 screws--The best for RF bypassing--
$.89 each.
BUTTON CONDENSERS--available in various ranges and
capacities. Automatically grounded through mounting screws
50, 100, 180. 500 MMFDS.............. $.18 each $1.80 per dozen
2400 MMFD ................
25 each 2.50 per dozen
FEED THRU CONDENSERS. Just insert in hole in chas
sis, tighten nut and you have a feed through connection
which is automatically bypassed to ground. Available in 50,
55 and 75 MMFD with nuts. 15c each--$1,25 per dozen.
Ceramicon Condensers--Axial type--Temperature compen
sated. Ideal for usage in small spaces--Available in 2.2, 3,
5, 15. 25, 50. 100 and 300 MMFD....................$ .15 each
1.25 per dozen
R.F. BYPASSING COMBINATION #1 Enough to do a thorough job on any amateur transmitter--Con tains 6 Hi voltage ceramicons, 20 button 30 feed throughs and 20 ceramicons. A $16.00 combination for $8.95 per kit.
SHIELDED CABLE--COMBINATION ¿2 Contains 25'--2 conductor shielded Cable, 25'--3 conductor Cable and 25' of 8 or 9 conductor cable (your choice). A $8.55 combination for $6.95
TRANSMITTER FILTER COMBINATION #3 Contains one TVT-62 Dual Transmitter Filter, two TVR Re ceiver Filters (Your choice of 300 or 62 ohms) and one Brute Force Line Filter. A $17.99 combination for $14.98 in kit form A 27.93 combination for 22.50 wired and tested
COMBINED COMBINATION Contains combination I, 2 and 3 plus 12 square feet of H.V. duty copper screen--It's all of the material to really clean up the Kw rig. A $41,58 combination for $35.00 in kit form A $49.10 combination for $39.00 wired and tested
ELDICO of N. Y., Inc.
41-31 Douglaston Pkwy.
Douglaston, L.l.
BÂyslde 9-Ô6Ô6
Flushing 7-9173
103 West 43rd St., New York 18, N. Y.
89
Want to SIMPLIFY DX LOGGING? DRESS UP YOUR RIG?
(Continued from page 86)
Mon.-Fri.. 5NXE, manager. IUN: 3540 kc.. 1900, Mon.Fri., ZJO manager. CS8N 3560 kc., 1830, Mon.-Fri., LZY manager. On November 6th hams from Colorado, Wyoming.
Nebraska, and Kansas converged on Greeley, Colo., for a very fine hamfest. Sixty-six hams were registered and many brought their families along. The surprise of the day was the personal appearance of Edna, the loyal 75-meter SWL.
thanks to the efforts of DD, our Director. Several were interviewed by KFKA on tape recording and the boys heard it on their way home that evening. IQZ and 7IRX were surprised to run into each other after twelve years. They were old orchestra associates "back when.'' Several fine prizes were donated and yours truly, true to form, won nothing. ZJO's traffic total is down somewhat this month
because of elk-hunting QRM. IC is planning a very fine e.w. emergency net and a Denver 10-meter 'phone emer gency net. KHQ reports 75-meter emergency net shaping up well. O* VH and LZY are new OBS. Congratulations to
LLP for a very fine hamfest at Greeley. He plans to make it an annual affair. Traffic: W0ZJO 443, IC 243, SGG 36, DYS
34. LZY 33, OWP 10, KHQ 2. WYOMING ·--SCM, Marion R. Neary. W7KFV---
Wyoming's "Pony Express" 75-meter `phone net operates on 3920 kc. at 0930 Sundays. Stations in northern and west ern Wyoming are needed badly. 144-Mc. activity is increas
ing, with OWZ at Cheyenne and MVK at Laramie looking for out-of-8tate contacts. The Cheyenne Club meets the first Wednesday evening and the Laramie Club on the first and third Friday evenings. Secretaries of other chibs are asked to send in their meeting nights. HDS has been ap pointed SEC. All other appointments are open. Informa tion and application blanks will be gladly furnished. GOH is mobile on 3.85 and 28 Me. IRX and CGK are mobile on 3.85 Me. Wyoming was well represented at the Northern Colorado Hamfest at Greeley, Nov. 6th. Thanks, gang, for honoring yours truly with the office of SCM. Don't forget
to forward your activity reports.
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SOUTHEASTERN DIVISION
ALABAMA -- SCM, Iceland W. Smith, W4YE --The il Alabama Emergency 'Phone Net turned in a fine per formance during the October Simulated Emergency Tests, with I.EN doing his usual fine job as NCS. Montgomery has an active 28-Mc. emergency 'phone net meeting twice weekly on 29,520 kc. MAK is new EC in the Birmingham area. EW still is building super-gain TV antennas on his ham rotary mount. PXO is a new YL ham in Fairfield and is convalescing from polio. GJW has new Collins 32V-1. JYB is n*ew OO in Montgomery and has ART-13 installed in new car. DYM got his Class A ticket and promptly opened up on 14-Mc. 'phone with 500 watts. NQK and DEE still are going strong on 28 Ma. MEP, GBP. and PSS are
mobile members of the Anniston AEC net. LDX, EW, HVY. CNQ, and YE are active 28-Mc. mobile stations in Montgomery. BCU has finished building his TV set and is returning to 4 Me. AUP works 160-meter 'phone until sundown each day. 1QN and MFA finally are- getting out of
town on 4-Mc. mobile. New EC appointees are wanted in Alabama! Send your request directly to your SCM who will forward it to your new SEC for action. Traffic: W4GJW 74. JYB 38. MAK 21, LEN 19.
EASTERN FLORIDA-- SCM, John W. Hollister, W4FWZ... Field Day reports were slim. Miami, West Palm Beach, and New Port. Richey reported. NFY and the AEC group at Miami ran up 1100 points in two hours of operation. At West Palm Beach there were MVJ, JQ, TH.
BHN, IUJ, LXY, and OBW and it was so good the local Red Cross ordered exact crystals for 7 mobile rigs. KJ sent in a news clipping on Field Day. Traffic nets can use more c.w. members and speed is no requirement. Operators are needed for Jacksonville, Orlando, St. Petersburg, all east coast towns, and central B'lorida. Everyone is welcome. Make it as often as possible. Time: 7:30 p.m. Mon.-Fri. on 3675 kc. Listen for "CQ Palmetto." Why not exchange greetings by amateur radiogram? Get in the net. The 'phone net on 3940 kc. at 7 a.m. needs more coverage but is doing a
good job. Clearwater: AYX is building low-power rig for 160 meters. Holly Bill: OAV plans on going to KL7 QTH
with CAA. Lakeland: NAK rebuilt his 28-Mc. rig, has more power on 3.85 Me., and is working on 144-Mc. rig. He has an RME VHF receiver. Miami: GHP reports all traffic handled by 'phone patch. ILE is building bandswitching into rig consisting of VFO, 6L6, 6L6; 2 807s in parallel, 100 watts; folded dipoles for 10-11, 15, 20, 40, and 80; and is "all set for contests." New Port Richey: KJ reports that Edwin J. Ruth, ex-8CCW, of Tarpon Springs, died of a heart attack Oct. 13th. Tampa: AXY has 3H-kw. a.c. unit and ?i-kw. a.c. unit for emergency work. Doc says the new 10-20 rig has all ideas incorporated to get rid of TVI. West Palm Beach: PVZ is a new YL in Lake Worth. OBW has VFO for mobile. MVJ has 80 and 40 dipoles fed with RG8U and ground plane on 28 Me. Traffic: W4IQV 117, MVJ 108, GZV 100. RP 56. OAV 39, GHP 31, LMG 26, KJ 25, NAK 9, DES 8, FWZ 3, ILE 3.
WESTERN FLORIDA --SCM, S. M. Douglas, jr.. W4ACB -- We still would like to hear from the gang in Panama City, Blountstown, Perry, Madison, and others.
(Continued on page 94)
90
NEW
1950 EDITION
The Radio Amateur
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The Battery VoltOhmyst may be used for accurate measurements of a-c and d-c voltage, for d-c current and for resistance. It may be used for measuring AVC, AFC and FM discriminator voltages; d-c supply and bias cell voltages; oscillator strength; and resistance of coils, resistors, and insulation. This VoltOhmyst is quite helpful for measuring the d-c voltage developed across the picture channel of a television receiver when making antenna adjustments. It also is applied to determining when gassy tubes are present. D-C measurements may be made when a-c is present.
D-C Voltmeter: Six Ranges.......................... . 0-3,0-10,0-30,0-100,0-300,0-1000 volts Input Resistance....................................11 megohms constant for all ranges Sensitivity (max.)....................................3.7 megohms per volt on 3-volt range
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Available only in United Stales and Possessions
THE AMERICAN RADIO RELAY LEAGUE West Hartford, Connecticut
94
(Continued from page 90)
How about it, gang? LDT and ACB visited Pensy and had an FB time seeing the gang. MS is sporting AF4MS call since joining the MARS. Dits and dahs are flying thick and fast in Pensy now that it is in the Class B zone. OCL had a
nice QSO with 1AM0 and 1QCS. AMO and OCL were both mobile in motion and QCS fixed, all on 28-Mc. phone. PTK is the latest call in Pensy and he's knocking holes in 7 Me. NJB is getting 50-Mc. rig ready. NN had a tree-cutting party recently at his QTH. NFN is the proud papa of a jr. YL. Congratulations! OKD is getting primed for CAA radar work. TL and QB were SS rivals. DAO has moved
back to his old QTH in the city. ACB has gone back to work for the City of Tallahassee. Let's have some more reports, fellows. Traffic: W40KD 185, AXP 53.
GEORGIA -- SCM, Clay Griffin, W4DXI -- Georgia lost one of its well-known hams with the death of BTI in
October. Lynne will be greatly missed by all of us on the 75-meter 'phone band. The Georgia-South, Carolina Net meets at 7:15 and 9:30 on week nights. AU interested c.w. hams are urged to call in. The frequency is 3525 kc. The Georgia Slow Speed Net stiU is going strong on 3582 kc. and will welcome new members. Valdosta: BQT is back on
7 Me. APS has increased his power on 14 Me. KGI has
150 watts on 3.5 Me. An amateur radio booth was set up at a local fair. NZX, of Macon, is a 14-year-old YL operator with a Class A license. She is the daughter of ILZ. BQU has
no antenna for low frequencies, but has been on the high fre quencies GGD has been handling traffic and is rebuilding.
AD had an appendectomy at Port Royal, Va., on his way
home. MA has been trying 28 Me. FKE has had power supply trouble. BPT is getting back on. BlWhas had good success with a new 28-Mc. beam. BIN joined WCON, making a total of five hams working for that station. KV should be back on soon with a new rig. Traffic: W4BVK 52, BOL 36, KGI 23, GGD 20, DXI 6, BIW 3.
WEST INDIES - SCM, Everett Mayer, KP4KD -- DJ. the EC, and HZ, Asst. EC, keep 3.5-Mc. c.w. and 28Mc. phone nets going strong. JE graduates to 50 watts after working 48 countries with 6 watts. FN made his 100th contact with W10KH. Fourteen AEC members participated in the Simulated Emergency Test and AEC net participa tion is on the upward trend. DJ's schedule with W2BYF on 3710 kc. stiU is hitting on aU 8. W40LC visited his OM, KD, and friends. W2CKI, HZ's sister, received her license while visiting P.R. IN visited Kansas City and AZ is on a 2-months vacation. The Roosevelt Roads gang is active as is the Ramey gang, headed by IT. W2DD and W6AWA are in P.R. with the Duffy's Tavern crew. ID is overhauling the big rig in preparation for working aU bands, c.w./'phone. .ITT is on with QRP and getting out. CH is with WIBS and WITA with Dtf and AU for bosses. Traffic: KP4DJ 34, KD
5, KO 3. CANAL ZONE -- SCM, Everett R. Kimmel, KZ5AW
-- PA. new RM, is polishing up procedure and teaching new QN signals to Crossroads Net members each Tuesday at 2100 on 7150 kc. AW, BL, CO, DE, DR, GD, and WJ have discovered that net procedure and problems can be very interesting. It's a slow-speed net. The welcome sign hangs out every Tuesday at 2100. WJ and RM qualified for OO, Class I, 'with GD now giving the section three frequency experts available for VFO and crystal checks. WJ has been
appointed OBS, Pacific-side, with 7- and 28-Me. schedules. GM adds Gamboa to the roll of towns checking into Monday night AEC drills. GM and PC acquired Collins VFOs. CP
and IP are DXCC. AW, GM, PA, PC, and WJ, plus two hams-to-be, came home from a week end of Perles Island fishing loaded with 300 lbs. of shrimp, a refrigerator full of fish, and a water-stained copy of QST. Traffic: KZ5FL 54,
PA 38.
SOUTHWESTERN DIVISION
T OS ANGELES -- SCM, Vincent J. Haggerty, W6I0X LJ -- /lust. SCMs, William J. Schuch, 6CMN, and Irvin O.
Hege, 6FYW. SEC: ESR. Speaking at the November meet ing of the Long Beach Club was EUV, an attorney, who addressed the members on the legal aspects of amateur radio. The Activity Committee of the Long Beach Club stirred up member interest in the ARRL Sweepstakes Con test. At meetings of the Pasadena Short Wave Club a tech nical symposium is held in which written questions of, a technical nature are submitted to a panel of experts for dis cussion. 7MZC/6 is stationed at March Field and is inter ested in v.h.f. work. ZUX worked HU2OT on 50 Me. on Oct. 16th. HJL is trying for WAS and lacks 7 states. FYW is active in new CARS set-up and wants former AARS members in Southern California to contact him. OLO worked LU9MA on Oct. 29th on 50 Mo. AM got in some traffic work by relaying Simulated Emergency traffic direct to W1AW. BHG decries a seeming dearth of aetive stations on 144 Me. JQB is getting in more time in traffic work. CMN plans to organize a slow-speed net. CE, YLZ, and DDE made the BPL. The National Traffic System is developing nicely with a good number of stations in the section partici pating. UXN has a new mobile receiver set-up and p.p. 4-65s mobile on 50 and 28 Me. The VHF Net has changed its meeting to 8 p.m. Thursdays on 147.5 Me. All interested in rag-chewing are invited. WKO is Net Control. Phone
(Continued on page 96)
Today the eathode ray tube can be the crystal ball that forecasts your future. Is the picture clear and bright -- or is it fuzzy and out of focus?
Are you going to learn now how to install and
service all types of TV and FM receivers? There can be no doubt that TV is the important field for greater earnings: 83 stations on the air (many more authorized); two million new sets in 1949:
twelve million predicted by 1953; practically every area in the nation soon to be in range of a TV station. Technicians with specialized TV-FM training will inevitably have the inside track installing and maintaining all these sets.
CREI offers just the specialized training you need. It's a streamlined course for the top third of the men in the field -- thorough and complete. It gives practical answers to the technical problems you run into while servicing today's intricate
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Start your training now and apply your knowl edge immediately. The profitable work, passed up yesterday because it was over your head, can be yours tomorrow. Make this year the turning point in your TV career! Write today for complete FREE information. The cost is popular, the terms easy.
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633 WALNUT STREET · CINCINNATI 2, OHIO
96
Activities Manager MVK reports 420-Mc. enthusiasts may
look for contacts at 9 p.m. every night with FIX, CFL, VIX,
NLZ. IFE, WWP, VNL, and KKG active. WUQ/6 is lo cated on San Vicente Island with 90 watts to a 64-element beam on 144 Me. ESR plans a Millen 6/2 transmitter and sixteen-element beam rotated with a TV rotator. PYN switches from 7 Me. to 3.85 Me. EAN is on 3.85 Me. BBY is the new secretary of the Two Meters and Down Club. CQJ has a new HT-19 and NC-173 with a dose-spaced beam on 28 Me. DEB has a 522 on 28 Me. ZUX is on 50 Me. with 75 watts into an eight-element beam. DAY gave a novel antenna discourse at a recent Metropolitan Radio Club meeting. A bazaar by the Two Meters and Down Club attracted 15 XYLs and YLs. MVK's XYL baked the cakes. ESR walked off with the door prize -- won it, that is. Pro ceeds of the cake sale augmented the club treasury. VHF please note: The Two Meters and Down Club voted unani mously to go to horizontal polarization by December 1st with the idea of improving DX contacts with stations in the
East. Traffic: W6CE 2300. IOX 381, YLZ 306, DDE 273, JOB 169, CMN 125, RXT 85, BHG 68, AM 56, TFC 42, QAE 22, MU 16, FY W 13, KSX 7, FMG 3, YSK 2, WMQ1.
ARIZONA --SCM, Gladden C. Elliott, W7MLL -- The Saguaro Club in Phoenix did a fine job of ham opera tion at the Arizona State Fair. The Radio Clubs of Tucson Junior High Schools deserve great credit for their operation of the Pima County Fair, with NPL as operator. The Governor's Aviation Committee and Weather Bureau re
quests amateur radio service for weather reports throughout Arizona. Drop me a card offering your services. New ap
pointments: OPS -- MOW, MID, KWB, KYN, and MJN. ORS -- MID. OO -- MAL and LBN. 9YSY/7 is on 28 Me. at Sunnyslope. MUC, Maricopa, is working Phoenix sta tions on 28 Me. over South Mountain and Globe line of sight, NWA is a new Phoenix call and is on 28 Me. UPR and PEY, in Tucson, and KAD and PBD, in Douglas, held a 28-Mc. round-table. FGG reports HC20T on 50 Me. RJN, at Casa Grande, is working LFX, in Tucson, on 144 Me. PEY worked 0H20K, SV0WI, and F9QU/FM8 on 28-Mc. 'phone. BVZ gets the first postwar Worked All Arizona by presenting a QSL from each Arizona County. Meet the Arizona gang on 3515 and 3865 kc. nightly and 7200 at 10 A.M. Sundays. EAW is back on the air, UDI is handling Arizona traffic with western nets.
SAN DIEGO -- SCM, Dale 8. Bose, W6BW0 -- YXE, the new SEC, reports a rather poor turnout for the Simu lated Emergency Test, but he is taking steps to remedy this situation. Also he took the Class A exam and expects to
be all set for operation on the Class A 'phone bands soon. FMZ is running an 814 at about 150 watts and took in the last CD Party. ELQ turned in the best traffic total for the month. FTY, age 14, has his 25-w.p.m. Code Proficiency certificate. GQQ has applied for EC membership. BGF has had to resign as RM because of lack of time for ham activi ties. YYN has applied for ORS and OO appointments and says that YYM, his XYL, would like the same. KW mailed out a report on the directors' meeting of Oct. 8th and of the FCC hearing on Oct. 10th to the hams in the San Diego section. The Orange County Club is trying to find ways and means to increase attendance at its meetings. Traffic: W6ELQ 61, FMZ 47, BAM 30, YXE 7.
WEST GULF DIVISION
IVTORTHERN TEXAS -- SCM, Joe G. Buch, W5CDU -- 1N IRZ has taken over the NCS assignment for the North
east Texas EC 'phdne net. Wilbur is most capable of carry
ing on with NTaE. We wish to thank CJJ for his interest
and service to NTXE since its inception. Following the sug gestion of our SEC, AAO, the three EC nets now operate on channels ten kcs. apart; NTXC is 3930, NTXE on 3940, and NTXW on 3950 kc. In addition, the SEC and NCS meet on 3960 kc. fifteen minutes before scheduled drill time to discuss net operation problems. The new National Traffic Plan is working very well and is a real help in traffic net operations. 4NNJ and 4LNN are doing fine as NCS for RN5, our regional terminus. BKH promises more activity since the nights are getting longer and the grass is getting shorter. For the 'phone operator who wants a bit of c.w. practice, BKH suggests you meet with him at 0730 on 3930 kc. by reporting into the EC c.w. net. BKS, of Fort Worth, is ex2SKT and is active on 3.85-Mc. 'phone. As a result of having someone else dig the holes BTU now has a couple of fifty-ft. poles for antenna support. LGY and her mother visited ATG. Helen reports Ed has a new rack and panel job. The Big Spring Club now has two transmitters operating for club
and emergency work. Three fifty-ft. poles furnish the an tenna supports. KUC is working lots of 14-Mc. DX. GZU makes BPL for the ninth consecutive month. Traffic: W5GZU 720, L8N 406, CDU 121, ARK 96, PXR 26, BKH 22, AW 19, AWT 10.
OKLAHOMA -- SCM, Frank E. Fisher, W5AHT/AST - SEC: AGM. RM: MBV. PAM: ATJ. PNG has new SX43 and 50-Mc. beam. JP is trying to put six 304TLs in one new rig. BLW has new mobile rig on 28 Me. OWG now is Class A and has a kw. on 14-Mc. 'phone. EGR is building a 10- and 20-meter beam. New officers of Enid ARC are KWE, pres.; LHZ, vice-pres.; OQF, secy.; and Malvin
(Continued on page &8)
hallierafters SX-71
Ready Now! A New Type of Receiver Designed
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Hallierafters SX-71 Receiver, Complete with
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97
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The typical reaction of'h* am ops, upon hearing code from the Mon-Key, has been, *U sure got a FB fist, OM\ or 'UR Mon-Key sounds like a tape. When I can scrape up 30 bucks. I'm gonna get me one? I have had very good luck with the key, and I am sure that they wall become popular among good operators all over the country?'
F. L Hammer, New Haven, Connecticut
"You may be interested to know about my success with the Mon-Key. Have been a marine operator for some time, going through life with a second class license. However, 1 recently got up enough ambition to go to New York and try for my first class license and in running through the 25 word per minute code tests 1 used my Mon-Key and ran through the tests with no slip-ups at all. This was the first Mon-Key that F.C.C. examiners had had up there and they were much interested in it."
W, C. Downes, W3UVD, Jeannette, Pennsylvania
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Langford, asst. secy. LHZ took part in Frequency Measur ing Test with homemade gear with an error of 1 p.p.m. HXT has 304TL perking. EHC has new modulation trans former for his 813 rig. NHD received OES appointment. AHT is back on the air on 3.5 Me. The Lawton-Ft. Sill ARC is sponsoring two contests. A prize of a microphone or bug is offered for the first WAS. A contest for SWLs offers an expense-paid trip to the examination point for ham license to the first station hearing all states. QSLs are required. Participation in either contest is limited to club members and the contests run until someone wins. KVF has a new beam. FWX reports trouble with rotating folded dipole. A mobile net has been formed in Lawton; frequency is 29.600 Me. A slow-speed section of OLZ has been established, meeting at 2000 Mon., Wed., and Fri., and operating at 15 w.p.m. or less. The National Traffic System is working fine but more relay operators are needed on OLZ. If your com munity does not have an active EC, contact AGM. Traffic: K5NRJ 516, W50WV 307, MBV 230. NMM 145. FOM 133, OYP 43, AHT 36, GVS 34, ADC 12, EHC 7,
SOUTHERN TEXAS --SCM, Ammon 0. Young, W5BDI -- MDZ and JIY are on 28 and 144 Mc. EAL is in the CERN 144-Mc. net. IZB is on 28-Mc. mobile. EIB is back on with Signal Shifter while rebuilding the final. GRA has new ham shack and is now VFO on 14-Mc. 'phone. IHD is on 14-Mc. c.w. with 150 watts to an 814. IGS Is mobile on 3.85, 28. and 144 Mc. OQF is on 7- and 14-Mc. c.w. NIT is putting the finishing touches on asuper modulation rig which will have 807s in the final. EEX is back on 7 Mc. A5LSE is building 800-watt rig for MARS Net. OUG is experimenting with 144-Mc. high gain low-noise r.f. amplifiers. ADZ is building a three-element beam. KFY_ is building a new twelve-element beam for 144. Me. ON is coming up with a new beam for 144 Me. MN schedules 4PL in the a.m. on 7 Me. NIY was in the CD Party. JKB has been working DX on 28-Mc. 'phone. PKX and NZH helped KSW put up his 14-Mc. beam. MWN is mobile on 3.85, 28, and 144 Me. LGG spends most of his operating time in ragchewing. OQI now is a Class A operator. Traffic: W5MN 209, LGG 2.
NEW MEXICO -- SCM, Lawrence R. Walsh, W5SMA -- Los Alamos Radio Club's new officers are NJR, pres.; PGY, act, mgr.; MYO, secy.-treas. New officers of the Sandia Radio Club are ODQ, pres.; NRP, vice-pres.; PTF, secy.; PQW, treas. HSO worked MOX on 28-Mc. ground wave. Ted has 80 countries confirmed on 28-Mc. 'phone. NXE is manager of the 11th Regional Net (3540 kc.). MYA has his kw. with 813s about ready to go. AHB has joined the Navy. MSG, Class I OO, averaged 31.5 parts per million error in the last F.M.T. NJR has been appointed OPS. MYQ is an OES. BYX recently was appointed OPS. JYW now is located at Deming. NZ V plans to install a small rig in his car for 3.85-Mc. 'phone mobile work. MUY, MMX, PSP, and PUZ are active from Artesia. The Artesia gang is interested in organizing a slow-speed net (Pecos Valley Net) on 7 Mc. QPF and QPD are new Los Alamos calls. 3RHU/5 and 5PZT recently joined the Los Alamos Club. 5FAG has a twelve-element beam on 144 Me. Hub transmits and listens every Monday at 8:00 p.m. until 8:30 with beam pointed north and from 8:30 p.m. to 9:00 p.m. with beam pointed south. Traffic: W5ZU 160, NXE 102, IGO 74, OCK 64, A5ZU 44, W5NRK 39, NJR 31, A5OCK 26.
CANADA
MARITIME DIVISION
Maritime -- scm, A. m. croweu, veidq -- sec: FQ. QG, with ZW and WQ, is taking a commercial course at St. Voc. School. QG is using 5 watts on 3.5-Mc. c.w. WG and UU are on 3.8 and 14 Mc. HW also is on 14Mc. 'phone. ES is on 28-Mc. 'phone and has had some nice work with " hi-fi " phono reproduction. If you hear VE2PX, ex-HK, give him a call. During a recent power shut-off BB, FL, CX, and HB were in QSO, and when the power was cut HB immediately switched over to his emergency selfpowered rig ana carried on. GC and OE have been quite busy working on their respective homes. FQ spent his va cation working DX and taking a nice motor trip through New Brunswick delivering QSLs to the VE1 boys. Some service -- a QSL Manager who delivers 'em personally! TA says he'd like to see a really simple article on single-sideband for 28 Mc. LY has been working plenty of good DX with the new 28-Mc. beam. LZ recently returned from a trip to St. John and we hear he's now the owner of an ART-13 trans mitter with all of its fancy wheels and gadgets. FQ and DQ recently had a nice chat via 14 Me. with VE5AJ, ex-lEO. Traffic: VE1MK 28, FQ 8, QG 7.
ONTARIO DIVISION
ONTARIO --SCM, Thomas Hunter, jr,, VE3CP -- Asst. SCM c.w., M. J. McMonagle, 3AWJ. Asst. SCM 'phone, E. B. Kimble, 3FQ. SEC: KM. RMs: ATR, AWE, AWJ, BMG, BUR, DU, GL TM, WK. PAMs: Fp, DF, RG. BUR again leads in traffic. New appointments include IL as OPS apd BUG as ORS. IA now is a member of the A-l Club. YJ and IL are mobile ©n 3.85 Me. A tower-raising bee at AAF's turned out to be a small hamfest. BYF is a member
(Continued on page 100)
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PERSONAL ATTENTION: The Butler store is run by Bob Henry, WpARA, and the Los Angeles store by Ted Henry, W6U0U. We make the deals ourselves. We finance the time payments ourselves. That way we have the lowest overhead and can do more for you. That's why YOU AND I CAN DO BUSINESS. Write, phone, or visit either store.
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W^ARA
HENRY RADIO STORES Butter< Missouri
II240 Olympic Blvd. LOS ANGELES 2S
CALIF.
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99
Telex Headsets
Keep QSO's Qs
Telex Headsets are easy on the ears! No pressure whatsoever, background noise blocked out. They clip sharply at 3000 cps adding another Q5'er to your receiving setup. Mighty relaxin' for hours of traffic, DX, or just plain rag chewing. The Twinset weighs only 1.6 ounces, the Monoset. 1.3 ounces. Writeforfree folder on both headsets today ... or see your Parts Jobber.
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of A FARS for West Toronto. BYB is having trouble with his frequency meter. GN has bGkw. and schedules GG. ZE is working hard on the XTAL. The gang in Toronto, and especially IL. really put on a tine display for the Red Cross during the last emergency tests. BOW .and AQG worked W9TKL on 144 Mo. KM is trying his luck on 28 Me. when not on 3.8 and 50 Me. BNQ works Gs with 10 watts mobile. BPE increased power with p.p. 811s. ALU runs code prac tice on 7050 kc. daily at 6:45 p.m. API is on from new loca tion with higher power. DEI is a newcomer to Kirkland Lake. KM spoke to the Windsor gang on emergency work. WA has left us for the U. S. The Kirkland Lake gang, under BHU, did a fine job in the last Simulated Emergency Test. DDU (30CP) is new in Camp Borden. VD is one of the few old-timers still reporting. Macmaster University has formed a ham club under AFARS. GG replaces ADR as SC for AFARS. PH is un 50 Mc. BQL has transferred to the Signal Corps. BL is a member of RCC. While operating mobile in Windsor, HI found out whv the gang in Windsor gets out so well. Traffic: VE3BUR 238, WY 158, IA 131. BQL 108, ATR 76, IL 72. NI 68. BL 66, CP 58, WK 52. APS 41, BMG 39, BTQ 32, SM 31. AG 28, RG 28, BUG 23. DF 23. BBM 21. DH 21, GI 20, AQB 19, BSA 17. BVR 16, KM 15, HK 14. FQ 13. YH 13. BER 12. PH 10. YJ 10, VD 6, DDM 5. DD 4, ADN 2.
QUEBEC DIVISION
OUEBEC SCM, Gordon A. Lynn, VE2GL- CG has completed a summer on board ship and now is located * in Montreal looking for a place to hang lus sky wire. DD
is using supermodulation on 14 Me. and LP has 813 with supermodulation on 3.5 Me. Both like it extremely well and report excellent results. KG has schedule with KH6UG on 28 Me. «-very Saturday and Sunday. AJA, with 6L6 into 807 final with folded dipole and 1IQ-129X, is new in St. Lambert, He is an ex-G. AAK, of Pt. St. Charles, is new on PQN. GM is on PQN. TRN, and EAN, and handles lot of traffic. XB has changed QTH to Lachinr and is now located directly above BB. XR, AEG, and GE are helping with a rig for a blind newcomer ham and DU located a receiver for him and is assisting with code. EC reports the Quebec 'Phone Net is active with VE, AHK, AHN, RM, AIM, AT, ZG, and ABB. QJ is new president of St. Maurice Valley Amateur Radio Association. AHK has announced the arrival of his first harmonic. ABJ has miniature radio-con trolled car, operated on 28 Me. The Quebec Club sponsored its annual oyster hamfest on Oct. 22nd and as usual a large crowd of hams and friends attended. PQN is away to a fine start and now that Daylight Saving Time is over GM is looking for better representation. Drop in on the net on 3570 kc, at 7 and 10 p.m. nightly and the QEN on the same frequency at 10:30 a.m. Sunday. Traffic: VE2GM 157, XR .123, BB 56. CD 56, EC 50, 1G 20, AXE 6.
VANALTA DIVISION
A LBERTA --SCM, Sydney T. Jones, VE6MJ -- SEC: XX MJ. OP is busy on 3.5-Mc. c.w. P.B. is rebuilding. IK spurts new' homebrew `scope. NA finally chased the mice out of the SX-25. J J works out well on 14-Mc. 'phone. QF and KC are combining efforts on a new rig. OD is new PAM for Alberta. NA and MJ are appointed Class HI Observers. MA claims he has a sad case of BUI. PV and VJ are busy build
ing new QTH. EO is kept very busy ironing bugs out of the city police f.m. rig. OF works the 14-Mc. band. JJ works out well on 14-Mc. 'phone. MB has been appointed OBS and EC for the Coronation area. TH puts out an FB signal on 3.8-Mc. 'phone. EA is building 50-Mc. exciter. A volunteer is needed for Route Manager appointment. He should be a good c.w. man. If interested, contact your SCM. CE and his XYL are visitors to Red Deer. IY is heard regularly on the Alberta 'phone net. TK and the Calgary gang did a marvelous job in the Simulated Emergency Test Oct. 16th. HQ renewed membership in the ARRL. Pleased to have you with us. Bill. AO received DXCC certificate. How do vou do it, George? Traffic: VE6NA 174. MJ 15, NB 3.
BRITISH COLUMBIA -- SCM, Ernest Savage, VE7FB -- Vancouver ARC held very successful Simulated Emer gency Tests, Saturday and Sunday, Oct. 15 and 16. Oper ating solely from battery power on 3.5-, 14-, and 7-Mc. 'phone and c.w., MC received a small citation from the R.I.; no carrier shift indicator. DB has ten watts 'phone and is waiting for the money to pile up to buy new' modulation transformer. Capt. AEY is on 14- and 28-Mc. `phone and is shaping up a nice beam for 14 Me. ADZ has a new' jr. operator. While his wife was in the hospital he scored ten new countries on 28 Me. A HQ at last made WAC in only four years on 28 Me. AL made WAC in-one month with no transmitter on and all were on 14-Mc. c.w. Somebody didn't get any QSLs. AIE is DXing on 3.5-Mc. c.w. AOQ has moved to a new QTH and the power company moved its 60,000 volts across the front of his new place just to annoy him. ALJ is all set now with VFO and 28-Mc. beam and cold nights vs DX. CN broke his leg and tells us he was reaching into the truck and not for what we think. He even tried to convince the doctor, XU, who set the leg. AKG is back in Sherman after being 28-Mc. mobile in VE6 Land for two years. Traffic: VE7TF 131, BJ 82, AC 6, FB 4.
(Continued on page 102)
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101
RADAR,
COMMUNICATIONS
and
SONAR
TECHNICIANS
WANTED
For Overseas Assignments
Technical Qualifications: 1. At least 3 years' practical experience
in installation and maintenance. 2. Navy veterans ETM 1 /c or higher. 3. Army veterans TECH /SGT or higher.
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vestigation. 4. Willing to go overseas for 1 year.
PRAIRIE DIVISION
A MANITOBA -- SCM, A. W. Morley, VE4AM --The 1VX Manitoba 'phone net is going great guns on 3805 kc.
with 18 stations reporting in. DQ, wno is the farthest north station in the section, is the newest member. WF is in new QTH at The Pas. AR was in Winnipeg and is winding coils for 28 Mc. LF paid him a return visit. IF renewed his OBS appointment and DN his OPS appointment. DJ is on 3.8 Me. from Shilo. AE has new compact job on 28 Me. Ex-DP, now in VE7 Land, is celebrating the addition of a jr. opera tor. LC, the QSL Manager, reports again that there are hundreds of cards in the Bureau, I want to thank the fellow using my call for a WAC. Bootlegging has reached a new high in tnis section. LC, RP, and AM have all been used. DF has changed his preamplifier on the 28-Mc. 'phone job. EH is playing with motor-coats. AD has the 3.8-Mc. bug. JE is running a schedule with his son in Vancouver. Congrats to QG on the addition of a jr. operator, DO has new n.f.m. job on 14 Me. FA is heard on 3.8 Mc. 3AFH was in Winni peg. JM has n.f.m. rig on 28 Me. Once again it's my pleasure to wish you all the best of Season's Greetings. Let's hear from you this year. Traffic: VE4AM 40.
SASKATCHEWAN -- SCM, J. H. Goodridge, VE5DW
-- JI works Southern U. S. A. on 160 meters. BH has ORS appointment and is alternate on TLI. HR reports TLI is domg fair for a start despite Aurora, and that he had a fair score in the CD Party. CE and OM checked over their 28Mc. beams ready for winter operation. WK, ex-IRM, 4VG, is a new call in Regina on 14-Mc. c.w. The University Club has doubled its membership since last year and is working on additional equipment. QZ, now at Dafoe, visited Saska toon. EE, JF, CJ, and NC attempt Sunday morning sched ule on 50 Mc. UQ has 16 watts to 12-foot whip. CM worked W0s on 440 Me. during Aurora activity. AW sold his re ceiver for carpentry tools. MA has consistent 3.8-Mc. signal with supermodulation. At recent club meetings officers were elected as follows: Regina: WL, pres.: LJ, vice-pres.; JW, secy.-treas. Saskatoon: DR, pres.; GR, vice-pres.; OB, secy.-treas. University Club: MV, pres.; Jack Jannon, secy.treas. Prince Albert: PA, pres.; CE, 1st vice-pres.; VB, 2nd vice-pres.; Bob Paul, secy.-treas. Club meetings are held each month, at Regina the 1st Monday, at Prince Albert the 1st Wednesday, at Saskatoon the 2nd Friday. Traffic: VE5HB. 30, BH là.
Base pay, bonus, living allowance, vaca tion add up to $7,000.00 per year. Per manent connection with company possible.
Apply by Writing to C-3, P.O. Box 3552 Philadelphia 22, Pa.
Men qualified in RADAR, COMMUNICA TIONS or SONAR give complete history. Interview will be arranged for successful applicants.
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102
The Evaluation Committee of the American Library Association recently picked QST as one of 97 magazines meriting honorable mention in a competition in which 5917 publications were considered. QST was described as a "veritable textbook, containing a wealth of data" and was further complimented by the statement that "QST contains the most accurate, concise and dependable material in its field and enjoys a wellearned reputation." This is the second time QST has been so honored in the Association's survey.
The Radioclub Hispanoamericano has been or ganized in New York City to foster the study and use of the Spanish language by amateurs in English-speaking and other non-Spanish coun tries. Member stations use the special calls " CQ Spanish-American Friendship" or "CQ Amistad Hispanoamericana," meaning welcome to any station wishing to learn Spanish. The club's services include a free Spanish-English and English-Spanish dictionary of terminology gener ally used in 'phone QSOs with amateurs in Spain and Latin-American countries. Membership is open to any genuinely interested amateur. Ad dress all inquiries to Radioclub Hispanoamericano, c/o W2TWR, 63 West 102nd Street, New York 25, N. Y., U. S. A.
Recommended reading: Coronet for October, 1949, contains a heart-warming article on ham radio entitled "Nobody Has To Be Lonely." Will Oursler is the author.
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Net
m. t&e ain.
Paul Stumpf, W3AQN, York, Pa., says:
"Before I installed the Tl --52, Channel 2 would black out on all TV sets. Now I can operate 10 meters any time I want. It helps the other channels, t*oo.
The Drake Low Pass Filter is an M-denved double sec tion filter with output and input circuits shielded. In stalled in the transmission line of your transmitter, 30 MC and lower, the filter attenuates all antenna and feed system harmonic radiation above 40 MC with no re duction in signal strength at your fundamental frequency. Handles 1 KW on reasonably flat lines. No adjustment required. Once installed it is forgotten and you can QSY and move from band to band at will.
*7M tpwt
Drake High Pass Filter
Installed in the antenna input to a TV receiver this filter suppresses interference (50 me and lower), from amateur transmitters and many other sources, entering the set thru the antenna system. Two types available--TV--300 for
$5-95 list 300-ohm Twin Lead and TV-72
for small 72-ohm coax. Either type -
All Drake filters are completely factory assembled and laboratory adjusted for maximum attenuation.
Drake Filters at your distributor or write us for de tails. $ $ $ $
The R. L. Drake Co.
ì I Longworth St. Dayton 2, Ohio.
Founded in 1909
RADIO TELEPHONY RADIO TELEGRAPHY
Courses ranging in length from 7 to 12 months. Dormitory room and board on campus for $40.00 a month. The college owns KPAC, 5 KW broadcast station with studios located on campus. New students accepted monthly. If interested in radio training necessary to pass E.C.C. examinations for first-class telephone and second-class telegraph licenses, write for details.
PORT ARTHUR COLLEGE POR^TSHUR
Approved for G. I. training
104
Filter for Harmonic Suppression
(Continued from page 14)
is greater thaï) 1'250 watts, amplitude-modulated. Insertion of the filter does not upset the standing wave ratio in a moderately flat line. If the s.w.r. is greater than 2 to 1, the power-handling capa bility is reduced correspondingly.
Cost
The total cost of the filter should be less than $10.00. The copper enclosure and capacitor plates shown in the photograph were made by a com mercial sheet metal shop for $0.00, although some estimates ran as high as $18.00. However, the box may be easily fabricated by anyone with a moderately heavy-duty soldering iron or torch. At, the present time Teflon costs $10.00 per pound and is sold in minimum quantities of one pound, but it is hoped that before long some manufac turer or supply house will stock the material so that amateurs can buy the small quantities needed in filters of this t*ype.
Acknowledgments
Without extremely helpful assistance the de velopment of this filter would have been con siderably more difficult and time consuming. George Caffrey, W'3JOO, and Bill Rubin, W'3MQU, checked the filter computations and assisted with the construction, in addition to run ning laboratory performance cheeks. Both spent many man-hours, with George making all the photographs and Bill many different inductors. To them, the writer extends his most sincere thanks and appreciation.
4 The author has agreed to supply the Teflon precut to size, including sufficient material for the disks, until such time as it is in distribution through regular channels. Ad dress P. O. Box 11, Ivyland, Penna. -- Ed.
Polarization on 144 Me.
(Continued from page 16)
favor of horizontal. Even cross polarization, with the W1HDQ array horizontal, was better than vertical-to-vert ieal. These observations over short, but nonvisual paths are in line with results of similar tests made in the early days of 2-meter operation.2
Commercial tests have purported to show that vertical is superior to horizontal over sea water, but W1PIV and the writer have not found it so. W'lPIV has made numerous tests with W4IKZ and ot hers over a 450-mile hop that is salt water almost every mile of the way. Horizontal has been consistently better, though not by a tre mendous margin. The writer has made tests with W4IKZ on four different evenings, with three of them showing about one S-unit advan tage for horizontal. The fourth? Exactly the same for both, in several checks made in the course of an hour or so of steady but weak signals. This was the same evening that our high-low antenna tests worked out in reverse.
(Continued on page 106)
3 "Need There Be Line of Sight?" QST, March, 1946.
NEW RECEIVERS
NATIONAL
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COMPLETE STOCKS
At Terminal you will al
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HRO-50 complete $349.00
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TRIPLETT Pocket-Sizel 'assseeemibtlset,ersriu fpitpoclwipeedrpcfreomr-m-
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666-R -- Single range selector
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/JOHNSON
------
switch and flush enclosed molded unit construction. AC and DC ranges; 0-10/50/250/1000/5000
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0-10/100/1000 milliamperes at 250 millivolts
sMeengsoithivmitsy,. W Reitshistabnactete: riGes-3Ka/n3d00Kal/l3- _j3r_/|01
<035 I Tubes supplied are 2-5Y3, aaat
` 2-6SJ7, 884, 5BP1 cathode
ray. Shpg. wt, 30 lbs.
VV
7^^
\ / /ATRV10AI0KNwISaNM ttGpIThoTInEe RandKCIW T transmit ter, with finest commercial efficiency and appearancel Supplied with wir ing harness for easy and professional
assembly. Pi-network output stagi matches any antenna. Bandswitchinc from front panel for 160, 80, 40, 20,
purpose 50-inch fest leads. Shpg. 24c
..........................I"
HbtrAaaRnVndsEmYma-iWtstEteLerLrSs|!!
r"''
H E A D S E17
J \
2568 -- Popular high fidelity
Monoset, as illustrated.
Weighs only 1.2 oz. Elimi-
Removable sannaitteasryeaprlapsrteicsseuarretipfsa,tig5ueft,.
cord and phone plug. Specify 2000 or
15, 11 and 10 meters. Tubes required: 4D32, 6AQ5, three 6AU6, two 807 5Y3, two 5R4GY, 6AL5. Complete with all parts, hardware, punched chassis,
handsome cabinet and instructions. Less tubes,
Smail in size, packed with | power and efficiency! 40 to 50 |
128 ohms. Shpg. 11c.
7.29
crystals, key and mike.
watts on all amateur bands
l 3725--New Twinset, weighs only 1.6 Ik or. Matched pair midget phones,
from 3.5 to 148 Me. Built-in coils I ^^comfortable and convenient to
WELLER "SOLD
for easy bond switching. Has
antenna coupler, crystal oscilla
tor--VFO switching, excitation
break-in operation, provision for
control, 100i/o powered rigs. In attractive steel
driving h'gner high x 9Vk" wide x
deep,
cabinet. 13 A tubes, less power supply and crys-
T^^wear. Complete with 5 ft. cord, phone plug. 1000 or 64
Soldering Guns | Just squeeze the trigger switch for fast
-
Shpg. ?3c.8.82^T^
/
and better soldering! Built-in spotlight. Operates on 115 volts, 60 cycles AC.
Shpg. each 30c.
M«<· IEN '
DWS--2S10-02770D0SuiSanilgnlgheleehaetha.eta,tI,01020/1003W05.WW.........
$111321..6.67791
I ·'
CtTaoBlsmS.-p5Ale0.dBted
C>w1W it.0h0onealyc,hbfuotr
shipping. modulator
can
be
added .
$ 87.50
GRID-DIP METER I 90651 -- Compact and coWm-DI-250 Dual heat, 200/250W. 14.65 i pletely self-contained, |
TB5-50C Phone and CW, uses carbon 111.50
TB5-m50icDropPhhoonnee a.n..d high impedance
CW, uses crystal or dynamic microphone
137.50
· supply for 110 V.A.C........ APS-50 Power supply for 6 V.D.C............
39.50 29.75
VPS-50 Power
Cporvoevrissi1o,n5xmtfoe7oa2r'^s7ub0raeMtpseto,oe,wnreluyrynios3fupoWprepnr'l'ayxt,ih3ca%s" lengths on anti-backlash drum dial. Ideal for -
engineers. Complete tubes and inductors.
`°r
J OHMITE "Little Devil"
s
RAYTHEON VOLTAGE
stabilizers
Raytheon voltage
SPECIAL 866 F i I a m e n t*>"
"'^''9 '£n
$K$. 00QrW/i
RESISTOR ASSORTMENT
These handy plastic cabinets con tain 125 resistors in the most often-
used values. Yob pay only for the resistors -- the handsome, valuable
regulators are TRANSFORMER
k
cabinet is free! Ships- 45c.
entirely a^®rnat}^ Fully shielded and designed
CAB-1--VaW selected asst. $12.25
will
hold
fluctuating
input of 95 to 13°,''m constant output of 11»
60 cycles A.C. to a
volts, plus or minus ¥2%.
for continuous heavy duty. 2V2 volts center-tapped sec
ondary (fi< 10 amperes. 10,000
volts insulation. 115 volts
CAB-2-1 W selected asst. 18.37
The G.E. "HARMONIKER" TVI KITS!
· Suppress TVI radiation! Terminal
Model
VR-6110
VR-6111 VR-6112
VR-6110 VR-6H4 VR-6115 VR-6116
Watts
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Shpg. Net
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48.00 75.00 125.00
50/60 cycles
janr
primary. Shpg. 45c.
has complete parts kits for the
G.E. "Harmoniker". · Supplied with coils, condensers,
shielded container, ceramic stand
offs, binding posts and instruc
tions. 9 All condensers rated 1000 volts
DCW
2% accuracy.
BAND WO Ohm Kit 300 Öhm Kit
10 Meters
$3.79
$5.49
20 Meters
$4.29
$6.01
40 Meters
$4.99
$6.11
i'll GUARANTEE -- Every item, re-
Q gardless of its low price, is
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80 M __e_t_e_r_s
$5.99
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Add 30c each kit for shipping
fully guaranteed by TERMINAL.
85 CORTLANDT STREET
MAIL ORDERS--If unable to visit
NEW YORK 7, N. Y. -- Phone: WOrth 4 3311
our store, send us your mail orders. Please remit in full all orders under $5.00. 25% deposit for COD's. Prices
are FOB New York.
Horizontal had the edge in several checks with
W2WFB, but Walt's flop-over system obviously
gave horizontal the benefit of the doubt, since it
was stacked four high in that position. The tests
with the South Jersey W2s were inconclusive, if
Illustrated is the husky JOHNSON 1Roto Matic rotator, ideal for chasing DX.
i Heavy steel gears, truly weatherproof construction and positive lubrication make
one considers only the S-meter readings. The signals did seem to have the edge in readability on horizontal, however.
And how about the best DX of all, the rugged
it a dependable all weather perfornier.
and "impossible" path over the Alleghenies to
Write for catalog 704 describing all RotoMatic components or see your
W8UKS? This one, though hardly conclusive, in view of the excitement attending the opening
JOHNSON jobber.
and the briefness of the test (we didn't want to
be blackballed forever by WIs and W2s who were
waiting for their first crack at Ohio!), stands out
as a refutation of the claim that only horizontal
Features
can make the grade when the going is roughest. With signals just barely readable on our high
horizontal, we switched to the low vertical when
Sam changed, and there he was, still workable.
· Continuous rotation
· Noiseless slip rings · Instantly reversible
motor · Tilt base · Selsyn direction
indication
1200 to 1 gear reduction Positive locking Speed IVz RPM
Safely handles 21/2 KW
Lifetime "oilite'
W1-W8 can be worked with vertical polarization, and don't let anyone tell you different. No flopover comparison was made, as we wanted to free W8UKS as rapidly as possible.
The same has been true of every comparison we've yet made. No matter how weak the signals were on one polarization, they've always come
through on the other. The longer we work with
the flop-over array the more we become con
vinced that the tremendous advantages claimed
by some workers for horizontal are based largely
on fallacious reasoning and inconclusive tests.
It is interesting to note that where small arrays
MM-2 MODULATION
are used the margin between horizontal and vertical is most marked. This is as might be expected, if we stop to think of the effect of adding parasitic elements to a single driven
MONITOR element. Where two stations use large arrays that can be expected to radiate uniformly in
both planes, the margin is very small, indeed,
and this appears to result mainly from the gen
erally-better signal-to-noise ratio when hori
zontal arrays are used, rather than from any
difference in propagation qualities.
To say, as some have, that all of the real DX
has been worked with horizontal is to ignore the
facts. All our v.h.f. records, up to the summer of
1947, were made with vertical antennas, and the
full extent of activity (500 to 650 miles) along
the Atlantic Seaboard has been covered again
and again with vertical systems. Recent exten
ONLY
95
connut wtm tutti lIVtkltHt HMU UUIUHI
iKiminn wihmw
INSTUCtlOH 1001
3" x5"x 10'
AN IDEAL CHRISTMAS GIFT
This basic oscilloscope featuring cali brated modulation percentage scale, linear 60 cy sweep with return trace blanking, trace intensifier window, complete controls, reversible panel, rack mounting provisions and many other outstanding features. See the MM-2 at your dealer or write Dept. 1-9
NOW--ALSO AVAILABLE IN COMPLETE KIT FORM
FOR ONLY $14.95
Send for Descriptive Literature
sions of the record to 660, 800, and now 850 miles, were more the result of good locations, snappy operating, improved equipment and fa vorable conditions, than of antenna polarization.
This is not to argue against horizontal, but merely to plead for open-mindedness in consider
ing the polarization question. Our own experience, covering a period of more than fifteen years, on 56, 50,112,144, 224, 220, and 420 Me., indicates that if ability to work consistently over longer distances were our principal consideration we would do somewhat better by standardizing on
¿^LAMBDA ELECTRONICS CORP. horizontal antenna systems for all v.h.f. work. We doubt, however, that we shall soon see that
BOX No. 55
CORONA, N.Y. standard adopted, for reasons that are beyond the scope of this discussion.
106
Save $ on $un Surplus and Standard $pecial$!
HI-FIDELITY
MUSIC LOVERS
Now tn stock for immediate delivery all the components necessary to assemble the hi-quality-lo-cost radio phono combination as recommended by a well known consumer research organization.
MEISSNER SC FM tuner with cabinet...
$38.33
MEISSNER 8C FM tuner less cabinet,.. ,
34.33
GENERAL ELEC TRIC 1201D. Speaker
17.70
UNIVERSITY 4401 Single Tweeter....
12.00
UNIVERSITY 4402 Dual Tweeter.... .
24.00
UNIVERSITY 4405 Filter Network....
6.00
BELL 2122 Ampli fier .......... .
41.50
BOGEN PH-10 Am plifier...........
29.25
G.E. Preamp, self powered.... .....
9.57
WEBSTER 356-27
Record Changer with GE Cartridges....
39.75
We will do al! the necessary adapta tion so that all you have t® do is plug in and play after installation in your own cabinet. There is no charge for adaptation, except for extra wire, plugs, etc., which amounts to very little. When ordering please include sketch of layout and length of wire needed on each item. Allow one week for adaptation.
PICKERING MAGNETIC PHONO CARTRIDGES FOR THE ULTIMATE IN HI-FIDELITY RECORD REPRODUCTION
S-120 M. Sapphire, Standard Play.......... .$9.90
S-140 S. Sapphire, Long Play. 15.00 D-120 M. Diamond, Standard
Play............ 24.90 D-140 S. Diamond, Long Play .36.00 R-150 Replaceable Stylus
Cartridge less stylus. . 9.90 Standard Play Stylus for R-150.. 2.40
PRESTO -- 15G 3-Speed 12" bal anced turntable and motor, Profes sional quality for home use... $38.00
REK-O-KUT -- LP-743, 3-Speed 12" Balanced Turntable and Motor.$49.50
PARTS ASSORTMENTS
100 Ass't Elec, and Tubular
Cond................... $3.49
100 Ass't Resistors,,, *...... 1.00
100 Ass't Mica Cond., un
marked .....
1.00
25 Ass't Pots. .............. 4.95
100 Octal Wafer Sockets. ...... 2.95
100 Octal Bakelite Sockets... 3.95
PHONO ARMS
American model No. 1-j with CR la 3.5 volt output cartridge. Unboxed. New.................... $1.65 Astatic SL 8 and D 9 with L-26a cartridge. Standard replacement unit. Boxed. New..........._. ..$1.89 Phono arms less cartridge, but with all necessary hardware, straight or curved. Five (5) for........ ^$1.95
HAMS Sun Radio now has for immediate delivery full stocks of all popular ham parts and equipment; such as --NATIONAL, HAMMARLUND, HALLICRAFTERS, RME, BUD, MEISSNER, BARKER AND WIL LIAMSON, HARVEY-WELLS and many others. Write us your re quirements and problems. W3PPQ
and W3MQD AT YOUR SERVICE.
FAMOUS MAKE BUTTERFLY TRANSMITTING CONDENSERS
SPLIT STATOR All New--Boxed--Below Cost
f PVQTAI Q I All crystals have Army MC 1 *»**"**· harmonic ratings but Sun encloses directions for deriving the correct fundamental frequency in kilocycles.
.500 spacing .375 spacing .250 spacing
(Zap
Cap- w . Cap.
per. sec. Price per. sec. Price per. sec. Price
11 MMF $8.35 11 MMF $8.15 13 MMF $7.95
30
11.85 22
9.95 30
9.80
68
17.80 34
11.30 45
11.20
87
20.65 58
1435 95
15,40
96
22.15 70
15.90 1H 16.80
105 23.80 82
17.20 159 21.00
115 25.20 94
18.75
124 26.65 106 20.15
118 21.60
130 23.10
141 24.50
153 25.95
VARIABLE CONDENSERS
-- as used in SCR-522 -- brand new.
2-gang, 220 MMF per section.............
$1.29
3-gang, 220 MMF per section.............
$1.59
JUST
ARRIVED! NEW FREQUENCY CRYSTALS FOR HAM AND GENERAL USE :T-243 Holders, á" pin spacing (Fractions Omitted)
GENERAL USE
6006 6208 7873
6040 6073 6075 6100 6106 6140 6150
6840 6873 6906 6940 6973 7740 7773
7925 7950 7973 7975 8240 8273 8306
6206 7840
49c each
10 for $4.50
HAM USE
2, 6 10, 11. 20. 40 METERS
5305 5675 5677 5700 5706 5725 ST40
5750 5760 5773
5775 5806 5825 5840 5850
5873 5875
5900
5906 5925
5940 5973 5975 6273 6340
6373 6406
6425
6440 6450
6473 6475 6506 6540 6573
6606 6640
6673 6706
6740 6806 7306 7340 7373
7406 7440
7473
7506
7540 7573 7606 7640 7673
7706
8173
8175 8340
each 99c
10 for $9.00
$ 59 VARIABLE CONDENSER. 1-gang,
ca^city 14-600
CRYSTALS WITH A MILLION USES
Fractions Omitted
kc kc kc kc kc kc ke kc kc kc kc ke
TRANSFORMERS
412 422 433 442 462 481 492 503 507 511 516 522 413 423 434 443 468 483 493 504 508 512 518 523
Ham Transformers -- Peerless (Al tec Lansing) new, not surplus, priced below cost. Modulation Trans. -- 20 w. Univer sal No. M-4081Q. List $9^5. Only....... ............. $3.70
414 424 435 444 472 484 494 506 509 515 519 415 425 436 445 473 485 495 416 426 437 446 474 487 496
AO c each 418 427 438 447 475 488 497
419 429 440 448 477 490 498 420 431 441 4SI 479 491 502
Modulation Trans. -- 300 w. Uni versal No. M-2107T. List $70.00. Only................. ...$28.00 Plate Trans. -- 2428 v. CT-300 MA No. P-5196A. List $45.00. Only $18.00 Fil. Trans. -- 2.5 v. CT-20 Amp. 4500 v. ins. No. F-8513J. List $8.00. Only.................. ..$3.20 Driver Trans. -- Universal, 70 MA for 15 w. Audio No, A4237Q. List $10.75. Only.......... . .$4.30 Grid Mod. Trans.-- Kenyon.,. ,99c
MICROPHONES Low imped
ance dynamic for ham or professional use at 60% off list price, brand new American Microphone Co,
Model Impedance Lisi Reduced la
D7T 200 ohm $27.00 $10.80 VR2T 200 ohm 42.15 16.86 D9AT 200 ohm 45,00 18.00 D22OT 200 ohm 71.00 28.40
Xtal. Freq. Stan. 3-prong holder
98.356KC
Easily altered for 100kc Standard. Mounted in low loss 3 prong holder.
$3.89 each
For Crystal Controlled Signal Generators Ft. 241-525Kc
526,388 527,777 529.166 530,555 531.944
533,333 536,111
537,500 538,888
99c each
I.F. Frequency Standards
kc 450
451,388 452.777
kc 461,1H
464,815 465,277
QQ. WC ««CH
200 KC CRYSTALS
% Wit"hx ouW t H'o.E lde«rsh O * 9 aC
3 for $2.00
Assorted Miscellaneous
Crystals
Fractions Omitted
372kc 379kc 384kc 387kc
374
380
386
388
375
381
2Or
376
383
For Ham and General Use
Fractions Omitted
390kc 396kc
391
397
392 400
403ke 404 405
408kc 409 411
377
Each 393 401
METERS
priced at a fraction of the cost of their holders alone. S
402 79c each
WESTON 2", r. 500 micro-amp. with scale for 0-15/600v...... $2.97
Crystals for
CRYSTALS
Crystals from BC 610
TRIPLET, 2" sq. 0-40 v, DC
SCR 522
FOR
Spacing--2 Ba
meter....... ........... 2.97 SUN 2" r. 0-300 v. DC meter,.. 2.97
kc kc
HAM USE
nana Plugs
SIMPSON 2" r, 0-15 v, DC.... 2.97 SIMPSON, Foundation Meter for 1-177 Mutual Conductance Tube Tester, calibrated in Mi crohms, with diagram.......... 3.49 WESTON, 2 range ohmmeter, new with case, 1-10/1000 ohms. . 14.97
5910 6547.9 6370 6610 6450 7350 6470 7480 6497.9 7580 6522.9 7810
7930
$1.29 each
FT-243 Holder W * Spacing
ea. 3735 KC...69C 4190 KC...39« 5030 KC...39«
2045 2105 2125 2145 2155
2220 2258 2260 2282
2305 2320 2360 2390 2415
2435 2442 2532 2545
3202 3550 3215 3570 3237 3580 3250 3945 3322 3955
3510 3995 3520 ¿1 a a
1 `4Y
45 AND 78 RPM ADAPTER for 78
5485 KC...39C 2300 2557
each
RPM record changers and manual
players, converts any 78 RPM record · Payments must accompany order. Enclose 200 for
player to a 3-speed player. Quickly
attached and removed, just slip on
spindle. Only..... .
$13.50
RECORDING MOTOR AND
postage and handling. Minimum order -- $2.00 plus postage. Crystals are shipped packed in cloth bags inasmuch as they are shock mounted. All shipments guaranteed.
TURNTABLE, Professional 33 M and
78 RPM with 16" aluminum alloy
casting table, famous make. Reg.
price $165.45. Brand new; reduced
to.... ...........
$116.00
GONSET, 6 meter converter, easily
TEDjUIC All items F.O.B.. Washington, D. C. All
*
orders $30.00 or less, cash with order. Above
$30.00, 25 per cent with order, balance C.O.D. Foreign
orders cash with orders, plus exchange rate.
converted to 10 meters or use as is on
6, Reg. $39.95; reduced to..... $27,95
POTENTIOMETERS, 20 assorted
singles, duals, pads, etc. Some with
switch..........
$3.95
UN RA
DUAL SPEED RECORD PLAYER,
78 and 333^ RPM, AC or DC in Porta ble leatherette carrying case with 8"
WASHINGTON, D. C.
speaker and 3-tube amplifier. Heavy
12" table, adjustable speed motor, slightly used but reconditioned and guaranteed............ $12.50
938 F STREET. N.W. WASH. 4. D. C.
107
Have you tried,
the Drake
Low Pass Filter?
Read what one ham
says:
- --------- --
"ßefore T
mmi*^nnyCmss.ttT.a4ll0idn0igstor»rtthe°e"ud
hath
ttie
auubu v-- channel 4
oi jf
a
tare , SO feet away-
NTow Ttneerrec is no interi
·"Î.ÎÏÏSÂ
If youi transmitter LS shielded and you have filtered the AC line, it is a sate bet the Drake Low Pass Filtei will eliminate your TVI.
installed in your transmission line the filtei attenu ates antenna and feed system harmonic radiation above 40 MC. with no reduction of your fundamental when operating in the ham bands, 10 to 160 meters Handles 1 KW. Two models available.
TV--52--40LP for 52-Ohm Coax TV--300LR for 300-Ohm Twin Lead
Either Model
95 ^dd
Amateur Net
tor postage
For more information write for Drake Amateur Bulletin
Have you told your neighbors
about the Drake
High Pass Filter?
Installed in the input to the TV receiver or booster
the Drake High Pass Filter rejects diathermy ama
teur and SW broadcast, QBN and other noise below
50 MC Protects the I.F channel and video amplifier.
To help sell them to your neighbors (List Price
$5.95) write tor folder 'The Need tor a High Pass
Filter" tv-300-50HP /or 300-Okm Twin Lead TV-12-50HP for 72-Ohm Small Coax
Either Model
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509 ARCH STREET · Philadelphia 6205 MARKET STREET · West Phila. 6th & ORANGE STS. · Wilmington 4401 VENTNOR AVE.« Atlantic City
108
116th DX Competition
(Continued from page UD
full report will be carried in QST. In addition, special recog nition will be made as follows:
ai Special certificates will be awarded to the 'phone and to the <',w. winners in each country (as shown in the ARRL Countries List) and in each of the 72 U. S. and Canadian ARRL sections Gee page 6 of this issue) from which valid entries are received. Only single-operator stations will be eligible for these awards.
b) A suitable certificate will be awarded to the operator making the highest single-operator 'phone score in each ARRL-affiliated club, provided the chib secretary submits a listing of a minimum of three 'phone entries by bona fide? resident members of such club, and provided further that these scores are confirmed by receipt at ARRL head quarters of the individual contest logs from such members. The highest single-operator c.w. scorer in each club will be awarded a. certificate under the same conditions.
ci ARRL will award a gavel to the affiliated club sub mitting the greatest aggregate 'phone and c.w. score by bona fide resident club members, whether single- or mul tiple-operator entries, provided such scores are confirmed by receipt at ARRL headquarters of the individual contest logs from such members,
13) Judges: All entries will be passed upon by the ARRL Award Committee, whose decisions will be final. The Com mittee will void or adjust entries as its interpretation of these rules may require.
14) Disqualifications: Off-frequency operation (as con firmed by a single FCC citation or advisory notice or two accredited official observer measurements) will disqualify. Low tone reports in logs will also be considered by the ARRL Award Committee as grounds for disqualification.
Happenings
(Continued from page 81»
to be unable tn appear for examination at the time and place designated by the Commission.
Technician Class. ·-- Any citizen of the United States. Novice ('lass. -- Any citizen of the United States except a former holder of an amateur license of any class issued by any agency of the United States government, military or civilian.
Section 12.28 is amended to read as follows:
§ 12.23 (..'lasses and privileges uf amateur operator licenses. --
Amateur Extra Class. -- All authorized amateur privi leges including such additional privileges in both communi ention and technical phases of the art which the Commis sion may consider as appropriately limited to holders of this class of license.
Advanced Class. -- All amateur privileges except those which may be reserved to holders of the Amateur Extra Class license.
General and Conditional Classes, -- All authorized ama teur privileges except the use uf radiotelephony on the fre quency bands 3800 to 4000 kilocycles, and 14200 to 14300 kilocycles and except those which may be reserved to holders of the Amateur Extra Class license.
Technician ( 'lass. -- All authorized amateur privileges in the amateur frequency bands above 220 megacycles..
Novice Class. -- Those amateur privileges as designated and limited as follows:
(a) The d.c. plate power input- to the vacuum tube or tubes supplying power to the antenna shall not exceed 75 watts.
(b) Only the following frequency bands and types of emission may be used, and the emissions of the transmitter must be crystal-controlled:
! 1) 3700 to 3750 kc, radiotelegraphy using only type Al emission in accordance with the geographical restrictions set forth m § 12.111 (a) (2) (i),
(2) 26.960 to 27.230 Me. radiotelegraphy using only type Al emission.
(3) 145 to 147 Me, radiotelegraph.y or rudiotelephoriy using any type of emission except pulsed emissions and type B emission.
Section 12.2! is amended to read as follows:
§ 12,27 Renewal of amateur operator license. (g) An amateur operator license, except the Novice;
(Continued. <m page 110)
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For Small Transmitters. DC Voltage Ratings are Approx. Values
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110
Class, may be renewed upon proper application stating that the applicant has lawfully accumulated a minimum total of either 2 hours operating time during the last 3 months or 5 hours operating time during the last 12 months of the license term. Such "operating time", for the purpose of re newal, to be counted as the total of all that time between the entries in the station log showing the beginning and end of transmissions as required in § 12.136(a), both during single transmissions and during a "sequence of transmis sions" as therein provided. The application shall, in addi tion to the foregoing, include a statement that the applicant can send by hand key (i.e., straight key or any other type of hand operated key such as a semi-automatic or electronic key), and receive by ear, in plain language, messages in the International Morse Code at a speed of not less than that which was originally required for the class of license being renewed.
(b) The Novice Class license will not be renewed. (c) The applicant shall qualify for a new license by examination if the requirements of this section are not fulfilled. (d) The renewal application shall be accompanied by the applicant's amateur operator license, and also by his ama teur station license if he holds one. (e) Application for renewal of an amateur operator li cense may be filed not earlier than 120 days prior to the date of expiration and not later than a period of grace of one year after such date of expiration. During this one year period of grace an expired license is not valid. A renewed license issued upon the basis of an application filed during the grace period will be dated currently and will not be back-dated to the date of expiration of the license being renewed. This one year period of grace shall apply only to licenses expiring on or after January 1, 1951. (f) Renewal applications shall be governed by applicable rules in force on the date when application is filed. Section 12.29 is amended to read at follows: § 12.29 License term. -- Amateur operator licenses are normally valid for a period of 5 years from the date of issu ance of a new or renewed license, except the Novice Class which is normally valid for a period of 1 year from the date of issuance. Modified and duplicate licenses shall bear the same date of expiration as the licenses for which they are modifications or duplicates. Section 12.42 is amended in the following particulars: 1, Element 1 is amended to read as follows: Element 1. Code test. -- Ability to send by hand key (i.e., straight key or, if supplied by the applicant, any other type of hand operated key such as a semi-automatic er electronic key), and receive by ear, in plain language, mes sages in the International Morse Code at a speed of not less than 13 words per minute, free of emission or other error for a continuous period of at least 1 minute, during a test period of 5 minutes, counting five characters to the word, each numeral or punctuation mark counting as two charac ters. 2. .4 new element designated as Element 1(E) is added to
read as follows: Element 1 (E) Code test. -- Ability to send by hand key
(he., straight key or, if supplied by the applicant, any other type of hand operated key such as a semi-automatic or electronic key), and receive by ear. in plain language, messages in the International Morse Code at a speed of net less than 20 words per minute, free of omission or other error for a continuous period of at least 1 minute, during a test period of 5 minutes, counting five characters to the word, each numeral or punctuation mark counting as two charac
ters.
3. .4 new element designated as Element 1(NT) is added to
read as follows: Element 1(,NT). Code test. -- Ability to send by hand key
(i.e., straight key or, if supplied by the applicant, any other
type of hand operated key such as a semi-automatic er electronic key), and receive by ear, messages in plain lan
guage in the International Morse Code at a speed of not less than 5 words per minute, free of omission or other error for a continuous period of at least one minute during a test period of five minutes, counting five characters to the word, each numeral and punctuation mark counting as two characters.
4. A new element designated as Element 3(N) is added to
read as follows: Element 3(N). Rules and regulations essential to begin-
(Continued on page 112)
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112
n* ets operation, including sufficient elementary radio theory for the understanding of these rules.
ii. A new element designated as Element 4(.E} is added to
read as follows:
Element 4(E). Advanced radio theory and operation as utilized in modern amateur techniques, including, but not limited to radiotelephony, radiotelegraphy, transmissions of energy for measurements and observations applied to propagation, to the radio control of remote objects and for similar experimental purposes.
Section 12.43 is amended to read as follows:
§ 12.43 Elements required for amateur operator license examinations:
Amateur Extra Class. -- Examination consists of «de ments 1(E), 2. 3 and 4(E).
.Advanced Class. -- Examination consists of elements 1, 2, 3 and 4.
General Class and Conditional Class. :-- Examination consists of elements 1, 2 and 3.
Technician Class. -- Examination consists of elements 1(NT), 2 and 3.
Novice Class. -- Examination constats of elements 1(NT) and 3(N).
Section. 12,44 i» amended to read as follows:
§ 12.44 Manner of conducting examinations. (a) The examinations for all classes of amateur opi-rator licenses, except Conditional Class, will be conducted by an authorized Commission employee or representative at locations and at times specified by the Commission provided that the examination for Technician and Novice Classes may be conducted as set forth in (c) below under the following circumstances: (1) If the applicant's actual residence and proposed ama teur station location are more than 125 miles air line distant from the nearest location at which examinations are held at intervals of not more than 3 months for amateur operator license: or if the applicant is shown by physician's certificate to be unable to appear for examination because of pro tracted disability; or is shown by certificate of the com manding officer to be in the armed forces of the United States at. an Army, Navy. Air Force or Coast Guard station and, for that reason to be unable to appear for examination at the time and place designated by the Commission. l.b) A holder of a Technician or Novice Class license ob tained on the basis of an examination under the provisions of (c) below is not required to be re-examined when changing residence and station location to within a regular examina tion area, nor when a new examination location is established within 125 miles of such licensee's residence and station location. (c) Each examination for Conditional ('lass, and for Technician or Novice Class licenses, under the conditions set forth in paragraph (a)(1) above, will he conducted and supervised by not more than two volunteer examiners, whom the Commission may designate or permit the applicant to select; in the event the examiner for the code test is selected by the applicant, such examiner shall be the holder of an Extra Class. Advanced Class or General ('lass of amateur operator license or shall have held, within the 5 years prior to the date of the examination, a commercial radiotele graph operator license issued by the Commission or within that time shall have been employed in the service of the
United States as the operator of a manually operated radio
telegraph station. The examiner fur the written test shall be
at least 21 years of age.
Section 12.46 is amended to read as follows:
§ 12.46 Examination credit.....An applicant for a higher
class of amateur operator license who holds a valid amateur operator license issued upon the basis of an examination by
the Commission will be required to pass only those elements
of the higher class examination that were not included in
the examination for the amateur license held when such
application was filed. However, credit will not be allowed for licenses issued on the basis of an. examination given under
the provisions of § 12.44(c).
An applicant for Amateur Advanced Class operator license
will be given credit for examination element 4 if within 2
years prior to the receipt of his application by the Commis sion he held Class A privileges'or an Advanced. Class license.
An applicant for any class of amateur operator license,
except the Extra Class, will be given credit for the tele
graph code element if within 5 years prior to the receipt of Ids application by the Commission he held a radiotelegraph
(Continued on page 114)
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NOMI.. · a"4 f*'c "
cut saw® and OBUJNG openings to radio chassis
first or second class operator license issued by the Federal Communications Commission.
No examination credit, except as above provided shall be allowed on the basis of holding or having held any amateur or commercial operator license.
Section 12.65 is amended to read as follows: i 12.65. License period. -- The license for an amateur station is normally valid for a period of 5 years from the date of issuance of a new or renewed license, except that as amateur station license issued to the holder of a Novice Class amateur operator license is normally valid for a period of 1 year from the date of issuance. Modified or dupli cate licenses shall bear the same issue date and expiration date as the licenses for which they are modifications or duplicates.
WITH THE GREENLEE No. 731 SQUARE RADIO CHASSIS PUNCH
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In size* »·', M"and 1" Write today for facts and prices on this handy Punch. Greenlee Tool Co., 1861 Columbia Ave., Rockford, Illinois
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The new TRYLON #650 doublewelded antenna mast weighs only 2 lbs. per foot; is easy to erect and climb; gives you a mast height of from 10 to 60 feet; and costs little more than $1 per foot complete with fittings! It is hot-dipped galvanized after fabrication and comes in handy 10 ft. sections. The ideal support for doublet, rhombic or other wire-type antennas; lightweight rotary beams or for portable antennas at field meets! Featured by leading distribu tors. Write for free folder.
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Single Sideband
(Continued from page 38)
the number of tubes in my s.s.b. rig and the old a.m. rig, and I come up with three less tubes in the present layout!"
Dick at W3ASW has a new filter using the de
sign of W0MNN and toroid forms from some old telephone loading coils. He and W40LL were the 75-meter stations that worked DL4PA on 14 Me. via W3FRS, as reported last month. But the one we like is the time Dick was duplexing on 75 with both W2SHN and W2WC, who were both on the same frequency. Hoagy asked for some informa tion Dick had in the next room, and while Dick left his rig (turned on) to get the dope, SHN and WC called and worked each other duplex with W3ASW as the connecting link. This generated the idea that with one noble character serving as the relay point on one frequency, a bunch of s.s.b. stations on another frequency could have a duplex round table! It might bring up a little problem of proper signing and identification, which could no doubt be ironed out to the satis faction of the FCC, but it certainly opens up some possibilities. Dick now has his station rigged so that he doesn't need the 'speaker-to-microphone acoustical link to act as a relay.
We mentioned last month how W2KUJ and W4OLL had polled all of the s.s.b. operators for their opinions about an exclusive assignment for the stuff and found the majority opinion against it. However, we continually receive letters at Headquarters suggesting a small exclusive as signment "to see what s.s.b. will do and to set off a small band where we can find these sta tions." If we may intrude a personal opinion at this point, it seems to us that it would be much better if, at some future date when the roster shows 50 or 75 active stations across the country, the League were to approach the FCC to see if the s.s.b. gang might be permitted a small ex clusive assignment for 24 or 48 hours, during which time all of the active stations would spend as much time as possible in demonstrating s.s.b. techniques. The nonparticipating but interested amateurs could then spend all the time they wanted in observing what an exclusive s.s.b. band would be like. This is just a personal thought, of course, and right now we don't have enough active stations across the country to make it worth while. But the time is rapidly approaching, because there are new ones showing up all the time. What do you think? -- B. G.
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115
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116
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vww wj
How's DX?
(Continued from page 40
W3LYK/KC4 renown. W3LYK is now extremely occupied
with the maintenance of a string of radio conununications
in the vicinity of the Khyber Pass in Afghanistan. Of para
mount interest is the fact that he disowns any knowledge of.
the operations of YA3B or any other contemporary claimees
to YA locations. He'll remain there for an indefinite period
longer but is growing quite homesick for his old Antarctic
stamping grounds ___ . _ licensing machinery is now
functioning in Poland, vouchsafes W2QHH. Prewar veter
ans will display SP1 labels while SP5 will designate new
blood in the ranks----PX1A (no. Jeeves, the real one!
lost his 803 rig recently by lightning after fifteen years of
faithful service and is in dire need of replacement gear. For
obvious reasons he cannot stroll over to a supply house for a.
refill and consequently wonders if any of the W gang could
lend a hand. Rick has a particular .yen for an 803 and a
2000-volt hummer to match although he'll be grateful for
other equivalent components instead. Post via P. O. Bor
273. Chihuahua, Mexico, and this, incidentally, is also his
address for QSLs ._---- .__ \llow us to make a correction
here of WOCDP's 15th ARRL DX Test scores as published
in a previous QST. His 'phone tally was inadvertently listed
in the c.w. section and his c.w. total omitted. W0CDP placed
second in Colorado with 10,191 points on c.w. and fourth in.
his section on 'phone with 855
Those of the faith
ful who conversed with PK2AM on 20 meters during June.
1949, will be interested to learn that all is well and that you
may reach him with a card now through ARRL. The gentle
man survived a rough spell during hostilities over there but
is at a loss for gear. He trusts to become active again in the
near future. W6A0A furnished his first DX QSO . ..., - ....
VR5PL informs us of his new 3-year contract with the Ton
gan government radio station and ventures to s*ay that the
entire pack of W/VEs may yet get a crack at him. [No
good, boss. At 50 Ws a day' for 1095 days you'd still be out
in the cold. --
Hmph. At the moment., however, Noel
needs a power pack for his 807s and the other ham on the
island is awaiting chokes for his modified ART-13: that
would be VR5GA. VR5PL contemplates lU-meter activity
at 0100-0200 and 0400 onward daily plus week-end sessions
between 2000 and 0701) GCT using a.m., n.f.m. and s.s.b,,
the latter due inspiration by W1DX. VR5s AF, IP and JA
have all shipped out
KL7ZO blew back into Uncle
Sugar and hasn't anything good to say about. Alaskan propa
gation conditions. Stan fired up gear all over the Territory
and found the best spot away up past the Arctic Circle
bordering the waters. Frequent blackouts knock large holes
in propagation charts and DX skeds are pretty tough to
maintain, especially during winter. Mail sent to 8637-138
St., Jamaica, L. I., N. Y., will reach KL7ZO/W2______
Anticipating much activity on ten and twenty this season,
ZSaD would have it known that all QSLs received by him
are answered immediately. Ivan uses fifty watts and art
SX-28
Word from VP4LC (ex-VP4TAC) specifies
that Trinidad three-letter calls are being switched to two-
letter jobs because the former am too similar to commercial
assignments . _ ... . _ The ZS6VM0 active for a few days in
December last was a specially authorized station operating
at the unveiling of Monument Koppie. a Voortrekker com
memoration near Pretoria, attended by over tUO.UOO. Dis
tinctive QSLs will be issued and all cards received will be
kept on permanent display in the monument.-- Some
joy boy has been borrowing \ K.2BC's cull for use on 14-Mc.
c.w. and naturally QSLs for these contacts must go unveri
fied. The legit VR2BC is up to snuff on his confirmations, all
sent by bureau. UTiat is more, there are no jake three-letter
calls in Fiji. VR2AQ has closed down for reassignment but
VR2AP will return to action after his New Zealand leave
about February. A card from North Carolina will complete
a hard-earned WAS for VR2BC
FEARL Proxy
JA2GY reports good reception of the Voice of America's
amateur radio feature program from Hawaii on Sundays al
though the 15.25-Mc. outlet has been intermittently jammed
. =
in the Northern California DX Club's The. DXer
we see that the boys have definitely tagged VR3AB and
VK4SL VR1 as leg-pullers and that CR1, AA is supposedly
temporarily QRT for rebuilding purposes.
Groan. . . . That boxing gloves Christmas gift to Jeeves was a sad thought. How were we to know he was once the, Lancashire bug-weight champ?
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118
Phase-Shift Networks
(Continued from page 45)
s and a correspond to those same parameters in Dome's article, while the Q in Luck's paper is equal to 1/s.
For the design described in the text, s = 3.540, r = 1.970, and fa = 1000 c.p.s. Using these values, the 89- and 90-degree points for the whole network can be calculated by solving (1) for f/fo. Similarly, the 90-, 180- and 270-degree check points for one channel can be found by equating (2) to 4-1, infinity, and -- 1, respectively, and solving for///i and///2.
If this is done, the 89-degree points occur at f/fo = 0.3285, 3.044. The 90-degree points occur at f/fo - 0.359, 0.834, 1.199 and 2.784. The check frequencies are then
Channel A
f/fo
90°
7.492
180°
1.97
270°
0.518
Channel B
0
f/fo
90° 1.9304 180° 0.5076 270° 0.1335
U. S. N. R.
(Continued from page 47)
The Sixth Naval District Reserve Master Con trol Station conducted a surprise emergency and change-of-frequency drill on 21 September 1949. All stations were directed to shift transmitters and receivers to a designated frequency, and to use emergency power facilities. It was a realistic drill and pointed up certain weaknesses at some stations. However, the following complied in all respects: U. S. Naval Reserve Training Centers at Raleigh, N. C. (K4NAW); Jacksonville, Fla. (K4NR); Orlando, Fla. (K4NR0); Sheffield, Ala. (K4NAT); Gulfport, Miss.; Greensboro, N. C. (K4NRJ); Tampa, Fla. (K4NRC); and Electronic Warfare Company 6-13 at Daytona Beach, Fla.
Naval Reservists associated with Electronic Warfare units in the Hawaiian Islands were af forded an opportunity for realistic training co incident with MIKI, a large-scale Army-Navy amphibious exercise conducted in the fall of 1949. For the MIKI "invasion" an "Early Warning Net" comprised of Civilian Defense, National Guard and Naval Reserve units on all of the major islands was called into action and as signed the mission of providing early warning of the presence of "enemy" aircraft or vessels. The Coast Watchers, civilians of every race, creed and position, were stationed at strategic locations, and assigned the task of spotting and reporting to their respective reporting centers the number of ships or aircraft sighted, together with all perti nent details. Relay from observation posts was generally by telephone, walkie-talkie, or via local
(Coniwiued on page 120)
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police radio. Once the information was at the re porting centers where communication facilities were available, it. was a matter of only minutes before the defense forces were evaluating the information and planning counterattacks. The Naval Reserve Electronic Warfare Facility at Hilo was the main reporting center for the island of Hawaii. The Electronic Warfare Facility at Kahului served as reporting center on Maui, while on the island of Lanai the Electronic War fare Facility at Lanai City carried on. With the employment of c.w., radioteletype and voice radio, Electronic Warfare personnel who par ticipated in Exercise MIKI agree that the train ing received was the equivalent, of many months of .scheduled drill instruction.
Hints & Kinks
(Continued from page 46)
brought to zero beat with the variable oscillator at, say, 3101 kc. The tuning rate will be the same as it is on the fundamental frequency, but the percentage accuracy is limited mostly by the stability of the crystal. A vernier adjustment to set the crystal to zero beat with WWV would be handy. No impairment of the normal functions of the meter was noticed after the amplifier was installed. -- Henry II. Cross, W100P
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120
Beginner's Question
(Continued from page 01)
is in a better position to work DX than his neigh bor with a kilowatt 'phone.5 This is no small fac tor in keeping amateur radio the most demo cratic of hobbies.
Me? -- I heat up the 'phone bands with a pair of GL813s as I mentioned before but I must con fess that I batted a bug on c.w., and liked it, for a whole year after 1 had my Class A ticket, and I still listen in often to the c.w. rag-chews on 40 and 80. As an old-timer,6 my advice to you young squirts trying to decide between c.w. and 'phone is to try them both, pick which you like best for most of your ham activities, but don't be one sided about it.7 You'll miss a lot of fun if you do.
6 Assuming equally efficient antenna systems for both. 6 Figure of speech, OM. Got my ticket in 1944. " According to the ARRL Handbook, the amateur is sup posed to be well-rounded. This does not mean obese.
Correspondence
(Continued from page 61)
were hams, with 11KN and his wife and HIT and. his wife present, and Lucky translating what the priest said, and Gobi and I answering "SL" We received a very nice demon stration from them of the spirit that underlies amateur radio.
Just as we will not forget the memories of our visits tn Florence, Rome and Venice, neither will I be able to forget the meaning of such friendships made by personal visits to amateurs in various countries.
--Bob Leo, W6PBV/MP4BAL
(Continued on page 122)
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121
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NATIONAL
* Proven · D epondnble · Q ualiiy
HAM SPIRIT
1637 S. Kilboum Ave., Chicago 23, III. Editor, QST:
On a vacation trip through the West recently I utilized my 10-meter mobile rig occasionally to call "CQ Chicago" to get messages to the folks back home.
It was gratifying to hear amateurs as far away as Mil waukee and northern Indiana come back and offer to relay messages and even to make 'phone calls if necessary.
To the many readers who have written in deploring the disappearance of "the old ham spirit," I can testify that if you take the trouble to look you will see it alive and kicking.
-- Ralph Eisenschim, W9HVG
Redley House, Mansfield, Ringwood, Hants., England Editor, QST:
This is a short note to let you know what a wonderful reception all your hams whom I visited gave me.
I have just spent over two months in the States. My wife, daughter Zoe, and little grandson Tommy, took a 2500mile trip to Miami, returning through Tampa and Birming ham, which gave me an excellent opportunity of calling on various hams. My XYL knew what it meant when I pulled up at a house with a rotary beam, or an antenna with what she termed a "ladder" (600-ohm feeder).
Without exception they all treated me in a wonderful way which I never even dreamed of -- what a fine brother hood ! I only hope I shall be able to return such hospitality.
-- C. Keith-Murray, G6DY
TX-19 A steatite-insulated, flexible coupling for Ya"
shafts, conservatively rated at 5000 volts
peak. Dia.
length 1". Length and flashovervoltage
can be increased by turning collars outboard. $1.25 net.
TX-23 A deluxe, insulated, flexible coupling de
signed for coupling Ya" shafts. Will handle a
maximum radial mis-alignment of 1 /16", also a two-
degree angular mis-alignment. $1.35 net.
YX"24 $ame a$ TX-23 but shaft size 5/32/z. $1.35
net.
^ame as TX-23 but non-insulated. $*315 net.
XS-9 Feed-through insulator. Hole size 13/64/z. In
sulators are adjustable for different partition thicknesses on silver-plated terminal stud. Ceramic insula tors are of high-grade material designed for highfrequency equipment. $.30 net.
THOSE USED HANDBOOKS
83 Koster Row, Eggertsville. N. Y. Editor, QST:
I have been wondering if the American ham shouldn't start giving a bit of thought and perhaps assume some responsibility toward those fellows with foreign prefixes, who are not quite so fortunate. I think you will agree that the average W or K is ridin' pretty high so far as amateur radio is concerned. In contrast, there are some foreign fel lows who are struggling along with a minimum of equipment to say nothing of the lack of handbooks and callbooks. It is the latter accessories with which this letter is concerned.
As you know, handbooks and callbooks are purchased by the thousands each year. What becomes of the old ones? Are they thrown out or burned in the furnace? Don't you think they might be put to better use tn far-off places, where it is impossible to buy them, or to transfer funds out of the country because of various governmental restrictions? Don't you think the American ham can be a factor here in spreading a bit of good will, as well as doing some fellow a fine deed?
-- William B. Derrick, W2UXT
CO-OPERATION
1546 Fuller Ave., N.E., Grand Rapids 5, Mich. Editor, QST:
Let's have a better cooperative spirit. Let's at least wait until the other fellow is done before calling that DX. Keep the final off until you are ready to call the station. Don't tune all over the band with a VFO and final going at once. Give the little fellow a break. If the DX is calling some par ticular area, don't be slighted if he doesn't include you. Don't bust in if he doesn't want a W6 or a W8. More listen ing and less calling will result in many more QSOs for every one. Let's not learn our lesson the hard way.
-- Louie Gerbert, W8N0H
RADIO and TELEVISION
Thorough Training in All Technical Phases
APPROVED FOR VETERANS
WEEKLY RATES
DAYS--EVENINGS
RCA GRADUATES ARE IN DEMAND
For Free Catalog write Dept. ST-50
RCA INSTITUTES, INC.
A Service of Radio Corporation of America 350 WEST 4th ST.. NEW YORK 14, N. Y.
"HARMONIKER"
' Bert's the latest, and most sensational TVI filter -- as
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Unlike 40 MC Tow pass filj ters, this half-wave filter at2 tenuates ALL harmonics (as
much as 110 DB for the TV band harmonics of an 80
SIX SECTION
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For 50 to 100-ohm coaxial cable (Includes coaxial fittings): With 1000 Volt (2000V Test) SILVER MICA condensers lor stabilized tuned circuits. Will handle 1 KW CW or 250 W AM
Fone RF output.
80 Mete» - FI-85 $5.99
40 Meters - FI-45 $4.99
20 Meters - Fl-25 $4.29
10 Meters - FI-15 $3.79
3 Same with 2500 Volt (5KV Test), 2% Transmitting Mica C*on
fl denser« to handle a full KW Fone!
80 Meters - FI-86 59.95
40 Meters - FI-46 $8.41
20 Meters - Fl-26 $7.21
10 Meters - FI-16 $6.65
TV RECEIVER FILTER
Super-effective multiple section high-pass filter attenuates
all low frequencies more than 60 DB down at TV IF fre
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For 300-ohm Ribbon ..TV300-50HP Cho'|fe
57
For Coaxial Cable TV-72-50HP VnOICe ^.3/
LOW PASS TRANSMITTER FILTER
Drake low-pass transmitter filters are now available for twin lead as well as coax lines. Use on any .band, 10 to 160 meters -- up to 1 KW input power.
For Coaxial Cable -* TV-52-40LP
For 300-Ohm Line - TV-300LP Choice $12.95
For 200 to 600-ohm twin lead or spaced open wire. (Includes feed-thru insulators): With 1000 Volt (2000 V Test) SILVER MICA condensers. Will handle 1 KW CW or 250 Watts AM
HIGH VOLTAGE HYPASSES"
Fone.
80 Meters - FI-83 56.71
20 Meters - FI-23 55.87
40 Meters - FI-43 55.47
10 Meters - FI-13 $5.35
Same with 2500 Volt (5KV Test) 2% Transmitting Mica Con
densers to handle a full KW Fone.
80 Meters - FI-84 $7.95
20 Meters - FI-24 $7.79
40 Meters - FI-44 $7.47
10 Meters - Fl-14 $7.27
Special copper plated utility box provided with all kits except
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Special! Special! Special! Copper plated utility boxes 3"x4"x5". Just the thing for those
CAP. 005 01
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INCE
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National "Selcct-O-Ject" tfoyi oc
____ Complete with tubes
__________
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home IN-IK
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I
HAM-A-LOG featuring new anti-TVI itemsr terrific bargains
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RCA WV-65A BATTERY VOLTOHMYST
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A completely self-contained, [portable type, vacuum tube volt¡moter-ammeter-ohmetor. No ex3eternal power required. Single "Iinstrument serves for bench and
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123
HAM-ADS
< D Advertising shall pertain to radio and shall be of nature of interest to ladio amateurs or experimenters tn their pursuit of the art.
(2) No display of any character will be accepted, nor can any special typographical arrangement, such as all or part capital letters be used which would tend to make one adver tisement stand out from the others.
i3> The Ham-Ad rate is 30£ per word, except as noted in paragraph (6) below.
«4) Remittance in full must accompany copy. No cash or contract discount or agency commission will he allowed.
(5» Closing date for Ham-Ads is the 25th of the second month preceding publication date.
(6) A special rate of 7i per word will apply to advertising which, in our judgment, is obviously non-commercial in nature and is placed and signed by a member of the Ameri can Radio Relay League. Thus, advertising of bona fide surplus equipment owned, used and for sale hy an individual or apparatus ottered for exchange or advertising inquiring for special equipment, if by a member of the American Radio Relay League takes the 7e rate. An attempt to deal in ap paratus in quantity for profit, even if by au individual, is commercial and all advertising by him takes the 30^ rate, Provisions of paragraphs (1), t2) and (5), apply to all advertising in this column regardless of which rate may apply.
(7) Because error is more easily avoided, it is requested signature and address be printed plainly.
<8i No advertiser may use more than 100 words in any one issue nor more than one ad in one issue.
Having made no investigation of the advertisers in the classified cainodtlveuegmrrtniistsye,do.thr feorputhbel.isghraedrse oorf OchSaTracatreer ounf tahbeleprtoodvuocutschorfoserrvthiceeisr
Please note the 7^ rate on hamads is available to ARRL members only.
QUARTZ -- Direct Importers from Brazil of best puality pure nuartz suitable for making piezo-electric crystals. Diamond Drill Carbon Co., 719 World Bldg,, Now York City. '>SLs. 100, SI.25 uu. Stamp for samples. Griffeth. W3FSW, 1042 Pine Heights Ave., Baltimore 29, Md. AMATEUR radio licenses. Complete theory preparation for passing amateur radio < «aminations. Home study and resident course«, American Radio Institute. 101 West 63rd Street. New York City. OSL's. SWL's. Finest stock. Fairest prices. Faster service, Dossett, W9BHV QSL Factory. 857 Burlington, Frankfort, Ind. QSLS! Kromkote cards at a fair price. Dauphinee. W1KMP, Box 219, Cambridge 39, Mass. SUBSCRIPTIONS. Radio publications a specialty. Earl Mead. Huntley, Montana, W7LC-M. DON'S QSL's. "The finest". Samples. 2106 South Sixteenth Avenue, Maywood, Illinois, CRYSTALS: Precision low drift units. Type 100A in 80, 40, and 20 meter bands. Two units plug in one octal socket. Plus or minus 5 Kc. One dollar each. Exact frequency. SI ,95 ea. Rex Bassett. Inc.. Ft. Lauderdale. Fla. QSLS, SWLS. Those who want the best in QSLs. C. Fritz. 1213 Briargate, Joliet. 111. QSLS: Original designs priced to fit hams' pocketbooks. Stamps for samples. Leonard's Print Shop, 854 View, Hagerstown, Md. QSL-SWL cards, personalized with photograph. The very best. Samples for addressed, «tamped envelope. Bob Payne. W0OJC, Marshall, Missouri. QSL's, high quality,.tair prices. Samples.'' W7GPP R. D, Dawson. 1308 F Street. The Dalles, Oregon, QbL's. Stationery, all kinds printing for the Ham. Samples free. W4HUD, Albertson Box 322. High Point. N. C. QSL, SWT- cards. Jaggi, W5FAY. 6118 Goliad. Dallas, Texas, WANTED: QST for February, March, July. 1916, Have January. September, October 1916; July 1917 and 200 other copies to sell or trade. W0MCX. 1022 N. Rock Hill Rd., Rock Hili 19. Mo. FOR sale; El cor Twin Track recorder, practically new, with halfhour of tape with code recorded from 5 w.p.m. to 15 w.p.m, $95,00. Faust. H. Boyd, Ashton. Hl. UIST1NCTIVE SWLS·QSLS. McEachron, 1408 Brentwood? Austin. Texas. BARGAINS: New and used transmitters-receivers-parts: Globe King, $299,00; new 150-wa.tt phone $199.00; 60-watt phone, $99.00; Globe Trotter, $57.50; HT-17, $39.50; New Meissner Signal Cali brators. $29.95; TK-4, $19.95; MB-611, $39.00; Pierson KP-81. $219.00; HKD 5TA1, $199,00; SX 43, NC173. HQ-129X, $139.00; KME-45, SX-25. $90.00; Howard 430. $29.50; S-.38, $29.95; S-41. $22.50; latest signal shifter, $59.(J0; DB22A. $49,00; BC-610's. AF100, and many others. Large stock trade-ins. Free trial. Terms financed by Leo. W0GFQ. Write for catalog and best deal to World Radio Labs, 740-42-44 West B'way, Council Bluffs. Iowa. N EW crystals for all commercial services at economical prices, also regrinding. Over fourteen years of satisfaction and fast service. Eid son Electronic ('otnpany, 1802 North Third St., P.O. Box 31, Temple, T exas. Phone 3901,
SEKI.? Complete 522, HRO W, RCA 155C 'scope, dual speed play back. Box 104, Brooklyn 28, N. V._____________________ _ SELL: HT-9, perfect condition. $2U0. W9MZW, Kingston, Illinois. BC.610: Sell final no .ver supply deck, less plate transformer; exciter «leek; drilled modulator deck chassis; lower cabinet skirts; lower control panel complete, with wiring; upper panels; exciter tuning boxes: meters. Want back covers; 25OTH socket mounting brackets; handles, hardware, etc. W. Straesser, W8BLR, 15384 Birwood, De troit 2t, Michigan.___ _______________, _______________ FOR sale: BC221 frequency meter AC power supply. SX2S special cabinet with speaker and 100 Kc xtal calibrator. Three power supplies nn one chassis, 1500 volts. 400 mils: 500 volts 175 mils; 250 volts, 150 mils. Also five inch 'scope VTVM Rf signal generator, Beachemin, W2CTB. 118 Lexington Ave., Passaic, N, J.
WANTED: Good communications receiver SX-42. Good medium or high power transmitters, Don Clark, 19 N. W. Main, Blackfoot, Idaho,
REK-O-KUT (RK-D16) dual speed 16" recording turntable, motor assembly and mounting base with overhead feed mechanism and Webster R84 magnetic cutter. ¿Astatic B-16 playback pickup. Good condition. $160.00. F.o.b. New York City, A. Vandervoort, W2DGG. 54 Morningside Drive, New York City 25.
F. M. Tuner. G-E De Luxe model #XFM-l. Perfect. $32.00. W2IWS. 161 Darlington Road, Syracuse, N. Y.
QSLS SWLS? " America's Finest!" No cheap trash! Samples, 3c. QSLprinter. Sakkers, W8DED. Holland, Michigan. Made-to-order QSLs.
COLLINS 3OK-1 with VFO exciter for sale, perfect condition. Original equipment, no changes. Best offer over $995.00 takes it, F.o.b. Chicago. May be shipped by truck. Fred D. Patti, W9JIE, 8811 Lowe Ave., Chicago 20, Illinois.
SWAP Kodak Retina II, f2 with case or Argus C-3 with case and slash in A-l condition for radio gear. Prefer Silver 801, 801 B. 802. 803. 701; Brush Soundmirror or Meissner portable radio-recorder. Also have Oerman 120 film f4-5 stereo camera, lenses good, shutters need repair. Reply via airmail. All F.o.b. Johnny Wine, Sr. BOQ Hq, FEAMCOM, APO 323, c/o Postmaster, San Francisco.
1-KW fone-xmittr, $250.00, portable 35 watt FM 10-meter xmitter, $30.00. Portable 10-meter receiver. $15.00. Two BC-37SE, 12 tuning units cheap. W8WSC. Box 516. Stryker, Ohio,
FOR SaletMIUen R-9er, used three months, in excellent condition. Complete with 10-meter coil and tube. $18.00. Richard W. Werner, W0SOY. Grand Rapids, Minnesota.
FOR Sale: A supply of first-class equipment, such as H F converters and transmitters, power supplies, modulators, test equipment, adjust-a-volts. Vibrapaks, HF beams, coils, condensers, xtals. All at 50% off regular price. Send card listing your requirements. Orval Hanson. W0HBA, Box 383, Watertown, South Dakota.
ONLY two left! Top quality AN/ART-13's, complete with tubes, dynamotor, plugs, dynamic mike and manual. $195.00. Fargo Elec tronic Engineering, 385 7th Ave., So.. Fargo, North Dakota.____
S-20-R receiver, 550 Kc. 44 Me, in good working condition; Velvet vernier dial, schematic. In use now. $30.00. A. T. Roberts. W5PJM. Route 5. Box 653, Shreveport. Louisiana.
MAKE au offer! 500 watt AM fone xmitter. 81 O's final. 11-104 mike, BC696, 30 feet windmill tower. 4-elernrnt. beam. W9UTL, 1768 Fruitdale.Avenue, Indianapolis. Indiana,
FOR Sale: Collins Kilowatt on 14,265 Kc. Price: $1500. Also: Collins 3QK. price: $850.00 F.o.b. Both guaranteed perfect. WICL'T.
MOTOROLA police radio installation. Transmitter, receivers, speech amplifier, frequency meter, accessories. Easily converted for ham use. Originally cost $3000.00, Price: $100.00. Write for complete de tails. W. B, Hort, City Hall. Sedalia. Missouri.
CUSTOM Rebuilt HRO, 6AK5 first R.F,, directly calibrated slide
rule dial, noise silencer, regulated -- compensated oscillator, rack or
table mounting, dust cover, power supply, eight coils continuous
coverage tion and
100 Kc. to 30 in alignment,
Me. AN $150.00.
connector W3NJE,
for Q5'er, P.O. Box
prelrlf,ecItvycloannddi,
Penna.
SELL: Instructograph. AC, ten tapes, instruction book; in excellent condition, Arthur Meinhardt, W2CMD, 1170 Brighton Beach Avenue, Brooklyn 24, New York.
FOR Sale: Complete ham station, Lafayette B-5 xmitter in floor rack with coils for 10, 20, 40 meters; Sky Champion receiver, antenna; Astatic mike, S-meter, many extras,--all for $300.00. To first bidder. Will ship via express anywhere. Reason for sale: YL trouble. W7IRN, Arthur H. Salsbury, 535 Lewis Avenue, Billings, Montana.
QSLS: "Doc's are fine, Jim's are »'lever, but Larry's aie the `beste*st ever," Samples on request. Larry's QSL Shop, Opportunity, Washington.
SELLING out: Transmitter. 50UW CW fone, using PP 812As with <811 modulators. Enclosed in all metal rack cabinet, BC-459 VFO and Turner microphone. Forty through ten meters, complete set of coils. $300.00 nr hest offer, R. P. Rushing, Box 426, Carlisle, Penna. Tele phone 5R31.
QsLS! G. L. Taylor, Sumrall, Mississippi._____ ____ ....
600 Mil power supply 1800,1500 or 1200 volts. $50.00. Kilowatt Class B modulator, $50,00, All new parts unmounted. W2BIG, Commo<lore Hotel, Atlantic City, N. J._____________________
BC348, AC power supply, speaker, electrical bandspread, double conversion through SCR274N. usable separately as broadcast re ceiver: ANL. all $50.00: SCR522, $20.00; Two PE 103Au, $13.00 each; 6v Vibrapak, 200 VDC 65 Ma, fully filtered, $10.00; AC-DG midget multimeter, $14.00; S40A, $45.00; 10-meter converter, $10.00; 10-meter transmitter (converted 522), AC power supply, ready to operate, $40.00; BC455 converted, for 6v. $7.50; numerous hard-to-find parts. Write for list. K2aAX, Rawson, 53 Richards Avenue, Dover, N. J. ___ _ ____________ _ ___________
FOR Sale: rack-mounted PA stage that will run about 350 watts. Tube complement, two 866JRS, VR150, 5Z3 and PP T35s. $48,75. All inquiries answered. Elbert N. Wood, W4OZY, 300 N. Haughton St., Williamston, N. C.
124
IH IlCtAHlHft
BLILEY AX2 xtals. guaranteed perfect; one dollar each (reason: VFO) following frequencies: 7356; 3629.2; 3586.1; 3572.4; 3637.5 Kes; Petersen "PR" 3676: 3657; 3651 3633._Kcs; Valpey .CMS <691 ; 3669 Kes. George M. Clark, ir.. W2.TBL, 222 Hicks Street, Apt. 4C, Brooklyn, N. V. _____ __ ____ _ _______ A RT-Ï3 for sale or will trade for Harvey -Wells T RS-50. Genc Pfeift er. 522 Hollins Ave., H*.elen Montana.
SELL: New Hallierafters S-72 portable. Want: S-39 portable, in best condition. Walter Camp, jr., 236 Emerson Street N. W., Washington n,D. c.
E<>R Sale: Unused ART-13, $100.00; used Millen exciter with full set of coils, §30,00. Little-used Millen VFO 90700, $30.00. Write to W7IKV, 1737 1 1th Avenue. Helena, Montana.
10 and 20 meter beams. §19.25 up. Aluminum tubing, etc, Willard Radcliff, Fostoria. Ohio.
OSLS: Quality is remembered long after price is forgotten! C. Fritz. 1213 Briargate, Joliet, Illinois.
NEW T-82A Selsyn indicators, $3.95; new RC-1206C, " Lazy QFiver", §5.95; new BC-453B. $12.95; FL-8A filters. $1.37. FL-5F filters, 92$. Excellent used AN-APS-13, $14.95. Guaranteed T-17 mikes, 69$ Trouble-shooting Manuals (includes schematics) BC348, BC-779, SCR-522. BC-610, $1.00 each. Add postage. Free cata log. Lectronic Research Laboratories, 1021-Q Callowhill St., Phila delphia 23, Penna. CLOSING out demonstrator models and slightly used AC lighting plants. 500 watt, $80.00; 1000 watt, $150.00; 2000 watt, $200.00; 2500 watt, $260.00; 5 K.W., $370.00; 15 K.W., $850.00. Manufac turers of converters and motor generator sets. Katolight, Mankato, Minnesota.
SELL: Hallierafters S-53, like-new in appearance and performance. Used only 3 weeks, $55.00. Fred Ball, jr., 120 West Hutchison, ban Marcos, Texas.
FOR Sale: Components for transmitters, receivers and power sup plies. W3PUE, J. A. Bowers, 1317 Valley P.L, S.E, Washington 20
SELL: Never used items: McMurdo Silver 703 Freq, multiplier, 3 through 60 megs.; HRO-W with 9-coil sets; 750 volt rack panel, 300 mil power supply, with Kenyon transformers and chokes. Also use Meissner De Luxe Signal Shifter, 80-40-20 coils, in excellent condition. Best offer all or part. E. H. Minturn, W4GYH. 317 Eighth Ave., S.. Lewisburg, Tennessee,
SELL or trade: new BC-375. 4 tuning units. Stancor 30M mobile xmitter. Converted prop-pitch motor. Model 80 recorder. Want: automatic bug, BC459, oscilloscope or what have y*our W8DXH, Grayling, Michigan.
SELECTIVE buying at northern New England's foremost amateur supply house insures top quality, up-to-date merchandise that repre sents the best value for your dollar. Evans Radio. Concord. N.H.
SALE: NC-173 with speaker and NBFM unit. Regular $217.45 for only $130.00. Used one month. John R. Crane. W0KOZ, Excelsior, Minn.
UNCLE Fred's QSLs. For Hams of distinction! Three colors and up. Rainbow map QSLs. Special DX QSLs. Samples. 10$. Uncle Fred, Box 86, Lynn, Penna.
ZIPPO lighter, ARRL insignia and call sign, inlaid enamel, $4.00. ideal birthday gift, McCarron. W2BNO, 3050 Decatur Street. New
HAMMARLUND 4-20 and 4-11 modulator, coils for 10-20-40-80 meters, ^40.00, also Sky Buddy, $15.00, Levern Glau. Route 1. Sioux City, Iowa.
GOING to low power on account of TVI. Sell or trade deluxe kilo watt phone. Cost over $1.200. Make an offer. Write for description. W5DA, 4425 Bordeaux, Dalias. Texas.
"TAB" Guaranteed tested tube specials: 954, 14$; 955. 16$; WE215A, VR92, CK1005, 9006. ea 18$; 1R5, 1S5, SY3GT. 6AG5, 6BG6G, 6BH6, 6H6GT, 6J6. 6SN7GT, 7Y4, 12AT7, 117Z3, each 37$; 388A. 40$, 1N34 xtals, 83$; 6V Carter Magmotors. 400V/150 Ma. $8.98; 250V/100 Ma., $4.98; Both $12.49. Tuning meters, 5 Ma, 98$. GE/2J1G1 Selsyns tested perfect used pair $1.49, VHF Mobile Hamband antenna 30Cm/12" AT5/ARR1. 39$ 4/$1,00. Excellent. Fidelity dynamic microphone plus matching hi-gain transformer, both $1.49. Write for Bargain "Tabogram". "TAB", 109 Liberty St., NYC, NY.
MAGAZINES: Radio, Electronic, etc. sold and bought. Landa, 157c Leverett, Boston 14, Mass.
BC348 with AC power pack. $50.00; BC-610E, $500.00; BC-939A antenna unit. new. $17.50; SCR-522, complete, cables & Mg. $40.00; Wilcox panel mount, 63A1 dual channel amp, $12.00; Wilcox 90A2 oscillator, $8.00; Wilcox M57D1 line amp, $10.00; Millen 90800. 50 watt xmittr, $25.00; Millen 90505 secondary std. 10-25-100-1000 Kc to SO Me, 800 eye. mod. 110 V. 60 cy. $50.00. N, K. Stover, W3BBV, 1357 Hill St., York, Penna. BC348-lf 1 i0V. $50oTr7s. Greenwald. 4929 Escalon Ave., Los .Angeles 43, Calif.
TRADE recording equipment and power tools for good transmitter. All inquiries answered. Allan Morrell, W2JKM, 78 Stephen Place, Valley Stream, N. Y.
ART-13 for sale, best offer. W0OAD, 1920 Willow Street, Denver, Colorado.
COMPLETE new PE-103, $11; new BC-459, $8.00. W0HRQ, 245 Quonset, Iowa City, Iowa.___________________________ _ QSLS-SWLS. Meade, W0KXL, 1507 Central Ave., Kansas City, Kans. WANTED; Collins 32V-1 or 2 transmitter. Curtis, KFRÖ, Longview, Texas. NEARLY new NC-183" $229.00;"¿xqsr §105.00; S-53, $59.00; NC-57 with meter. $75.00; BC610-E, $625.00; VHF-152, $59.00; Hunter Cyelemaster. $139,00. Many reconditioned sets at lower prices. Van Sickle, 102 South Penn St,, Indianapolis 4, Ind.
BARGAINS: New and reconditioned Collins, Hallierafters, Na tional, Hammariund. RME, Millen, Meissner. Sonar, Tclevar, receivers, transmitters, etc. Reconditioned S-40A. $59.00; SX-43, $129.00: SX-42, $179.00; NC57. S59.U0: NC-173, $139,00; NC-183, $199.00, HQ-129X, $129,00, SPC400X. $249.00; RME45. $99.00, RME84, DB22A, HF-10-20, VHF152A. HFS. HR07, HR05TAI. NC24OD, NC200, S-W, S-53. SX-25, SX 28A, S-47, BC-6IO, T35OXM, Collins, 75A1, Collins 32V1, etc. Shipped on approval. Terms. List free . Henry Radio, Butler. Mo,
FOR. Sale: HT-9 coils, 80-40-20-tO. 1 spare 814, excellent condition. Used 14 months. First check over $250.00 takes it. Reason for sale, no room or time to operate. John G. Seitzinger, W5OK.L-, Box 726, Pharr, Texas.________________ _________________ ______
HELP European hams to get on the air. Old magazines, call-books. Handbooks all very welcome, also radio parts. You can please th? XYL. and increase DX. Please mark with vour name and call, and send box by parcel post to R. U. Deck, 1807 APO 207-t. c/o Post master, New York City.
M EiSSNER "150B. complete with^iX)." $200.00. WiiliamS. Ros^ worth P.O, Box 383. Atlantic Ave.. West Sayville, L.I., N.Y.
FOR Sale: Complete converted ART-13. complete SC R-S22. ARC-3
VHF receiver, transmitter units, converted BO348Q. Best offer.
W0ZIS, 5245 Lansdowne Ave., St. Louis 9, Mo.
____ ____
SELL HRO-5TAI complete and good condition. First $200 check takes it. express prepaid. Lee G. Daw, W4FCU, 1532 Relmeadc Drive. Kingsport, Tenn,____________________________
.SWAP nearly new NC-183 (don't want to lose my shirt selling it out right) for high grade test equipment, new Frigidaire Deepfreeze etc. W9MAQ, 1237 Ninth St,, Beloit, Wisconsin.
FOR Sale Munger beam rotor, complete, $30.00; U.H.F, Resonator
10-meter 4-element beam. S30.00; filament transformer, four 6.3 volt
wtndings, 22 amps, $3.00. W4KLQ.
___________ __
NEW NC-183 receiver, speaker, and NFM adapter. $195,00. Sale
reason: inactive amateur. Richard Gysaii. 902 Hanna Building,
Cleveland, Ohio.
_____
_____
TECH NICAL manuals on SCR-21 i (BC-221) Freq. Meter. Original,
unused, 162 pages detailed data, schematics. $2,00 each, postpaid.
Frank Dunan. W3NB, 1717 Lang Place. NE, Washington 2, D, C.
MUST sell quickly. Complete ham station built into professional
console, including bX-32 receiver, 500-watt modulator. 300-watt
transmitter, HV power supply. 3-inch rack mounted 'scope, plus
valuable parts and equipment. Invite all offers, Sam Korin, 129
Wadsworth Ave,, New York 33. N. Y,
___________
SELL 2200-4400 each side center tap 1000 VA transformers, guar anteed. F, G, Dawson, 5740 Woodrow Ave,. Detroit, Michigan.
SELLING out whole works. Reason: college. Semi tor complete list. Dave Ott, W9HDK, Hinsdale, Illinois.____________________
WANTED: 250 to 3(M watt multi-match modulation transformer. Allan Moser, W9FHP, 1013 Randolph Street, Winnetka, Illinois.
FOR Sale; Nearly complete KW-CW kit including power supply, four 75Tl^s, condensers, rack, etc., plus many other parts. $90.00 or best offer for the whole lot, W2TAM.
FOR Sale: Hammariund 4-20 xmitter, with coils. In perfect condi tion. $35.00, M. Hart, 87 Sherman Avenue, Jersey City 7, N. J.
SALESMEN: Part time to sell complete line radio parts and equip
ment. liberal commissions, in all cities of over 10,000 population in
the states of Oklahoma. Arkansas, Missouri, Kansas. Colorado, New
Mexico, Louisiana, Mississippi and Texas. Should have wide home
town acquaintance. Write J. E. Woods, 103 Pamellia Drive, Bellaire,
Texas.
____ __
QSL-S-SWLS! Snappy service. Cushing, W1HJI, Box 32A, Man chester, N. H.
SELL: Signal Corps BC-41.2B oscilloscope, made by Western Elec
tric. In new condition. Make an offer. W7SXD, Dutton, 527 Cherry
St., Roulder City. Nevada._____
___ __________
LABORATORY quality test equipment. Urgently needed for cash. Overbrook Company, Overhrook 81. Mass.
QSLS. Samples for a dim?. Refunded on ordering. Narvestad. Gran
ite Falls, Minnesota.
______ __
__ ___
MAGNETIC recording wire for all wire recorders. Buy by the pound. Spool it yourself. Richardson, W2AOP, Box 96, West Brook field. Mass. ______ ____________
SELL: SCR522 xmttr. rcvr and power supply, complete and con verted $40.00. Scott SLR-F communication receiver. $50.00. R. H. Wickens, W2TPZ, P. O. Box 16, Eastport, L. 1., N. Y.
SWLS, QSLS. 3$ stamp. Harrison, 8001 Piney Branch Road, Silver Spring, Md.
FORSai^'H'aiHcrafters HT-18"NBFM. VFO. Best price o?^'$757)0. R. H, Brown, W5PBB, 521 Lincoln, Stillwater, Okla.
TECHNICAL Manual on Recvr-Trans. RT46/TRC10 with PE214B. Original. ISO pages, schematics, detailed instructions- $1.75. W3NB, F. Dunan, 1717 Lang Place, N.E.. Washington 2, D. C.
COLLINS 32V1 75A complete with Astatic microphone Workshop 10-meter beam. Will sell for best reasonable offer within 15 days. B, J. Kozak, Qtrs N-2, MCS Quantico. Virginia._____ _ __ __
FOR Sale: 150-watt. 15 ohm Ohmite rheostats, Sprague filterettes.
condensers, ten twelve-station interoffice Amplicall units, miscella
neous terminal lugs, and many other miscellaneous surplus articles
such as Lighting Plants, Converters, and generators. Katolight,
Mankato, Minn,
___ ______ ____ _ ________ _______
10-M ETER Beams, $19.50. Send Card for free information, Riverside Tool Co.. Box 87, Riverside, Illinois.
TRAIN FOR ALL TYPES
FCC (RADIO OPERATOR) LICENSES
Complete Raytheon AM and FM broadcast transmitters and studio control equipment. Also TV camera chain unit. 30th anniversary year. Send for catalog Q.
MASS. RADIO SCHOOL
271 Huntington Avenue
Boston 15, Massachusetts
Lie. by Comm. Mass. Dept. Ed.
125
The No. 69040 Series of
PERMEABILITY TUNED CERAMIC FORMS
in addition to the popular shielded plug-in permeability tuned forms, 74000 series, the 69040 series of ceramic permeability tuned unshielded forms are available as standard stock items. Winding diameters and lengths of winding space are l%2 x Siz; % x and H x VAt, for the 69041, 69043 and 69045 respectively. Nos. 69043 and 69046 have powdered iron slugs while Nos. 69041 and 69045 have copper slugs.
JAMES MILLEN
MFG. CO., INC.
MAIN OFFICE AND FACTORY
MALDEN MASSACHUSETTS
Index to Advertisers
Advance Electric & Relay Co........
, 112
Alliance Mfg. Company................
119
Allied Radio Corporation.................... 101
Almo Radio Company. ...........
108
American Radio Institute.............
110
American Radio Relay League......... .. . 91,94,120
Ashe Radio Company, Walter................ 103
Astatic Corporation. The..... ............. 119
Barker & Williamson, Inc........
127
Belden Manufacturing Co.........
83
Bliley Electric Company.........
80
Brook Electronics.................
121
Burstein-Applebee Company...... ......... .. 116
Candler System Company..................., 98
Capitol Radio Engineering Inst.. .......
95
Cleveland Inst, of Radio Elec.................. 128
Collins Radio Company......
2
Commercial Radio Institute................. 118
Condenser Products Company................ 77
Drake Company, The R. L...............
104
Eitel-McCullough, Inc.............
75
Electric Eye Equipment Co..........
98
Electro-Voice, Inc..................
79
Gardiner & Company... ................. 120
General Electric Company.............
1
Greenlee Tool Company.......
114
Hallicrafters Company, The................. 4, 7
Harrison Radio Corporation.................. 123 Harvey Radio Company, Inc......... ,....87,88,89 Henry Radio Stores........................ 99 Hy-Lite Antennae, Inc.................... . 116
Instructograph Company........
102
Jensen Manufacturing Co......... ........... 85 Johnson Company, E. F................... 106,117
Kato Engineering Company................
160
Lambda Electronics Corp................... 106
Leeds Radio Company..................... 109
Mallory & Company, Inc., P. R.. .............. 73
Mass. Radio & Teleg. School.... ........
125
Millen Mfg. Co., The James................. 126
Milwaukee School of Engineering. ....
113
Motorola, Incorporated.................... 112
National Company, Inc..
.... .09, 122,Cov. HI
New York YMCA Trade & Tech. Schools....... 121
Newark Electric Company..............
97
Ohmite Manufacturing Company.............. 81
Petersen Radio Company. ........
5
Pioneer Broach Company..............
86
Port Arthur College........
104
Precision Apparatus Company................ 82
RCA Institutes, Inc......................
122
Radio Corp, of America.................-... Cov. IV
Radio Products Sales, Inc........
121
Radio Shack Corporation.... ............... 92,93
Signal Electric Mfg. Co............
110
Simpson Electric Co............
84
Srepco, Incorporated.... .......
108
Steinbergs, Inc............................ 96
Sun Radio of Washington.................... 107
Telex, Incorporated............
100
Terminal Radio Corporation................ 105
'liming Devices Company................... 90
Triplett Electrical Inst. Co.............
71
Turner Company, The..........
117
United Transformer Co.................... .Cov. II
Valparaiso Tech. Inst.... ......... ......... 121
Van Sickle Radio Supply Co.........
118
Vesto Company, The. ..............
118
Vibroplex Company, The.......
120
Wholesale Radio Parts Co................
115
Wind Turbine Company........
114
World Radio Laboratories Inc........ -..... Ill
These handy B&W turret assemblies for transmit ters were the pioneers of their type . . . for, Barker & Williamson were the first to design and build a simple, quick method for band switching, without the tedious job of changing coils.
These turret assemblies are sturdy, dependable and easy to use. Coils are the famous B&W airWound inductors, another first in the electronic field.
Available from 80-10 meter bands and up to 150-watts.
Write for the B&W Catalog on Air-Wound In ductors and Variable Capacitors to Dept. Q-10.
BARKER & WILLIAMSON, INC.
237 FAIRFIELD AVENUE, UPPER DARBY, PA.
127
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ro (address
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CLEVELAND INSTITUTE OF RADIO ELECTRONICS
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City........... .
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128
PRINTED ÎN U.S. A. RUMFORD PRESS. ÇONCQRD, N. H.
The superb NC-173 with the'6-position crystal I.F. filter
plus the amazing new SELECT-OJECT A.F. filter
NOW! finer performance with d
One of the most satisfying characteristics of the
world-famous NC-173 -- acclaimed the finest communication
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A six-position switch, with crystal filter, provides the
broadest to the narrowest I.F. band widths. Now, an
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new SELECT-O-JECT described on this page in last
.«tin
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© 1ST
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*Slighfly higher west of the Rockies
NATIONAL COMPANY, Inc.
MALDEN, MASSACHUSETTS
OBJECT
ta
>24.95
In modern rigs power gain counts
· · · and RCA Beam Power tabes have it
This QUARTET of beam power tubes offers the mod
ern approach to compact, efficient transmitter design. They require less drive and deliver more output at lower plate voltage, than any other similar tube types within a comparable price range. In addition .. . the absence of high-level intermediate stages in a beam power transmitter is a long step toward the elimi nation of TVI.
What's more . . . these RCA beam power tubes are excellent for quick-change, multi-band transmitters because they seldom require stabilization in welldesigned circuits.
Newest of the family is the RCA-5 76 3 miniature . .. capable of 17 watts input (ICAS-class C telegraphy) to 175 Me. Its high power gain and extra emission make it a highly efficient frequency multiplier.
To get all the performance and life you pay for ... buy genuine RCA tubes in the familiar red, black, and white cartons from your local RCA tube supplier.
·
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Start the New Year right with the handy WAS Log appearing in the Nov.-Dec. issue of HAM TIPS. Your RCA tube supplier has a copy waiting for you.
RADIO CORPORATION of AMERICA
ELECTRON TUBES
HARRISON, N.J.