RIDER's PERPETUAL TROUBLESHOOTER'S Radio set service manuals - 1930 to 1954
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GALVIN MFG. CO.
MOTOROLA l'AGI: 7-1 MODEL Golden Voice
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www.americanradiohistory.com
PAGE 7-2 MOTOROLA
MODII. 50 Sc hema.tic
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PAGE 7-4 MOTOROLA MODE 80
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MOTOROLA PAGE 7-5
GALVIN MFG. CO.
MODELS 60,60,80, Golden Voice
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PAGE 7-6 MOTOROLA
MODELS 50,60,80, Golden Voice
Changea,Chaseis
GALVIN MFG. CO.
compartment and connecting the fila-
We have been advised by the manufacturer that intermittent operation of their Motorola Golden Voice models,
ment contacts of the rectifier socket, as shown in the accompanying sketch. One contact to ground as. indicated by
is due to low battery voltage delivered to the set from the car's battery. Check
all connections between the car battery and the radio set to avoid undue voltage drop in the car wiring, as the
OZ-4 rectifier tube will fail to start
and fail to operate on a battery voltage of less than 51/2 volts.
AFi<TFe LNQME
swFo reat._
The OZ-4 tube requires 15 milliam-
peres or more of drain to produce
ionization and proper rectification in
this tube, and on battery voltages of
less than 572 volts the plate current
drain of the receiver is insufficient to
provide the 15 milliamperes starting
current. Should the car wiring and
the condition of the car battery indi-
cate that at times the voltage may fall
5/ below
volts, replace the OZ-4
rectifier tube with a 6X5 metal fila-
ment type rectifier.
With the exception of a few Golden
Voice sets the filament contacts of the
rectifier socket have been wired at the
factory and the 6X5 rectifier may be
plugged in the socket in place of the
OZ-4. This will completely elimin-
OOSMFQ B4ifER COKQ
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Connections when using a 6X5 in Motorola Golden Voice set
the heavy arrow at the bottom of the socket and the other contact to the .5 mfd. condenser as indicated by heavy arrow at the top of the sketch. When replacing cover be sure that all screws are tight.
ate the difficulty due to low battery voltage.
On those Golden Voice sets not having the filament contacts of the rectifier socket wired, this wiring can be inserted by inverting the chassis and removing the cover from the hash
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www.americanradiohistory.com
GALVIN MFG. CO.
MOTOROLA PAGE 7-7
MODELS 50,60,80 Golden Voice
Coil & Transformer Connections
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TO TONE CONTROL ON MODEL BO ONLY
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CONTROLS
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MODEL "30
MODEL "60 MODELS "'80 4 G.V
OUTPUT TRANSFORMERS
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-8 MOTOROLA
Motorola General
Installation Data
GALVIN MFG. CO.
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www.americanradiohistory.com
MOTOROLA PAGE 7-9
MODELS Goldén Voice,5T71,
GALVIN MFG. CO.
6T12,7T38,7T47A,S-10
Parts Lists
Pan
No.
Deuription
nu= Special Accessory Group plume ARE
TO glen la!:
Lire Prior
PNa.n
WIT :OCT NOTICE IM
115
Doodad=
Peke
t tr
R. F. Coil /menu. Coil
,,,,
.01 Mfd, n.b.d. cond.., ...._____ .15
___ .05 if .003
MWid.aTlluabuClaraCdoend..e.mn
....._
.15
129 130
13. 131 033
--.- 8 Mid Elettrolytic Condenser
6 Way Renaud. or Wog
- Tel'.. 1.41.
- Pinto. Homing (K.5-3)
4 Ohm Flexible Who. Wound Resistor--
90
.19
..3.1. l
Control Heads
M -67A 1936 Pontiac Delos. bleddlioe plea and
11.
ts1.33-A M-68
M.66
M.99 M-100 044,
Film type control head with
Cadillac -LaSalle control bead end shales, plate and knobs . Oldsmobile control heed cad chelo,044.
-- Airpl»1 type
Small airplac
condo] imad type conuol
a:a head
du» eha-Lea
and
7.00 706
Medallion Plates and Knob.
M-14 M-13
M.»
M-17 04.20 M-21 M-29 M-30
M.31
M.31A
1934 DeSoto Medallion plate and keobs .-21.00
1934 Ford Medallion plate and knobe_..- 1100
193.4 Walnut Medallion pine cod
1.00
1934 Plymouth Medallion plate and knob, 1.00
1934 Packed Medallion plate and knobs- 040
Clamp mounting complere with kook
1.00
1935 Ford Smd. Medallion plate and
1.00
1935 Ford DrIstee Mcdallion plate god
knob.
1.00
1935 Plymouth (early), Dodge Meddliosi
place mad Make
1.00
1935 Plymouth (i.e.) Medallion Mare mml
M-300k1o93o5k.D.Sc. Airstream Medallion plate and
M-32
M.34 M-35 M.34
M-38
M -30A
M-39
1935 Owyder Aintreem kladallion MG.
.od kook.
1100
1935 Chevrolet bledallieoPina-Jd.
040
1935 Pontiac Medallioo plate and kook.... 200
1935 Oldsmobile Medallion plate end
knobs_
_......
1935 Studebaker Dictator »denim plate
and knob,
. 1.00
1935 Scudebeker President Medallion plate
and knobs
. 1.00
1935 DeSoto Airflow Medallion piece and
M.69 M-70 M-71
»72
1934 1930 1934
T/G1ei1llr1urMmek*l.eSutMiaelldioalnlic«plaptlaeatenadnednCdknkunodobbs»_s
1.00 1.00
Medallion plate and los _
..... 200
1936 Graben Canada Medallion p/ate
lad Iambs
M-73 1936Reomad Humana. ekddlien-Mate
Clod. end Make
1.00
M.71IA 1936
Airflow Medellioa plate cod
M-7811
kook
1936
Clod.
Airman
11.71S 6142 M-85
piolo cod kook.
1936 Chrysler Ailurcun
Meddel-a
Aire, plate and »ob.
1936 DeSoto
and Cantoor Medal:
Hoe plate »d knob.
. 1.00
936 DeSoto Deluxe Medallion plate and
knob*
1.00
1936 Nub "40» Medallion plate and
knob,
M45 M.»
1936 lefeyette Medallion plate and knobs_ 1.00 1936 Studebaker Pratideen Medellion plue
LIM M49 Undertim dash mounting and knobs
M-90
Oda OPO Steering P0.
outrol
umoky end
knobe..
1.00
2322 M-94 2156
me,
2154
11.98
2529
Standard Speaker»
i. rin apelike, only
...
. .33.25
dei.,...-co0w.r,L,Medm »Maim ---------650
..
4.25
under -cowl speaker complete
9 50
e- .oeocke, Icily
600
0 in. under -cowl aped». complete ..
5T71 Spealter--Chaput Trendormero-Speaker Can..
31 31-A 34 36.A 37 37-A 38 38-A 39 40 41
42
00990-D-16 Jemn Sp.».
7.1158 Output Tramformer for Won,
Trunk.» 1675-D.15 Jensen Seeker
M.105.1 Output
for above
12.A.D.16 Jensen Speaker
Z1154 Output Tr...forme for above
Truck.» 1513 Utah Slander
5237 Output
foe oho.,
Voio. Cone and Voice Coil Assembly for Jensen Sp.»: 00990
Coot cod
In Cone and Voice Coil Aseembly for Jensen Speak. 125011 .
Co.. end Voice Coil Aseembly Utah Sped:. 8513
Speaker Exchange Price
Motorola Model 6T12
W.311
1.65
640
1.65
650
2.10
630
-- -----------------1)..
230 2.25 2.25
122;
P801
No.
Descrier»,
IM
Put
Price
Decree».
104
PM.
201 Control Head leis Shaft »d CdO. ..........-$6.00
202 B. X. Flexible Shah 203 Walnut or Bladc Knobs
204 Keys (No 2178) Ends
- 235 .10 .30
205
.15
206 Look 60.140
.75
207 Steering Pou -Clamp
204 209
(»I) Volume Control (41-055)
Celluloid Dial
.
Lis.
210 Control Terminal Bernd
.20
211
Audio Assembly (A-72.1( wed C-1013) - 4.00
212
213
214
215
216
218 Cadervi Unit 5 a 1/10 Mid (No. 7063) LW
219 50 MW. Condemn _
2» Toto Soohol,
OZI 121 223 224
---- a. Poo
.30
00000325MMo. iC. oCoodoedoemme_r
15
Coaderaer Gear (014.4)
.10
na
226
227 !anion Housing
.30
2211 Antenna Cable 229 Coello) fobie
..
0.00
230
231 W Ocoot, Pohl.
.50
232
Speeker Cable
217
6112 Speaker.--Clutpat Tranajornser.-Speaker Comm
M-40
M-406
M-46
M.57
MM
M-59 M-60 M-61
M-62
M-63
dirk. knobs
1934 Cherdes
Medallion More
and 1935
knobs Chrysler
Airs.,
Med allim Mate
red-
1100
-...._-- 1935 PeCkard ^L."- Wedeln; Piktiand
19)4- 35 Hudson -Temple. Medal...
10.00s-i 936 »id, Medallion plate-Sod kook
1.00
1936 Plpeouth Medallic.. plate and »Me 1.00
1936 Dodge Medallion plan end knob, 1.00
1936 Ford Deluxe Medallion Mate end kook
m 936 Ford Standard 11 .1.11ioo 'a
knob,
1.00
- 1936 Packard "120. Medallion Mac cod
knobs
1.00
1044) 1.75
MW
M-87
ML.
Overhead Speaker»
1935 Ford ea -beet speaker cpt
3650
1936 General Mann type .r.level ranker
complete 1936 Ford type ....level awake.
. 630 .......6.00
1536 NultLehyette ope eer-luel maker
maniew
.......
630
1936 Gotham. 1939-36 Studebaker, Reo
oudele) eerlevel smelter opt.
6.50
Dual Speaker Combination.
M-92 Oho under -cowl speaker with General Motors type eudevel meaker-or-brickam
234 234-A 235 2354 236 236-A 237 237.s 238 239 240 241
P.O
M.1430-1 Output Trunfordser lot elk.
1676.13.15 Jensen Speaker
M.1676-1 Output Transform. for »e..
1491-A.D.16 Jena. Speaker
L1115 Output Trusformer for above
332.A.3.2 law., Speak.
CCZoo1nn1ee57=coadOuvVtop.i«ucet.TcCraoonuilsfAdoru.m..m.e.nrbalyf,oef0e0a0rbol>ev0e.0...0.0,
51.11», Speaker
1430 1674
Cone cod Voice Coil Amenably for Jensen Spuket 1491 .-
Cone and Voice Coil Amenably for
Sank. Exchenge Peioe
)..en
Sped..
332A
Motorola Model
7T38
Lira
Pat
- -
2.55 610
2.10
6.50
2.10 550
-
2.10 2.25 2-15 2.21
2.00 LIU 3.25
Lise
M-64 1936 Studebaker Dictator Medellion plate
umber
.113.00
No.
Description
Price
No.
Deuriprion
Peke
M-65 M-67
M.1
and knobs
Leo
1936 Chevrolet Medellion plate and km» 1.00
1936 Pontiac Medallion Mate and knob-- 1.00
M-93 8 in. undereowl tanker with General Moron ope eardevel meaker-or-back
Miseellaneou. hens.
Generator coodeuera
.40.40
M-26 M-17
301
Concrol Head Leas Shaba
302
OX -Flexible Shaft
303
304 305
Kne Did
(No Lighta
2(1N70.)
50)
306 lock .od switch (No. 2174)
307
16.00 2.25
lad, .30
.15 75
321
322 015 Mfd Tubular Cooderner 323 .003 Ockdllbo Co.doe.e1 324 04 Coupling Coodenaer 325 50 Ohm »unwound Resistor
526
.If -- .31
.21
M-2 643 1144 M-5
»M74
Ma »24
Iota of äoo
Dine het Man
In lots Wheel
of 100
Static Melon°.
Service Tuning »mks
Extensben service cabl.
N.)
Antenna capacity bridge
(eerily
30
40 so AO 32 model
4.95
M-21 MF.37
Of-42 M.44 M-52 M-59 M-91
»94
04.191 M.102 19)0
2423
1935 Ford engine con...timer nyountua,- 115 Speed shielded Ford 1001600 0010 cood....- .10 Low Ioas lead.in for 1935 »denote renal 1.25
Ann.». 'amnion box (mt., 1936 Dodge ..ei. eaten. moderwer........
1,
.30
199e Ford engine compartment moon.» 1.00
1936 Ford under marl motortieg __-...- .40
Pm Madam ("A" lod)
.por na. .25
3011
309 Cdl.dood DIcI (0.1)
25
310 Dial Lieu Socket
311
312
313 0. F Colle 314 Aell000. Coil
0.70
- 170
315 Choke Coil -Lemke Wound (7T -30A
Ordy)
35
316 Puskleull Truntiomer-Inpm (A-105-C)_ 300
317 A -105C and C-1092 Man. (71,34A Only) 640
310 A MM Condemn (No 1379)
.50
319 .05 Mfd. Condemn' Spi, Can (No. 1382) .40
327
322
319
330
(N. 331 Speaker Cable
651)
332 333
CAosnotro.l.
Cable Cable
.
(N.
954)
- 35 1.10 .75
334 Complete Cable dumbly (No. TrM)...__ 3.75
335
336 Tube Sockets .
337
330 2 -Way Renault
339 R. F. Plate mote
.10
Pan
No.
Description
Model Golden Voire
ue
Pam
PNar.a
Deutimion
Chauia
"B.' Poloar
Chases only -lese rube,
.. -445.00
2002 2003 Volume mount Malt support bracket
. .10
2050
2051 Z(Tntlev?roaN"??4m?0",.0r1100 bracket
2400 2401
»53
0049 Variable madenser drive gear (K -61A) .
V anode omdmwr ernmetare
2160
1023 2071
I» »73
.- 2075
20T7-13
_..- 2080
R. F. and with place Meke
Ow-inane coil (complete Io on)
Leo
I. F coil (cmpine in can)
......._.- 1.25
Diode coil (complete can)
1.75
2407 Standard mud tube sod». (nu, type)._ .15
2020 2021
2325
»30
2098 2115
2116
1.8
2404
2326 2259 2200 2411
1033
PVoeweer r.traammfoprmer
Friar choke (35 nadle) 3 layer hub choke
P0I1e1 Bloke complete in shield
Pleetrolym condenser 5 cod. 120 V. condemn
MOO mfd. 1000 V M W condenser
ova'2.`"4 T'""ube(as(1....'">"))
Onter Housing
104 Pa,.
3.00 10 70 30
55 450 2.50
40 is
1.7":
-- 7138 Speakera-Chaput Tranajormer.--Speaker Cone.
340 16043.15 Jansen Spedur 340.A M-1649.1 Output Transformer for clone
341 8307 UM Spe,b.e 341-A 5240 Output Transformer for above
342 8517 Utah Speaker
---
6.50 210
6.50
34LA
2.10
343
1225A-D-16 Jensen Speaker
343-A Z-1153 Output Teeoe
for above
6.50 210
344 483A-D-15 Jenne Speaker
230
344.A Z-1056010091 Transformer for above
2.10
545
1471A-D-16
SP.».
8.00
345A 346
M-2217-1 Output Cuse aed Voice
Tomformer for above
Coil Assembly for (left.
Sp.ker
1649
2.10 2.25
Cone and Voice Coil Assembly for Um), Sp.ker 0507
235
Sin Cone assrl Voice Coil Amenably for Urda Steelier 8517
349 Corse and -Voice Coil Amenably for Mien Spook., 1225A 550 Coo. cod Voni Coil Aomlbly lo. ne. booboo 403,6 351 Cone and Voice Cal Amernbly for jeman smoker 0490,6
Spesker Replacement Price
2.2.1
1.25
-
2.25
_Ledo
225 335
Motorola Model 7T47A
2408 6766 wan (special 0.7 peung)
.15
00'4 »35 2038
1942 2409
-__ Zany reeeptede
Elimiende.nd dusk »pre .
Grid cape for metal lobes (per dea.)........
.15 .25
35
2410 .00015 mid. type "Ce. madman
15
1039
.15
24111
1042
-PO
1400
1403
A2
2251
A5
2252
.20
2254 0016
- .1 odd. 2130 V. madam«
.15 .15
2264 2261 2175
1. .15
.01 odd 100 V condemn 0.111,
2276 2277 1777
---- redo.
.02 mfd. aeo V. condemn as mfd. 120 V. modems Retinae (state valor)
.20 AS
2095
2302
2167.A Tone control
lob. 1303 Sensitivity control .
2170 Ton. morel
00
2300 23011 2309 2419 2120
1.0
2018
»19
2017 1172 2171 1995
29.
2331 2332 2333 2175 1300 1301 2151
1797
2154 2421
bledelhoe plate
B.h.?cia?crysc?'
Cuid plug button (large) Gold plu, bottom (medium) Small gold plug b011001 (small) >hp 00000111e 900.0.11 Set moaning contact wiper Set mounting sods 5/16 y. hex brad P. K urea. 5/6-10 bet steel nuts (self locking) Steel washer,
Speeker
Speaker oids-enie page 1.
41.00 2.00 175 .n3 .09 .03
IO oS 05 09
7 prong cable
.
35
oud.20 Smell po Peta,
LShoogretmFscpooeuarnting
-
.08
Loo1 .p.okn f0101100 .11.1
.30
=2:41 21/2 ia reel mailers
in.-16 her bead steel nuts (pee do.)
Sprl,am block (for.
.
.05
.25 .10
Co.. cod 00100
0-29
NOTE: Due to the fan Mat speaker cones cannot be
repined b, be service mu in the fseld. it will be near
easy to care dl awake. to 00 for lervice. A 60
6e dc
and »vice .0100.0100to the above
100e
Pan No.
401 402
4.403
405 406 407 408 409 400 411 412 413 414 415 416 417 41. 419 420
440 440-A 441 441..A 442 443
Descriptino
Control 01e»
.
BXFlexible Shaft with Film Piano -
Ke* Dial Light.
Lim Price
116.00 . 2.2/
as
.15
Pan
Lin
No.
Murrains%
Prise
421 422
...30 .25 Mid. Condeneer (No 1471)
An
.1 Mfd. Condenser in Co. ..
423 Muter Resin., Strip (1.11 50.110)
.55
424 Muter R ..i .. nr Sari, (350-300.213) ______ .40
475
Volume Coomd (No. 290.8) Celluloid Dial
. 1.00 . 35
426 427 42.8 429
,einion Housing
(ransformer (No. 1681-B) ..-..-.. Battery Cable (2 Wirt)
30 430 100
430
i) Impedence Unit in Can (MI L
. ..... 200
431 432
R. F. Coil.
1.00
433
Anteeria Coil
40
434
Choke Coil
- (VB..) OsnwMefnd...30CeViol lt-
---
Elec.
Co--o--de- m- er
.........
-- ----- -"e
.75
435 436
Can40 .s-5 Mid. Condeneer. in Can (No. 1379) .. AO 5--.25 Mfd. Condenser in
41'
(No. 1406)
. I.»
439
Amen. Cable
..0
Control Cable (5 Wm) ...........---....- 1.20
Dade Assembly 9-pt. with CA& Homan, 210
..05 - 9 Pm. Plot (Male 1909-J) .........- .....- .50
9 Prong Sate. (Female 1110P1)
30
'e.t.a. Plug (No. 1902)
dOeoo
(No l02)
10/24.23/4" Set Bola
7T47A Speakers -Output Tran.former-Speaker Cone.
4Z-0831-D5.16500le.mes»TrSapnesafokermr er for above
2324-D-15 Stud Mol.00eo Jenun Speaker
---_-________ 2.60
4.58
Speaker Replacement Peke
Motorola Models S-10 and H orne Seta -1933
Motorola Model 5T71
Pan
No.
Demise»
Lim
Put
Prior
No.
Deuripeine
List Prize
Pan
Lim
No.
Dncriptioo
Peke
101 102 003 104
---$6.00 AA Control Head less
cod cable
BX-Fl.iNe Shalt Dampier, __. tIteleut or Black Kula
2.35 10
-. - Keys (No. 2178)-Fads
.30
105 106 107
.-.- Dial Lights (No 50)
Lock Switch (No. 2070 Staring Pon [Loom _
15 .75
30
11111
109 110
Volume Control (4.1-0653
_--.- Celluloid Did _ --. Venable Condensers ..-....- .. - ...
--. Audio Choke (A-20060. C.1013)
000 .25 3.50
135
put
No.
Dmription
119
Laa peke
122 123 124 125 126 127
- - Aumso Cable
_ _
Control Cabk
Sate Value Speaker Housing
5X-1 Mid. Condenser (Na 7063)
_ - 35
1.10
15 200 100
1»
1150 1151 1152 1153 1154 1155 1156
1.7
115. 1159
0160 1161
.. 3 Gang Variable -Caidemer (R.175.A)
5.00
lo MM. 20 Volt Ekrinalnic Coodemer......
3s.o8 ,VVoluoml.e,.
Control Control
5014 Ohan (11.20113)-
500M Ohm (0.I009)
1.10 1.00
SAO
S-.
Sensitivity Control (R.1008) and Jrt Tone Control (13029)
.60
20 Fr Remote Contr. Cable (R-107).......... 250
Sat. Lath. Remote Control Cable (Pee FL) .15
R. F. Plan Cloak. (RC -115) -
SID and 3.8 Antenna Coil Complete
.141 R. F. Coil (-neat.. (AD -111)
Ao
3-10 R. F. Coil Complete (RR-111)_ .....
117 3 S-10 Electrolatic Condenser (0.10on) _ 2 no 1174 25 Mfd. 5-10 Electrolytic Condenser
(R-2510)
1175
.15
1176 Bakelite Cop for Serra (7101
.15
1177
1 Ana. Fuse (7AG) .
10
0178 Audio Transformer (0392.K)
150
111.709
Power Transformer (2401) Filtel Choke (1067-U) _.
ISO 110
1181 1182
(t. Filament Transformer (2399)
12 Mid. Elecrrolytic Cond.
III,
. ..,
rs
1103 Choke CO for .141 (No. Ian)
1
IM,
11114 Magnamx Speaker (R2ADC)
966
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-10 MOTOROLA
MODELS 11.33 Idm333A,34,Dual"6" ,
PRICES ARE SUBJECT TO CHANGE
Twin48",44,Buper"6" , GALVIN 31I11G. CO.
WITHOUT NOTICE
60,3-484-64,1458,85,57
Parts Lists
Ila
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
NPart
1681 1662
622 M69 4.49 M.50
Motorola 3-10 and V Models
J-0 OwBator Coil Complete (AD -112-22) .75
S-10
Slo
drillemr
1. F Coil
CCooiml pCleotmepl(eßte1(2ß01-131)2.)-_.._.
JO 1.30
Home
Iles S5ppeeScete-1933
resCPoanut.) Tram
1116
Magnavox ConemeDeC nd
A,ebl> 2.05
1187 Role K-7 Speaker (RR -7m)
.12.0
JJa 1. F. Coil Complete (Aß115) .._.___ 1.50 J* and S-10 Diode Coil Comp/ (Aß114) LSO Sao.! Wood Kroh .............._.-..._._.__ .I5
1Il1l2s0
Spee. T-9452 Robe 0011,01 Transforma Rol. Cone ad Voice Coil Auembl7.
145 3.25
1190 1191
N M
r
bine
....._. _.....13.0
Remote Control Camera J* er 5-10 _......_ 3.30
1192 Slo Amplifier Cabinet
_.. _...... ..1e0
Tmulitee (41036) ..........____.-..._...._...2.50
NOTI, BrnlrA... Pta". Did! and diner Na Lmpo
14 ElectrolyticCondmrr (141632) ..__. 540
d9w/rslr.
M-33
Description
List
Pat
Prim
Description
W
Prim
1935 Film Type Control Head
1624
1608
Model 57 borúonul dial sole .... ...... _8025
1606
Model 75 horizontal did sole Model 100 horizontal dial sole Model 57 venial dial silk _ .
. 25 _. .25 ............ .25
1604
Mí4
1654
Model 75 venom did eerie
25
1807
Model 100 vertical dial ade ............. .25
107
M-33 A
Celluloid indicator Mm shad ......_............ .25
Moh o,! rat gear
Toeing daft and driv. worm Gear .........._ .30
Low Ira. lead-oe _. ..
....__.......... 1.25
Due generator
Dial
dsumbl complete hen ails-_ .30
Pao.
Deuce,.
Lia
Prim Nm
Deavipti08
him
1936 Panel Type Control Hand
2223-A
2223.8 Did lien geld (blue) ......__
.10
3211 21 213
2214 2215 2221
Celluloid renal
2227 Film tendon spring
10
2228 Sprocket holddown spring ____....
AO
_.
_.. .15
2225
220
1007
159
Tuning shat 25 x 13/16 in.
w Volume control abaft 26 7/16 h.._. 0 No. dia ligote (6/8 .cal) _._.._
Klexible shah Mordp p
.......
IAo
._.
.e5 .1
2222 Diel finn snip
....
.. 25
1759 Di218
(per d )
..... __._ .1
2213 Did
shield (gran)
A. OO
1207 Dial light sremMY fer bulb ... ....._._._. 30
Motorola Models No. 34-Dual c6"-Twin l817
Pue
No.
Desriptoo
La Mot
Prim
Dealeipdm
La
Price
No. 34-D "6"-T "8" Control Unlit
Coal Is 1001-A
1001-B
No. 34 Du.ló
Coud
Heed Heed
Complain, Complete
Shafts 4.00
Ire shahs 4.25
1001-C Twine Coowl Heed Complete leu .halte 425
1002 Mir Flexible Shah. Complete ... _.. _ ....Pr. 2.00
1003 1004 1006 1006
Tone Control Knob ._. _.......
13
Key K6 Knob Key Knob -Volume
_
Key. (Par Pa's)
.. _._. _._ .13
._...
._
.. ____
.IS 33
Bulb)
1008 10164 Io11.4
1011.0 1011-C 1011-C
1013
1013
1014 1015
Dial Crystal
IS
Dal
Nad
N.
6
34 Volume
anDdidTwWil
Vrawl Control Volume Crawl
..........
(
(Kin)
... _
1.00
L15 .15
Dua6 Dol Plate ........._.__.__...._.._.._..... .IS
_ DD.ieú-G9 uDoGeeaRr alao
Beal Ring
..
....
Variable_fe._nd_.._(K_-_61_)
Hia Light Assembly Campline ............
.I5 15
.10
.30
Horse slave Wehen _.._..______......._Dm. .Ss
No. 34-1) "6"-T "8" Chassis
1017-4
1017-B 1017{
Model No. 34-3 Gan Variable Cad..... 2.50
-3 ßu1.6-3 Gang Variable Cadeº,.,.......... 2.50
Twin -It Grog Variable Condenser ........ 2.50 (State Make of Condenser Men ordering.)
10184 1018-8
Model
D I6
34 Antenna Coil Twin SA
Complet in Cao. Cod C4). m Cm
.60 .60
1019 1020 1021 1022 8003-A
i R F Coil _..
.......
.40
OsdWtor Coil
____ ...___. JO
1. F. Coil ....._..-_....
...__. 1.30
Diode Call .._. ................_.._.__....._..__._ 1.30
Ram Cleob-H.elmd Type
"6"-T 34-D 4425-B
No.
Rue
Cleoke- 0P.o"8Typ'e"B" Poker Unit
1055 Twin -e "B" Power Unit Complete ..._,_._1100
1956 1057 1058.
-- Dual -6
Power
"B" Power Trans( (D6
UsniTt *C)om(N.o4.,,255. 2)_-122..0500
Rorer Ttwfowmer D6) (P-2S34)
2.00
1059 Pow. Transformer 6) (42534M5).__ 215
1061
PRoawdeiar l TrVainbsrfaotromrserM(.M3-34(NOanl5y)26(94A2)463.)_
2.00 4.50
1062 1063
ElkonoRadian
Vibrato<eS bDual6 (No. 3399-a1 1ío
1024 Padder Gonda., (100 MMF) Ad Modal. .50 1025 .2 M1d. 200 V. Cadets, (101) ..._........... .20 1025 .2 MM. 100 V. Condenser (101)............ 10
1026 1027
.0 02 MM. 300 V. Condenser (023) .. -.._.__ .1S
25 Mfd. 300 V. Condenser (102) ... ._.....
1029 .01 bi/d. 10 V. Ti., Ta Coedewa (100) .12
1029
1030
1032 1033
..15 .05 Mfd. 400 V. Condenser (104) ._ ... . .111
.02 Mfd. 200 V. Condenser (I05) .
... .IS
.02 Mid. 400 V. Condenser .1 MM. 300 V. Condenser
(106) (107)
......__
.15
1034 .01 MM. 400 V. Condenser (14) .... _.__.. .15
1035 1036
.. .1 MM. 200 V. Codensa (114) .. ........_ .I5
.01 MM Padder Cmdmur (loo) ...
.2S
1037 .007 MM. 500 V. Tubular Conhv.er (141) .20
(Replaces K-140)
1038
1039
1010
loll .0005 MM. Min Condenser .
.I5
1042 1043
- .0005 MM. White Dot Conde .a ........._.. .20
Retina (Stare wen)
.2S
1044 Tan* lout Audio Choke (0361-A) ....... 1.0
1045 Twin* Outset Transformer (2551) .........._ 1.25 1046 Twin* Input and Output Assemb. (10707) 2.50
(Re -plea No. 1044 and No. 1045)
1047 Variable Condenser Adjustment Cam....__ .10
1040 Variable Cad. Adj. Co, Guide Brada .10
1049 Variable Condenser Tension Spring ....___.. .05
1030 7 Way mania Rug _. ____....._...._......._. .30
1051
9 Point Solder Lug Strie
_ .. ................_ .10
1052 1053
- Deli z Wu Speaker Receptacle
(No.
1802.0
10
1054
0wPl oSintpiSvold1e4-r3l4ag Strip wit To.. Ca - 19
104 Dual-6 Speaker Plug (No. 2902) .........._ .10
1095 8094
Co. Frone Cover Only M-34 (No. 359)... _..._ .50
Front
Cp4 feu Speaker M-34 (539) 1.10
1098 1099
1100
HDas,t
Wifpperprs.Ssuumpsp-3 yea, Strip -1 Termminal
N-oP. r1D73m1_)
(No. 1720)
ió
.10
1101
103 04
1104 1105
T"Aw"inMeeHteorm) inCgabTleer(mYienlalol wS)tripD-(6Noa.nd17T424)
fit "A"
3 re
A. 51/2 'F;t't.
Cable re(Bblalcek)
'e1.4
D6 leb,
and No. D6 and
34.._
T*
.13 .20 .15 .25 .35
1064
Filter make able D-6 and
T(5*1)35_-2_5..4..3.)....._(l.n..n..r..a..4....n..g...._-
130 .70
1065 Filter Choke M-34 (No. 4430)
1066
107
Filter Filter
Block Block
floar
Twio-2-(No. Dual -6, (No.
e6032256).)____._._
1.110 1.75
1060 1069
Filter 77-E
Nord 1.010,
MW-3o4un(d64114MH..a..sh
....__......__
(]e k. Ar
-
_-
1070
eensbl Dud 7).E
attire Wm,
B^
Hab make
25
.50
1071
.30
1106-B
1107 1106
1ID10I9
1119 1114 1114
Antenna Ind M -N (Female) ._._.._....... .20
solder Lug Stlfp
7 Way (]. Sadh
3 Pt No 34-44 and T*
Receptede .
.10 .50
(ill) 1. Wry Anteaa
e ._......_...._.._. .10
.004 MM. 300 V. Cold. ad make
.25
.01 MM 300 V. Coud. ad Choke (112) .25
..00015
MM Mid.
Rd Dot Condenser,Cond....._ Yellow Dot Condenser ..._..._._
.I0 .20
No. 34-D "6"-T "8" Spank...,a
1072
.30
1073
.30
1074 1075
Elkay Sghock Absorber R
.20
Riaó4
AO
1076 1077 1078 1079 1060 1081 1061
103 10e4
1084 1065 1086 1007
1063
Plug Power ack
10
Radian Vibrato0r Soda _..__.._..__... .10
Mallory
e SockEelt _.
.IO
.0 4 Wat Flhell f9 Type Elk.RReeccaepn.t. (711)) .25
Bak.hte Shell for Elkonde R[[cce4). (716)
M .0
110
.01 MM
VCo0lt8CdomndWCenos(en1<2.67(13 ()
.25 .25
.5 MM. 120 V. Tubule Cpondenu ((116)- 22
.5 MMid. 120 V. EliptiElecol Cis Cond. (16).... .25
3 Mid. 11 0V Condeno Cod. (116).... .25
.52 MM. 100 V. Condenser (141(1._._.... .20
.0 MM 120 V. DzM.5.01
sube Cunden.,.
ViB. uffer
(127).... (111)_
.23
Dud .S-.ol Mfd. Uodman (109 ot I19)
No. 34-D "6"-T "8"
Outer Housing, Cable and Filters
1090 Rnr Cover Mr
...
...... .50
1091 Fun- Cover for Twin*
..... ...._. .40
1117 Throe Speaker Shod
sod..........._._ .20
Il10 Twin! s
L0á Meal. sud....(._._4_) .75
1120 1120
Told Model 3 serum RoleSls s
JensenMage
Rohs
55-346) 3.75 (06(3)0._ _ 150
M. 1121
1122
TTw* inS*poMkaegnaCvpoxt
or R in
Huaspnegakewr (iKt
MR
1124 1125
Balte
wit SpaC Cpt.Cover
Coran. Plug 5.00
wit Front Cover
Speaker and Rog 5.00
1125 Model 34 Output 1126 LIo33 Da16 Output
(er____.._ 1.0 115
1127 1129 1129
1130
OutpGlee
Mr Transf.Voice
(See
w 1015)
Cam, Vola Coil A.
foc Mad. 54 1.60
Done Cm and Vola Coil AremMl for
bud 00 Care and
200
Coil Aural,
1131
130,14 .__.... ... Rdlo Co.. and
c_o_s_.a_u._r_a.l_,.
1132
ai Twin*
Mope f or T
.*.__C__o_o........!...v._o_i.e._..
Aortae
_..._.
Md.! 54 SSpoeaakker 6plaaemmt _.... ..._. I215
1092 Dual -6 Eck Co,., 1093 00.1-O Fron Co,.,
.....
_... .30
.50
Model Te Speak. Replacement
... 4.10
Motorola Models No. 44 and Super 446"
Part
No.
Description
Pleri,n
No. 44 and Super "6" --Control Unit
- 901 Control Head Coraplerc
...............16.00
902-A 32^ Flexible Shaft (Model 44) _
3.25
902-0 36^ Flexible Shah (Mold S-6) _.. _..__ 3.50
603
nub Spring .. _...... . ................. .10
906 Cave Goa CryaW ..... _...._...__............ .. .25
9098 910
911
912 913 914
Did Plate Udoriel 56) _._._.._.........-... .15
a SCpoencdieanl seBrleGdearK,nhobalite ...._. _..._._. _.._
10 .5o
(Sate Coarse Pine Tooth)
Keys (K*1)
..
_
_..._._.-Each .20
Did Light (No 50)
Drive Pinion ..__.. ...._._._._._.._... .20
Part No.
920 929 930 931 932 933
934
933 956 957 950 959
940-A
Daa(pda
Lim Proa
.15 MM. 30 V. Tubular Cond. (No. 100) .20
01 MM. 300 V. Tabula Land. (No. 1741) .1S
.05 .05
Mfd. Mid.
400
30
V. V.
TTuabbohuelaGCoadrnd..
(No.
(N.
1999) 1972)
.15 .15
01 Mid. 400 Volt Tubular Cadman....._ .15
2M -0M -20M Obm Caodabm Resume
Mo. 422oÁ) ......_
._....
.30
2M -20M-20M-270 Ohm Candohm Reaoamr.
(No. 4422) ..__._..._...__.___..__ ............. An
Any 0040, (Sale Ohmage) __......1020_ .15
10 MMid F.
Caodeueoaer (No. 1020) .50
1 Wu Rug ...................._...__........_... _.._.. .10
No. 44 rad Super "6""13" Power Supply
44 Pow" Pack Cpt. in Cm .kiki Cover.. 1240
Motorola Models No. 44 and Super
915 500,000 Ohm Volume Crawl (601-C)._ I.00 916 Dial Ligln Soda _._... _..__.__..._.... . t5 917 Dia Light Assembly Complete .__........_. 30
910-B 941
943942
No. 44 and Super "6"-Chagsis
945
918
2 Gang Variable Condenser (4 24)
_. 2.00
946
9194 Modal 44 Antenna Coil Compiete in Co..a 140
947
919.8 920-A
Model 5 -6 -Antenna Coil Complete io Cm. 1.00 Modal 44 Oscillator Cod ample. in Cm .90
948 949
920.8 Model 36 Oscillator Cod Complete in Can .90
950
921
1st L F. Coil Complete in Can....
..... 1.23
951
922 Sod I. P. Coil Complete io Cena__
_.. 115
923-A Modle 44 Dirle Coil Complete in Can...... 1.00
932 933
923-B Model S6 Diode Coil Compel, in Co..... l-00 924 .0005 Mid Midget Min Cadmeer __.. _ .15
954 995
923
Alum. Tube Shield and Bue (No. 01090)) .20
957
926 Audio I. P. Train. (No. 2311) (S6 Only) 1.50
957
927 .1 MM. 200 V. Coodenrr (No. 1669)....._ .15
Outer Housing, Cable and Pilfers
978
959
964 Model 44 Front Cover Cu. Ira. Speaker
990
960 Model 16 Front Co,., C4). leu Speaker._ .40
981
961-A Model M Bed Co.a ............ ......__....._... 640 96960B Model S-6 Back Co,,. ___...._..._..._._... .40
981 903
2 Way Receptacle (J.1102)._.___..... _. .IS
963 964
Mima 4 Way Receptacle No. I001-C) ..........._... .20
Rug Shield Assembly .__......_... .35
954
965
Polarising Receptacle (No. 1825) .........._ 15
905
966 Cable Terminal Seri (2.T) ... _....._......... .10
967
B.oery Cable (Black)
......__ .1S
968 969
Speaker Cable (S6 Only)
Antenna loom in Running h Lengeha, per .10
967 988
970 3V P,. Amen, 5111.11.! Loom __..._.._.. .35
971 972 973
94
B5 Dra Candeoub Min
....._._...
C 25 Mid. 160 V. Tubule, Coed .. _......
tin Did
20 Tacna
NFi.lter12
Cooke
Win
and and
Coodmur ... iowe mote..
a Need "A" 60.07 and Power S.Case
.IS .m
.25 .m
909 990
991
992
973 976
26 Taros No. 16 W. Hub Eliminode moto 20
Volume Control Bruin 00M Spring for Sb.! Cane
(Nn.
.10 10.C) M
Model
45095
"6" (Cont.)
wit=-244 S6 Power Pack Cu io Cu with Cover..
mm x Way PluP -
..................__._.._- ,30
TM orl70
Elkoo
en
e
C
9.50
Cudbard CmsGm
with lads (Model 44) -................._.__ 5.75
Poona, Transfo mer (No. 2230) (44 O.1,) 3.255
Power Transformer (No. 2270) (16 44) 2.25
_ Power Transformer (Utah) (Nin 1092)..__ 1.95
Filter Choke (No. 20609) _..... _.....
1.0
Püte, Choke Coil (Uab) (N9 4267). __ 140
Aehy only for T.35 PJkowde ....._ _._.__. JO
0/12 MM 300 V. Electrolytic Coud. (0123) 1.30
Pp.m .M 0/4 Electrolytic Condmur (No. 040)._..... 1.20
4/6 MM. Electrolytic (Comb) (No. 46200) 2.00 .S MM. 160 V. Tubular Cod. (1784)..._._ .30
.01 MM. 1600 V. Tubular Cad (1789).. .40
3
R P.. Choke
C in
Cw- .25
.
-.. S6 Speakar HouenO fb^)
Lealur Grill b for S-6 Only
... ._' .75 --- .40
lace Soaker Std ............._...........- .30
Thumb Sinew for Model 44 Speaker
Sind Amiably on Iron cover
_._.. ._ with plug
.10
connector complete ...........__..._.........__.._. 3.75
S6 Speaker io Flouring with Mtg. Suda
and Gol. Completo ........_._....................... 630
Utah Model 44 Speaker less 0. P. Trend.
54 -4,13 Utah SPeah.ollako.. ((Lm
(63.094 á30o
la Output Trasformen 44 (No. 7121).... 1.25
000FOt Trend. for 3-6 (No. 7202)----------1.50
Coo,-_-- Coot and Voice Coil Assembly for No.
.....__ croe and Voice Coil Atumbly for
vote Speaker
___ _._ ..
IJO
tool Voice
Asrmblf for No.
4410 Spea.._._._..._..._._..._........_._.._ 2.00
44 Spea.kker,, Replacement ......._......._..._..... 4.25 36 speaker Repite:mot _ _ .. _..._........... 415
Part
Nm
2349 2345 2050 m53 240 2054 2336 2023 2339 2073 2074 2340 2337 2320
2020 2021 2030 2316 2315 1508{ 2404 2317 2116 2272 2259 2033
2341 2342 1500 1792 2016 1019 2017 2171 2172
Part No.
1201
1200 3
1204 1m5 1206 1207 1208 1209 1210 1211 1212
12144 1215 1216
317 1219 1219 Ixzo
Part
No. 401 602
6604
713 606 607 608 609 610 611 612 613 614 615 616 617 618 619
Deuriptim
Lim
Part
Price
No.
De"riptiom
Chassis
011.s4 only -lue tubes
...121.50
Tube .lucid
____
. .40
Venable condenser maunun/ brada _ .25
3 gangg variable condenser
.. 3.50
Variable condenser adjustment cam ..... .05
Shoulder screw 6013
Variable condenser temfa suing
._ AO
coal Volume control
........... 1.00
Volume
funnel __.._......__... _....._ .05
m) I. F. mil (complete in
.... ..... ......... 1.25
Dirle coil (complete in can) .. _ .................. 1.50
T'B" Power
Transformer an bam Vibrator. holddown camp
___.__ .10
Fiber lake ......._._.___..._..._._..__... .60
Power wadenea
2.00
Power Joke (complete in shield) _._......_. 35
Vibrator......_ ....................._.._......._............-- 130
3 layer hash choke ......_.___._..__..........._. .30
.01 ad. buffer roodeoser _._...._.._...__. .23
.5 dol la V. coaminr ......_....._. _ A0
Outer Housing
....41.73
Rug burine (bag.) ....._.
._........... .03
Set mounting catan wiper . Set mounting bolts _.
.10
..._..... J]
5/16 in. hex kind steel nuts
45
5/16 in. x Y m. Ff. H P R screw...... .05
Models H4ew5-G-er4ew
599 Giu.tobe sockets (sum lyp) ...
.10
2402
.25
1815 1777 1039
iá1
2269 2252 2255
R.obmn (ate value)
...... .15
0001 mid. MT codenur
003 0003 m MT codenser
mid MT condenser00
_ ..._ .15
.15 _.. .15
m/d. 400 V. condenser
.. .20
V.. 057 midmid 400
piing condenser
wít of
100 mid.
V. condenserragterra
500M
ohm resistor and wanting svdp ..........
2250
.15
2258 25 mM. 300 V. condenser
1403
2254
2251
Speaker
Speaker oelyy
23]3
2323 2321
3GdrilKlmron.e........._..._...__
.d 2319 Grill doh ..__.____
2425 Cone
.oint nord
173
NO Field coil
...._._.___._.___._ 240
Speaker replacement .._......___.......__.._.. 240
se,. NOTE: Due to de kin dut
replaced ry to
tbeynth,eetaerv.itcaekemnan
in co
teunfkieeld,
us for
it
be
will
be A
n...s drop
will be made for peu ad service according to da above
rate (1799160).
Cables and EliOninode System
2331 woke mil (ename win) - __.._ ..............1045 2335 mote mil (enameled wine) ......._..........__ .2S
2119 Speaker voice coil chat ....._.__..._ .0
35
1403 .53 old.
V. *4.,.roamer ___.__..
.15
2270 2270
2310
.5
220 V omden.er
6 ofd. V condenser
600
udder mdmsep
...
.40
._ .13
...__ 2511
2576
Wale prong dial
receptacle
Small prong =antaimroa renptede
___. .10 .75
2417 2416 2416
W-58
Antenna loom complete 30 able c plan with fuse
-1934 30 ampere feu
Home Seta
.... .75 _...... .40
_.... .os
D...iP421
Lct
Part
Pola
No.
00.¢09908
lìu Rin
(F. 2 Gang Variable
G54 -W-3a) (No.
5-456) ........_. _.._..__...__.._-._.__.. ._....
2 Gang Variable (For H63) (No. 524000)
La
2.0
VVooll.umCeraCwol u(d0.3(H4--4W5)-3(5N)o.
(No. 3100).._ 4330).__......
140 140
------ Tas Control (No. 13037) -__.._....._......_... 40
PFEoletwtcertrroClTyhtoriackesCf(ooNnrond..rr0(S4(4N]34o-C.-)W55-2332) )
2.25 .50
(5812).. 2.50
lylic Candeasen (H63) (No. 4310) 2.0
I. E. Coil Completein Can Dinde Coil Complete in Co,
(N(No.u4453-L-)D__)_....
1.30 0.30
Coil Complet Cano (No. 45-A) .55
R. F. Coil Complet in Can (No Oscillator Coil Complote in Cao
45-A).__ (450).._
.33 .70
1 Mfd. Mica Condenser .5 Mfd. Condenser (126) ....
1i __. _ .............
......... ...... .I2
1221 1222 1223 1224 1226 1226 1227 1229 1030 1231 1231 1233 1233
1234 1235
1236 1237 13211
.25 .05
MM. MM.
Co.deosr Conde..
(-1_7.7-3_) --..._..-..___.._..-..
0
.
O
.__..._ yloRy Bier Coa
.10
Dril Any Resistor (Sa vNanluee)
-....__-_._._ .10
Soon Ohm Rd
-45r 10 Wa¢___ .30
A. Bohm dsd
(
1.0
Co Cord and Flog o, H1 (00-7)).__ .30
To. Soaker for H65 (T-467)..._ 3.30
Chinon Transformer Mr Same (T-467)(4 __. 40
r Cae and Voice er
0463)__ 140
(^ 05737)4-0-0-1- Speaker fo- r (G04 tend 00.50)
6.30
Output Transform. for Same (T6/0 -A)_
Cone and Voice Coil Amends (G-94-
........_..__....__........__._.._._ 215
Kanaoba for His (No. 259260) ___.._Mr .23
Krabl for G-54 sed W-58 (No. 237)_60) .10
Celluloid Dial f0 0-54-0730 (Na 520) 10
Motorolal Model No. 55
Dano9ìa
lia
Pane
Prim
No.
Daaipliim
MLibu
--- Cooed Had ........._...._...._..._.__.. _._..._4600
Flexible Shah Complet rods Pink.
3.50
D Clutch Sp
Shielded
...
._ __ .
... .10
Light Win Cp. with Dial
Volume
Crawl ..._._____-___
.50 140
2 Gang Variable Coodeneee
. 2.00
Antenna Coil Complet in Oscillator Cpil Cpt in Can
Cwanit
.64. Lade Leda..._...
1.00 AO
- I. F. Trw(9((me, Complete io Can _........_ 1.25
Diode Feed. Complete in Cao _._ ............... 1.25 Resistors State Valne .......__....._........_... .15
.0005 Moo Condenser ....._......_._......._.._. .12
.01-2110 Voll feria....
.10
.23-160 Voh Cadendo ....._..__........._.._. 20
.01 Mfd. 160 Volo CCooanddom, .. ............... .IS
620
621
F 622
623
(N Terminal Strip10
Ter
.
624 625
N.Power Transformer (No. 2149) 34 Elkonode .. .....
_..- _ ...._ 240 5.75
Hu 626 Power Pad Aseembly Coo
-12.00
627 Dud 0 Mid ecolytic Coalmen ......_. 1.50
628
Mid.
ogle Condenser..
L30
629 630
gß93. 0bPikeEl 41-1600 V.
CBhoMk .
Coodmw
_....._.._._.
.30
631
.23M ^A^ SolenoidVol,C.
M Soo0 dt Condoner
_._.__ 35
Memo Cable
"A" Coble -3S lead Shield ..__._........__. .00
635 5/16^ Oval Heed S. Mtg. Boa
Soaker N. 150ß 625 Dynamic
S5
.0DynamicMagnavox
637
No. 2150 Outp. Transformer
1.2,
a g, 20 Cone Voice Cool Assembly for M
v et Spe l No. 150
.. ... .
Pat No.
1770 4161 1761-A 1761-B 1761-C 103
Motorola Model
Description
Lúe Prie.
Model 57 control head cps. Iese shafts... ....$400
Pair flexible shafts cu. (30 M. long) - --.. 2.0
(II Pair flexible shahs oye. (24 ie. long)
Par flexible shafts opt.
in long)
__. 2.00 ...... x.00
Pair flexible duke me. (36 in. lag) -- . 2.00
Toa coavol knob (K-30)
.. __. .10
Pat No.
1509 1510 1451 1455 1429
691
57
Description
Lut Pole.
Ira m Iron core L F. coil cps_ in on ......_..._ _... 240
core diode roil <pt. in
.......... . ..... 200
Small tube shield (Flo. type) ......_...__..- .R
cadet, Duet be shield (Fin. type) _
_... 10
750 050
mid. udder mol. udder
(Red dot) _ . <oodeour (Blue dot) _.
.50 .50
5 John F. Rider, Publisher
www.americanradiohistory.com
PRICES ARE SUBJECT TO CHANGE
WITHOUT NOTICE
G AI.`'IN MFG. CO.
MOTOROLA PAGE 7-11
MODELS 60,61,88,62,75 Parte Lists
Motoeolt Model 57 (Cont.)
. 14734
14í4d 1pµ
Volume control shaft cpt.
Tuition Tudsó
koch knob
pc .
(Black
_
finish)
.......... . _._ ........ -..._...
1.00 .m
1815 Bis toll
iermd 1623 Tian toll mounting 0.P and terminal
.10
13368
0..p. strip and two newel spring
'10
1007 1008 1557 1013.4
1lloo76ll9ll
1012 1449 1771 1756 1326 1420 1422 1756 1760 1762
1771 1774
¡700
Dial situa ,.... ,va ........_.
...
Dial c[Y.0
.._. ......... __. ...................... .IS
Model 57 dial plue only
.15
Bezel ring and cork gasket _ .._.._.___.... .10
Dial light assembly eu. ksi Bulb ..........__ .30
Dial poia«n (K-9) -
Hocsethae washer, Die cut gear for
(per dozen) variable mod.
...
(K61-A)
1S .25
Model 57 Volume control .........._-_.-_._ 1.60
Dial Idler
plue gear
and and
Ypuoilnt te.rs«asmsembbllyY-tp-5._..-..-..__
.35 ./5
Bushings for Drise shaft
end pinion
of flexible thefts fining ...._. __..
......... _
_....._... _.
.30 .IS
Volume control abaft fining .... -.__._..... .IS
Mountng bracket for
g posa -- ... .13
Pinion fining for key Flexible thefts any length
(pit...ft oath
.15
Steel gear
..
__
.._ .05
Tin
,, r
fo fer,
in.
headscrew
shaft s... cca_onnttrol
.03
Chassis
1442 1441
2 gang variable ta denser1053
__ .........{3.00
llute 2_
cl 1(I
2 era speaker,echassiaeptacle
'10 .nd 1
small prong)
.10
1
Antenna
1 (91.5)
_ .10
1776
Sock1109 et
10
1520 1505 1507 1507 1514 1670 1670
1511
Variable coil
can
Antenna
oil 1.17
rot
<ni
cropts. in i cca.
can -
in rut
...._____.........._
.02
is and
e. can
Dioodeeand New cotte
nc t
in
..__.... _.
1.70
il opt.
.70
Iron New
lare type
and. coil osciaaso[
pc in can
coil rim
,.
Mon
.._
... 100 ._ 40
Outer Can, Cables and Filters
1457 1456
Outer can ado Front cover only
---
-
-.--- --...-3--131355
_
14580 1459.M 1042 1393 1392
1443
1541 1343 1343-C
..- Feet aptes opt. osth spesker
Beck plug Opt for 63 oriel
a_ nd....Bel-l ..._
5.50 3.75
Bl,h plug buttons
2 2
owwxa0rrÿesthtaci.nkpeluPrglupg(lu9(1g1-9Pa02adnadndluy glu)g.)...._...,
_
............
.
.10 .IO .10
"A" "A"
bbeoeu.ryt
cable and cible and
able! shield
(36 ins. (16 ins,
Zang)
Iasi)
.25 .20
Shielded anonle led in less bushings ..__.. .30
1545 1500
3 Pc antenna Iced (replaces above) Smell cover hold down buttons . _..
... .35 .... .03
1548 .5 mid 25 V. condenser (replaces abase)... .25
1369 Huh drake (Pie wound in fibre container) .IS
1497.4 Hash duke (Round)
..._
_ .20
1493-C Hash choke (Na.15
)
1826 Set tata surds (K 3516)
._.. _ .30 _........... .05
Model
Pan No.
2011 20t3 2050 2451 2053 2401 2401 2054 2166 2053 2071 0.73
1403 2271 2251 2278 2171
2257 2237
5258 2263
Desripdnn
PLiisat
Chassis
Gush only less a,bn Tube shield (fit tope)
Tube shield (formed)
_330.00
_.
..- .10
3 -Gang variable ronde
_.... 3.35
ri. Variable condenser mounting bracket _. ..
Variable screw (68T'á)
__
.,....
Variable condense ad ve.mmt Variable condenser
A) .
.IS
.05 .25 .25
Variable condenser amionn spring.
10
Volume Volume
control control
noel
it Antenna coil (complete
m) R F 0.R (complete in
.. ___________ LOO
_.
_______ .05
em) _
1.60
focludr plate
1.40
.03 rail 100V coaedmser ...___..._ .12
'.01
mid. 300 V. condenser ,.... _.__ .11
.01 .05
mid. 300 V. condenser ..
dd. 25 V.
...._.. ..1ü5
mfd
V. condenser and SOOM
Wm
.1
r
mfd
(with
260 V.
pnde5en.s.t.ra..p.s)
__....
.50 .IS
.1
0.(d. 33 V. emdasar and momr-
inR ttrap ....._._..
....,..._,. .50
.03 .03
dd. 300 V coodmxr ___ 0.M. 300 V trod r _.... ..
... ....
.)0
.If
1a8"4'6A
1404 1416 1417 1418 1016 1816 1517
569
1 b9
1014 1027
1777
-u a .60112 0.M.,..mvie..c.o.n4d.e.m..n..er (Gram da)_.
.01 dd i00 V. oondeew ----------- .i5
-- .if .02 add 300 V coodeo«r (Kg23) ....__._ .15
.004 mid 500 V. oaedmru (K-132)
_-_-_ .01 25
mid mid
25 360
V. V.
cpmodheeaexrr
(K-IOg) (K-140
.15 .20
e"B^ Poncer Unit
1836 1837 14:4
1540
Pawn transformer (x985 A)
._..__3240
Filou choke (Electrolytic
(GI(91) pnda«ri
(4..d
._
3 m2fa-at
40
cd 550l ,min) _ (l 20/500
__,_____.,_._._.....,0..afd. L00 denser) (5, 3 and lo mfd.
at 366/3110 and 35 volt). Near .............._... L30
1460 146t 1462 1350
1784 1785
1415 1413 f516 1823
1707
Elkonoe .«kt mx
.._. 30
Top cover for same -._ Borrow cover Ins aine ..
..__ A5
.__.__ .m
Elkonde 00.1.15 washer
._. .. AS
Mallory Elkonode (53T) ._- ____... 4.50
Radian Vlhnitr (1815-B)
_.. ... 4.30
.5 0.04 50 Volt condemn.
__._____ .35
.01 mid 1660 Volt oandexr ____. _. SS
.02 odd 400 Volt cmdm«r
.20
Haab choke (456
Lattice wood Seth dolce aasmbll (97-E) .23
1793-A 1793 1794
1793 1796
- 58.T. No le wire bhobe Ohl (in ink)
.20
Shakeptod elaosdt mturbbeeeAsW(dbi(bG)6])01.-_I-U._Y.._--_
I5 .03
21/4 M a
ù.
y
steeell dwisbhde. ss.elf(Ku-2p5p5in) g_s.c._re_w_s._(p...r.
.03
160) _.
_- _......
_.._..... 1.00
Speaker
1550
-- 5 in. Dyomdt speak. oni1
- - -.33.75
1551 1552 14511-C 1839 1902
1941
Grill cloth
_.
.10
Cudbc rd gasket
Speaker Output
opt. lard on front transformer only
cover
_ _
... ....-
5.50 1.00
-
Cone md vina coil suemblY (replaced at
hnelre Spa.kr field
coil
(esplsad
at Morv),.....
2.60
Speaker Replacement
NOTE Due n, the fan shat dust-proofed.type speaker cannot he replaced by the orrice ma in the field,
acccording
te má99 for puts end xruler
to (he erabovol ate
-
Part No.
1076 1077 2078 207( 1776 2034 2035 5044
1919 1402
Description
to, Oso'
coil (complete in an)
I. P.11 (complue. tin)
Diode <nil (complete m can)
D pu to
G2l-e.e7s
tube socket retheede
(state
_
type)
5 -way receptacle
0
end chassis wiper
Lug D/L Mound Suhp
Grid ceps (per dmo, .)
Lw
Price
_
200
15
-.
6 5
10 .15 _ .25
.... ... 30
.. 35
1039 D/L Mo
C p
__. .15
1409 .0001 co..type M.. T. condemn ._. _ .15
2405 .0610 .5 lard. type M. T condemn _.. 5
1041
0003 mid type M. T. coned enser
1041
.000005 add tope M. T condemn . _ . .15
-_.- 1500
reen
1157004GrGGurraeue5an
plate plug
.._. ...._ ............................_.....
bhuuttnones.
plug butdvk (large) ..._....._
.03 .03
.03
0.19 2417 2172
2172 2171
(g Sea
lop bolo
Grec. Plue tons
S.
_____..... .03
Spec 5/16 an gneemounting S. T. xrewr......_ .05
Spec. self-1«king uni sou _..._............ 05
Speaker
Speaker only--see page I.
2146
214
2014-C
Tone control termind snip __. _._._..._
Toner l u
Tone control asumbt, complete.
..
.10
.b
1644A Grill cateen
.._. _.... ...... .10
2152 Speaker able complete with pie prongs.... .25
"B" Poncer
100. ...former can
2021 2030
Transformer tin bue
_
._ .10
Vibrara holddowo damp ...._.. _ _ .10
2194 2195
Small Large
pm cable pin cable
prongs prong
((lleeui
fibre fibre
cape)-cape)...
.04 .04
2153 3V3m. speaker mouton. bolt -7116-14
.10
5099 3100
Power
Fier
dturaknesformter
mills)
2115 3 IaYer hash chokes
2116 3 layer bail. chokes
1588-C Power choke complete in shield
2404 Eikonode (94) Mallory
1186 Flectrolytit condenser
2259 1100 1776
mid 120 V. .005 mid. 1600 Vibrator socket
condenser
V(seapidod) e..
-
._ .90
.35 4.50 1.60
.40 40 __. .10
2154 1979 1717 2405 2406
1094
(ooz 1sa in.
7/16
ini.ronl trrousshheer n
(°perds)
itSpaces blob
_.
e speaker able complete
.25
..
_ 35
_.. .10
1.00
Overhead speaker only, less all acceszories 4.50
Cone and voice coil (replaced at factory).. 2.25
Field coil
240
OSuptapekuat Ptrahnasfmormmerr
_. 1.25 ___ __ 2.75
1776 Na. N socket _
_
Outer Housing
_- .10
NOTE: Ove to the fact that peek. coin cannot be replaced by the «rein nun in the field. it will be noces
2015 2016
F
(lean or0.menu) _.
Rear covet .
._..81.41 1.25
se,y
will
to tenondl apeaken to us be nudew pans and sema
for orrice. according to
A charge the abort
94
Medallion oho ..
.50
rate
Motorola Models No. 61 1 and No. 88
Pan Description
L4 Rie
501 No. 61 Control Head Complete
502 503 504
NFBlooe.xsihbelreeorCSWohaadvftpoCluoHmKenapodlebxsCo....m....p..t..in....e....._............_.-.._.____.._..
660 2.50 .00
Key. (0-700) .____....._..._........__..tads .30
506
507 No. 61 and Na. 40 Lack a Switch
No. 1398)
508 DW
.15
509 No. 61 Black Clame -......_..__..-_._....-_._ .20
510 511
Vole No. 80 Weinur .amp . ___..._.......... .20
Na. 61 and Na. 88
Control
(No. 090-B)
513 513
Celluloid Terminal Strip
Complete
_2.7_7_7--
.0
SI
515
516 R. F. Coil
317
518 519 520 551
a Diode
8 Mid.
F20a0deVr ol.t_C_.e-.r_a.m...._(.N_o.....8.1.0_0.6_0.)._.
2240
20
8 Mfd. 200 Volt Cadess.r (No. 8500L)_
523 Filter Choke Coil (No. 1663-C) ...._-_._ 1.a
523 9 Way Mug ......_.._......._..._..._........_.._...._. .50
554
Si)
"A 9 W. Socke......___..__......._.._...._.__ .30 Filament Choke Cogs .____....._......... .36
PIA No.
Dec.,.
Las. Price
532 No, es Complete Cable AuemN) .............. 330 333 No 61 Complete Cable Monthly .....-_.._._ 5.10
334 Duel 1 MM. 200 V. Condemn (No. 1631) .50
535 Pinion Homing Floree .._
.50
5M 337 538
-- Pose Tesuforaur A.umbly Complete__ 4.00
5101 Elkwode (No. M) ._.
5.00
blur Etkoeade (No. 61) ...._.__..__....._ 5.00
541
No. es Antenna Cable Assembly Complete 1.60
S43 Cmnc Tap Audio (Toe (No.
_ 100
544
Va MM. ByBy,.Cosdmser 300 V.. (A59._55) .90
545
Mid. 160 V. Tubalo Cuedenw .-.__._ 30
546 .02 Mfd. 300 Vol. Condeour
__..__. .25
347 548
.05 .1
MMidfd. .B2Y6P0uVCooCln.odnGedneaosnsoesoerdtsreh..
Gs
......_.
25 .IS
549 .5 Mid. 160 V. Coaden«r (No. 1379) .__. .50
350 551 44 553 554
556 557
.002 Mld. B.kolcte Cosdeexr _-__.._.._...
__.__ .6005 Mid. Bea rliIe CCoonndede..
Gr __ 160 Tooth Gear
Teri.. _ 3 Wt7
4 Terminal
Motor ' SIdp Mounting Sale
- ..-_ Raixmn
"A' Betty
State Lead
Valx
Coated
Lags
-_
.25 .50 .50 .10 IO
.15 .48
Motorola Models No. 61 and No.88 (Cont.)
516 527
Nw 58'4" Bacnry Cabe
_....._..._.._ 0.25
Nn 6t 'A" Batters Cable ..-._.
_. 1.10
528 529
_ Nw 74 Speaker table __....
Nw 61 Speaker table . __. _ _.
...._. s to
.90
530 No. 74 Control Cable ...
_ _ 1.50
535 Nw 61 Conul Cable .........__ ............ ... 135
sA
560 561
573 563
.os 01x0 0000 V. avaer
(No. I6M 34
Power Transformer Only(Na. 1669{)..- 175
- No. 237 Special Socket lseened..-___._ .40
Tube Sakeu
._
- ...__ .15
__.. BR-Tube Shield
-.. _.._... .50
564 "0E' Renióer Tube ___._......................_.. 5.75
No. 61 and No. 88 Speakers-Output Transformers-Speaker Cowes
Model Ne. 88
565-A 566 5664
367 367-A
M-227.2 Output Transformer for *hove ......_.._.___ 245-AS Wright DeCouer (Round an)
9.K-5 Output ....former for above 245 -ASV Wright Defoater (Temple ao)
9-K -S Output Transhumer for above
110 10.50 110 10.50 110
568 568-A 569 570 571
572
Model Ne. 61
C235-SAL Wright DeCoster Speak«
411-2 Output Transformer for above and Voue Coil Monthly for 2227 Speaker
Cols< and Voice Coil Assembly for 24543 Sperber
Cooto and Voice Coil Amemnably for 245ASV BPakr
Case and Voice Coil POts for 155á4L Speaker. _
Speaki Replacement Pria
.._ _
_ __.__- ____.
Special for Model 62
6.50
210
2.25
_. 125
____ __.._..
135 2.25
......._ .liar SSS
Pan
No.
Description
Lis.
Pan
Price
No.
470
Model 62 iron core antenna coil . , .....4200
1333
aulY 1457-M Special Fart Cover
145916 Special bath cow
_ _ .._.eCpeepmlb:-.............._ ).]s
Eliminode
Deoelpdon
1 any anno.
uve Price
Models 60, 80 and Golden Voice
Part No.
2060 2061 2062 2065 2058 2119 2121 2112
2119 2120 5037
2036
Description
Iiss Price
Eliminode, complete in homing
.._.._110.60
.,~ Electrostaticosbielldd
..
......_...
- Speaker field choke ...-._...
Pancake choke. pre -wound. 1
Inn
.......
.10
3.0n
auks complete in fibre o p pie-wauod,J
IaYer
..
Spnker ha rot desk
5 wyod pi
....
5 way malee plug
.. ..
.50
male Plug
inn
<: veau recrptade
Put No.
2241 2543 2242
2259 2416 2,76 21764 5178 2179 2161 2140 to41 seal
anse
Let
Description
Prim
ad .0601
trimmer condenser
.. .IS
.0003 add trimmer candelas
.m
Padden
.5 dd.
teed 120
Vtotecr onk.....
_.. .50 ...... .40
30 ampere foe (3-AG)
_.. .. .OS
I.e. M.. 31 in
44 in.
monna amen.
Ima,
complete with complete with
plug.. plug.
.75 1.60
se15i0. "A
"A' csblc--betecy ed-tamp, with h« .25
Fenicio
I s.,
junction box
lens moeunnatindgeIstnp
.05 .10
a a., scrlead plug and ferrale only
.50
Plum .c.e. cannon washer
its
Motorola Model 75
Pan
Na.
Denriptitm
LW
Pan
Lias
1
Dsºiprlon
Pria
loll
176. 14734
1003 5 1761 1761-A 1761-B 1761C 1764 1765 1006 1007 loon 1754 1565 1013.A 1763
IO15
1466A 1767 1766 1756 1759
1326
1762
Control Unit
Model 75 control hd. opt. les. shale .._34.25
Pair flexible shafu.cpI. (30 in)_...
_ 5.00
shah Vol. control shaft
_.
_ 1.00
Tone ccontrolkonob (K -30)l
.10
Pair flexible thefts opt. (30 ms long) -- 2.00
(0 Pair flexible shaft. cps. (24 km long)
100
Pair flexible Pair flexible
shahs cps. shahs cps. (36
int. ins
lloangg))
_... .....
2.00 2.00
Tuning knob (Ivor, flnieh)
Key knob (Vol. petrol) (Ivory finish),.,._.. .20
Keys ( er pat)
....
Dial lice No. 50 _
Dial eyed
_ .25
.15 .I3
Mounting bracket
.15
Dial Betel
plate ring
only and
(Model 75) cork gukn
-- .iS _ .10
Did light wemblr oPe (leas bulb) ..._ __. .30
A5
Horseib« wehen (pet doau)
...._. 35
SS
Volume control (Model 75)
_... IAO
Taa Dial
comrol
y cps.
pieu andpopinoatech assembly tps
...-
... ...
35 .S5
iip Idler gnu and Yoh fasteners for T C.
L ..
cod D
._.
.
wises (p.o
Bushings fo, end of ilexible .1.515 _. .......
.IS
..15
.. -, ......... .......a
.I5
. .___..._-- .IS
Flexible ahaln say length (penh sack
In 4
m wve ..11.
.05
y s V. in. fill. ha d stew fns s.8. mead
«Bit Power Output
1516 Power vendor., (2039-B)
1e19
lem
Down .lies
Atnooskfocßm5m16P(3)03_0)
....3235 _ 3.15 _- .70
1821
6 and 6 dd. at 356 volt. 3 lard .... . 1.60
1465 Electrolyte wade.ee
1468
Electrolytic cadeorr 6/4/5 mid at 360/loo/121/2
vola
New...,.
160
1363 1357 1358
Transformer can Elkoade ke cane Top cover
_ ... .l0
1359
13.
Bottom cover Elk000de contact
........... .05
01457 Aluminum rube shield
...... _.. .13
0i1r1.09 e7 182) 1072
131490
1>16
Tube shield bue _..
........ 05
a watt minors
15
Lattice wound Lath choke monthly (77.8) .25
litsh duke Huh choke (4403) ....
..-...... .b
13 nun. No. 18 wire Adre
d400 30 orme No. 18 wire choke
.02 d
VW condenser
.m
1405
0.M 50 Volt coedeuve.
1413.0 .01 Id 1600 Volt toodeoxr
_ _.. .35 .25
1519-B .01 raid 1000 Volt <vedette.
1548 .5 dd 55 Volt caodeour
_.
.25
.55
1'44 Mallory elkoonde (53T)
4.50
85
Rathcn Vibrator (3415-B replaces all
model.
. _._- 450
1706 Spec. elk000de for 11 volt operatic
(G -53T.)
....
.3.50
Chassis
146] 1811
3 gang variable condenser , .... _..
1 wsp solve. Plue (91.P) ... _...
525o .10
1434
4 way male plug
1441
way speaker receptacle (1 Loge and 1
.10
(ion 17]6 Sockets
type) ... .....
l0
1520 Variable tens spring
1362 Tube shield thvol.root brehee
.15
1361 Dud tube Yield (Fin type)
1439 1492
et 1000 mal. adder endenter
Antevea cod
.50
1483-Á R.F. cod opts. in can (with plan choke)
On
1013
Oscillator an
an diode oto
can
1.16
1813
coil 1814
1666 1813 1801
1817 IoM 1041
60.IS 1408
I P.
pe is can (46695)
Diode Iron ro e Ber cell _.
conn il
(Kp-t690)
_.
_.
Ml. 0.p for bias cell
0002 mfd mica condenser 0603 mfd. mncond
mfd mica condensercondensera1
mid. min condmxr
1.30 1.30 x.60
_ .15
..... I1
14
.01 mifdd. 100 Volt condenser
140
.01 mfd. 160 Volt condenser
.15
1403 .03 0.M. 300 Volt comden«.
.I0
1016 .00 mid. 300 Volt condense (K-142)...... 5
1514 1515
coed.. .104 mid. 500 Volt condenser (K-142)
.1 0.M. 200 Volt
.15 .15
1515 1506
mfd. 400 Volt denser
AI mmid. 400 Volt made..
_
,10
____ .H
1506 1573
od« Al mfd.400 Volt condenser
05 mid
Voalt condenser
... _... .50 50
1573
A i dd. IEn Volt modem«
.m
1790 1545 1545.4 1333 1333 1300 1304 1374 1390 1391 1374 1474 I392 1440 1480 1369 1{69
1la04x0
1540 149 1417 1487 1497 D 1551 1551
1337 1305 1824
1705 1796
096
1626
Aoo. Junction boa uaembly complete lard le
Motor Noise lead in (sew 11 la)
.02
Mom soi« ono receptacle (hags prong) .10
Antenna su receptaclerecepetacleom
Sm W
cible pimp
extru Larll ppaiioos
Smell ibre
w.aben (pit dam) .30
Loot coodm Dh.n
.OS
da.) Insulator for
plat,,. (per dora)...-. .30
Insulatored for lose Extruded insulator
pfoortela(sperpl
_
.30
- .03
V
w x 0..x
Vl m 14 hit
vosd dowel
od dowel
(pe d ) (per dozen).
.30 .30
Small hub choke
Medium hash choke (pie wound)
30
con... .003 add mica condenser m mfd. mica
V.ive«r .5 old. 15 V.condenser
S mid. ok Tone code
Tae carol
(No.5 wv e)
choke and bncke
Hab choke
Huh choke
/Steel gear
adket
eliedoaode anW urea
-- .30 .30 _ 25 - .50 ._ .50
.20
- 'Is
.__..
y g ,pslu
in.
xn Iobeh waW tchen (K
(4018.32)
._-A.303l
J Ind d!t tapping sºwv
/per 100)
Sea mat. Duds (K-3516)
_. _-. .m
Outer Housing, Cables and Eliminode
1365-C
1365-M 1367 1366 1366C
p t (Model 75 outer c an
with EBadoode
system and cables, less coven) ____...._1.0.00
Beasok except for 79 Mold .. ..___.._._.....10.60
Back ever
_. _.__.. _ _ _...._. 1.60
Prom cover only
.....
__._,_ 1.25
Front covet opt. with .spether Grill. sod
1366-M Same except for 79 Model
6.55
1624 (Elidnode travel season ca with choke -
sod bracket, ready to maus...._.. ____.. _. 1.50
1349 Terminal Drip
__. _.. .20
.
1109
1 war recrpucic _...___... ... _.. _...
.to
1326 1341 1543 1343 1316 0544
Bushing for rot. and M/N able .._.___ .30
"A" battery cable (36 its. 10.41 _.. _.... _ .25 "A" benery .ble (26 ins. hug)) ..,. _...... .20
Antenna lead in and hulling pc __. ..__ 40
Mawr noise lead in and bcu.og epe
20
iielded loom for me lunmon boa
.15
Speaker
1560
6 in. Dynamic speaker (6531A-Ká.5)
$4.05
1837 Output transformer for same (L1199).._ 1.25
1566 6 in. Dynamic speaker (6732.4.'6-.7010) 4.00 1818 Oc.poi ...former for same (6732-A)..... 1.15
1629 Speaker cone sod voice coil (replatd u
1830 1443
. Speaker field coil (rpleced st Mors)___ 2.00
l war plue and cap
..
.lo
1561
Grll cloth only
1517 Wie. sore,. for
.
........... .IS
1545 Paper whet
_.___....._ .m
Speaker replacement
_. _.
_.._....__ 175
amt NOTE Due to Me 1eo Meg .peeks coon
be
replaced by Me orrice man in the told, il will be emcee -
tied Dry to ritura .1l sacker, to us for tervine..A
ì1I be made for part end service according to the beve
tole (18291830).
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-12 MOTOROLA
YODELS 77, 77-A, 77-A(B Serie a)
79,80,1649,100,110
Parts Liete
GALVIN MFG. CO.
Motorola Model No. 77 PRICES ARE SUBJECT TO CHARGE
Mode180 (Cont.)
Pan
Liu
Pan
WIT30PT NOTICE ua
3198 Medallion yam (each)
.50
Na.
Description
Pair
No. 77-Control Unit
Gr 701
703
Flexible Shaft CCompltheWWoormrmn 3.W
703
603 Oucd Spring
10
704
.20
705
706
70
700 Control 709
......___._..__._ .". MMoguunotigng SaaaP ._- _.._._.._ 35
710 711 712 713
G. CKDmhail'd. .L(iKgh0t1)(NS.o_am_0_P0_)ine.._o_r .C._o_v.e._.T..o_r1o_ak.á._..
.50
30 .IS
714 Drive Paim ....._ .............._..
30
Na
Dewipem
Pdm
738 (Na g300Á) I MM. 300 V. Ele(ssol,dc
739
740 741
742 743
un__5 C(Nooad5ef3tr0)-65 Mid 30 V. Electrolytic 90
CWonedsonW.º ood -R. P. Choke. Canine .30
.01 Mid 1600 V. Boaº Cond. on Cm
..__.
...._.
-_._ ..0
.0015 Mid Ma
..__._
.001 Type Ml Abo Condennser
/S
745 2lkmode
745 2 WI, Power Und Pluogg, 74 3 War Rºepode (HB1)
_ .10
.--._ IS
747
74 Sponge Rubberbb Elkaoode Cusham _..___. .20
No. 77 -Outer housing
2199
bun- 1793 Black plug bunne ( )
2413 Back plug
(medium)
1500 Blab plug »norm (.3.11) _
._- ..__
.03 A)
A3
3018 Jdh moo c
2019 Set rimmitng net wiper
AO
2017 3172
a Set mounting bogie
5/16 x s/ H. H. P. K.
.05
45
2171 5/16-18 hex sled 0000 .e1F Ioduoe
AS
Ille K.015 Laos .seeker and ......................30
1797 110» 2415
K
3 y7U)-
6
M.
_ steel
.ml
wa(dp.
..
dm)...
16e / dumbob
.
in. iron mehes
_ 4 lakwubet eur ))
__ Cone rod yoke mit
.._ AS
.35
35 2.75
2414 2096 Outpuz urcS
__ 2.25
ker tree= aalY.tepige 1.
1375
2169 0610 dud.._.._.-._-_
.30.90
._. .80
.13
Speaker replacement
4.00
ROTE:
t pl.md
Due to be fan that .peaker by the .erv.s man in the field,
con e will
be
be
new
dart mart to amen W .pnken m u. For service A
will be Dade for pana and service .(ending .o the above
rue !1790.10005.
M.99
715 716
Volume Control (31C) Dal Light Sod- .
._.....____..__.
2.00 .15
No: 77-Chad.
727 }G.ag Variable Caodmeer
700
719 Antenna Coil Complete in Can _..___._ .50
720 R. P. Cod Complete o Can
.. ......._ .50
721 Oscillator Coil Complete b Cu .od ua
tuned R. F. Transformer mounted derma. 135
749 750
Camº Wm 7
Receptacle .........................__.....
.50
3
Terminal Sump _..__. _.. __... .20
751 20 Toms No. 12 Wire. Eliminode boke .20
752
---- a(UdsePdowiner"AU"niPtaCmircSupitkr. Fold Voire Coil
26 Tow Na 16 Win Had Choke
30
533 754
Antenna Receptacle Shield Weed. ........
.10 35
Conan, 755 Red D3 Mis Coodeoon
756 .01 Mfd 300 V. Tubular
.t5 . .15
722 723 724 713
726
L F. Transformer Complete in Cu .__....... 1Á0
- Tube Societe Sane Type ....... ___ .... .15
I. P. Audio and moka Assembly (2131)... 2.50
Plug_ 7 Way
727 728
700
ßw 1 We, Alumna Plug
Toe Control Bracket .
303 Too.
MM.
CmW
e
11.6.
... ......._
.._
.. ....
_
.10 .05
.25
730 .25 Mid Condenar in Can (No. 1772)...... .60
731
))3
.30515-35M0M.OhCmondCeandseoróm(TuRbualahrb) t_........_..
S .20
No. 77--Cables and Filler.
737 "A" Ba0.rn Cable ......_.
758 759
An.. 2 Wire Speaker Cable .......
Shielded
Loom _...
ID 35
760 5/16.11.3" Set Mo.. Bolo .
.0S
No. 77-Speakers
161
S
Housing--6" Size (Na 15011) _ .75
76: 763 764
LSpmcnk¢SoS,Senattdon
of Adiusubk of Adjustable Thumb
SSppeaekakerersStdtud ._...._.
.20 .10 . 0
'"No. 77-"B" P...eer Unit
733
Powº 0,1, Combles ____113
734 735
Power Traodosmer (No. 2152) __.__._.._ 2.73 30 Elkoncide
726 Mee Ogke (No. 2119)
1.0705
765 Metal Std A,
.40
766 CCoop Grill for 6" 5pake (No. 14DM) .40
767
74
770
w., Speaker and xdDyoo.onable
for Model
Bkoltos eel
105
Magnavox Dynamic
Cmpt Transformer
Speaker No. 1502377 Same (No. 3120)_
635 2.00
737 (No. 8300 5) 8 Mfd 300 V. Electrolytic
7)0 CSp, eel Vnace Cod Assembly
2.00
774 "B" COodhi.., ._...._
Motorola_
........__._ .. .90
Modele No.
Speaker Replacement Charge ...- ..___. 4.00
and 77-A
Series
Pert
Li.. Part
liu
No.
D..tripdoo
Poke
No.
Dewed/lion
Prim
No. 77.4 and 77A -"B" -Control Unit
003 803
FWlexmible
Shale Bock
Complete
with
Worm
Gear
3.30 .30
804 005
807 007 809 809
8l 811 813 813
815 816 016
No.
117 818 809 820 761
047
84
049 850 851 052 853 854 855 856 857
Cteaeot Nines Bing
30
Hexagon Nu, (Meaux)
.IS
Conon G
_..- 3S
Mourne RMard Baexell
MDioaul rnPinlagtMe apnD.pi...
_.__
. 35
« .4 Special Blok pnob
Ky. Gear.....(Specify Come
_._. 30
Flee
)4th
Keen iKÁ13 .. .............._. ._._.._.
35
Dao, L,tf (No. 4)
.83
13 PCConmtrol
30
Volume
Center tap-1/064-21C577-
Dial Light Soler
_ ._...... __ _ .15
_
77.9 and No. 774."B" -Chassie
3 Gang V ºi,ble Conde., (77-S4) _.. _.. 2.00
__I2Á0 Variable Cademer Msmta* Bow. _. .10
Variable Codeoa, Brass Wlpn
Mounting 5aew, _ . .__.. _.Dra,.
.05
33
Vuieble ('oedema Temin Sere.
.w
2 Way Plop
5 Prong socket with Spay P4 ...__._.._ .13
Electrolytic Cmdn (No 0420)
..... 1.20
.5 MM 160 Volt Condenser
a 0. F. Choke on Mounting Strip
Too
B E110.0
Power Transformer (No. 3170)
_.... 25..0505
Filter Choke
(No. 20604)
1.53
.01-1600 Cmdnar for 1.611 0Ringoe .40
Sponge Rubber
a Cudim Ringo .10
Special Spn7 Shbi,e,Mld
.M
822 20M-20M Ohm
Guided. Red.mr- _. .40
32; Amman Coil CompletealayGp n._. ._.._ .50
ú7ircpmdem 825
W
......- Lii
2od L P. Towsf. Complete (77.A Oe17)._. 235
839 Dkde F.ed, Complete ...
._ _ 135
651 .0005 Mfd. Mice Condoner (Made Ds)_ .15
i}t .0005 Mfd. Mis Cmdenar (Madget)...... .15
O 32 35 Mfd. 500 V. Cpndhior io Can (Na
835
631 135 Al Mfd 300 V. Tubules Coodeo.er.......__ .15
8s3n6
838
039 eb
02 MM 600 V. Co..).(Spec. Cm) (2036) Adio Choke (770,07) (No 8759.F)..... Adio I. P Tren.forner (77 A Only)
.30 1.25
3 442 To,, Control (Na 13026) .._....__ ..............
441 443 844
___ Back
lodi
Knob Wood (Na 9563) .._._.._ Dismal Mitch (Na 20993)
IS
7 Way Plug (Na 9277)
_ 00
443 I Wm Plug (No. 910)
A"0 1167
oor7'.C1Me
3p.
614 869
Spsker Antenna
CImablae --hr
_._
35 __ .50
1170
Go m 31/e Pt Ps 2 Way Receptacle
RR(eIeawaddy,y)))
U
_... .55 .I5
éix 873
874
Mounnsp d,10 9PTWerm.,lml
Reversing Receptacle
.25
(4 Coon«) _. __ .20
875
876
207 .:s Mfd. 160 V. Tubus Coed (Na 0779) 35 676 Rad Dot Man Condeve ..... ............. .13
No. 77.4 and No. 77.4."B" -Outer
!louring
No. 77.4 and 77.4."B" -Speakers
n858
P Cover
Beck C. r
860 7 way Rmpmcle
061 061
mhiº RmpdueA
863 .05 Mid. 300 V. Tubular Conover
.f0
30 3 30 ... .15
36520 864 uTuw1 No 11 Wirt, Eliminode Choke. .20
(Uad
Spits Field, Voice Cul
B Power UmirOs , )
866 26 Turns No 16 Win H.4. woke
. .20
Special for
Bao WI 003
003 005
800
0W07
Model
Speaker Speaks
HGesrtiolnlfo. rfoer- 8S5.S..p1eaker
Speaker Stud Bolt (8ó0r1)
._... .90
....
o
rabker 5 Bolt
.d Chuod. Screw 54'x))'
Comp. speaker
Assembly for
A ad .10
B in housing with M,g Boln. .vol C.Nn_10.75
P.O Roa Speaker and Output Trans............ 1.50
.d Me.. Output Tm.lomerer Only
Cpoe Vol.. Cod
2.65 for Some... 3.35
79
Pan
No.
Description
>h
Pan
Pris
m 1363-4 Special toner
e
_. _...103
116634 Special front rover wot speaker .. _. _ 435
1366TC Spinal bank frac cover .se top alms 2.50
1333
Mio
1654
24934.
Model "80"
Description
I way menu receptacle Low for leads._.._ Dud generator condenser No. 15 wire huh sole
Liu Peke
____235
3 _ .: __ .30
tdr
D..nal.ion
Pell
Chakeie
brin 3002 Volume omuol
.. _. ...___.._ .10
1003 Shell support bracket
_... _._ .10
2050 2051 3453
.darcs 5.8uó6 variable .004.0.,,
_ .__-__ 3.50
Vara.able -darces mounting bodges_......- .15
2433 Variable condoner adjustment mm
.05
341 2014
Variable Variable
condenser
c
tdlrnirieveivaen0e0ee03(K86.1._Á._)._.._......
35 .10
__.__ a3 2060 Volume control .. ..._._
3 2023
2071R. ád3_ 2073
Volume control funnel
m) roil (co(complete
.__._...__.__.._
a
_. 140
m) R. F cad (cumpplI
0
pate
LOO
Parr No.
mI 2256 2357
2264 143 1777 2275
2091 :Is7 11 0
Deamapaon
Lin Price
.01 Md. 100 V. and 553M ohm resider-. .30
.1 add. xs V. canden.er Milt mounting .20
map .
.._..__
......____.._ 30
-er .25 mM. I. .03 add. R.5e3a3asItodn.
50 V.
V.
(name
rcooeddeo.r ..__.._... rals) ....._.-
153 V. toa4aar _.._...._.
30
25 .iS
. .13
Input choke
_ Output tnmatmer ......._-'--
225
Pan
W
No.
Description
him
Airplane Type Control Hood
2205 Penner a0veam.blp ....___.-_.Jp.2.10 5
202
Dial pyamiss(
E,dstd
dial
face
..._..___._._
35
208
3 415 1008
%eel
11.13 Dial
.mtroaepgldse-t...m._o._m._f_o_r _k_n.o_b..._(_p_.r.___d.._r_.__)
.15 .25 .15
Pan
IL
Na
2144 1007 1001
2225 2326
Description
Paia
_._ Felt ...ber for Mel
_.
35
Dial fight uombly Ine bull,:.......____ 38
Na 50 6/8 volt dal SW __._
.13
.10
ß/t Toning abois 2513
- Volume annal ,haft, 26 7/16 is
- L80 100
1326 1759
FKl.e2x1i8bleW.i1r.tf0dirbtus(hpinrPdn.)..._....._.._
38
.23
Motorola Model 100
Pan
Na
1750 1761 1761-A 1761.0 14710 14732 173 1731 1751 1754 1754 2755
006
1.6
2706 1556
Do000ipim
Liu Pelee
Control Unit
Model 10O-Caolmi hod cp1. Ian MM. 35.00
Pair flexible aryl. cm. (30 ont long)
2.00
Pair flexible shahs cps (24 in . king)
300
...Lou Pair flexible
Ru flexible
dohs cps
shafts ay,
(Is m. (36 in
long). long).
..
3.00 2.00
P Vol cu of dol
_
Tooinc .hxh kno
_
Tone control knob (K.37)
1.10
..... .10
mats Tone control one
cost eu ses
Tune control assembly sas leu
.35
.._ 35
Tuningknob (chrome Patel) . ....._. _. .20 Key knob (Vol moud) (dsromc panel) 30
,Key.
DW Mal
par lite
No. 4 Mlcor_a.c.e.,f. or
._...__._.__
melee Apr ...........
.25 .05 .1S .15
1531 1013 101}A
1015 1013 175] 2758 2399 1]26
1326 1422 1410 1760 1762
177173 1774
P01301r loi for dW Pas ....___..._._._ AS
_..._.._ B.el r
Betel ring aondd cock gasket _
.If
vanable._.35 Hone.. ...et (per dozen) .. _-.._ 35
Die can gear lot Pointer din end abaft assembly cm__...-
I5
.dx_.15 VCloiplumkenecoeo,trol T C..
13 D.t wirmes (pes
.._ Bushin .. _.
Boding 108r end of flexible eb/b
30
Dolo,
doh hing .........._......._.. .I5
Dran .tell Pinien fining
.13
FFlienxtiebleóadu»brmkyeyIrrede (pr
h tad
IS
.4
Soll Rran
...
___... A5
3 Tin s% e.in. for vol screwutrol droh
s/x)k in. fill. heul urea for mm. control M
Chassis
303 311
3TugbaengMreelrdi.M(e60.1c1a.g4dmterar )
f20 Variable t
rp',00
_0L00 AS
323 Variable condenser shield
33
)31
340
_.____
Sockets11.10,0
.10
rpuacle
III
8, 483
583
Antenna mil p. can (76 gibe)
.75
am ia__ ad New
R.F.
type cod
antenna coil cps cps in can and
panmeob
7
Reh.)
.73 .75
New style R P roil cot In
Oho
85 50 055 585
507 586 779
74
_.- Diode co' cp8. in an (Kó96)
130
----- mm ep Non Style I.P. mal opt in
New aryle diode mil
in
L30
..._..._._ New style plue coke only
30
_ OInuptup,ut.dtr,aomfdoerookseer0.o1nly -. _-.
135 .133
630 Iron rose en,
... 2.00
,d 0657
Audio and output (76 tube)
trendo[sr .tetrMp L4
554 Audio
02aelvmn
y
Mmd - 3 (07 dad
040 .00, mf . mice enn4mur
_ __._ LIS
.0005m mi.. condensse(r1000-31. 'ISz
Mite dis) __......_._._........._..._........_.
401
44oé 406
our.. .25
.n3
Md. Md.
300 400
volt volt
m48en
3t8l
ao48r .03 mid. 400 volt
_......__. .I5
407 409
.d.. (A(pbodd. 120
cond..cf.els
33
791
levy,)lpeakn cfr4
(0.2,2501rÁ)
327 412 403
liep puuy
.43
foe
md(.453
ans eéd 81/44. V. coodemr'ed
__. end_.....-.
.03 mid. 35 V. cadm.ir _....._. _.......
3h
3S JO
4d0l0
497
494 491
40 50
6
T T
--NNoa.
T -Nn.
Ill
18 14
win win win
bad. huh huh
coke drake tháe
.. 30
.... 24 .. _... 30
791
793 794
SSmk,bmepommfueIgskBwoduebe0o335(3461)0.32)
AS
795 796
ore. yi in. oral bd. Bell upping
(pee
04) _._.__
___.._ .............. ion
1470 8 in. dyn.mics pinke(rEarly Model) .....1600
1570 8 io. dynamic speaker (late Model) _... 600
1375 Speaker hou.an8 only .
..
Special for
Part No 1410
1412
154
1777 1433 1436 1438
Description
Lb. Price
mfd. 100 hilt A .0 M. ohm ras
dens, and .03 Md.
Adder 400 volt
.a._d__.m.._il
..................._._ condenses nine
.15
control
33
0011 cold. 100 volt end 25 M. ohm mn.
20
500 ohm sdohm tel100111
35
50.>e ohm can0
190 ohm and 000
matin
o hm variable
mitts
_.
35 40
"B" Power Unit
17111 1762 1368
1307 1309 1306 1306 1350 170)
;;;I:
1706
1405 1403 1406 14130 1567 1419 1S7x 0703 0500
15860
M97 -C 17M
Filter choke (2545.0) : .........
.70
nenrolytir condenser (0/8/25 odd. 330/
roh _..... _ .................._...._._.__.._.._ 1.75
m 3 Der Tran330/2o5
CDyok.e,,Ib,,
.ockn cee .................................... lame ._.._..._. .................._..._
m -_ Elke and amdener »k ld
.1S
35 35
Elk crawl imber
-- Perforated tube *Meld (042111)
A.IS
Mallory Elkonode (53'[)
open.. Radian Vibrator
modelO
_
(31115.8
..r.e.p.l.a.c..e_. _W-.
100 4.50
Spec. elkonde for 12 volt
(453 T) ......_.
__.... _._.. 530
.03 old. 120 v. cood.emr _........_._._ .12
.02 add 400 r. condemn. .. __ _ .__._ .20
.0I Md. 1609 v. condenser (o0 typ)
.01'0154. 1600 v. condenser (wee type)._._ .35
.02 gild. 1000 r rs.denar
.25
.92 end.
0084.0 er
l.an.e wound h.40 drake assembly (77.4) 3S
New style huh coke
.. _._ 35
Nerv Huh
Hub
stcyhleokehuh(P.oPk.e
noel.in tube)
drake (3 1 yea pie
shield._ _. _.
wend)
_.... _.
(K-
.35
30
410Á)
Outer Housing, Cables and Eliainodes
1315-C
Model wrens
100-oe0,1,
end nNe.
m
Iss
oraptnnwith
Plimioode ._.310.00
1515.M We except foe 110 Model ._ ..... _. _...._11.00
we 15160 From cover apt wad+
pace
.. 1.25
1709 E1,0,00de travel action cm. with dalle
»30 4 way
.30
1347
1 way antlepluug8g.
_.. .t0
1341 1343
3 A bat cable
Antenna Ind an and
bushing
ap......
_._ 35 ......
1346 Motus noise Ind in bude,n cps..
40
1545 1543A
AMMnoottoerrnnDaaleod
IMm
(ass eryle
an (new Style)
.40 ............ .40
1544 Shielded loom loo .n,. 'tun11i00 loo, _
.55
1793 Junction ho, asumbly(am nP.....
.50
1335 I3d.
1
AmoMeter
Mall noise
(renal pang) (loop prong)
Mal1301 l in cable
_
in cable prong
fibre
.ashen (per dew).
'.10
.10
.p
13173744 Longl
extruded
1391 Rond mdeneer plates
os
1360 Imdarer for round d. plo,n (per dm.) 30
1309.A Insulator for 6 long codeoor plates, eeds 20
1476 I(npseur latoarmfor single bog condenser pate .30
d..... 1437
1440
1/x7/do. I/316 i
.004en dowel wooden dowel
((Pperºsdeo0do))......
.50 .30
1569 1332
Smell
5,..l
phaa,h
fcoor kdeim(p. iaodwien.p..d)
...
.... .n
______ .15
1337 1305 1311
1243273276
171
v y io. eliminode tmnl mew
.......
G)11r54ou3kn-d8wdeaukmepr
cable pan
cps
with thin.
prongs
.p bal (WSinnipcloeIdea. edtar
440 em
..__ ._ ........ __
.10 35
.3w
.10
1471 1117
Grin cob loo speaker Short apuker and(KMI)
.._...____ In
no. 1115
1797
1.0.0 spoke, and (K-305) _-___._._..-__
2% io steel when
30
A3
1790 1799
Speaker Speaker
cps in cone
bombeg wide rag
and mice cod (repl.aed
f8v.
840
la53 Speaker field oeil (replaced at the bobo,) 2.00
4.10
1. ans NOTE:
to taw fan Met speaker
cannot be
ow. replaced by the smart man in thr held. ,t wdl be
ran. mry to
all apeeken on us too service. A charge
"11 be made for pares and &vice according to the above
rate (17992.0).
Model 110
2075 2017-A 1079 1407 3400 2034 2035 2030 2409 2409 2410 10)9
104
1041 1400 2152 2312
2600 1009
s 01101ao
I. P. toil bande mil
c(co(caolomm(ppclloeetmteeipnlemtme)s)
) __._.__ -----__..__ _._.__...._
1.53
11.335
Mou! robe socket (deal) alpe Na) .._.__ .IS Na INS Bobet (.pedal) L) epos ...._._ .IS
s dud 1 -way
5 -way receptacle
Elimode ad
. _ ..... ....... ..._._._ wiper ........._._..._
31 .20
rafo DLL
Grid
mpounfotirngmeetadlpWee
.__......__._....__ (per dm)._........
.10 .15
ftype. .00e03 mfd. type
condemner ....... __.... .15
.0 mId type M. T. confluer __. _. .IS
o00T14 typt M. T,
mer
.. .... .2S
mdaer i Dpi.
.01 mid. 300 V. T. T. condenser _...........13005nda
.OS add 400 V. T. T.
m ..._
Housing
Front war, talai
Rau rover
...._.
8275
2.90
"B" Power
309'
2030
30.
2021
3096 2115 3116
Filter drake
5 ayº huh
d()u5kem.il_ls_) _...._...__.._..._..._..._...____..._._
3 ayes lud choke _......._._.____
.70
.30 .36
1500 Power duke completes shield .__.._....... .35
341 Elkonode ._..... ...._... ...__.._..._ 4.50
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www.americanradiohistory.com
GAMBLE-SKOGMO, INC.
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PAGE 7-2 GAMBLE
MODEL 5-Y Alignment Drive Cord Data Resistance Data
1ll3I,1+.-SIiOG.11O, INC.
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©John F. Rider. Publisher
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GAMBLE-ShO(rMO, INC.
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Optional "C" Battery Connections
Misalignment or ntistracking of condensers generally manifests itself is broad tuning and lack of volume at portions or all of the broadcast band. The receivers are all properly aligned at the factory with precision instruments and realignment should not be attempted unless all other possible causes of the faulty operation have first been investigated and unless the service technician has the proper equipment. A signal generator that will provide accurately calibrated signals over the broadcast band and ail output indicating meter are advisable. The procedure is as follows :
As the I.F. stages are self -tuned, no I.F. aligning at the intermediate frequency of 175 K.C. is required.
First set the signal generator for a signal of exactly 1400 K.C. Connect the antenna lead from the signal generator to the antenna lead of the receiver and the ground lead of the signal generator to the grouted of the receiver. Then turn the tuning condenser rotor until the marker is at 1400 K.C. on the dial scale. Adjust the two trimmers oil the tuning condenser for maximum output adjusting the oscillator
trimmer first.
Next set the signal generator for a signal of (AX) K.C. and adjust the oscillator 600 K.C. trimmer. The adjusting screw will be seen at the side of the tuning condenser and is reached from the top of the chassis. A non-metallic screw -driver is necessary for this adjustment. Turn the tuning condenser rotor until maximum output is obtained. Then turn the rotor slowly back and forth over this setting at the same tinte adjusting the 600 K.C. trimmer screw until
the highest output is obtained.
www.americanradiohistory.com
PAGE 7-4 GAJIBI,N:
MODEL 07-A Schomatio,Voltage Socket,Trimmers, Parte Alignment
, R.R
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List
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Misalignment or mistracking of condensers generally manifests itself in broad tuning and lack of volume at portions or all of the broadcast band. The receivers are all properly aligned at the factory with precision instruments and realignment should not be attempted unless
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CONDENSERS WITHOUT
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Type
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List Price
all
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200 V. 200 V. 200 V.
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$0.30 .30
.40
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proper equipment. A signal accurately calibrated signals
generator that will over the broadcast
P-80862 P-80919 P-80862
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band, and an output indicating meter are desirable. procedure is as follows:
The
P-80890 P-80030
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CT C$ C9
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.26 mfd. .050 mfd.
200 V. 600 V. 200 V.
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.
.30 .20
.30 ,20 ,30 .10
1.50 2.00
,50
.20 ,20 ,20 q $5
ground lead from the signal generator to the ground lead of the receiver. Set the dial pointer on the 1400 K. C. mark on the dial scale and adjust the three trimmer condensers on the gang tuning condenser for maximum output, adjusting the oscillator trimmer first.
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PAGE 7-8 GAMBLE
MODELS 7J-512,7J-574 Circuit Data,Changee Alignment
GAMBLE-SKOGMO, INC
@John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-SKOGIVIO, INC.
GAMBLE PAGE 7-9
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GAN1BI.E-ShOG IO,
Power Consumption - 140 Watts (At 115 volts 60 cycles)
Power Output
15 Watts Undistorted
Tuning Frequency Range
B Range C Range D Range
GAMBI.1? PAGE 7-11
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PAGE 7-12 GAMBLE
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GAMBLE PAGE 7-13
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GAMBLE PAGE 7-15
MODEL 26-B-5 Schematic, Socket
Parts ,Power Unit
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PAGE 7-16 GAMBLE
MODEL 26-B-5 Alignment,Voltage Reeiatance,Parta
GAMBLE-SKOGMO, INC.
VOLTAGES AT SOCKETS Input 32 Volts-Antenna Shorted to Ground
Type of Tube
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REPAIR PARTS LIST FOR b TUBE, 32 VOLT D. C. RECEIVER
When ordering parts be sure and give the part number. Also give the series number which will be found in the License Notice label. If there is a spot of paint on the chassis, give this color.
MISCELLANEOUS
Part No.
ITEM
P-5200 Antenna Transformer Assembly less Can
P-40433 Can for Above Assembly
P-5302 Oscillator Coil and Can Assembly
P-5221 1st I. F. Coil and Can Assembly
P-5203 2nd 1. F. Coil and Can Assembly..._ P-506:6 Power Transformer
P-50634A -6R Output Transformer
P-50637 "B" Filter Reactor
P-1885 6D6 Tube Socket
P-1944 6B7 Tube Socket
P-1945 6F7 Tube Socket
P-1946 12A5 Tube Socket...__._
P-203) 12Z3 Tube Socket
P-1637 Speaker Socket
P-2060 Knob, Small
P-3362 Knob, Large
P-10372 Rubber Chassis Cushions P-40445 Tube Shield
P-40443 Tube Shield Base
P-10321 Glass Crystal P-33875 Crystal Retainer Ring P-1421 Single Lug Mtg
P-2130 P-27912 P-10337 P-30342 P-70702 P-70703 P-2012 P-2147 P-2173 P-10347 P -1029t
Double Insulated Mtg. Lug . I.arge Double End Pointer Celluloid Indicator Disc Grid Cap Only 115 Volt Line and Plug Assembly Antenna and Ground Wires Pilot Light Bulbs (68 volts) Speaker 6" Mantel Speaker 84 Console Rubber Grommet (Small Gang Con. Rubber Grommet (large)..._
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P-20926 Screw Hook (For Mtg. Vib.)
P41101 C19 .01 Mf. 4tnV Tubular Condenser.
P-81101
P-0888
P-80888
P-81054
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.25 .5
Mf. Mf.
2'0V
143V
Tubular Condenser...._..._ ........... Tubular Condenser ..... ____..__........ .
INTERFERENCE ELIMINATION PARTS
Part No. P-91011 Spark Plug Suppressor P-8093., Dual .5 Mid. t:enerotor Condenser
D. C. RESISTANCE OF WINDINGS
Following are the D. C. resistances of the various windings in the chassis. The values given below will vary slightly in different sets.
Part No.
Item
Code D. C. Resistance in Ohms
P-500 Primaries of Antenna Tt ans. in. Set tes
TI
Ist Secondary of Antenna Transformer
Ti
_nd Secondary of Antenna Transformer
Ti
Small 3.2 2.4
P-5202 Oscillator Plate Coil .............. ._..
T2
2.0
Oscillator Grid Coil
T2
3.5
P-5221 1st I. F. Transformer Primary
T3
67
1st I. F. Transformer Secondary
T3
93
P.5293 2nd I. F. Transformer Primary_..
T4
63
2nd 1. F. Transformer Secondary ...
T4
63
P-50624 Output Transformer Primary
T5
243
P-50637
Output Transformer Secondary and
Bucking Coil in Series
"B" Filter Reactor
T5 & 1.12 17
Small
300
P-2147 ¡ Speaker Field
P-2173 L Speaker Voice Coil P-50626 Power Transformer Primary
97
Small
T6
Center Tap to Inside
T6
3.6
Center Tap to Outside
To
4.4
Power Transformer H. V. Secondary
T6
Center Tap' to Inside
T6
322
Center Tap to Outside...... _ ...... ......_...-
T6
350
Power Transformer Pilot Lamp Sec.._..._
T6
.3
P-2153 Vibrator Unit Magnetizing Coil
1025
Vibrator Unit Filter Chokes
3.0
Condenser Alignment
Misalignment or mistracking of condensers generally
boaaampampenrcltroleeheadcornnneuptpritriraersoefaiorteqnnptpaseusvtonteehlisesqdyrroessleurytiidrbiitiecgpsnlaaaaeamefltlllolteliiieferrggcbdonmannraiftuanmea.sestdnddteeehAdiidsbnceaarattutoseotbsnaiistfignrldhhgefongoernstaaehustadlutqefllhdcstanuhegaciefennsetanoeotognucfsvrtefeylbyeetrarba,ryacvnenwttiaddoctnaooihe.rtdtfpheltaeTtetaechramphdcabknarehjtpretuionotcoorseaiiewnfutcsddmctiiicpoaevlhleuaninuoavnnsltvpetuhtlieserrmanmo.ssbsssvefeatiiratntadrhuerasdleee-rtlt rslseoeigactFdnotiiarorolsntftogtoshetfheneteetrhrtfeaheucteloel3irsvoiegagprdnae.nanjulgAspgtodmcesjoniuetneinsodrttnaet.ntihosseTrechrfoteornuiramnnnet1mcit7lete3endr0mnaoaKtfox.litemhCtahedu.emoTfsrauconorimtnlueltanptttnhhouaeetr
is obtained. The oscillator section is the one with the cut plate rotor.
Now set the the rotor until
signal generator for maximum output is
1400 K. obtained.
C. and turn Adjust the
other two trimmers on the gang condenser for maximum
output.
To obtain dial scale signal and set the dial
calibration pointer at
tulle
that
in an 800 K. C. mark on the dial
scale. When calibrated approximately correct
in
at
this manner, the both ends of the
setting scale.
will
be
The use of the the necessity of a
at this frequency,
cut plate type of condenser 600 K. C. padder and no therefore, is required.
eliminates adjustment
Servicing Power Unit
Vibrator Unit
-
The vibrator is mounted inside the "B" power unit.
Normally the vibrator will last upward of 1000 hours.
However, in the same manner as a tube it may become
defective ill less time and require replacement.
If the tubes no vibration is
light felt,
and then
by touching the power unit case, the vibrator unit is probably not
operating. If the further indication
pilot lamp is not lighted of the same fact.
this
will
be
a
To replace
move the end taking out the
the vibrator,,unit in the of the ease on which the four screws which hold
power supply relabel is placed by the vibrator shield
can to the framework. The old vibrator may then be with-
drawn and a new unit inserted in the same manner as a
tube.
One or more of the vibrator units should be kept on hand for replacement purposes. It is advisable when servicing the receiver, to try one out in the same manner as a new set of tubes would be tried.
©John F. Rider, Publisher
www.americanradiohistory.com
GAMBI.E-SKOGMO, INC'.
Power Consumption
290 Watts
(At 115 Volts 60 Cycles)
Power Output - - - - 30 Watts Undistorted
Sensitivity
B Range Average C Range Average D Range Average E Range Average
t\
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GAMBLE PAGE 7-17
MODI1<. 26.42.452 RP.Chassie Schematic
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1(CDII. 26-FM-552 A-F.& Power Unit Schematic
Tuning Frequency Range
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GAMBLE PAGE 749
©John V. nide r, Publisher
www.americanradiohistory.com
PAGE 7-20 GAMBLE
MODEL 26-FM. -552
GAMBLE-SKOGMO, INC. Chassis Views
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OSC. TRACKING°
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INTERSTAGE PRI. SECTION I
LI,0 E -RANGE INTERSTAGE
PLATE REACTOR ANTENNA
Voltage, Trimmers Switch Data
OSC. SECTION I
CJ yy-ERANGE 05C. COIL T IO
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INTERSTAGE SEC. /SECTION
-E-RANGE INTERSTAGE R.F TRANS. T4
_ INTERSTAGE PRI. SECTION 2
BOTTOM OF R. F CHASSIS
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Fig. 6-Trimmer Location
Fig. 5-Bottom View of Chassis Showing Coil and Switch
Section Location
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©John R. Rider, Publisher
www.americanradiohistory.com
GAMBLE PAGE 7-21
GAMBLE-ShOGMn, INC.
Circuit
This model is a four band receiver with a eu,eteg range in each band an shown in the specification, above. Four band coverage ú accomplished by means of four sets of antenna, interstage and orellator coils
and a six section four position switch.
Among the many features incorporated in chie re. ceiver -Improved Automatic Volume Control, Ad)uetable Selectivity Content, Dud Volume and Sensitivity Control, Bass Compenator and a 30 Wan High Fidelity Audio Amplifier These are discussed
in the following circuit description.
Referring to the R.P. Schematic Fig. 2, the fol.
lowing are the code numbers of the R.F. and Decd.
Umar Aeeemblirs
TI -Antenna R.P. Transformer
-E T2
Range Antenna R.F. Transformer
T3 -In, Internage R.P. Transformer
T4 -E Range Interstage R.P. Transforma
T5 -2nd Intergage RP. Transforma
TO --Oscillator Inductors
TIO-E Range Oscillator SNuctme
The standard wave, le, 2nd and 3rd short wale coils each assembly are indicated by the lefts B, C,
D and E, respectively. The six sections of the band
switch rte designated in the R.P. schematic Fig. 2
and in Fig. 5 as the antenna arion, interstage pei'
mary section 2, intrsage
in
laage secondary section, oscillator sectaiocnt nand osei'
ter section I.
The band switch completes connection to the coils M nee. It alto short circuits the antenna R.F. trou
former
secondaries, the end secondaries
ratage transformer pri-
and the oriallator coils of
lower frequency, not in use. .
The antenna transformer with tuned secondary feeds into a type 6K7 R.F. amplifia tube. The out
put of this tube is fed into a double tuned A.P. gage. The output of the latter actuate. the control grid of a 6K7 tube which function, as the Ist detector.
A separate type 76 tube is employed in the oecil' lator circuit. The oscillating circuit is always eraom
a frequency which it 456 KC above the Ire. quency to which the R.P. aoapliór is tuned.
The oscillator potential is fed into the cathode
circuit of the 6K7 first detector tube. As a result of the bating of the two frequencies, the intermedt-
ate or bat frequency of 456 KC is present in the
plate circuit of this tube.
Two gaga of I.P. amplification are employed usa' ing 6K7 tuba. The primaries and secondaries of the
first and second I.P. transformers and the primary of
the 3rd I.P. transformer are tuned by small trimmer
con
.
Referring ro the Im end 2nd I.P. transformera and T7 in Pig. 2, it all be noted that there are
coupling windings below the primaries.
When the relativity control es en the &harp poor ton, the coupling winding is open circuited and the
loase coupling which eeiete between the pnmary and
secondary ot this transformer roula in high lee tivsty. When the selectivity control ú in the broad position, the coupling wending which is wound undo
the primary is connected in series with the secondary.
This provides overcoupling which results in a greedy widened reaotunce curve. Pansage of a wide range
of audio frequenetee is thus obtained.
It A dual manual volume control . employed. In
one
the audio voltage applied to the audio
tube úmvnaned (RS) In the elm section the R.F.
and 1e I.P. bin is caned (R2). The purpose of the
latter section is to reduce the sensitivity of the re
ceiver at low volume settings in order to cut down
noise pick-up between nation.. The.variable section
R2 is shorted out by the band selector switch when
at te in the Range D and E positions.
The plate of the pentode section of the 6F7 tube is connected through the "B" power cable to the
other ads of the primary of the push'pull input traneformer.
The A.V.C. system used in this receiver is one which has a fiat characteristic over extremely
fi wide input range As m ned above, it ill bq
seen in Fig. 2 that one the 3rda IF. transformer secondary windings works into the 76 A.V.C. diode
tube. A menai pacing through this transformer will
cult
voltage across diode reuses RI9. This
s voltage applied the control grid of the 76 A.V.C.
ampkóer.
Referring now to Pigs. 2 and 3, there is a diode
circuit
ptoonwgr of the A.V.C. amplifier voltage
winding
transformer TII (sixth winding
from top) the plate and cathode element of the 45 hike rettfer tube and resirton R22, R23 and P24.
The dinde current flowing in this circa establishes
a drop across these resistors. This voltage is below
ground and furnishes operating voltages for the 76
A.V.C. amplifier tube which functions as a DC am-
plifier. Luder no signal conditions, ehe plate of this
tube ie at ground potential. The grid es at the volt.
age of the maximum negative voltage end of resistor
R23 while the cathode 18 at the
negative
voltage end of this resistor The resulting bise vola
age hnngo thistube below the cutoff point and no
plate current flows
When . signal of a predetermined value or greater
flows in the fed I.P. transformer, the voltage natal, tithed across diode resistor RI9 reduces the bias
voltage of the A.V.C. amplifier to the point at which plate current flows in this tube. The plate current
establishes a drop en resistor R25, lowering the plate voltage be the amount of this drop. The plan of the A.V.C. amplifier tube ea connected to the con, tr l grid dreuets of the R.F. and let I.P. tubes, re,
suiting in A.V.C. action.
The ouput stage employe four type 2A3 robes arranged en push'pull parallel" Fixed bias volage for these tubes is obtained from a diode ormet in
which are the output bus winding of power trans
former TI I (fifth winding from top) ad the grid
and cathode elements of the type 45 bias rectifier tobe. 30 watts of undistorted output may be oh rained. TWO 12" auditorium type dynamic spoken are used. Each speaker is provided with deneetúie vanes for the purpose of spreading the directional
higher audio notes through the entire room.
Two type fZ3 tubes connected in parallel are used 2s "B" power rectifiersn the power unit. There are
2 rower transformer assemblies, TII and TI2. In
assembly 711 the top 4 windings illustrated in Pig. 3 amply the tube hater and filament cokages and ehe pilot lamp volages. As mentioned, the fifth winding supplies the output stage bias voltage and the
sixth winding supplies the A.V.C. amplifier tube voltages. Assembly T12 applies thc"B" voltage.
To redue hum, DC es used in the hater circuit» of the 617 and 687 tuba. The 2 heaters are on, nectd in ranee in the negative "B" hoes
The 45 bias rectifia tube, mention of which has
already been made, has two functions. The cathode and grid cements act as a diode applying bias volt
age for the output tubes. The cathode and plate
elements act as a diode &implying opeiming voltages for the A.V.C. amplifier. The two aaeoneatd tears former windings must be in phase and wired as per
the color ode in the A.P. Schematic, Pig. 1.
The phono short circuiting plug, which it in the
phono socket completes the signal diode circuit con,
Phonograph circuit connectionnss a n
plaind in he article under that
in this
manual.
The 3rd I.F. transformer has 2 secondary wind,
mgt. One of these windings works into the diode section of the 6B7 agnat diode. The other wnding works into the 76 A.V.C. diode.
The audio voltage developed by the signal diode across plume control resit[or R8 es va tied through the movable arm to the control gnd of the pentode section of the 6B7 tube, which acts ae a one nage audio amplifier. The pentode plate of this tube is connected through the "B" power able to one side of the primary of the puah'pull input tram former in the power stage.
Metal Tubes
One type of the new metal tubes ú need in this
receiver, namely the 6K7. This replace. the type 6D6
glass tube. This metal tube operates at the sain
voltages and Is nearly identical in characterise. to
the corresponding glaze tube which it replats. In
Peg 7 are ehown the metal tube pin positions from a
bottom racket
.
The shells of metal tubes got quite hot and users shmdd he cautioned against touching them.
The audio voltage developed across volume control
resistor R8 is also applied through the movable arm
o the control grid of the triode action of the 6F7
bass amplifier. A resistance capacity filter composed
of condenser C36 and C37 and retinae R14 en the
triode plate circuit of thin tube bypasses the higher
audio frequencies. The lower audio frequencies
which pass through thee filler develop a voltage
across
ore R38, R17 and RIB.
R17 iitsthe bass note control and is connected
mechanically to the mantelvolume control. The
movable arm is connected to and applies the bau
audio voltage to the control gnd of the pentode ac-
tion of the 6P7 bata amplifier. At high volume set
tines the movable arm is at the low potential end
of 617 (near RIS). At low volume errings tee at
rear... the other end of this resistor in order to
the bassnote
The reason for the increase
in low note response is that ehe chaeacterietla of the
registerate ear are h that the loot
as the middle
e
et heardlevelsw. ell
lower volume
tat Start Wave Send-GGrereeen Polk.. ATaesun. nacho.. sad shim
Sae,kerd Wae.SeM-Pa,pla eoadr.ulry Sbtom Cmmm..ly Manrd. I.li..
Phonograph Connections
A phonograph socket is provided on the R.P. chassis by means of which phonograph connections can be made without electncal changes in the chassie. The receiver e shipped from the factory with a plug n this socket. If no phonograph á used the plug muet be enaerted as et completes the signal diode cir, cuit for radio reception.
Two acte of accessories are applied for phono, graph connections for this model. One set is und when the phonograph is contained in a separate cake'
and the other set is cad when the phonograph and radio are in a combination cabinet. The electrical connectons are the same in both cases and arc dlumratd en Fig. 11 (A). Paru required en either case are shove in the pans list in this manual.
aM sawn Woes nene-Red Iae.rwemel thee' Wave stauam, Aweesan.M ship
3rd Shen teo.Wey
Wee. Send-óoen Pan. Aweewr eW
4grimentel
arillúne
Phonograph in Separate Cabinet
For the assembly. a 5 conductor cable and a small metal panel assembly ere supplied. Thu assembly has the radio'phmm switch, tip jacks for pickup leads and terminal plate for phono able.
The phono panel ie mounted at the mou convenient place in the cabinet at which connections n be completed. The weds u se cured to the motor. board ea illuevated ne Fig. 14.
The eocket at the end of the able is secured to the terminal plate on the panel and she plug at the other end of the cable is uuerted into the phono socket on the R.P. ehae.
When the switch is thrown to the radio aide, the phono pickup ie excluded from the signal dinde
sia circuit. When it is thrown to the phono side, the gn diode circuit es opened and the phonograph connections completed to this circuit. Renimor P23 is short circuited. This brings the grid and cathode of the 76A VC. amplifia to the tame potential and
a nlaee currentin this tube of sufficient in a mity to bring the R.P. and In I.P. tubes to the point of c off (See article on it for furthern formation regarding operation of A.V.C. system).
Phonograph and Radio in Combination Cabinet
For thus assembly, a number of separate items as
shown in the paru bat are supplied. The phono short
circuafter ting ug supplied
the receiver is wed
ceerrttaainincl hang ahave beenmade,
Fern take off the shell of this plug by twisting the
shell in either direction. The shell is then drilled and equipped with a rubber grommet as shown in
Fig. 13 (B). Next unsolder and remove the jumper wire (rom the plug as shown in Fig. 13 (A). En tend ehe leads through the hole in the shell and alder the lade to the prongs on the plug as illustrated.
Complete the connections to the switch and tip jacke as honer The switch ismounted on the motor
board and the tip jacks at then teat convenient
place.
The description of ehe
as given for
the separate phonograph cabinemt also applies to the
combination.
alC1 Alignment and Calibration
Correct alignment e extremely important in
nection with all'wave re
The receivers
all properly aligned at the factory with precision in
stamen and realignment should not be attempted
unless all other possible causes of the faulty operation
have first been investigated and unless the service
technician has the proper equipment.
A signal generator that will provide an accurately
calibrated signal at ash, 1730, 1500, 600, 5800, 5000,
18,300, 15.000, 6000, 48,000 and 40,000 KC and an
output indicating meter are required. It will be prao'
ically impossible to align the receiver if unsatisfactory
appaatut is used. If a station te tuned in with the
selectivity control the broad poweten and this
eel is then turned m the sharp p
the
may disappear. This it
an indication that the
receiver es out of alignment.
Use a nonmetallic screwdriver for the adjustment. The complete procedure is as follows:
I. F. Adjustment
Set the signal generator for a agnat of 416 KC. Connect the output of the egnal generator to the gnd of the 1st detector through a 0.1 mf. condensa.
Connect she ground lead of the receiver to the ground post of the signai generator
Tun, the band selector to the Range B position (standard wave band-purpk dial color).
Turn the »electivity control to the sharp poation and keep it in this position for all adjustments.
Turn the volume control to the maximum position.
Attenuate the signal from the signal generator to prevent the levelling'og action of the A.V.C.
Then adjust the five I.P. trimmers untel maximum output ie obtained. The adjusting screws for these condeneera are reached from the top of the chases, and the location le shown in Peg. 4.
Range B Alignment
1730 KC Adjustment
Set the signal generator for 1730 KC.
Turn the rotor of the tuning ondwer to the full
open position.
Keep the band selector in the sandard wave pot'
tion.
Connect the antenna lead of the weever through a 200 mmf. condenser to the output of the segnai
generator.
For vol
this and all subsequentadi
control at the muaximum
enno keep the and attenuate
the signal from the signal generator to prevent A.V.C.
action.
Adjust the oscillator Range B trimmer (C54) until
munnum o spot es obtained. The location of Ihie trimmer es Mown IR Fig. 6
1500 KC Adjustment
Set the signal generator for 1500 KC.
Turn the ro of the
g condense .fully
until m
output is obtained.
the pointer ea ecrew and set the larger
ponterat the MO KC mark on the standard
band scale. Re'tighten the rat screw.
Adjust the let end 2nd interstage Range B vim. men (CI7 and C18) and annota Range B trimmer
(C3) to
Do not change the setting of the oscillator Range
B trimmer.
Nlak Yol.r
Tepee
CM..t
fJp.
Stele. Selector
Caserol1ey
S-Sharp S-Lead
0.-041 Switch L yola... CaNret
I-Lwae,on and Pumrion el Connote
600 KC Adjustment
Set the signal generator for 600 RC.
Tuns the tuning condenser rotor until maarmum output e obtained.
Turn the rotor slowly back and forth at the same time adjusting the 600 KC trimmer until the peak of greatest intensity is obtained. See Peg. 6 for locati of chie trimmer. oBne eure to ore a nommeallec rrewdnver for this adjustment,
MODEL 2641e0-552 Circuit Data Alignment, Phono.Data
Range C Alignment
5800 KC Adjustment
Set the signal generator for 5800 KC. Connect the antenna lead of the receive, through a 400 ohm resistor to the oatpm of the signal gene
rata.
Turn the rotor of the tuning condenser to the full open petition.
Tun, the band selector to the Range C portion (Ist short wave hand-green dúl color).
As mentioned above, keep the volume control at ehe maximum position and anenuate the signal from the segnai generator to prevent A.V.C. action
Adjust the oscillator Range C trimmer (C56) until maximum output is obtained. See Pig. 6 for loation of this trimmer.
5000 KC Adjustment
Set the signal generator for 1000 KC. Turn the rotor of the tuning condenser carefully until maximum output is obtained.
Adjust the Ist and 2nd inemntage Range C tom. mers (Ce6 and C19) and antenna Range C trimmer (C4) to muimum.
Do not change the setting of the mediator Range C tnmmer.
Range D Alignment
18,300 KC Adjustment
Set the signal generator for 18,300 KC
Keep the antenna lead of the receiver connected through the 400 ohm resistor to the output of the reg. nal generator.
Turn the rotor of the tuning condenser to the full open poateen
Turn the band selector to the Range D potion (2nd short wave band-red dial color).
As mentioned above, keep the volume control at the muimum position and attenuate the agnat from the signal generator to prevent A.V.C. action.
Adjust the oscillator Range D trimmer (C57) until maximum output is obtained. See Fig. 6 for location
of this trimmer.
15,000 KC Adjustment
Set the signal generator for 15,000 KC. Turn du rotor of the tu g denser carefully until maximum o tput ú obtained
Adiase the 1st and 2nd interstage Range D trim mere(Cif and C20) and antenna Range D trimmer (CS) en
When adjusting the 2nd interstage Range D trim. mer, it will be necessary at the same time tu turn the tuning condenser rotor slowly back and forth used the peak of greatest inanity ú obtained.
Then go back and repeat the procedure es given for the 18.300 KC adjurtment. If it ie found nets. eery to make any appreciable change in the setting of the oscillator Range D trimmer, the 15,000 KC adfustment mum be repeated.
Do not make any further change in the setting of the oscillator Range D trimmer.
6000 KC Adjustment
Set the signal generator for 6000 KC. Turn the tuning condenser rotor until maximum output is obtained. Turn the rotor slowly back and forth at the same tirne adjusting the 6000 KC trimmer until the pais of greatest ente ty es obtained. See Fig. 6 f location of this trimmer. Use a non.metallec ecrewdnver for this adiuutment
Range E Alignment
48,000 KC Adjustment
Set the signal generator for 48,000 KC.
Keep the antenna Iad of the receiver connected
through the 400 ohm resistor to the output of the sggenerator.
the rotor of the tuning condenser to the full open position
Turn the band electot to the Range E position (3d short wave bend-brown deal color),
Adjust the
Range E trimmer (C50) until
maximum output ú obtained. See Fig. 6 for Iodation
of Ihú trimmer.
40,000 KC Adjustment
Set the signal generator for 40,000 KC.
Turn the rotor of the testing condenser arefally until maximum output is obtained.
Adjust the interstage Range E trimmer (C14) and
antenna Range E trimmer (C6) to
the Do not change the setting of
ouilla or Range
E [rummer.
Switch Contact LocatiioonhcoNnutmacbt ering
aBement for
n
numbering has been adopted. This numbering
illustrated in Fig. 9. In
ce locations not wed,s
the number applying ro that particular location u na
employed.
Twenty -By' Cle Receivers
The tweeey.óve cycle receiver differs rtnm else
sixty cycle receiver in the fact that special twenty five
cycle filament and "B" pewee traneftmnea muse be
need It also has two additional condensen in the power unit-C67 and C68 as illus rated en Fig. 3. The twenty'five cycle transformers and the condensers are donne in the parts leu.
The twenty'five cycle receiver can be operated satisfactorily from a sixty cycle power supply if the
two condeneers C67 and C68 are removed. How-
ever,, the reverse nottrue, that is, a sixty cycle cannot be operatedfrom a ewenty'five cycle
pnwr apply.
111230 Volt, 40 to 60 cycle filament and "B" power tra,esformen are also avalabk for this model.
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-22 GAMBLE
MODEL 26-.PM-552Parts
List
GA MBLE-SKOG310, INC.
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©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-SKOGMO, INC.
Power Consumption - - 6.5 Amperes at 6.3 Volts
Power Output
3 Watts Undistorted
U
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GAMBLE PAGE 7-23
MODEL 26-R-1 Schemettio Alignment
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©John F. rider, Publisher
www.americanradiohistory.com
PAGE 7-24 GAMBLE
IdOI)II. 26-R-1 Voltage,Socket
GADIBL.E-ShOGMO, INC.
TrimaerB,COlOr Code
em4
Resistance,Mounting
ANTENNA R.F TRANS.
VOLTAGES AT SOCKETS Antenna Diseoaaeeted Battery 6 Volta Under Load
Type of
Tutee
Function
Across Plate
Heater ;rot"und
('ante dt Cathode to Current
Ground M. A.
(1D(i R. F. Ainp.
5.8 220
45
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5.8
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5.8 130111
1.2
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5.8 210 220 1úu'1 25.5
5.8
50.0
111 A11th 250.161 Ohni Meter
21 A. read across filter choke.
INTERSTAGE R. F TRANS.
OSC. COIL
,a.. ö 05
Fig. 3-R. F. and Oscillator Coil Base Terminal Arrangement and D. C. Resistance of Windings
D. C. Resistance of Windings
Following are the D. C. resistances of the various windings in the chassis. The values given below will vary
slightly in different sets.
Part No.
Winding
í'Q.\443 P.9A4.t9 P °A441
Antenna Transformer l'riniars Winding Secondary Winding -Either Portion
Interstage Transformer Primary Winding Secondary Winding --Either Portion
1st T. F. Transformer ..... ...
Primary Winding Secondary Winding
P-9.\442 2nd 1. F. Transformer Primary 1\'.ndine
Second.irs Winding
Code
TI
T2
T3
T4
D. C. Re aiataec* in Ohms
... 8.7
1.0
44.4 1.4
9J5 97.6
44.1 49,6
Part No.
Winding
P -12A227 Dynamic Speaker Output Transformer Primary . Output Transformer Secondary Speaker Field Speaker Voice Coil
P -9A440
Oscillator Coils (:rid Coil I.onR Portion Short Portion Plate Coil
P -53X108 Power Transformer
'
Primary Winding
Censer Tap to Inside
Center Tap to Outside
Secondary W'indin
Center Tap to Inside
Center Tap to Outside
P.9A444 Motor Noise Reactor
P -9A448 Pilot Light Line Reactor
P 94446 Filament Reactor
P.52X42 P.QA447
Filter
R. F.
'BCh"okePlate
Reactor
P 9A445 Vibrator Filter Reactor
Cods T5 T5
1.3
T6
T7
LI .
L2 IA
TA 1.6 1.7
D. C. Re-
O. sistance
la
416.6
Small
5.3
Small
3.0 0.9 5.8
Small Small
200. 200.
Small Small Small 3125
4.1
Small
©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-SKOGD°IO, INC
RESISTORS
Part No.
P -A95104 P -A08303 P -A95104 P -A93602 P -B93902 P -A95506 P- 96012 P -A95506 P -A04603 P -A95104 P -A95104
Code
R1 R2 R3 R4 R6 R6 R7 R8 R9 RIO R11
Resistance
100,000 Ohm 30,000 Ohm
100,000 Ohm 6.000 Ohm 9,000 Ohm
6 Megohm I Megohm 5 Megohm
60,000 Ohm 100,000 Ohm 100,000 Ohm
Wattage Type
.2 Carbon .2 Carbon 2 Carbon .2 Carbon .6 Carbon .2 Carbon ..
Volume Control .2 Carbon .2 Carbon .2 Carbon .2 Carbon
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GAMBLE PAGE 7-25
Ms EL 27-C-1
Schematic, Voltage
Socket,Parte
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www.americanradiohistory.com
PAGE 7-26 GAMBLE
MODEL 27-C-1 Alignment
GAMBLE-SKOGiNIO, INC.
Resistance Drive Cord Data
Condenser Alignment
Misalignment or mistracking of condensers generally manifests itself as broad tuning and lack of volume at portions or all of the standard wave band. The receivers are all properly aligned at the factory with precision instruments and realignment should not be attempted unless all other possible causes of the faulty operation have first been investigated and unless the service technician has the proper equipment. A signal generator that will provide accurately calibrated signals over the standard wave band and at the intermediate frequency, and an output meter are required for indicating the
effect of adjustments.
First set the signal generator to a frequency of 175
KC. Connect the antenna lead of the lead generator
to the grid of the 1st detector thru a .05 mfd. condenser.
The ground ground lead
lead from the signal generator goes to the of the receiver. Adjust trimmer condenser
C9 on the back panel of the chassis until maximum out-
put is obtained., A non-metallic screw driver should be
used in making
B+ potential.
this
adjustment
as
the
I.
F.
trimmer is
at
rtahonetNtoeersnxingttaonsaleltehtagedtehnefoueflrslatihgtooenpraerleniscgeepiinnvoeestirrht.aiiotsonAr.indfsTojtuarhsnet1c7eat3hn0ectoetnKnrninCmea.cmtleeeTdarudrtonoffrottthhhmeee oscillator section of the 3 gang condenser until maximum output is obtained. The oscillator section is the one with the cut plate rotor.
Then set the the rotor until
signal generator maximum output
for 1400 KC and turn is obtained. Adjust the
other two trimmers on the gang condenser for maxi-
mum output.
To obtain dial scale calibration tune in an 800 KC
signal and set the dial pointer at that mark on the dial
scale. When calibrated in this manner, be approximately correct at both ends of
the the
setting scale.
will
The use of the cut plate type of condenser eliminates
the necessity of a 600 KC at this frequency, therefore,
padder and is required.
no
adjustment
Replacing Drive Cord
Remove chassis from cabinet.
Take sockets
off the pilot light and spring clips.
assembly
by
lifting
off
the
two
Detach the large pointer the center of the dial.
by removing
the
screw at
Loosen the which secure
dial assembly the bottom of
by taking out this assembly
the two screws to the chassis.
in
Then front
lay the complete of the chassis. It
dial assembly face is not necessary to
downward remove the
volume control and Off -On switch collars which hold
the indicator cords of these two controls in position.
Turn the drive drum until the opening in this drum is approximately vertical and with the hole at the top as shown in Fig. 4.
Remove the tension spring and the old drive cord.
See that the eyelet is in the hole in the drive drum as shown in Fig. 4. Insert one end of the drive cord from the outside through the hole in the eyelet in the drive drum.
Tie the end of the cord which has been inserted in the hole to one end of the tension spring.
Wrap the cord in a clockwise direction (facing front of chassis) around the drive drum approximately onehalf turn.
Then tilt the chassis up on its back panel and bring the cord mentioned in the previous paragraph down to the drive shaft. Wrap it two and one-half times around the drive shaft as shown in Fig. 4.
Then bring this cord up from the drive shaft and wrap it around the drive drum approximately one and one fifth turns in a clockwise direction until it is up to the hole in this drum as illustrated.
Insert the free end of the cord through the hole in the eyelet and tie it to the end of the tension spring. The end of the spring, when hanging free, should be approxi-
mately %" from the flange of the drum as shown in rig. 4. Cut off the surplus length of cord after it is knotted.
Then secure the other end of the tension spring over the spur on the drive drum.
Replace the dial assembly and pointer.
Replace the pilot light assembly after which the chassis may be reinstalled in the cabinet.
Fig. 3. Four Section Condenser in Power Unit Box
D. C. Resistance of Windings
Following are the D. C. resistances of the various windings in the chassis. The values given below will vary slightly in different sets.
Part No. P-5200
P-5169 P-5170 P-5171 P-5172 P-5173 P-50621 P-50622 P-5222 P-50625
P-2010
Item Double Tuned Antenna Transformer,
Primaries in series Double Tuned Antenna Transformer
Secondary Preselector Double Tuned Antenna Transformer
'Secondary Detector Oscillator Grid Coil Oscillator Plate Coil . I. F. Coil Primary I. F. Coil Secondary I. F. Reactor Coil Plate W--.nding. I. F. Reactor Coil Grid Winding Double Filament Reactor Assembly each section
Combined Filament Reactor Assembly each section _
Audio Plate Reactor ...
Iron Core Isolating Reactor Filament Reactor ... _.. Audio Transformer Primary Audio Transformer Secondary
(center tap to inside) Audio Transformer Secondary
(center tap to outside)
6" Magnetic Speaker (center tap to Inside)
6 Magnetic Speaker (center tap to outside)
Code
D. C. Resiatance in Ohms
T1
20.1
T1
8.3
T1 T4 T4 T2 T2 T3 T3
Ll, 1.2
3.1 8.6 1.6 89. 126. 99. 429.
Small
L3. L4 L5 L6 L10 T5
Small 4940.
Small Small 1066.
T5
614.
T5
666.
260.
300.
©John F. Rider, Publisher
www.americanradiohistory.com
GAJI13LI:-ShOGMO, INC'.
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GAMBLN, PAGE 7-27
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PAGE 7-28 GAMBLE
]SEL 31-HT
Alignent Parte List
(=AJIBLE-ShOGMO, INC.
1
"Coronado". Model 31BT
Service Notes
For The
Six Volt Battery Operated
Six Tube Superheterodyne Receiver
gnment of this receiver should never be necessary unless one of the oscillator, antenna,
osdgctuhiirovfconfeIhred.noFre,eau.nnsIIgosfTcthewtohrlaime,yelInasSerakwtinchIn..iIuaovFsMsfree.UasPdcbttnteuhtEiedugfbeeReeraneercArteetriinTdcsevtohepIeViralavecanntEepciudrerlbcatdTeuhchw.smeeHa,idvlsAlbLoetaailnTaatntecbctckeekiAiesernsynNosafestdohdhnsAvreeosei,fCiusnsitarlnipCsdevbiieUcttilaeietervyRlkeiyivetaAtoaeryl,inTpr,g.rdriEneonaILamvnatthleYddieeniegsnqnptdCunoiimAbtaooahetlrtLepecIotatBooaoItr.tnltrRFeiaebbe.mAnerxtqaTapcttumewEthieaoseDhpdslnieiltvcinOyfaweeuSulariymnsCllleitIalgi.poLlybnaneLirgnbAtaeigilncaTlucndtOooltuaeRorernrctlehnayBcteraotEer,.fiuaofUnplplSteyoyhnEsefDsoooinbrrlelWelogepworIloTarusctHohnaeudemSrecpceOdoenrmMostbcbiEeatiuhnsdTbaaurYvtereieeosPniiEissntboooOetrfhen,FneecbayOouopfrUsfiaderTsessas-tr,
PUT MEASURING DEVICE.
INTERMEDIATE 1. Connect
condenser. Leave
ALIGNMENT: the high side of the test oscillator output to the grid cap connected to the grid terminal
the control of the tube,
grid and
of the connect
106 the
modulator tube through a .02 Mfd. 'ground side of the test oscillator to
tTfatmhohnOeleedloterttwArrre,iacLm234t1neha....IsimefGvftoeCeNeSAAprrrreorlmdotingwcjgcTnuerontehoersHhndictutedcEuhtsnhethrtedhnteeih.eesassVeeltcdedrAcafjsshoiuorRriesnsslgfucIotdthuAipclliaitlBlnohanytaeLttuetn,eoedtEdrrpromomuutfthrdnteheCeeoddedqsrOwireiiwuadarNntenetiteesrnDeie(caomtEtiyrttfnrhhNamactenntSrhoestesEehrfrafoRe4eost6csrir:ecncm5emshrgiteveaekwesrrioaIslrsotsnibiscwcndyioyiilwlfscltdtlaulhieetltreboilhcsnmerrebiesn(pteiaathgnshomsrarsiiroemnseoetuafngneemngmesrithcurtaotiaesrnwfvpadatnehante4hbectsr0oeaneift0noyabatadrs)oyrlcmihitmctgtmhuheuhnemnerreitanrieifrsdetlgoreesifarc)imust.slohcntnamoecrcxdearatiwgilmxoiItaibso.numnFrmagaat.uhctsmitcecoreriaonnesrnnssdeasdeicdiwbfcneeioliannsielrtvilsgemteeti.dhbrvrei,ersiroato.pyninuoan.tgbdcetthdhonaierninrnhaegceocidllrteea.csanuoddiinTtnathdntrtehiidhameegptmrhoataedouempdtrpl.ionuotwogtf
side to the set ground. 2. Place the band selector switch
for operation
on the
6.8 to
18
megacycle
band,
tune
the
receiver
dial,
and
set the
test
oMpApiooauftifrmrpfsesrseNiAoeccaptmqa1hdipiDkrXgull7emoeslleeIaa,rxaNmMnpettnR3itooorcrmpOh.edUrroonyegetTaepMtaoafaattWeftkcrhentoTtureyemoledinqyHcOwtpEigdhulutnEee1iU1Xuaaeslai8s7lnemmnnTbA,kgIecaPmmuMeibaCysnhUmnnectTeedAahdtottggTLasouetnGaaclsuYnidccabeEfnEreByypeaeledeetXnncceaYch1dcPnllcdseA6eeieteiEniostAturvCi.yMAhrfnose,uoDTes.eKsrEnonsdLctIJwhGdidf.iUYtmtAleIihaAhilaStSntameahflacC1tTtgeThotee8UrsteYIoeronrcNptScsCrtMrplaeiEedateGcaLmerltiowpEoDtivaEempmmGkpefsTtSrdorehmApoFeoHwarailxrOdwsCakeerEiiinoelrtRnaYmillidwspLenCcmabteag1aAshoateLvr8scueemadLeErlIsatjnueyMfIiptSuttdwGosohrl.isejEteint1beeNutimdtc7GdeesiIeto1smtlNAiedymm6dpnnGns.eCoreetooroaMwC5Ygnutlp.oaTn8iAt(CEtegscapHGRrLcdynboootliodEcEieEysAfflnlslyeaCigc1omtbOrsth8aMRYeno.lepeSeaadErCmsUaCdthCfcLoTteSjIrtoiu1LgshEEehTta8csyaqeLeInrtic)VuneelAdABmylcepdaEcTuNeEnvoe.ttlRinOochgeaiTvntyrraeReiTEytclnbAtaAyNattrwTTtthhcniKhNtmleeRdhue1eEAen8Ism1fstMNreu8iriemtregeTnhMsrcineetMtenReTahEgaiplIetHEatv,RtMtheehcGeAe.asyfter1MkhtAiTc8rredlesCEWewonic1tasmRYsT8ehh,lctipHiCeehivcielgnsFneMLhEelalaacOriEkcatEgrifoRysSedduFhGrac.iijntUtsasluAlhMedelyssNesCairtAgAaeimDttYnnfnhocaXluAdgeeCwelawnIniltLMavMhdosttayeaEehewauyEUsdltimtsis,NplMrtlpeSbiueTttcgenahrItsbhAaGhicttee1emaokkt6cNLlofhkmiawsAnatMeonchencPaaLftidefEorosdlrEldrGattArttlnweTsteAhheoeoKasOcfoeere-ttttt
CYCLE SIGNAL SENSITIVITY. 4. Place band selector switch
for
operation
on
1.8
to
5.8
megacycle
band,
tune
the
receiver dial,
and
set
test oscillator
frequency to EXACTLY 6.8 MEGACYCLES.
Rotate gang condenser so that plates are completely out of mesh and BRING IN 5.8 MEGACYCLE SIGNAL TO MAXI-
MUM OUTPUT BY ADJUSTING THE 5. MEGACYCLE OSCILLATOR TRIMMER.
the
5. Leave the band test oscillator frequency
selector switch for operation to approximately 2 megacycles.
on the 1.8 to 5.8 W hile rocking
megacycle band and the gang condenser
tune the receiver dial and set slightly to the right and left,
adjust the 2 megacycle oscillator padder condenser for maximum sensitivity.
6.
switch for
Replace the 400 ohm operation on the 535
resistor to 1720
in series kilocycle
with band
test
and
oscillator set test
lead with a 200 mntfd. condenser, place the band selector oscillator frequency to EXACTLY 1720 KILOCYCLES.
Rotate gang condenser so that plates are completely out of mesh and BRING IN THE 1720 KILOCYCLE SIGNAL TO
MceAivXerIM7d. UiaMlWtiotOhEUXbTaAPnUCdTTsLebYlyec1at4od0rj0ussKwtiIniLtgcOh1C7Yp2l0CacLkeiEdloSc.fyocrlAeodpojesucrsaitltliao1t4no0r0otknriimltohmceyecr5l.e35prteose1l7e2c0tokrilaoncdyclaentbeannndastertimtemsterosscfiollratmoraxfrimequumenc1y40a0ndkilroe--
cycle signal sensitivity. 8. Leave band selector switch for operation on 535 to
1720
kilocycle
band,
tune
receiver
dial
and
set test
oscillator
frequency to approximately 600 kilocycles. While rocking gang condenser slightly to right and left adjust 600 kilocycle oscilla-
tor adder for maximum sensitivity.
Pert umber 2166 535-1720 K.C. Band Antenna and Preselector Coil 2173 333.1720 K.C. Band Oscillator Coil 2226 1.8-5.8 M.C. Band Antenna Coil 2227 1.8-5.8 M.C. Band Oscillator Coil 2009 5.8-18. M.C. Band Antenna Coil 2065 5.8-18. M.C. Band Oscillator Coil 2072 First I. F. Transformer 2259 Second I. F. Transformer 2158 Three Gang Condenser 2122 Tuning Dial Assembly 1054 Padding Condenser 1055 Padding Condenser
List PricPeRICESPotARaEmbeSrUBJECT TO CHANGE WITHOUT
11.30
6984 500,000 Ohm 1/3 Wan Resistor
.63
6879 50,000 Ohm 1/3 Watt Resistor
.70
9693 5,000 Ohm 113 Watt Resistor
.53
9769 15,000 Ohm y Watt Resistor
.60
8907 25,000 Ohm 1/3 Wan Resistor
.65
9285 15,000 Ohm 1/3 Wan Resistor
1.55
9431 100 Ohm 1/3 Wan Resistor
1.60
9319 .001 Mfd. Moulded Condenser
3.60
9458 .00025 Mfd. Moulded Condenser
2.00
35
9459 .0005 Mfd. Moulded Condenser 2132 .0027 Mfd. Moulded Condensa
.55
1628 .0045 Mfd. Moulded Condenser
NOTICE
Lut Price $ .19 .19 .19 .19 .19 .19 .19 .21
.21 .21 .21
.21
1331 Audio Transformer
1.40
9386 .1 Mfd. 200 Volt Cond
.19
1928 Bias Cell
2282 Tone Control with Of and On Switch
2198 Volume Control
-22
9203 .1 Mfd. 400 Volt Condenser
1.24 .83
1147 .07 Mfd. 200 Volt Condenser 8961 .05 Mfd. 400 Volt Condenser
.20 .19 .19
2059 2272 2268 2271 2066
Wave Switch 8 & 20 MEd. Dry Electrolytic Condensai Power Transformer Filter Choke R. F. Choke
.75
1551 -002 Mfd. 600 Volt Condenser
1.95
1497 .03 Mfd. 600 Volt Condenser
2.35 1.00
.28
2275 .5 Mfd. 100 Volt Condenser 1666 .03 MEd. 600 Volt Condenser 2073 5 Mfd. 400 Volt Condenser
.18 .19 .50 .18
36
9530 R. F. "A" Choke 2269 Vibrator
,15
2261 Battery Cable (Single Section)
.65
6.00
2262 Battery Clips
.17
2273 Sponge Rubber Vibrator Pod 2430 6.25 Ohm Wire Wound Resistor 1942 500,000 Ohm 1/3 Watt Resistor
.10 .19 .19
8051 Black Rubber Steering 8052 Red Rubber Steering 1333 Sis Inch Speaker
.10 .10 6.23
1943 250,000 Ohm 1/3 Watt Resistor 1944 100.000 Ohm 1/3 Watt Reenter 7998 1 Meg Ohm 1/3 Wet Radnor
.19 .19
1353 Eight Inch Speaker
1739 13/16' Knoll
.19
1740 17/16" Knob.
1794 15/16" Knobs
7.00 .22 .22 .23
©John F. Rider, Publisher
www.americanradiohistory.com
G AMBLE-SIíOGMO, INC.
GAMBLE PAGE 7-29
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-30 GAJIBI.E
MODEL 34 -BT
Alignment
Parte List
M 1) I,h'Sh \ )(TM O. I NC.
SERVICE NOTES FOR TI-f
TWO BAND SIX VOLT BATTERY OPERATED FOUR TUBE SUPFRFETEROOYN£ RECEIVER
ALIGNMENT PROCEDURE: REALIGNMENT OF THIS RECEIVER SHOULD NEVER BE NECESSARY UNLESS ONE OF THE OSCILLATOR, ANTENNA, OR I. F. COILS HAS BEEN REPLACED. LACK OF SENSITIVITY, SELECTIVITY, AND POOR TONE QUALITY MAY BE DUE TO ANY ONE Ok A COMBINATION Of CAILES, SUCH AS WEAK OR DEFECTIVE TUBES, BATTERY, OR SPEAKER, INADEQUATE OR EXCESSIVELY LONG ANTENNA, OPEN OR GROUNDED RESISTOR, BYPASS CONDENSER, ETC. UNDER NO CIRCUMSTANCES SHOULD REALIGNMENT BE ATTEMPTED UNTIL ALL OTHER POSSIBLE SOURCES HAVE BEEN FIRST THOROUGHLY INVESTIGATED AND HAVE BEEN DEFINITELY PROVEN NOT TO BE THE CAUSE. IF AN 1. F. TUBE IS REPLACED IT IS ADVISABLE TO REALIGN THE I. F. AMPLIFIER, PARTICULARLY IF TIE REPLACEMENT TUBE IS ONE OF A DIFFERENT MANUFACTURE THAN THE ONE IN THE RECEIVER. IT IS IMPORTANT WHEN ALIGNING TO CAREFULLY FOLLOW THE PROCEDURE IN THE ORDER GIVEN, OTHERWISE THE RECEIVER WILL LACK SENSITIVITY AND THE DIAL CALIBRATION WILL BE INCORECT. IT IS IMPERATIVE THAT AN ACCURATELY CALIBRATED OSCILLATOR BE USCG WITH SOME TYPE OF
OUTPUT MEASURING DEVICE.
INTERMEDIATE ALIGNMENT: 1. CONNECT THE HIGH SIDE OF THE TEST OSCILLATOR OUTPUT TO THE CONTROL GRID OF THE 106 MODULATOR TUBE THROUGH A .02 MED. CON-
DENSER. LEAVE THE GRID CAP CONNECTED TO THE GRID TER'.' INAL Of THE TUBE, AND CONNECT THE GROUND SIDE Of THE TEST OSCILLATOR TO THE RECEIVER GROUND.
2. SET THE TEST OSCILLATOR FREQUENCY TO 465 KILOCYCLES (THIS MUST BE ACCURATE).
3. ALIGN THE SECOND INTERMEDIATE TRANLF07.ER BY TURNING ONE Of THE TRIMMER SCREWS ACCESSIBLE THROUGH HOLES IN THE TOP OF THE TRANSFORMER SHIELDS UP ANC DOWN (INCREASING AND DECREASING CAPACITY) UNTIL MAXIMUM READING IS OBTAINED ON THE OUTPUT METER, AFTER WHICH ADJUST THE OTHER TRIMMER SCREW OF THE SAINE TRANSFORMER FOR MAXIMUM SENSITIVITY.
4. ADJUST THE FIRST INTERMEDIATE TRANSFORMER IN THE SAME MANNER AS THE SECOND I. F. TRANSFORMER.
TO ALIGN THE VARIABLE CONDENSER: IT IS IMPORTANT WHEN ALIGNING THE GANG CONDENSER, PADDING CONLENDE , AND DAVE TRAP TO FOLLOW THE PROCEDURE CAREFULLY, OTHERWISE THE RECEIVER WILL BE INSENSITIVE AND THE DIAL CALIBRATION WILL. BE ANCOHRECT. THE TRIMER AND
PAWING CONDENSER WILL BE REFERRED TO BY THEIR FUNCTION AS INDICATED ON THE CIRCUIT DIAGRAM.
1. CONNECT THE HIGH OUTPUT SIDE OF THE TEST OSCILLATOR THROUGH A .00025 MFD. CONDENSER TO THE'RECEIVER ANTENNA LEAD AND THE LOW SIDE TO THE SET GROUND.
2. SOME CODE VRAC -AIRCRAFT SIGNALS ARE BROADCAST ON A FREQUENCY THE SAME OR NEAR THE INTERMEDIATE FREQUENCY OF THE RECEIVER. TO ELIMINATE INTERFERENCE FROM THESE SIGNALS A 465 KILOCYCLE ANTENNA FILTER IS INCORPORATED IN THE RECEIVER. TO ADJUST, TURF RECEIVER DIAL TO APPROXIMATELY 1000 KILOCYCLES AND SET TEST OSCILLATOR FREQUENCY TO EXACTLY 665 KILOCYCLES. THEN ADJUST THE 465 KILOCYCLE WAVE TRAP TRIMMER CONDENSER FOR MINIMUM i65 KILOCYCLE SIGNAL RESPONSE.
3. PLACE BAND SELECTOR SWITCH FOR OPERATION ON THE 1720-5U) KILOCYCLE BAND, NOTATE GANG CONDENSER SO THAT PLATES ARE COMPLETELY OUT OF MESH, SET TEST OSCILLATOR FREQUENCY TO EXACTLY 1720 KILOCYCLES, AND AUJuST 1720 KILOCYCLE OSCILLATOR TR1N.Fk FOR MAXIMAL 1720 KILOCYCLE SIGNAL OUTPUT.
4, WITH BAND SELECTOR SNITCH SET FOR OPERATION ON THE 1720-560 KILOCYCLE BAND, SET THE TEST 2,CILLATOR FREQUENCY AN RECEIVER
TUNING DIAL TO EXACTLY 1400 KILOCYCLES. THEN ADJUST 1400 KILOCYCLE ANTENNA TRIN.ER FOR MAXIMUM 1400 KILOCYCLE RESPONSE.
5. TUNE RECEIVER DIAL AND SET TEST OSCILLATOR FREQUENCY TO APPROXIU TELY 600 KILOCYCLES. WHILE ROCKING GANG CONDENSER SLIGHTLY TO RIGHT AND LEFT ADJUST 600 KILOCYCLE OSCILLATOR PAGUER FOR MAXIMUM SENSITIVITY.
6. PLACE BAND SELECTOR SWITCH FOR OPERATION ON THE 2.3-6.2 MEGACYCLE BAND, ROTATE GANG CONDESER SO PLATES ARE COMPLETELY OUT OF MESH, AND SET TEST OSCILLATOR FREQUENCY TO EXACTLY 6.3 MEGACYCLES, BRING IN 6.3 MEGACYCLE SIGNAL TO MAXIMUM OUTPUT WITH 6.3 MEGACYCLE OSCILLATOR TRIMMER.
7. WITH BAND SELECTOR SWITCH ON 2.3-6.3 MEGACYCLE BAND SET RECEIVER DIAL ANO TEST O5G I'IA TOfR FREQUENCY TO EXACTLY 5.8 MEDA. CYCLES. ADJUST 5.8 MEGACYCLE ANTENNA TRIMMER FOR MAXIMUM 5.8 MEGACYCLE SIGNAL RESPONSE.
8. LEAVE BAND SELECTOR SWITCH FOR OPERATION ON THE 2.3-6.3 MEGACYCLE BAND, JUNE RECEIVER DIAL AND SET TEST O:,CILLATOR FREQUENCY TO APPROXIMATELY 2.5 MEGACYCLES. THEN WHILE ROCKING GANG CONOENSE.R SLIGHTLY TO RIGHT A":D LEFT ADJUST 2.5 MEGACYCLE PADDING CON-
DENSER FOR MAXIMUM SENSITIVITY.
PRICES ARE SUBJECT TO CHANGE
PART NAJMBER
LIST PRICE PART I- ASER
WITHOUP NOTICE
LIST PRIDE
2252 2185 2167 2186 2187 2072 2259 2053 2121 2260 2239 2165 2047 1928 2268 2271
9539 2066 2269 2273 2258 1962 1943
7998 8000 6879
ANTENNA FILTER COIL 540 TO 1720 KILOCYCLE BAND ANTENNA COIL 540 TO 1720 KILOCYCLE BAND OSCILLATOR COMA 2.4 TO 6.2 MEGACYCLE BAND ANTENNA COIL 2.4 TO 6.2 MEGACYCLE BAND OSCILLATOR COIL FIRST I. F. TRANCFORAER SECOND I. F. TRANSFORMER TWO GANG CONDENSER TUNING DIAL ASAEANBI Y COMPLETE VOLUME CONTROL WITH SWITCH TONE CONTROL WAVE SNITCH BIAS CELL MOUNTING STRIP BIAS CELL POWER TRANSFORMER FILTER CHOKE R.F. AMA CHOKE R.F. CHOKE VtORATOR SPONGE RUBBER VIBRATOR PAD WIRE WOUND RESISTOR STRIP 500.000 OHM 1/3 WATT RESISTOR
250.000 OHM 1/3 WATT RESISTOR
1 NEGOHM 1/3 WATT RESISTOR 100.000 OHM 1/3 WATT RESISTOR 50.000 OHM 1/3 WATT RESISTOR
f .65 .80
.55 .70 .35 1.55 1.60 2.65 2.25 1.20 .80 .70 .11
.22 2.35 1.00
.)Ó .28 6.00 .10 .40 .19 .19 .19 .19 .19
8907 6786
9765 1176
9706 1054 1055 8876 9458 9459 7934 1628 1666 2275
9386 1147 1148 9032 2261 2262 8051 8052 2277 2278 1740 1739 9023
25,000 O- 11/3 WATT RESISTOR 10,000 OM1 1/3 WATT RESISTOR
15.E OM 1/2 WATT RESISTOR
10,000 OFf1 1/2 WATT RESISTOR 1.500 OHI 1/3 WATT RESISTOR PADDING CONDENSER
PADDING CONDENSER 5 MFD. DRY ELECTROLYTIC CONDENSER
.00025 UFO. MALEED CONDENSER .0005 WO. MOULDED CONDENSER .0001 MFD. MOULDED CONDENSER
.0045 MFD. MOULDED CONDENSE' .02 MFD. 600 VOLT CONDENSER .5 IRO. 200 VOLT CONDENSER
.1 FO. 200 VOLT CONDENSER
.05 MFO. 200 VOLT CONDENSER .5 MEO. 200 VOLT CONDENSER .2 MED. 200 VOLT CONDENSER BATTERY CABLE (SINGLE SECTION) BATTERY CLIPS BLACK RUBBER SLEEVING RED RUBBER SLEEVING 6W MAGNETIC SPEAKER Sil MAGNETIC SPEAKER 15/16 KNOBS 13/16 KNOBS 6.3 VOLT .15 AMPERE PILOT LIGHT
iS .19 .19 .19
.19
.19 .55
.55
.85
.21
.21
.21 .21
.18
.50 .19 .17
.)0
.23 .65 .17
.10
.10
6.00 6.75
.22
.22
.19
©John F. Rider, Publisher
www.americanradiohistory.com
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GAMBLE PAGE 7-31
MODEL 36-L
Scheneti o
Socket, Trimers
Voltage
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-32 GAMBLE
MODEL 364. Alignment Poltage,Parts
GAMBLE-SKOGMO, INC.
a
Service Notes For The
Two Band Thirty-Two Volt Six Tube Superheterodyne Receiver
ALIGNMENT PROCEDURE: Realignment of this receiver should never be necessary unless one of the oscillator, antenna or I. F. coils has been replaced. Lack of sensitivity, selectivity, and poor tone quality may be due to any one or a combination of causes, such as weak or defective tubes, battery, or speaker, inadequate or excessively long antenna, open or grounded resistor, bypass condenser, etc. Under no circumstances should realignment be attempted until all other possible sources have been first thoroughly investigated and have been definitely proven not to be the cause. If an I. F. tube is replaced it is advisable to realign the I. F. amplifier, particularly if the replacement tube is one of a different manufacture than the one in the receiver. It is important when aligning to carefully follow the procedure in the order given, otherwise the receiver will lack sensitivity and the dial calibration will be incorrect.
It is imperative that an accurately calibrated oscillator be used with some type of output measuring device.
INTERMEDIATE ALIGNMENT: 1. Connect the high side of the test oscillator output to the control grid of the 6A7 oscillator modulator tube through a .02
mfd. condenser. Leave the grid cap connected to the grid terminal of the tube, and connect the ground side of the test oscillator to the receiver ground.
2. Set the test oscillator frequency to 465 kilocycles (this must be accurate). 3. Align the second intermediate transformer by turning one of the trimmer screws accessible through holes in the top of the transformer shields up and down (increasing and decreasing capacity) until maximum reading is obtained on the output meter, after which adjust the other trimmer screw of the same transformer for maximum sensitivity. 4. Adjust the first intermediate transformer in the same manner as the second I. F. transformer. TO ALIGN THE VARIABLE CONDENSER: It is important when aligning the gang condenser, padding condenser, and wave trap to follow the procedure carefully, otherwise the receiver will be insensitive and the dial calibration will be incorrect. The trimmer and padding condenser will be referred to by their function as indicated on the circuit diagram. 1. Connect the high output side of the test oscillator through a .00025 mfd. condenser to the receiver antenna lead and the low side to the set ground. 2. Some code and aircraft signals are broadcast on a frequency the same or near the intermediate frequency of the receiver. To eliminate interference from these signals a 465 kilocycle antenna filter is incorporated in the receiver. To adjust, tune receiver dial to approximately 1000 kilocycles and set test oscillator frequency to exactly 465 kilocycles. Then adjust the 465 kilocycle wave trap trimmer condenser for minimum 465 kilocycle signal response. 3. Place band selector switch for operation on the 1720-540 kilocycle band, rotate gang condenser so that plates are completely out of mesh, set test oscillator frequency to exactly 1720 kilocycles, and adjust 1720 kilocycle oscillator trimmer for maximum 1720 kilocycle signal output. 4. With band selector switch set for operation on the 1720-540 kilocycle band, set the test oscillator frequency and receiver tuning dial to EXACTLY 1400 KILOCYCLES, then adjust 1400 kilocycle antenna trimmer for maximum 1400 kilocycle signal response.
5. With band selector switch set for operation on the 1720-540 kilocycle band, tune receiver dial and set test oscillator frequency to approximately 600 kilocycles. While rocking gang condenser slightly to right and left adjust 600 kilocycle oscillator padder for maximum sensitivity.
6. Place band selector switch for operation on the 2.35-6.2 megacycle band, rotate gang condenser so plates are completely out of mesh, and set test oscillator frequency to exactly 6.2 megacycles. Bring in 6.2 megacycle signal to maximum output with 6.2 megacycle oscillator trimmer.
7. With band selector switch on 2.35-6.2 megacycle band set receiver dial and test oscillator frequency to exactly 5.8 megacycles. Adjust 5.8 megacycle antenna trimmer for maximum 5.8 megacycle signal response.
Tebe
6A7 1st Detector and Oscillator 6D6 I. F. Amplifier 75 2nd Detector and A.V.0 76 1st Audio 48 Output 48 Output
VOLTAGE TABLE
Filament
Plate
6
32
6
32
6
5'
6
30
6
30
6
30
Screen 32
32 32
Cathode
.5 .6
Grim Ne. 2 32
Grid No. 3 K5 15
5 5
'Triode plate comparative voltage only. Read all voltages from socket to chassis. PRICES ARE SUBJECT TO CHANGE
Pert Number
List Price
Pert Number
WaHOUT NOTICE
List Price
2252 Antenna Filter Coil 2183 540.1720 Kilocycle Band Antenna Coil
$0.65 .80
8000 6879
100,000 50,000
Ohm Ohm
t/Vs
Watt Resistor Watt Resistor
.19 .19
2349 540.1720 Kilocycle Band Oscillator Coil
.65
8907 25,000 Ohm 54 Watt Resistor...
.19
2186 2.35-6.2 Megacycle Band Antenna Coil
.70
9089 500 Ohm 54 Watt Resistor....
.19
2187 2.35-6.2 Megacycle Band Oscillator Coil
.......................... 2347 First I. F. Transformer..
.................. 2259
2053
Second I. Two Gang
F. Transformer Condenser.
..
.53
.....
1.63 1.60
2.65
1942 500,000 Ohm % Watt Resistor Insulated Type 6573 .01 Mfd. 200 Volt Condenser 7860 .01 MEd. 400 Volt Condenser 9386 .1 Mfd. 200 Volt Condenser
.19 .17 .17 .19
2165 Wave Switch
.70
9032 .2 Mfd. 200 Volt Condenser
.23
2111 Tuning Dial Assembly Complete
2.25
1147 .05 MEd. 200 Volt Condenser
.19
2112 Calibrated Dial Scale
.30
9459 .0005 Mfd. Moulded Condenser
.21
2250 Pilot Lamp Bulb 6.3 Volt .25 Ampere
.19
9458 .00025 Mfd. Moulded Condenser
.21
2055 Volume Control With Off and On Switch
1.10
1629 .001 MEd. Moulded Cond
.21
2162 Tone Control
.80
1548 Fuse Block Receptacle
.23
1810 Audio Transformer
1.75
1816 Fuse
.12
1054 Padding Condenser ... 1582 Trimmer Condenser 2346 Wire Wound Resistor Strip 7998 1 Meg Ohm % Watt Resistor
.55 21
75 .19
1817 Six Inch Dynamic Speaker
1818 1740
E1i3g/h1t6"InKcnhobDynamic Speaker
1739 13/16" Knob
7.25 9.00
.22 .22
6984 500,000 Ohm % Watt Resistor
.19
©John F. Rider, Publisher
www.americanradiohistory.com
G:1MI3I,I+;-SKOGNIO, INC'.
GAMßLE PAGE 7-33
MODEL 464.-1 Schematic Socket,Trimmere Coil Data
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www.americanradiohistory.com
PAGE 7-34 GAMBLE
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PAGE 7-36 GAMBLE 110®E, 85
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G AMBLE-ShOGJIO, INC.
GAMBLE PAGE 7-37
MODEL 400-A,41043 Schematic, Socket Alignrent,Parts Chassie,Coil Data
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www.americanradiohistory.com
PAGE 7-38 GAMBLE MODEL 404
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Serial No.5D115200A and up
BROADCAST BAND ALIGNMENT:
1. Set external oscillator to 1720 K.C. and connect it in series with a 200 mmfd. condenser to the antenna and ground posts.
(a) With variable condenser in its minimum capacity position, plates entirely out of mesh, adjust oscillator trimmer (rear section of variable condenser) to resonance.
ä,
(b)
Re -set denser,
external oscillator to pick up signal and
1400 K.C. Rotate variable conadjust antenna trimmer (front
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(c) Re -set external oscillator to 800 K.C., move dial pointer to 800 K.C., and adjust series pad, part number 124-13 (see top view), to resonance. While making this adjustment, slowly rock variable condenser to and fro until maximum output iobtained.
1
.
(d) Check for sensitivity BEND PLATES.
at
800,
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1200
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DO NOT
ALIGNING I.F. TRANSFORMERS: (465 K.C.)
1. With volume control full on and with variable condenser at its minimum capacity position, plates entirely out of mesh, and with external oscillator set at 465 K.C. connected in series with a .1 mid. condenser, to the grid of the IA6 tube (cap at top of tube), adjust I.F. transformers, parts number 108-41 and 108-43, to resonance. Both of these transformers have two (2) adjustment; each, they are accessible from the tops of the cans (for location see top view).
Use as a resonance indicator an output meter connected across the outside terminals of the speaker or by means of an adapter to the plate and screen of the type 33 output tube. Maximum %% deflection of the volt meter indicates resonance. Use only enough signal to get a readily readable output. A low range output meter or the low scale of a multi -range meter should be used.
©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-Si1lJGMll, INC.
GAMBLE PAGE 7-39
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-40 GAMBLE
MODEL 425
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Schematics
GAM13I.E-SIsOGMO, INC.
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®John F. Rider, Publisher
www.americanradiohistory.com
Ga1fBI.N. l'AGN, i -+l
GAMBLE-SKOGMO. INC.
MODEL 516, Symphony Schematic, Socket
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PAGE 7-42 GAMBLE
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GAMBLE-SKOGMO, INC.
GAMBLE PAGE 7-43
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www.americanradiohistory.com
PAGE 7-44 GAMBLE
MODEL 2.521 Voltage, Socket
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GAMBLE PAGE 7-45
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PAGE 7-46 GAMBLE
MODEL, Z-530 Voltage, Socket Al igrunent,Parte
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©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE PAGE 7-47
MODEL 578 ( Two Types)
GAIIBLN.-ShOGMO, INC.
Serial 5G13367QA to
5K17325QA and
/3 04,1
G/MN/CK
Above Serial 5K173250A
t Schematic , Vof age,Part s
MODEL 578-5G133670A-5K173250A
- TUNING RANGE
Standard Broadcast Band
Qcenni
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CONDENSERS
CCCCCC......243651------......111101xxxx0x222322080000500000
Mica V.
V. V. V.
V.
CC..87--..10x0200205
Mica V.
C.0-.0001 Mica
C.10-.01x400 V. C.11 -.006x600 V.
C.12-8.0 mid. x
350 V P-103-6
C.13-8.0 mid. x
300 V P-103-7
C.14-110 mid.
Either external
Mica Cond. or cap.
winding in coil.
RESISTORS
RR..21--5305M0 OOhmhm 14 W. RR..43-5-30500MOhOmhm R.6t/á-1W.meg vol. cont. RR.7.P8---2110510-mM3e5g.O1/h6mW. R.81-45W0.0M Ohm R.91/a-1W2.M Ohm 1 W.
R.10--800M Ohm
R.it-W20. 1M Ohm
NOTE: C.4 -C.8 One
Unit P-118-1
C.5 -C.6 One Unit
P-118-1
VOLTAGES TAKEN
FROM POINTS IN-
DICATED TO C13AS-
SIS GRD. VOL. CONT.
ON FULL.
NUMBERS PRE
FIXED BY
"P" ARE
LPEATTRETR
NUMBERS.
T 'f`b NEATf /3
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60 I. F. FREQUENCY:
//A9C
NOTEi-
465 K.C.
Beginning with 5K173250A, Antenna Coil No. 111-44 replaced
No. 111-33, and capacities C1-.00385 mfd. and C14-.00011 mfd.
were eliminated. Note: On early models C14 was a capacity
winding on the primary of the No. 111-33 Antenna Coil.
See revised diagram
REPAIR PARTS LIST
MODEL 578 - SERIES A
Serial No. 5G133670A and up
PART NO.
DESCRIPTION CONDENSERS
100-11 100-19 100-20 103-6 103-7 118-1 129-5 129-12 129-43
.01 z 400 Volt Tubular Condenser .008 x 600 Volt Tubular Condenser .1 z 200 Volt Tubular Condenser 8 Mid. x 350 Volt Electrolytic Condenser 8 Mid. z 300 Volt Electrolytic Condenser Dual .1 z 200 Volt Tubular .0001 Mica - Type MT - 20% .00025 Mica - Type MT - 20% .00385 Mica - Type MW - 5%
130-3 130-8 130-11 130-12 130-19 13046 1.30-49 130-74
RESISTORS 600M Ohm - 11/4 Watt - 20% - 100 Volt Carbon 201M Ohm 1,4, Watt - 10% - 20 Volt Carbon
/ 260M Ohm - lA Watt - 20% - 50 Volt Carbon
50M Ohm - 1 Watt - 20% - 20 Volt Carbon 1 Meg Ohm - Watt - 20% - 100 Volt Carbon 800M Ohm - % Watt - 10% - 100 Volt Carbon 12M Ohm - 1 Watt - 20% - 100 Volt Carbon 360 Ohm - 1/4 Watt - 20% - 10 Volt Wire Wound
108-47 108-53 110-27 111-33 111-44
COILS Output I.F. Transformer Complete
Input I.F. Transformer Complete Oscillator Coil Complete Antenna Coil Complete Antenna Coil SK173250A-up
104-14 104-17 104-18
TRANSFORMERS
50/80 Cycle Power Transformer Universal Power Transformer 40
Cy.
Primary
25 Cycle Power Transformer
121-8 121-6 121-7 121-7 121-8 121-9 114-15 114-16
SOCKETS Six Prong Socket - Type 42 Six Prong Socket - Type 8D6 Seven Prong Socket - Type 6B7 Seven Prong Socket - Type 8.47 Five Prong Socket - Type Speaker Four Prong Socket - Type 80
SPEAKER Six Inch Dynamic Speaker Five Inch Dynamic Speaker
101-35 102-22 107-5 112-16 112-18 112-19 112-40 112-60 112468 112-113 115-22 118-5 124-14 127-1 131-2 135-14
MISCELLANEOUS Volume Control Less Switch Two Gang Variable Condenser Line Cord & Plug Dial Crystal ,Only Dial Pointer Drive Disc Assembly Complete Pilot Light Bracket Drive Bracket Assembly Complete Bakelite Escutcheon Complete with Glass Dial Scare Tube Shield 8-8 Volt, T-60 Pilot Light Bulb Type J -B -S Series Pad Line Switch Bakelite Knob Dial Pointer Screw
eJohn F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-48 GAMBI.I.
MODEL 578, Serie e A Socket,Trimmsrs Alignment
(;rAMBI.}+.-SKOGM0, INC.
Model 578-Series A
5-TUBE A. C. SUPERHETERODYNE RECEIVER
DESCRIPTION
Tubes
The Tube complement of this chassis is as follows:
1 Type 6A7-pentagrid electron coupled oscillator and first detector.
1 Type 6136 --remote cut-off pentode as IF. amplifier.
1 Type 6B7-duplex diode pentode as diode detector, A.V.C. and AY.
1 Type 42-pentode output tube. 1 Type 80-high vacuum rectifier. Voltages taken from different points of circuit to chassis are measured with volume control full on, all tubes in their sockets and speaker connected, with a volt meter having a resistance of 1000 ohms per volt. These voltages are clearly indicated on the circuit diagram All voltages are measured with 119 volts on the primary of the power transformer. Resistance of coils and transformer windings are indicated in ohms on schematic circuit diagram. Transformers are avail8ble and chassis are sometimes equipped with universal transformers for operation on 40 and 60 cycles and with primary taps for 108, 125, 150, 220 and 250 volts (see illustrations) and also sometimes equipped with 25 cycle transformers with 105-115 volt or 220 volt primaries, not universals.
ALIGNING INSTRUCTIONS
Description of various dummy antennas used and referred to in these instructions:
(1) I.F. Dummy-Consists of a .1 mfd. condenser connected in series with the external oscillator.
(2) Broadcast Dummy-Consists of a 200 maid. condenser and a 20 ohm resistor connected in series with each other and in series with the external oscillator.
Resonance Indicator: Use as a resonance indicator an output meter connected across
the primary of the speaker input transformer, or by means of an adapter between the plate and screen terminals of the type 42 output tube. Maximum deflection of the meter indicates resonance. Use only enough signal to get a readily r'eadable output. A low range output meter or the low scale of a multi -range volt meter should be used.
Alignment
No aligning adjustments should be attempted without first thoroughly checking over all other possible causes of trouble, such as poor installations, open or grounded antenna systems, low line voltages, defective tubes, condensers and resistors. In order to properly align this chassis, an oscillator (generator) is absolutely necessary. No aligning adjustments should be attempted with the chassis in the cabinet. To remove the knobs, pull them off and to take the chassis out of the cabinet, remove the three bolts by which it is fastened and the speaker plug which you will find on the front flange of the chassis panel.
Aligning I. F. Transformers
1. With volume control full on, the extreme right of its rotation, and with variable condenser at its minimum capacity position, plates entirely out of mesh, adjust the I.F. transformers (two adjustments at the top of parts number 108-53 and 108-47)
(a) Connect external oscillator which has been adjusted to 465 kilocycles in series with I.F. dummy antenna, to the control grid cap of the type 6D6 tube and chassis ground. Adjust output I.F. transformer, part number 108-47, to resonance.
(b) Move generator output clip from grid of 606 to grid cap of
6A7 tube and align input IF. transformer, part number
108-53.
(c) With generator connected to grid of type 6A7 tube, readjust output I.F. transformer, part number 108-47, to resonance.
R. F. Alignment-
(530 - 1720 Kilocycles)
1. With gang condenser in its minimum capacity position, plates entirely out of mesh, connect an external oscillator in aeries with broadcast dummy antenna to tan antenna and black ground leads and make the following adjustments: (a) With external oscillator set at 1720 kilocycles, adjust oscillator trimmer, (rear of gang condenser). (b) Re -set external oscillator to 1400 kilocycles, rotate condenser, pick up oscillator signal and adjust antenna trimmer to resonance, (front section of gang condenser). (c) Re -set external oscillator to 600 kilocycles and adjust series pad to resonance, rotate condenser and move dial pointer to 600 kilocycles by gently rocking condenser to and fro. Pick up oscillator signal while adjusting series pad to resonance, maximum deflection on an output meter. This adjustment is accessible from the top of the chassis and is located between variable condenser and power transformer. 25 Cycle Chassis differ only from 60 cycle chassis in that part
number 104-18 transformer is used in place of 50/60 cycle transformer, part number 104-14.
Service Notes
To check for open by-pass condensers, shunt each condenser with another of similar capacity and of the same voltage rating, which is known to be good, until the defective unit is located. Open by-pass condensers frequently cause oscillation and distorted tone. Defective and shorted electrolytic filter condensers cause excessive hum, motor -boating, low volume and a reduction in all D.C. voltages. Open or shorted electrolytic and by-pass condensera (across bias resistor of type 42 tube) will cause low volume and distorted tone.
O1ohn F. Rider, Publisher
www.americanradiohistory.com
(,<AMBLE-SIíOGMO, INC.
Replacement Parts
-A NOTICE
change has beets made in our parts Irum-
bering system. Old parts which are used in new receivers
will have a new number assigned to them. For your con-
venience we are listing below the new part number and
tOheeicrorbree,sApsoens dpinagrt
old part mambar
number, ode,.
should
there
be
one.
There is a large letter on the chassis which identifies the
set as to major part changes. When ordering parts please
ice sure to mention the series number and this large letter.
N.
OSI
Pare
Lit
Ir3A116
P.3A113 P íA211 33,36.1
PSAIP.
P.32R30 P.32a32
P -33X10 P -3A0 P.12A28
MA Type 76 (11a. uube`Socket
010
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160
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Taulorma
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Retainer loins' Chassis Mwnting
Gabions
.10 .12
32AM
Band Change Switch
P.2A45
Sekotivity Control Switch
.45
TRANSFORMERS AND COILS
39A425taºe P.9A405 PA425
ii Antenne
O. raneormer
Lan Assen.
T2 Intera
R. F. Transformer & Cao A.rem
2..m
39A06
PAA392 P-9Á398 P.ºASSIS
P.50X16 P.31X32
T9 T3
TI
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TO
353)(90
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P -5X95
Te
P.53096
P -9A40
5.1
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2.30
1st I. F. Transformer & Gn Assembly
2.12
2nd I. F. Transformer & Cm Assembly
1.03
3rd 1. F. transforma & Can Assembly
226
Audio Input Transformer
2M
Audio Output Transforma (Port of Speaker
Pow-eUr sTyranhsefoSrmeceurr-e1d15SeVpoalrta; te0ly) Cycle ....
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4.70
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Power Teaustmmsc-1X5.230 Frequency
Volt;
40.40Gì I
610
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DIAL AND DRIVE ASSEMBLY
Y.SAD P.26X30
Gang condensseeer Bracket and Bearing Der Shaft
i .16
li
1,10X70 P -24X201 320(310 P.21035 P -26X05 P.26X30 P.24X209 1.37X33 P -28X42 P.8X35 P.30R36
3157122 10.15X0 P -2A26
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Gcer (Rotary)
Gear
Asisi embly.25 Gear Spreaderse Speist
Main Pointer Shaft Assembly
.M
Micrometer Pointer Shaft Assembly
Ann Comeound Gear
Sennlon Pulley Arm
.03
Tension Pulley Sprierº
Drive Belt Dial Clamp to secure Dial Strip
6-32.5/16 mounting screw)
to
(come (witlhb
Dial nsesnv lot neeRece
ily brie. 1,13. and
2.
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Micrometer Pointer
2012 2126
Pilot Pikt
Leto
Lamp
Bulb 16.8V) Sackas & Spring
Ges
6x7
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DIAL AND DRIVE ASSEMBLY-Continwd
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Pan
No.
No.
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3.92
P.0X.4 P.20X9 P-29)42
Pointer Slide. Take-up Sonne Otite
.10
1' Black Drive Cord Only
Dos« .t0
Baer Collets and Set Screws Only for
Securing clove Drive Cord to Shaft
lo
NOTE.: The Aseentbly,
Gana Condenser can be purelared
and Drive Aeumhly. complete -ere Condenser
less Lim.
niai
RESISTORS
T133163
RI
P.AMISI
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PMX406
JI RUSIO
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P.AY5205
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R9
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R12
3B94IO2
R13
P.094255
614
3A95232R16
P.Á94803.
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P.A95104
RIS
16.00 ohm 20 Garbo.
150 ohms 0.2 Carbon
2.0 .,ohms }Dual Volume Control
400 orne 0.2 Carbet
0.000 ohms 1.0 Carbon
.'30.00 ohms 0.2 10,00 ohms h.2
Carbon
Csrbs
2.0 McNhnea 0.2 1.0 Megohm 0.2
Ceibon farinai
3.0 Menuhin. Tune Contint
10.000 ohm. 0.2 Carbon
1300 ohms 0.5 Carbon
25.05 ohm. 3.0 Carbon
35.00 ohm. LO Carbon
2.50 ohms 0.2 Carbon
80.00 ohm. 0.2 Carbon
10.00 choie D2 Carbon
40.45 .15
1.73
.IS .1S .IS .10 .10 .IS .75 .10 .15
.30P.034253R15
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CONDENSERS
F.I)X59 l'.I,A36 P.1;Aw P.17A36 P-IBt40 P-r6X101 I'11A36 P.11Ab
13.17A36 P16Xi11 P.41iX18
r.17A30
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1.46X310
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P.AA35
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2.25
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Cal 235 moil. Oscillator Range C Trimmer .10
GI 1400 mmf.
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Aseembly11Ise.s Dial Assembly
5.40
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PHONO ATTACHMENT PARTS
1173 Phono Switch (Double Pok Double Switcb)
11M Phono Jack
2123 Switc
ob
1421 TerminalhtrrStriP
1 Inches of No. &MC Shield./ Skevinr
(5/16 Dia.)
Throw MO
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Schematic,Parts Resistance Data
PRICFFS A E SUBJECT TO CHANGE WITHOUT NOTICE
D. C. Resistance of Windings
a Refer to Fig. 4.
Following are the D. C. rne5 tame. of the ing. in the chessi.. The slue. given below
.lightly in different note.
Pmt Na.
Windinn
11.05 Anfeema R. }. 'lranmamer
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Windirig
Range D Prrimseer,r Windleº
Range B Seconder,. Winding
Range C Seconder, Winding
Range D Seconder,. Winding
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Short Portion
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R 2 150 oho .2 W
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R 4 100 ohm .2 W.
R 5 30S00 ohm 1.0 W.
R 6 300.018 ohm .2 W.
R 7 1040E obm .2 W.
R 8 20 megobn 1 W.
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RIS 25.00 ohm 1.0 W.
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517 40.00 ohm .2 W.
ano 3 NNO /O NP
T I Ant. R.P. Trans.
T 2 3aterrtaºe R.F Trass.
T 1 1st I.F Toast
T 4 T 5
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T 7 Aadk Input Tran..
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-.50 GAMBLE
YODEL 2-ODL'.-578 Circuit Data Alignrent,Changea Voltage,Coil Data Socket, 2rimanera Phono.Connectiona
(TA MBLE-SK()(T31(). INC.
!`John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE PAGE 7-51
GAMBLE-SKOGMIO, INC. Model 580 3 GANGVA; CON
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Vol tage, Socket
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SELECTOR SHAFT Ä
160-16
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580 II? ODEL
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PILOT LITE AS1S1E6M-6DLY
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©John F. Rider, Publisher
A
PILOT LEAD
SETSCREWS
REMO1T51E-3CONTROL -e-- 5L-LECTOR /UWE
www.americanradiohistory.com
PAGE 7-52 GAMBLE
©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-SIiOGMO, INC.
GAMBLE PAGE 7-53
MODEL 550 Schematic Alignment,Parte
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-54 GAMBLE
MODEL 585 Series A,B,C Socket Layouts,Trimmers Parts, Change Data
GAMßLE-SIiOG1tO, INC
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GAMBLE PAGE 7-55
MODEL 585 Series A,B,C Sehe atics,Voltage
C13
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LEGEND
RESISTORS
NR VALUE
RI -- 800a vow
- SOMa
R - 700.-
R4.- IOOMVL
RS -- I0044 1(W
R
1901». 8,W.
RT- 000.-
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Rf - 1MEC,
-
RIO -- 2500-
R11 - tMEG
-
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R13 - 500014 VSW.
R IA - SOOa
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T. C.9 ARE 14,C 14,C. 17
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NUMDERS PREFIXED DV LETTER'?" ARE PART NUMDERS.
VOLTAGES TAKEN FROM POINTS INDICATED TO CHASSIS GROUND. VOLUME CONT ROL ON FULL
~( 550 -
FIELD /
C14
(COOP)
TC IT
WAVE CHANGE SWITCH P 125-4 3 POSITIONS
tyIllROTATING CL KWISE POSITION SC 1720- 540 NC
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TUNING RANGE -SERIES A:
TUNING RANGE -SERIES B & C:
I. F. FREQUENCY:
Standard Broadcast Band 540 - 1720 Kilocycles Intermediate Band 2.3 - 7.6 Megacycles
Standard Broadcast Band 530 - 1720 Kilocycles Intermediate Band 2.35 - 7.7 Megacycles
Series A Series B
Series C
370 K.C. 465 K.C.
Short Wave Band
Short Wave Band
7.5 - 23.0 Megacycles
TAH
7.6- 19.0 Megacycles
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RiOT TPAOTSINITGIOCNO,KSWCI.S1E7-00.330.0
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QJohn F. Rider, Publisher
POWDER TRANS
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PAGE 7-56 GAMBLE
M VEL 585
Series A,B,C
Alignment
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GAMBLE-SKOGMO, INC.
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CrAMBL1'J-SKOGMO, INC..
GAMBIE PAGE 7-57
MODEL 686-A Schematic,Qolts.ge Socket,Rriraners
MODEL 586-SERIES A
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TUBES:
TUNING RANGE-
Standard Broadcast Band 535-1720 Kilocycles.
Short Wave Band 2280-6600 Kilocycles
The tube complement of this chassis consists of the following tubes.
The type and function of each tube is as follows:
1-Type 6A7 Pentagrid Mixer, Fist Detector -oscillator
647 1-Type 78 Remote Cut -Off Pentode, I. F. Amplifier
oce..r
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Diode
Triode
Second
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A.V.C.
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1-Type 41 Pentode Output Amplifier.
1-Type 80 High Vacuum Rectifier.
Loo
Transformers are available and chassis are sometimes
equipped with universal transformers for operation on 40
and 60 cycles and with primary taps for 108, 125, 150, 220
and 250 volts (see parts list) and also sometimes equipped
with 25 cycle transformers with 105-115 volt or 220 volt
primaries, not universals.
©John F. eider, Publisher
www.americanradiohistory.com
PAGE 7-58 GAMBLE
MODEL 586-A
Alignment
Parte
GAMBLE-SKOG31O, INC.
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PAGE 7-60 GAJIBLE
MODEL 675 Alignment Notes
G.IMBLE-SIiOGMO, INC.
SERVICE NOTES
Voltages taken from different points of the cirouit are measured with a voltmeter having a resistance of 1000 ohms per volt and are made between the pointa indicated and the chassie pan. These voltages are indicated on the circuit diagram.
To check for open by-pass oondensere, shunt each oondenaer with another condenser of the Jame oapaoity and voltage rating, which is known to be good, until the defective unit is located.
Excessive hum, stuttering, low volume and a reduction in all D.C. voltages is usually caused by a
shorted electrolytic oondenaer, open bypass oondensere frequently cause oscillation and distorted tone.
ALI GN MENT :
No aligning adjustments should be made until the set has been thoroughly cheoked for all other possible causes of trouble, such as poor installations, low line voltages, defective tubes, condensers and resistors.
ALIGNING I.F. TRANSFORMERS:
1. ,Pith volume control full on, at the extreme right of its rotation, and with wave selector switch in
the broadcast position, extreme left of its rotation, and with variable condenser at its minimum capacity position, extreme left of its rotation, plates entirely out of mesh, adjust the I.F. transfon..era (parts number 108-15 and 108-16) in the following manners (a) Connect an external oscillator whioh has been adjusted to 370 kilocycles, in series with a .1 mfd.
condenser to the control grid cap of the type 57 first detector tube (see diagram and chassis). (b) Adjust trimming condensers of both I.F. transformers (Parts number 108-15 and 108-16) to resonance.
Use as a resonance indicator an output meter connected across the primary of the speaker input transformer or by means of an adapter between plate and screen terminals of type 2A5 output tube. Maximum deflection of the meter indicates resonance. Care ehould be taken to use only enough signal to give a readily readable output. Notes The two adjustments an each transformer are accessible through holes in the transformer cans from the back of the nhaaala.
BROADCAST BAND ALIGNMENT:
1. Shift frequency of external oscillator to 535 kilocycles and connect in series with a 200 mmfd. condenser to the tan antenna wire and the blank ground wire. (a) Set the variable condenser in its maximum capacity position, extreme right of its rotation. (b) Adjust the broadcast oscillator series trimmer to resonance with oscillator. This trimmer is located between the gang condenser and the power transformer (see top view).
2. Shift frequency of external oscillator to 1712 kilocycles and set variable condenser in its minimum capacity position, extreme left of its rotation, platea entirely out of mesh. (a) Adjust the broadcast oscillator shunt trimmer to resonance. This adjustment is the top adjustment in the oscillator coil can, part number 110-8.
SHORT ¡.AVE BARD ALIGNHENTs
1. Set the wave changing switch in the short wave position, extreme right of its rotation, and change external oscillator frequency to 15 megacycles. (a) Adjust variable condenser with selector knob so that pointer is opposite the 15 megacycle calibration on the dial. (b) Adjust the short wave oscillator shunt trimmer to resonance with the signal (use extreme care and make certain that you do not adjust to resonance with the image instead of the signal). This trimmer is the bottom trimmer (closest to the chassis) on the oscillator coil, part number 110-6, and is accessible from the side of the chassis. (c) Adjust the short wave antenna trimmer to resonance (single trimmer in antenna can, part number
111-11, accessible from the side of the chassis, between type 27 and 57 tubes).
NOTES
Should the planetary vernier dial drive mechanism fail to function properly, it will probably be found to be due to a cracked or broken compression spring. This drive may be dis -assembled by removing th two screws which fasten it to the dial bracket. The part number of the compression spring is 112-31 All of the other dial parts are hardened and should cause no trouble.
©John F. Rider, Publisher
www.americanradiohistory.com
ANT CO.. 7
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GA:btBLl? PAGE 7-61
GAMI3IJF.-SKOG3IO, INC.
..atP' 41,194T 1 F CO..
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LEGEND
RESISTORS
Nt VALUE
111 - L SOM VV.,/
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C U - OOSK600v.
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NUMbERS PIMPLED 51( LETTERS ARE PART
NUMDERA.
VOLTAGES TAKEN FROM POINTS INDICATED
TO CRASSIS GROUND. VOLUME CONTROL OH
FULL
<Rov
CIT' TNf PMSAOE GIMMICK MEANS. AMIRE MOUND
AROUND ANOTHER wile!
RESISTORS IN 0151 UNIT P 10044, -R. L 4,11.Is
CONDENSERS INONEUNIT, P-119-4 C. 16 17.
CONOENSETISCL.0 4. CSC(AC7 ARE IN ONE UNIT P145-5.
RESISTORS I F CAN
AP.N50D11CrOe, N-DCE. 8N.S9E.0RSANIN0
OUTPUT R. 6,7, I1
CONDENSER, CONDENSERS
C I IN ANT COIL. CAN
C.5. -C CO 19.1 ONE UNIT
PN8-4
5.o..cH05014..
(e
ox
MOUNTING DISC
IDE7;_"[15r
6C6
LOUVERS TRIMMERS
T'.
MOUNTING
ID1SC
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RM
R..
TO PILOT
FUSE RDELCTEAPITLACLE
CONTACT SPRING
SFLIEOWREE
CO AMP PUSS
6D6
RF
ANTENNA COIL
119-T
SHIELDED ANTENNA LEAD St -I
SHIELDED
PILO"4T'4LEAD
SUPPLY LEAD RED 5 St .t
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LEAD
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COUPLING 6 SET
SCREW] 147-I 147.1
8U5H1MG SCREW
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SELECTOR SRAFT A ISO -le
MODEL 670A
AUTO RECEIVIR
IMPORTANT BmAiel I462 want be attached; it is absolmd7
te041117 10 VOUIld K-
lector lead. mime dub calms to set
PILOT LITE. ASSET-Ted-se
116.
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STELRIIII P057
MOU NT INC
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-62 GAMBLE
MODEL 670-A Alignment Installation Data
GA\IBL1+,-ShOG\In, INC.
BALANCING SET TO ANTENNA:
When this set has been installed and is ready for operation it may number 149-24 and 150-24. You will find that 99% of the installations
be found necessary (depending on antenna) to balance set to this can be made with the standard eighteen inch cables, and bear in mind
antenna. This is accomplished as follows:
that the shorter the cable, the smoother the drive.
With the receiver tuned to a very weak station, about 130 to 140 (1300 to 1400 kilocycles) on the dial, adjust the antenna trimmer with a screw driver until maximum volume is attained. To reach the antenna trimmer remove the plug button from the top of the case.
I. F. ALIGNMENT:
DIAL ADJUSTMENT:
Mount control head to steering column by means of bracket and strap or under dash by means of bracket or to instrument panel (see illustrations). Attach cables as above. Tune set to some station of à known frequency (between 800 and 1200 K.C.), hold selector knob,
1. With variable condenser at its maximum capacity position and then with screw driver adjust the slotted screw on back of the
with volume control full on, connect in series with a .1 mfd. con- control head, and in that way adjust the dial pointer to the correct
denser, an oscillator set at 175 kilocycles to the grid cap of the 6C6 frequency setting.
tube.
2.
Adjust trimming condensers of both input and output I. F.
CONNECTIONS TO BATTERY:
transformers, parts number 108-20 and 108-21 (see top view of chassis)
The battery cable, number 152-2, (red wire with fuse receptaclo
to resonance with an oscillator, as indicated on an output meter con- at one end and terminal lug at other end) must be connected to
nected across the primary terminals of the speaker input transformer battery terminal of ammeter. At the same time connect ammeter
or between the plate and screen terminals of the type 42 output tube. capacitor, number 148-3, to battery terminal of ammeter, other end
The connection to the tube can be made by means of an adapter. of condenser to any convenient grounded screw on back of instru-
Maximum deflection on the output meter indicates resonance.
ment panel. Make certain that insulating sleeve is slipped over fuse
Note: Each I. F. transformer has two adjustments, both of these when fuse is placed in receptacle, before inserting in receiver (see
adjustments on both transformers are accessible through holes located illustration). All bypass leads should be as short as possible.
in the back of the case between the two mounting plates and directly When connected properly, the discharge due to current drawn by
under the louvres.
the receiver should not indicate on the ammeter. This is important,
R. F. ALIGNMENT:
1. Attach oscillator connected in series with a 200 mmfd. condenser to the antenna lead and with the variable condenser at its
since if improperly connected, as shown by the deflection of ammeter, additional motor interference may be encountered.
PILOT LIGHT:
minimum capacity position (extreme right of its rotation) and with an oscillator set at 1550 kilocycles, adjust condenser trimmer of oscillator section (Front shaft end) to resonance.
2. Re -set oscillator to 1400 kilocycles, rotate variable condenser to pick up signal, adjust antenna (center section) and R. F. (rear
Pilot light assembly, part number 116.6, a shielded cable, plugs into the set and to the rear of the remote control unit (see illustrations) .
TONE CONTROL:
section) trimmers to resonance. 3. Check alignment at 1500-1000.800.600.530 kilocycles by setting
oscillator to these frequencies and picking up signal by rotating condenser.
The tone control assembly, part number 101.12, attaches to the back of the remote control head by means of a special screw and plugs into the set (see illustrations).
4. Bend slotted plates of antenna and R. F. sections only if neces- ANTENNA CONNECTION:
sary. UNDER NO CIRCUMSTANCES LATOR SECTION.
NOTES:
BEND PLATES
OF OSCIL- The antenna is connected to the receiver by means of the antenna cable, number 152-1. The antenna wire is the single black wire projecting from the end of the cable. Splice this wire to the roof antenna
Voltages from chassis to different points are indicated on schematic circuit diagram, and should be measured with a voltmeter hav-
lead and ground the the car as possible.
pigtail
shielding
as close
to the
corner
post
of
ing resistance of 1000 ohms per volt.
OPERATION:
Failure to operate, noisy or weak reception, may be due to defec-
tive tubes or poor contact between cap on top of tube and grid clip.
Tubes may be checked known to be good.
by
replacing
with
another
tube
which
is
If fuse blows out frequently, and erly placed over fuse, the trouble vibrator should be replaced.
insulating sleeve has been propprobably is in the vibrator and
NEVER ATTEMPT TO ADJUST VIBRATOR POINTS.
Case rattles may be due to one or more of the following: Loose &crews in top or bottom coven. Loose elements in tubes. Loose tube shield. Louse R. F. coil shield. Loose grill cloth.
Place key (knob) in lock of left hand control of the remote control unit. After waiting approximately 45 seconds for tubes to
heat up, rotate station selector, right hand knob, until desirable
program is heard. De-tuning will very seriously affect the tone quality
of this receiver. Tone control knob located between two black knobs
(see illu 'one) is BASS and TREBLE switch, it is not variable
tone control Turning it to the right makes the BASS connection,
turning it to the left makes the TREBLE connection. You will note
that the BASS position
materially in reducing interference from
static, street car lines and other high pitched disturbances.
MOTOR NOISE SUPPRESSION:
RECEIVER INSTALLATION:
The ignition system of every automobile generates high frequency
Determine most satisfactory or desirable mounting position. In electrical interference. This high frequency interference arising from
moat cases it will be found that the receiver can be mounted on the the ignition coil, the distributor and the spark plugs must be properly
car bulk head, above and to the right of the steering post.
suppressed in order to obtain satisfactory reception. Each car will
Use the cardboard template which is the same size as set and mark location for two mounting bolts, if mounted on the long aide and one
present more or less an individual problem but there procedure to follow which holds true in every case.
la
a
definito
bolt if on the short side.
This first essential procedure is to disconnect the high tension
Then drill two (2) one-half inch (Me) holes, making certain that the paint around the hole on the engine side of fire wall or bulk head is scraped clean to insure a good ground connection between receiver and the frame of the car. Assemble brackets number 146-2 to case with self-tapping screws.
Insert bolts through dash, assemble plain, lockwashers and nuts on engine side, then hang receiver over bolt heads and tighten nuts securely.
Mount the remote control unit on steering column by means of mounting bracket or attach to instrument panel or under dash (see illustration) .
Two flexible shafts are furnished, one with a slotted fitting on one end, which is the volume control shaft (number 149-18), the other is the selector shaft, with key fitting at one end (number 15fí-18).
leads to the spark plugs and attach the spark plug suppressors (168-1)
(for V 8 Fords 168-4) the special distributor type suppressor (163.2)
which is inserted in the center contact of the distributor as indicated
in the illustration of NO DISTRIBUTOR
typical installation. SUPPRESSOR.) For
(NOTE V cap type
8 FORD USES distributor, ex-
change the standard plug type distributor suppressor (168-2) for
special cable type suppressor (168-3) from your dealer. In some
few eases, inch as Buick» it is sometimes necessary to nee cable type
(168-3) running
suppressors. Tkis type of suppressor is inserted in from the distributor to the spark plugs and which
the leads are con-
cealed underneath the metal plate which covers the spark plugs.
After fastened
the the
spark and distributor suppressors have been properly next in importance is the generator condenser (148-1),
this filters a high pitched whining beard as the motor is accelerated.
noise
which
would
otherwise
be
Make certain that the outer casings of mote control bushings for approximately
flexible shafts five-sixteenths
go of
into rean inch
It is sometimes under the dash, to
necessary in cars use an additional
where the capacitor
ignition coil is located (148.1) obtainable from
and into
tighten set screws to secure remote control head, shafts
cables. If cables are will not turn freely.
pushed too far Always try to
your dealer. It ignition coil and
must be installed between the battery side of the the frame of the car. Next connect capacitor (118.3)
install drive shafts in as straight a line as possible to set. AVOID SHARP BENDS IN CABLES.
from remote control
from the battery side of ammeter to in practically every installation and
frame of car. This is necessary good connection to the frame
IMPORTANT-READ CAREFULLY:
of the car is of utmost importance.
We are prepared to exchange, without charge, our standard number 149-18 and 150-18, eighteen inch cables for twenty-four inch cables,
@John F. Rider, Publisher
www.americanradiohistory.com
G AMßLh,-ShO(: MO, INC.
GAMBLE PAGE 7-63
MODEL 660 Schematic,Voltage Socket, Trimmers Parts List
C -.'.43A
C-51 ,
.4A7 543
F-ic 3 144 o n>Fi. 6 6 0
L.. 175K C.
3.10.04.23.
SCHEMATIC CIRCUIT DIAGRAM
MODEL 660 AUTORADIO See instructions for serial notes etc.
'ß.,.. 1J
SQb,
e oms
Be
Tas
J001,1
r;
r
T 300
ooY.
J
01
LSOM
300M
TOPYIFM 00100AK1e PtuG
CI
Part No. A 660
8104
O 660
C 106 C 117 C 118 C 144
O
1e "
0t 0WM -
TI101
235V
1.25
tee.
DECIMAL ARE- MICROFARAD3. WHOLE HUMBER ARE OHMS. LETTE:r PRZFIXED r1UMBBR3 ARO-
º I;
8 * *U 6Z4
PART ti i'%MLSRS. VOLTAS75 TAKSTI PROM POINTS
INDICìsTEO TO CHASSIS .3RO11HD
14.0 250 > Yi- *
X-- VñO5LrUi.MTOE RC3O/N.5T0ROCOL mOrN. FF5ÇU0L-Lie.S no
s C -5A9
.
II sl>
LL. COIL CAN C- 5.41D R RESISTORS iY' ON& UNIT- 25 279 30,935 A- CONDEHSFeRS IN OEP UNIT C-550 é CHASS-IS GFOU14D G GAOL: r'ASD.=.T OM& COMMON POINT.
BLAC/
`_F, <35 / R1t.'i 46aG'e F]s.1 Fit %-
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CAS*
C 152 C 155 C 522 C 531A C 535
b.'Y
A.GNO
C 5416 C 513 C 543A C 543B C 543C C 543D
v1to7 t11F C 547 C 549 C 550
667
AMOUNnT DA/nC
IF PEAK 175 KC C 551
C 553
C 554
B POWFR MI ' -ET OKn
R 2326
1A1I1rFECDAEB=Err':lon IFAs
TERMINAL B T1Y31frNAE'A.
YOVNT DVC
R 279 R 281 S 338 S 339 S 338S
S 3395
V 660 V 603
663
68144
BwTTFF-iGE
PARTS LIST
List Price
Description
Each
Battery Cable -Plug Type. 1.75
Cable Shaft Brackets
.35
Antenna Cable-Plug Type .80
Shaft Couplings
.35
"A" Choke ---Small
.25
"A" Choke-Large
.35
Dua; .1-200 Volt Con -
d -user
.35
.00025 Mica Condenser
.20
.0005 Mica Condenser
.20
.01-403 Volt Condenser: .25
Dual .05 Condenser
.30
Dual 1-200 Volt Con-
denser
.35
3 Gang Condenser
3.75
R.F. Coil
.80
Antenna Coil
.80
Oscillator Coil
.70
Input I.F. Transformer 1.25
Output I.F. Transformer with Parts
2.50
.1-200 Volt Condenser
.30
690 Ohm Choke
1.40
8-8 Mfd. Electrolytic Condenser
2.25
1 Mfd.-120 Volt Con-
denser
.35
.05.200 Volt Condenser
.25
.5 Mfd. Generator Con-
denser
.50
Snec al :-OOM Ohm Recidnr
Identified with 2 Yellow
Dons
.35
30,995 Ohm Resistor
.60
100 Ohm Resistor
.20
18" Volume Control Shaft. 1.25
18" Selector Control Shaft 1.2.3
Special 24" Volume Con-
trol Shafi
1.50
Special 24" Selector Con-
trol Shaft
1.50
Complete "B" Unit -OAK 8.00
Volume Control
1.50
Remote Control Head Com-
plete Less Shafts
5.00
20 Ampere Fuses
.10
Mounting Bolts
.10
All carbon resistors
.20
All sockets
.20
Dynamic speakers
5.00
rt I B REMOTE C0111-º011.. <aslei
FAG I
3,040301
PRICES ARE SUBJECT
TO CHANGE
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-64 GAMBI.E MODS, 680 Scheme.tic,Voltege
AMrEnMA
ANTENNA COL
GAMBLE-SKOG\IO, INC.
MODEL 680
J GANGVYAR CñMOEnSER
/N>.RMcur/^/CoOs L.0
Socket,Trimmere Alignment, Mounting
C,urf'^%oTsRiuNJ
Cs
C
IF PEAK 175 KC.
R
2IOK
A MO,
SPA Alf 4.0
LOMA,
CONDENSERS
No.
Value
No.
Value
R SS ISTORS
No.
Valu2
crj
C.1:-20 MMF MICA C.2 :-20 MMF MICA C.3:-.01x400V.
C.16:-.25x400V. C.16 : -.02 bx400 V. C.17:-.015x400V.
R.1: -500 R.2: -100M R.3: -50M
I/3 %V -
I,(,W. I,fIW.
frmrL/ré sr poirée rRAns
//LRATOR
C.4:-.1x200V.
C.18:-600 MMF MICA R.4 :-3500
144w.
C.5:-.05x200V. 0.6:-100 MMF MICA
C.19:-600 MMF MICA R.5: -20M C.20:-500 MMF MICA R.8 :-1600
I/W. 1W.
RK
C.7 :-.1x200 V.
C.21:-2000 MMF
R.7 :-25M
W.
C.8:-.1x200V.
MICA 8.8:-500M
1/dvg.
C.9:-.1x200V. C.10:-100 MMF MICA C.11:-100 MMF MICA C.12 : -.1 x200 V . C.13:-100 MMF MICA C.14 :-.01x400 V.
C.22 :-.5 M F D.x120 V . C.23:-8 MFD.x300V. C.24:-.01x400V. C.25:-.01x1400V. C.28:-8 MFD.x300V. C.27:-.5 MFD.x120V.
f1OTE'
R.9:-1 Meg. Vol.
Control P-101-21
R.10: -100M
I,fjW.
R.11:-1 MEG. %W.
R.12: -250M
I,kW.
R.13: -301M
I,gW.
R.14: -301M
%W.
R:15:-100
RÇ CtJ
Cr A'CMONE
rr ÇCf/ ERY,,,/r ósR MOA-E SEATER t CNJT_
O
1 w'ºó érE`^n
t AcS
C.4 and C.9 are in one unit P-118-1
R.18:-100
C.7 and C.8 are in one unit P-118-1 C.26 and C.23 are in one unit P-119-17
BROADCAST ALIGNMENT:
R.16 and Numbers
R.16 are prefixed
in by
one unit P-106-6 letter "P" are part
Serial No. 00001 ai r11. With variable condenser in its minimum capacity position,
up.
connect test oscillator set at 1550 K.C. and in series with
numbers.
Voltages chas.eis
taken from ground. Vol.
points indicated control on full,
to no
signal.
DUMMY ANTENNAS:
The dummy antennas referred to in the following instructions are:
"I.F. Dummy"
-A .1 mfd. condenser connected in series
with the test oscillator output lead.
broadcast dummy, to the antenna lead of receiver. 2. Adjust oscillator trimmer of variable condenser to resonance
(this adjustment is on the end section of the three gang con-
denser -see top view).
3. Shift test oscillator to 1400 K.C. and pick up,sjgnal by rotating condenser and adjust R.F. (center) and antenna (front` trimmers to resonance, see top view.
"Broadcast Dummy"-A 200 mmfd. condenser connected in series
with the output lead of the test oscillator.
RRC
RESONANCE INDICATOR: Use as a resonance indicator an output meter connected across the primary of the speaker input transformer, or by means of an adapter between the plate and the screen of the type 42 output tube. Maximum deflection of the meter indicates resonance. Use only enough signal to get a readily readable output. A low range output meter or the low sçale of a multi -range meter should be used.
O
ETR/AIMER3
C/YT13rPNUCr.
I. F. NJ?
-J4
1.F. ALIGNMENT: 1. With variable condenser in its minimum capacity position
(plates entirely out of mesh) and with volume control full on, connect test oscillator set at 175 K.C., in series with I.F. dummy antenna, to the grid cap of the type 6A7 tube. 2. Adjust trimmer condensers of both input (108-33) and output (108-34) I.F. transformers to resonance with oscillator. See top view for location of these transformers. There are two adjustments on each and they are accessible from the top of the transformer shield and should be adjusted with an insulated screw driver.
POWER T/oRsAN-sSFORMER
YAR [ONOéNJER -M r.=.1.TCr
STEERING POST MOUNTING
DASH . HTG DRAG«
SIDE vI
i DR.H. HOLES
WfN iJl, DOITS
HTG DRAÿKDET
I,.,.....o e-. R., -
.c6so8c 7 42 Old/W[6
REMOTE NEA» COS9Sfe.TE
Nora -MEG. STRAP
MAS A HOLES.EAGM RAV ING ADIILEMSION CORRESPOMDIMo TO DIAMETER OF SSEERING POST.
DASH
rR<N
.4MTG 00,3
rOIMTER ADLUDfry.ENr
S Evi
! oF Ew?sÓRHT
LfTELI NG RFnOTE HEAD
REAR vIEII
ANTE//Y//H-A.E?CO/[
REMOTE COST
fIN/áó AZILE
/26
REYMOOTLE'ECOCNA, S.-
A AAT/TsErR,Y<CAGiGI
3N/Z41220
ANTENNA LEA."
©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-SKOGMO, INC.
COTO
,V CO,
cATM)QL PAr TUNNG /nOK.ero4
o,alrwE L CPLN
GAMBLE PAGE 7-65
MODEL 686,A & B Schemati c, Vol ta ge Socket,Trißmere Parte Liet
rel. C.wr.W 101.4
2 len. Cewlrel
10141
PoIYfL.^ 7rA,j/o.f,rE.e
50-6C CYCLP
25 cYcLL P-/04 -53
U.v/vE,Y-3/4OL¢-255¢ L Yc L E
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4o -55
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13,1,44,7
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4
1/S17
14.a s.urt
MODEL 686 SERIES A, B
I. F. FREQUENCY
465 K. C.
C3OHÇo/1NP4-/CA2R-2/.C9e1
K7
FIG. 2-BOTTOM VIEW (Showing Trimmers)
401
LfG
L`/4
!belve. c..r.4YJw/TCN P-/15-/7 PD!/TNN! 41,74TMN cIOLKN'As!
P1!!/T/ON! /A9fAo
cAn.!ILr
-.S-D?-/7l0
ICC.
Cf
p^'oM/DOLL YAWL- Kf05=d6g7 Are .
lAt1rT mot be" - J..C/7rC-ASJ N.C.
.e,/2
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f/CLO
6G5
P6,L'eOTOLt,T7E53
Ac drrcNav
NiLUMf cPVTtiL
No.
Part No. Description RESISTORS
R1 R2
130-20 130-105
1--101550000MOVOVhoohmllmtt---CÁ-C%aarrbbWWooaanntttt--2200%%
R3 R4 R5
116
R7
130-12 130-104 130-104 130-27 130-19
5-90M1M0OOVhmhoml-t1--C',aWrbWaottan-t2t-020%%-
- 9115312M000000VM%OVOVeo-hg1lhootm0m-llOC0tt----%hCCa1VmraaborrWWo-bbl1ntooaa-4nCntttt--a22Wrb00oa%%tnt --
RS R9 RIO
- 101-46 1 Meg Ohm-Volume Con-
130-4 130-103
321t0r0o0%MMl e-gO10hO0mh-Vm%o-l%Wt-CaatWtr-b2ao0tnt%
-IS0 Volt-Carbon
1111
130-102
5-0500M
Ohm-% Watt Volt-Carbon
-10%
1112
1220 Ohm
R13 106-26 j 32 Ohm
- R14
52 Ohm
R15
1116
101-53 130-110
51100MM%e-gO10hO0mhm-VT-oo1ln/t1-eC0CarWobnoatrtnot l
CONDENSERS
Cl
C2 C3
100-22 100-20 129-39
.05
.1
.00005
x 200 x 200
Mica
VV(MooTlltt---22055)%%-20%
C4 C5
CO
)- 124-28
129-56 129-55
Series Pad .00055 Mica .0034 Mica
(((MM80TW-2-20-5W))-10%
C'7
129-54
% .003
Mica
(MW-W)-
C8 C9
100-20 100-22
2% %
.1 .05
x x
200 200
VVoolltt--2255%%
C10 129-12 .00025 Mica (111T-0)-20%
C11 C12
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-66 GAMBLE
MODEL 686, A it B Alignment,Parte
GAMBLE-SKOGMO, INC.
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GAMBLE-SlíOG.MO. INC'.
GAJIBLE PAGE 7-67
MODEL 750 Schematic Voltage
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PAGE 7-68 GAMBLE
MODEi. 750
Alignment
Socket
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SERVICE MANUAL SEVEN TUBE SUPERHETERODYNE WITH A.V.C. AND SHORT WAVE
105-115 Volts Alternating Current, 50-60 Cycles, 80 Watts. 530-1720 Kilocycles - 1700-4500 Kilocycles. SERVICE NOTES
Should it be at any time necessary to rebalanoe this set, the correct prooeedure is as follows:
1. Volume and tone controls on full during all alignment. 2. Squelch switch in "no, squelch" position (counter-olookwiee (left) rotation) during all alignment. 3. Adjust variable squelch control on rear flange of chassis to maximum counter-clockwise (left)
position. 4. Set variable condenser in minimum oapaoity position (plates open) at the start of all aligning.
I.F. ALIGNiENT
The intermediate frequency of model 750 is 175 kilocycles, and ie aligned as follows:
1. Connect oscillator (set at 175 kilocycles) to I.F. grid (second 58 tube) and adjust both trimmers of second I.F. transformer (underneath chassis) to resonance (maximum deflection on.an output meter connected across the primary of the speaket input transformer).
2. Connect oscillator output to converter grid (2A7 tube) and adjust both trimmers of first I.F. transformer to resonance. Under no conditions touch the trimmers of the second Z.F. transformer after adjusting them (see No. 1).
The four trimmers of the two I.F. transformers are all adjusted from the bottom of the chassis (one nut and one screw adjustment on each I.F. transformer trimmer).
BROADCAST BAND ALIGNMENT
Wave changing switch in clockwise (right) position.
1. Connect an oscillator in series with a 200 mmfd. condenser to the Tan (antenna) lead and Black (ground) lead. With the oscillator set at 1720 kilocycles and the variable condenser at its minimum position (extreme right of its rotation), adjust trimmer of oscillator (rear) section to resonance.
2. Change oscillator to 1400 kilocycles, rotate variable to this frequency and adjust R.F. and antenna trimmers (center and front trimmers respectively) to resonance. Do not touch the oscillator trimmer.
3. Check tracking at the following points only: 1200-1000-800-600-534 kilocycles. NOTE: This receiver will be slightly out of track at 534 kilocycles - do not bend plates in an attempt to track it at this frequency. Rotor plates Of condensers should not be bent, except if absolutely necessary, and then only on the center and front sections.
SHORT WAVE BAND ALIGNMENT
Wave changing switch in counter -clockwise (left) position.
1. The frequency range of this short wave band is approximately 1700 to 4500 kilocycles. 2. Peak short' wave antenna coil to resonance with oscillator set at 1720 kilocycles by slipping
primary.
3. Check for sensitivity at the following frequencies only: 1720 and 3700 kilocycles - under no
conditions touch trimmers or plates of variable condenser while checking short wave band. NOTES:
For failure to operate over both bands, check 2A7 tube and connections to and contacts of wave changing switch.
Condenser shaft to which pointer is attached is rotated by means of a celluloid dial attached to the condenser shaft and a bronze friction drive assembly, to which is attached the selector knob. Should this drive ever slip or become rough, it can be adjusted for smooth operation by sliding the bronze washer drive assembly either closer to the variable shaft or farther away from it in the slot in which it is mounted, to insure smooth operation.
©John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE-SIïOG3IO, INC.
GAMBLE PAGE 7-69
MODEL 770 Schematic Voltage Socket,Trianere
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465 K. C.
535-1725 Kilocycles. Intermediate Band
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Short Wave Band 5.5-18.1 Megacycles.
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l'AGN. 7-70 GADiBLE
MODEL 770 Alignment
Parts List
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AN.eNNA, CO.
GAMBLI'.-ShOG3IO. INC.
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GAMBLE PAGE 7-71 MODELS 777C, 777L
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RANGE -SERIES
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52o-1700 Kilocycles.
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1.7-5.5 Megacycles.
Short Wave Band 5.5.18.0 Megacycles.
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-72 GAMBLE
YODELS 777C,777L
Socket,Triumers
Parts List
(rr1NIBLE-ShOGJIO, INC.
TOP VIEW - SERIES A
TOP VIEW - SERIES B
6D6
Parts Used Parts Used io Ser. A In 8er. R
DESCRIPTION
List Price Each
Only
Only
Unless Unless
OOtthheCerrOwwNiissDeeELLNiiSssttEeeRddS---AAllll
Molded Mica Single Section
30.25 Tubular
Unless
Otherwise
Listed-APlalperDuBayl
-Pass Section
Tubular
.25
Paper By -Pass
.50
-- 103-3
103-4 Not Used. 129-20
Not Used. 18 MM. z 300 V. Electrolytic
103-4 18 MM. z 360 V. Electrolytic
103-8 Not Used.
1.0404M7fdM. izca4-0T0ypVe.
Electrolytic MH -}- or
Not Used. 129-29 .0038 Mica---Type MW -1- or
5% 2,4%
1.35 1.35 1.35 .50 .60
Not Used. 130-81
-2 - U15nMlessOhOmtheRrwEWiSsIeaStTtLO+isRteSodr-All20R%es-i1st8o0rs V.
.20 .40
108-35 108-38 109-14
108-36 108-38 Not Used.
Output I.F.
COILS Coll Assembly
Complete -Lees
Can
Input I.F. Broadcast
Coil R.F.
ACsoslel mAblsysemCobmlyplCetoem--pLleetess-LCeasns
Can
1.50 1.50 1.00
109-15 Not Ueed.
Not Used. 109-17
Mid -Wave & Short Wave S.F. Complete-Lelia Can
Broadcast R.F. Coil Assembly
Coil Assembly
Complete -Less Can
1.50 .70
- Not Used. 109-18 Mid -WaCveom&pleSteh-oLrteWesaveCaEn F. Coil Assembly
110-18 Not Ueed. Broadcast Oscillator Coil Assembly Complete
1.50
Lese Can
.50
110-19 Not Used. Mid -WaCveom&pleSteh-oLrteWssaveCaOnscillator Coil Assembly 1.25
'Not Ueed. 110-24 Broadcast Oscillator Coil Assembly Com.-Less Can .75
Not Used. 110-25 Mid -WaCveom&pleStheo-rLt eWssaveCaOnscill-ator Coil Assembly 1.50
111-23 Not Used. Broadcast Antenna Coil Assembly Com.-Less Can. 1.00
111-24 Not Used.
Not Ueed. 111-29
Mid -WaCveom&pleSthe-oLrteeWsavCeanAntenna Coll Assembly 1.50 Broadcast Antenna Coil Assembly Com.-Lees Can 1.00
Not Used. 111.30 Mid WaCveom&pleSteh-oLrtesWs avCeanAntenna Coil Assembly 1.50
TRANSFORMERS
104-23 Not Used. 50/80 Cycle Power Transformer
3.50
-25 104-24
104-25
-40 104-28
Not Used. Not Used.
-25 Not Used.
Not Used. Not Used. Not Used. 104-27 104-28 104-29
26 Cycle Power Transformer
Universal
Cycle Primary
Universal
Cycle Primary
50/00 Cycle Power Transformer
26 Cycle Power Transformer
Universal
Cycle Primary
-40 Not Ueed. 104-30 Universal
Cycle Primary
5.00 7.50 8 00 4.50 7.00 7.50 7.00
114-13 114-17 114-18
114-13 114-17 114-18
8 EARJSRS Six Inch Speaker Eight Inch Speaker Ten Inch Speaker
8.00 8.50 8.00
101-23 101-24 102-18 107-5
101-23 101-24 102-18 107-5
MISCELLANEOUS Volume Control and Switch Tone Control Three Gang Variable Condenser Line Cord and Plug
ASSEORT,TEO3M.5 VAIMEOWe.'
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@John F. Rider, Publisher
www.americanradiohistory.com
GAMBLE PAGE 7-73
MODELS 777C,777L
GAJI BI,F.-ShOGJIO, INC.
Series A & B
NOTE: IN TYPE 6B7,
SERIES B DUPLEX
THE TYPE 75 WAS DIODE PENTODE
REPLACED BY AS A SECOND
DETECTOR, A.V.C. AND AUDIO.
Series A and B chassis are aerially numbered on the back flange of the chases, series A beginning with number "5B104021A" and up, series B chassis beginning with number "5D114175B" and up. Series A and B may he identified by the 'letter "A" and "B" at the end of the serial numbers.
Transformers are available and chasis are sometimes equipped with universel transformers for operation oa 40 and 60 cycles and with primary taps for 108, 125, 150, 720 and 250 volts (see instructions) and also sometimes equipped with 25 cycle transformers with 106-115 volt or 220 volt primaries, not universals.
Alignment
INTERMEDIATE BAND ALIGNMENT I. With ware changing switch in the mi. nu,.li, 1: position
center of its rotation, and with external o-.'dL,tur set at 5 megacycles and connected in series with "Duuuuy 3" to the tan antenna and black ground lead, make the following adjustment.: (a) Move dial pointer to 5 megacycles and adjust intermedi-
ate wave oscillator (adjustment number 9), intermediate wave R.F. (adjustment number 5) and intermediate antenna (adjustment number 4) to resonance.
(b) Re -set external oscillator to 1800 K.C. and pick up signal by rotating variable condenser and check for sensitivity.
(c) Re -check broadcast sensitivity as outlined under "Broadcast Band Alignment".
Series "A" chassis have no intermediate band series oscillator pad adjustment.
SERVICE NOTES Voltages taken from different points of circuit to chassis are measured with volume control full on, all tubes in their sockets and speaker connected, with a volt meter having a resistance of 1000 ohms per volt. These voltages are dearly indicated on the circuit diagrams of series A and B. SIABNUEVRCOESRAMHDNOEEDNRRTTASTF,OCFIAERPCERCTREUIIVNAITEGLENDATANCSWDCIGUHNGRILAARELOCYUFMNRODAOFKMIVLNEOAGALCDTTASMINGESGEAHSOUMUUPEROLAEDN-MENTS. All voltages are to be measured with 119 volts on the primary of the power transformer.
ALIGNING INSTRUCTIONS Dummy Antennas
The following dummy antennas are used in aligning both series A and B and are referred to in the following alignment instructions se "Dummy 1", "Dummy 2", and "Dummy 3".
Dummy 1: (LF.)----Consists of a .1 mfd. condenser connected in series with the external oscillator.
Dummy 2: (Broadcast)- Consieta of a 2011 mmfd. condenser and a 20 ohm resistor connected in series with each other and in series with the external oscillator.
Dummy 3: (Intermediate and Short Wave) ---Consists of a .1 mfd. condenser and a 400 ohm resistor connected in series with each other and in series with the external oscillator.
Resonance Indicator: Uee as a resonance indicator an output meter connected across the primary of the speaker input transformer, or by means of an adapter between the plate and screen terminals of the type 42 output tube. Maximum deflection of the meter indicates resonance. Use only enough signal to get a readily readable output. A low range output meter or the low scale of a multi -range meter should be used.
ALIGNMENT PROCEDURE SERIES A ONLY The following adjustments to be made after the IF.'s have been aligned as explained above. BROADCAST BAND ALIGNMENT: 1. With wave changing switch in the broadcast position, extreme
left of its rotation, and with externs, oscillator net at 550 kilocycles and connected in series with 'Dummy 2" to the tan antenna and black ground lead, make the following adjustments: (a) Adjust broadcast aeries pad to resonance with oscillator.
Keep set in tune with oscillator be slowly rocking to and fro the variable condenser until maximum output is obtained. Note: This adjustment as accesible from the top of the chassis and is located between the variable condenser and the electrolytic condenser. See top view. (b) Re -set external oscillator to 1500 K.C., move dial pointer to 1500 K.C. and adjust oscillator (adjustment number 3), R.F. (adjustment number 2) and antenna (adjustment number 1) to resonance. See bottom view for location of these adjustments. (c) Repeat adjustments "a" and "b" until sensitivity is at its maximum.
ALIGNMENT PROCEDURE SERIES B ONLY The following adjustments to be made after the I.F.'s have been aligned as explained above.
BROADCAST BAND ALIGNMENT: 1. lcaWeynfcttieltehnosfnwaataonvadenrodccthoaantbinnloagencic,nktegadngsdrwoinuiwtncicdhthriieelnesxattdehrw,eniamtbhlaroko"aeDsdccuitalhmlseatmtopfryooslsle2iott"wioaintnto,g6e0thxa0edtrjkeuitmaslomta--
ments: (a) AKftoarfoeidnejteuhpthdseet.scebhtvNraiaonsoraeitdasetbcu:alnaesnTetdhcwoisisesnitrdhialeoedsncojasuseptsceratiddmlluaebttnnooetrttiwl ribseemyesaonacsnxlcaiotmehnwseculieybmvlewarrooiicftauhrkbotilpmneougstcctthoioileenladateotnoonbdrp-.-
ser and the electrolytic condenser. See top ciew. (b) t3nRo)ue,m-s1Rbe4.et0F0r.ex(1Ka1ted..C1rjn0u.aslrtaemnsodoesncnaitalnldacnjteuuo.smrt btSoeoeers1c24bi)l0ol0atattonoKrdm.C(a.v,anidtemejwunosnvtfaemore(danliodatcjluanpstiutoomminnebtneoetfrr
these adjustments. (c) Repeat adjustments "a" and "b" until sensitivity is at its
maximum. NAMTHLOELETNETOI:AMFLAITGOTHESEICSSFILERELEXAQATTUDROEEJRNUMCSSEITYGLMNYWEANHLNTIECBSCEHETTSWHUSAANILTREIY.DTFIIHANNELLAMFNBAUDEKNLNIDONOAWGTTHE FUNDAMENTAL.
SHORT WAVE BAND ALIGNMENT:
L Wt1trh7eeimtmheteagwnraiagcavyhnecttleecosnfhnaiaantnsgdianrnogdctoasntbwinloaeinctcc,ktheadngidrnoinuw,nhidtseherliseeehaxsodter,wtrnimtawhlaak-v"oeeDsctuihplmeloasmtifotoyirollnso3,ew"t ienxatog-t
adjustments:
(a) ojMusscotimvlleaetnodtrialn(uapdmojibunestertmr 7et)onta1n7dnumsmhebgoeartrcywc8l)ae,vsesahanondrtteandwnjaauvset(asRdhjo.uFrs.ttmw(eaandve-t
number 6) to resonance.
(h)
Reset
signal
external oscillator by rotating variable
to 6 megacycles condenser and
and check
pick up for sen-
sitivity.
INTERMEDIATE BAND ALIGNMENT:
1. With wave changing switch in the intermediate wave position. center of its rotation. and with external oscillator set at 1800 K.C. and connected in series with "Dummy 3" to the tan antenna and black ground lead, make the following adjust-
ents
(a) Rotate variable condenser to approximately 1800 K.C.,
tune in oscillator signal and adjust M.W. series pad (see top view) to resonance. Slowly rock condenser to and fro while making this adjustment to be sure maximum output
is obtained.
(b) Set external oscillator at 5 M.C., rotate condenser, pick up signal and adjust intermediate wave R.F. (adjustment number 5), intermediate wave antenna (adjustment number 4) and intermediate wave oscillator (adjustment num-
ber 9) to resonance.
(c)
Re-check broadcast alignment and if it ie found necessary
to
17
re-adjust either M.C. abort wave
RF. or antenna trimmers, repeat the and 5 M.C. intermediate wave adjust-
ments.
ALIGNING I.F. TRANSFORMERS (465 ILC.)
Series A and B.
Series A-Part No. 108-35 Output IF. Transformer Series A-Part No. 108-36 Input IF. Transformer Series B-Part No. 108-35 Output I.F. Transformer Series B-Part No. 108-36 Input I.F. Transformer
TNAMHLOEELNT, ETOI:AMFLAIGTOTHESCEISFISLREELEAXQTTAUORDEREJNUMCSSIEYTGLMNYWAEINH.NTIBECSECHETTSWHUSAANILTRELYDTFIIHANNELLAMNFBUADENKLNDIONOAWGTTHE FUNDAMENTAL.
SHORT WAVE BAND ALIGNMENT: 1. Wtt1ra7enimtmhaeengtwraeicangyvnhceatleoascfnhdaainntadbgilnarcocgoktnantsgiweorcointtuec, dnhadniindlneaawtdehr,ietihemsaaewkbxeoitterhtrthne"awDlafuvoomelslocmpiwlyolianstig3ot"iroantdsot,jeutteshaxte-t-
ments : (a) Move dial pointer to 17 megacycles and adjust short wave
oscillator (adjustment number 6), short wave R.F. (adjustment number 7) and short wave antenna (adjustment number 6) to resonance. (b) Re- et external oscillator to 6 megacycle. and pick up signal by rotating variable condenser and check for eensitivity.
These I.F. transformera have two adjustments, both of which are accessible from the underside of chassis (see bottom view).
1. With volume control full on, the extreme right of its rotation, and with wave changing switch in the broadest position, extreme left of its rotation, and with variable condenser set to approximately 1400 kilocycles, make the following adjust meats:
(a) Connect external oscillator set at 468 kilocycles, in eerie, with "Dummy 1", to the control grid cap of the type 6136 tube, located between the two I.F. transformers, and ad-
just the output IF. transformer to resonance.
(b) With "Dummy 1" still connected, move oscillator output clip from grid of 6136 to grid cap to 606 and adjust input
IF. transformer to resonance.
(c) With oscillator still connected to 6C6, re -adjust output LF. trans former.
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-74 GAMBLE
MODEL 780 Schematic Alignment Parte List
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CJ
GAMBLE-ShOG3IO, INC.
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ANTCNNA TAN
GAMBLE-SIíOG31O, INC.
GAMBLE PAGE 7-75
M(P)H. 778-A.
Schematic ,Voltage Socket,Trimmere
Parts List
MODEL 778-SERIES A
/13+'
Tj //g.
366+
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YYIL//IlE
CONrOL
I. F. FREQUENCY
465 K. C.
G/6
Band Switch 3 Positions,
125-18
Rotating
Clockwise.
Car
Positions Are: 1st Broadcast: -535-1720 K.C. 2nd Middle Wave: -1690-5300 K.C.
I
024
NS3erOdt TnSoEht-oVtrutonlWetadagvteoes:s-tt5ar.ok2ne-1ng8s.fi1gronmMal..Cp. oints indicated to chassis ground.
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RESISTORS
No. Part No.
Description
Rl 130-20 100M ohms-I/3 Watt -20%-
R2 R3 R4 R5 R8
130-43 130-77 130-12 130-60 130-88
521221511010000005000M0M0MVVV0VVoooooooooohlllhhhttthllm---mmmttmCCC--sCCssss-aaa----1aarrr1112bbbrr/bb//3ooo33oonnnnnWWWWWaaaaatttttttttt-----2222200000%%%%%-----
R7 R8 R9 RIO R11 R12 R13 R14 R15
130-3 130-20 130-11 130-22 101-47 130-20 101-38 130-3 130-38
W155w5w15125111521000000050000ii000mm0000i00t0trhhVVVMMMMMM0eeeVVVggooooAFooooooooWlllohihtththhhoo.llldC---hmtttmmmmhmohCCC---em.mCCCusmlsssssaaain------staaa-Srrr-y1d1111-1bbb1rrr(w(bbbV/////ooo/T/3i33333oooS3nnntoocnnnwlhnWWWWWWWui)etmcaaaaaaahttttteCttttttt)tt------oC-222222n2ot000000r0no%%%%%%%tlro-------l
100 Volt-Carbon
R16 R17 R18
106-27 106-27 106-27
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PARTS
Tl 111-54 M.W. and S.W. Antenna
T2 T3
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Coil Coil
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5 125-18 Band Switch
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FIG. 3-TOP VIEW-MODEL 778-SERIES A
©John F. Rider, Publisher
FIG. I-BOTTOM VIEW SHOWING TRIMMERS
www.americanradiohistory.com
PAGE 7-76 GAMBLE
GAMBLE-SKOGMO, INC.
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©John F. Rider, Publisher
7 -Tube A. C. All Wave
3 -Bend High Fidelity Superheterodyne Receiver
www.americanradiohistory.com
EDII, 1050 Schematic
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PAGE 7-78 GAMBLE
LU1L 1050 Socket
Alignment Notes
GAMBLE-SEOGM O, INC.
1933 PILOT LITE e.5 VOLTS
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FRONT
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SQUELCH AND
SHORT WAVE
105-115 Volte Alternating Current, 50-60 Cycles, 105 Watte. 530-1720 Kilocycles - 1700-4500 Kilocycles.
SERVICE NOTES
Should it be at any time necessary to rebalance this set, the correct prooeedure is as follow,:
1. Volume and tone controls on full during all alignment. 2. Squelch switch in no squelch" position (counter -clockwise (left) rotation) during all alignment. 3. Adjust variable squelch control on rear flange of chassis to maximum counter -clockwise (left) position. 4. Set variable condenser in minimum capacity position (plates open) at the start cf all aligning.
I.F. ALIGNMENT
The intermediate frequency of model 1050 is 175 kilocycles, and is aligned as follows:
1. Connect oscillator (set at 175 kilocycles) to I.F. grid (second 58 tube) and adjust both trimmers of second I.F. transformer (underneath chassis) to resonance (maximum deflection on an output meter connected across the primary of the speaker input transformer).
2.
Connect oscillator output to converter grid (2A7 tube) resonance. Under no conditions touch the trimmers of
and adjust both trimmers of first I.F. transformer to the second I.F. transformer after adjusting them (see No.
1).
The four trimmers of the two I.F. transformers adjustment on each I.F. transformer trimmer).
are
all
adjusted
from
the
bottom
of
the
chassis
(one
nut
and one
screw
BROADCAST BAND ALICNMENT
wave changing switch in clockwise (right) position.
1. Connect an oscillator in series with a 200 msnfd. condenser to the Tan (antenna) lead and Black (ground) lead. With the oscillator set at 1720 kilocycles and the variable condenser at its minimum position (extreme right of its rotation), adjust trimmer of oscillator (rear) section to resonance.
2. Change oscillator to 1400 kilocycles, rotate variable to this frequency and adjust R.F. and antenna trimmers (center and front trimmers respectively) to resonance. Do not touch the oscillator trimmer.
3. Check tracking at the following points only: 1200-1000-800-600-534 kilocycles. NOTE: This receiver will be slightl out of track at 534 kilocycles - do not bend plates in an attempt to track it at this frequency. Rotor plates of condensers should not be bent, except if absolutely necessary, and then only on the center and front sections.
SHORT WAVE BAND ALIGNMENT Wave changing switch in counter -clockwise (left) position.
1. The frequency range of this short wave band is approximately 1700 to 4500 kilocycles.
2. Peak short wave antenna coil to resonance with oscillator set at 1720 kilocycles by slipping primary.
3. Check for sensitivity at the following frequencies only: 1720 and 3700 kilocycles - under no conditions touch
trimmers or plates of variable condenser while checking short wave band.
Tun -a -lite.
VISUAL TUNING CHECK
The visual tuning indicator (tun-a-liteatube) is mounted horizontally assembly and its operation in this respect can be checked as follows:
on the
front
of
the variable
condenser
1. 2.
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SQUELCH CHECK The tun -a -lite tube is also used for noise suppression between stations. Its operation can be checked as follows:
1. Sauelch switch adjusted to squelch (clockwise (right) position). 2. Disconnect oscillator, connect antenna, tune set to a position where no signal is received. Colee level at this
position should be quite high. 3. Rotate set screw of squelch control on rear flange of chassis, and at some point the noise should cease and the
set sound "dead", indicating that the tun -a -lite is squelching and eliminating between station noise.
'OTES: For failure to operate over both banda, check 2A7 tube and connections to and oontaots of wave changing switch. Condenser shaft to which pointer is attached is rotated by means of a celluloid dial attached to the condenser shaft and a bronze friction drive assembly, to which is attached the selector knob. Should this drive ever slip or beooms rough, it can be adjusted for smooth operation by sliding the bronze washer drive assembly either closer to the variable shaft cr farther away from it in the slot in which it is mounted, to insure smooth operation.
©John F. Rider, Publisher
www.americanradiohistory.com
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GAMBLE-SKOGMO, INC.
(1932)
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PAGE 7-80 GAMBIE
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'AGE 7-82 GAMBLE
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GAMBLE-SKOGMO, INC
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GAMBIE PAGE 7-83
GAMBLE-SKOGMO, INC.
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www.americanradiohistory.com
PAGE 7-84 GAMBLE
BODEL 2090
Alignment,Part 2 Socket,Voltage Speaker Connections
sat:w Notes,Transformer Data
GAIBLE-SKOGO, INC
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© John F. Rider, Publisher
www.americanradiohistory.com
(i.1Iß1.F,-SIO(rlO. 1\C.
GAMBLE PA(il', 7-85
YODELS 2092,2094
Ccherr,a.ti c
©John F. Rider, Publisher
www.americanradiohistory.com
'AGE 7-86 GAMBLE
Wá)II.S 2092,2094 Voltage,Alignment Rotee,Change
GAMBLE-ShOG1IO, INC.
Po. 2094 CI- IIS -VOLTAGES AT SOCKETS-LINE VOLTAGE 115
VOLUME CONTROL AT MAXIMUM
Type Position
of
of
Tube Tube
Function
Volts
"B" Volts
Control Grid
Volts
Screen Volts
Screen Current
Cathode Volts
Plate
Current MA
Grid Test MA
58
1
R.F.
2.35 125
.3(') 125
1.3
5.0
5.6
9.6
58
2
1st Det
2.35 115 5.0') 115
.6 10.0
2.9
3.5
58
3
I.F.
2.35 125
.3(h) 125
1.3
5.0
5.6
9.6
56
4
2nd Det.
2.30 170 12.0
12.0
.6
.6
46
5
Driver
2.25 215 18.0'9)
18.0 21.0
56
6
Osc.
2.30 130 7-15'4)
0"' 3.7 3.8
56
7
AVC
2.25
60'') 2.0f0'
85.0
0
0
46
8
Class B
2.25 310
0
6.0(7) 13.0
46
9
Class B
2.25 310
0
6.0(7) 13.0
280
10
Rect.
4.2
41
Per Plat.
-5 (1)
(2)
Actual Actual
Voltage Voltage
measured measured
across across
331,0000ohomhmbibaisaisngrerseisstiostro-r10
0 Volts. Volts.
(3) (4) (5) (6)
Read with Volume Control at minimum.
Varies Actual Actual
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resistor-16
to
36
Volts.
(7) Plate current at no signal.
Remove the 56 oscillator tube during
I.F. alignment. Alignment of the R.F. and oscillator circuits
is made at 1400 K.C. by means of the trimmer condensers mounted on the main tuning con-
denser. These should be adjusted to give maxi-
mum output on a 1400 K.C. oscillator signal with the receiver dial indicator set exactly at
1400. When maximum output has been obtained the oscillator is next set for a signal of 600
K.C. and the receiver tuned to this signal. The
dial reading should then be 600 but, if it is not exact, may be corrected by loosening the set screws which hold the drive disc and turning
the disc until correct reading is obtained. Alignment at 1400 K.C. will then have to be repeated.
OSCILLATION
A common cause of oscillation is open by-
pass condensers and these should be checked
by simple trial replacement. Coupling between I.F. grid and plate leads may cause the trouble and these leads should be separated and pushed close to the chassis. Too great R.F. gain in the
receiver may cause instability or oscillation and is corrected by removing four or five turns from
the primary of the ist detector transfomer.
This should not be done, however, until all other causes of oscillation have been investigated.
DISTORTION
Distorted reproduction may be brought about
by defective tubes and in any case of distortion these should be checked first. An inoperative 46 output tube will especially cause distortion due to harmonics in the output of the good tube not being balanced out by the other tube. Leaky or open bypass condensers may also cause dis-
tortion. The connections to the voice coil of one
speaker being reversed will cause a very noticeable distortion and these should be checked at
the terminal strip. Open field windings in either
speaker operation
will but
allow the receiver to continue at reduced volume and with some
distortion.
At low volume, distortion may be caused by a tone control rheostat having a resistance higher than the normal value of 50,000 ohms. Other resistors which will bring about distortion if they are high in value are the 20,000 ohm 2nd detector bias resistor and the 7,000 ohm resistor in the voltage dividing circuit which provides grid bias for the AVC tube. In case of distortion at low volume, therefore, these resistors should be checked with an ohmmeter and replaced if not within normal 101/4 limits.
EXCESSIVE HUM Excessive hum may be brought about by an open filter condenser or by an open circuit in one half of the 280 plate winding of the power transformer. Heater-cathode shorts in the 56 or 58 tubes will cause the hum to be higher than normal and new tubes should be tried in any case of excessive hum. Certain 46 tubes, when used in. the driver stage, will p'rdduce a hum much greater than normal and the tube in this socket should be inter -changed with the other two 46 tubes in the receiver. Shorted turns in the filter choke or 1,660 ohm speaker field will cause the receiver to hum as will various shorts, opens or grounds at different points in the chassis.
CHASJIS No. 2092
Chassis No. 2092 is practically the same as chassis No. 2094, except that it is designed for single speaker operation. A speaker having a 1,650 ohm field is used with this chassis and a tapped wire wound resistor is substituted for the field of the second speaker.
©.John F. Rider, Publisher
www.americanradiohistory.com
530-1720 RC 56-/5.8 MC
IF AAN-T/8C/5O/L
/F REGENERATION
TRIMMER /05.5
GAMBLE PAGr. 7-87 88
2 GANG CONOENSER-/657
WAVE 3W/TCN -1//8
/ªrOET-OSG
6A 7 l
GA M BTiE-S11OGNTll. INC.
MODEL 6953-A.
Schematic,Voltage
VOLTAGE TABLE Battery Voltage - 32 Volts
TriBmnner $,Notes
Parts List
Wave Band
- Broadcast
DYNAMIC SPEAKeRI\
7 TUBE
FILAMENT
PLATE
SCREEN
CATHODE
GRID NO.2
GRID NO. 3 & 6
6-400.=/8/7 \ I
8"O/A =/8/8
6A7 let Detector & Oscillator
6
32
.6
32
16
606 I. F. Amplifier
6
32
32
.6
IH.+.'t7-^-N I \g -2.,',07,U4 -71C7274
I
Mc/oO/aCE_II
I/ 20.43.I fi/4.40
75 2nd Detector & A.V.0
8
k;:lir 76 1st Audio
8
48 Output
6
48. Output
6
6e
30
30
32
30
32
* Triode plate complarative voltage only
5
Read all voltages from socket to chacals.
I i Co/L
IlI
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t t
6
or/TPUr TRAMJPMM7Ccl 1
7
SN/ELOEO L EAD
00025 MPD.
-7)..411 I
I
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A-/298
/. F.
60 6 7'
Ze.. 1F TRANS.
A -966E
r
I
2eo
PET
O/OGHTR/OPECA.C.
75
9
.0/ 4,1,`,0
7860
AUO/O TRANS Pon/ER OUTPUT
AUO/O AMP
/8/O
48
POWER OUTRA
48
L
I
1 II
v S/EARGR
.70CRGT
I
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7f
A
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56-158411
REG. TR/MMER
80-2004.141.f
0
.2 MPD
O
9032
---,
05C. CO/L
A-15/4
a a
/05.3
/ MEG. ft
t CONI 500 000.0.
~We 25,000.a.
8907
r\
FRONT
530 70 /720 PC.
PAOOER
NOTE: /. ALL NOS. 5'/O111A, RELA77VE To PARTS ARE OUR PART NUMDERS.
2. NUM8ER5 3NOWA1 W/TF/ A PREFIX 'A" ARE COMPLETE A55EMBL/E5.
3. /. F. - 4(05 K.C.
C OCAT/0N Of PAOOFRS TR./ME/95 IN L EfT NAND ¡FRONT) BOTTOM Of C>44.55/5
The power plug attached to the end of the power cord must be inserted correctly in the 32 volt power apply outlet or receptacle, otherwise the set will not operate. If after inserting the plug end turning the receiver on the eat does not operate after approximately two minutes, remove the plug and turn It half way around and reinsert It in the power receptacle.
FUSE: A receiver
3 ampere fuse le located on from damage should a defect
the back occur In
of the chassis adjacent to the speaker plug and protects the the set or if it is connected to the Improper power supply.
Continued burning out of fusee be referred to your dealer for
on the proper examination.
power supply THE WARRANTY
is IS
indicative of some defect and the receiver thou VOID IF THE RECEIVER IS OPERATED WITH THE FUSE
SHORTED OUT OR WITH A FUSE LARGER THAN 3 AMPERES.
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OROUND: pipe, or where it chassis.
It if is
is important that a good ground be used. A good ground clamp should be attached to a cold water no cold water pipe la available an iron pipe driven in the ground three or four feet in a place moist will be setiefectox7. Connect the ground to the black lead coming out at the rear of the
6..3 Voll P/LO9T0L2A3MPS
_) 32 VOLT D. G.
POWER SUPPLY
/60.11
2.2 fL
WIRE W00N0 RES. STRIP -/8/S
'ON -Or?' .54.V/TC/1
ON VOL. CONTROL
3 A/8MP/6FOSE
"Coronado" Model 6953A
PART NUMBER
LIST PRICE
1813 1814 1298 9862 1810 1657 1106 1641
1744
9023 111B 9799 1053 1054 1004 1341 1548 1816 7934 9458 1374
Antenna Coil Oscillator Coll Pirat I.P. Transformer Second I. F. Transformer Audio Transformer Two Gang Variable Condenser Drive Disc with Hub Calibrated Dial (Calibration No. 1653) with Frame and Gasket Glees for above Dial Calibrated Dial (Calibration No. 1745) with Frame and Gasket Glass for above Dial 6.3 Volt .15 Ampere Pilot Light Wave Switch Trimmer Condenser Padding Condenser Padding Condenser Volume Control and Off and On Switch Tone Control Switch Puse Block Receptacle 3 Ampere Puae .0001 Mfd. Moulded Condenser .00025 Mfd. Moulded Condenser .003 Mfd. Moulded Condenser
41.63 1.63 2.05 2.05 1.75 4.00 .30
.50 .35
.48 .35 .19 .75 .15 .50 .66 1.24 .39 .25 .12 .21 .21 .21
PRICES ARE SUBJECT TO CHANGE WITHOUT NOTICE
PART NUMBER
LIST PRU
1148 9032 9386 1147 6573 1808 7860 1815 1333 7998 6984 8907 8879 9386 8000 9089 6875 1179 1180 1206
1207 1817 1818
.5 Mfd. 200 Volt Condenser .2 Mfd. 200 Volt Condenser .1 Mfd. 200 Volt Condenser .05 Nfd. 200 Volt Condenser .01 Nfd. 200 Volt Condenser .15 Nfd. 200 Volt Condenser 01 Mfd. 400 Volt Condenser Resistor Strip 18;000 Ohm 1/2 Watt Resistor 1 Meg Ohm 1 3 Watt Resistor 500,000 Ohm 1 3 Watt Reeietor 25,000 Ohm 1 3 Watt Resistor 50,000 Ohm 1/3 Watt Resistor 15,000 Ohm 1/3 Watt Reeietor 100,000 Ohm 1/3 Watt Resistor 500 Ohm 1/3 Watt Resistor 250 Ohm 1/3 Watt Resistor Large Knob Small Knob with Dot Escutcheon Plate marked 'Foreign and
Broadcasts Escutcheon Plate marked On and Off. 6e Dynamic Speaker 8s Dynamic Speaker
.55 .23 .19 .17 .17 .17 .17 .96 .19 .I9 .19 .19 .19 .19 .19 .19 .19 .15 .17
.13 .13 7.25 9.00
)John F. Rider, Publisher
GAMBLE-SKOGMO. INC.
GAMBLE PAGE 7-89 MODEL, 6953-A
Alignent
SERVICE NOTES for the
SIX TUBE SUPERHETERODYNE RECEIVER TWO BAND
1720.to 530 Kilocycles 15.8 to 5.6 Megacycles
THIRTY-TWO VOLT
This receiver is designed for operation on 32 volt battery plants only and must not be used on battery plante of a higher rated voltage than 32 volte without a voltage regulator. If the rating is higher then 32 volts consult your dealer, who will supply the proper voltage regulator.
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INTERMEDIATE ALIGNMENT:
1. Connect the high side of the oscillator output to the
cep disconnected and connect a 1 ground side of the oscillator to
meg the
ohm resistor from the receiver ground lead.
control grid modulator grid
of to
the the
6A7 tube. chassis
Leave base.
the grid Connect the
2. Set the teat oscillator frequency to 465 kilocycles (this must be accurate).
3. Align the first intermediate transformer and decreasing capacity) until maximum reading
by is
turning one obtained on
of the trimmer screws up and down (Increasing the output meter, after which adjust the other
trimmer screw of the same transformer for maximum sensitivity.
4. Adjust the other intermediate transformers in the same manner.
NOTE: Two types of intermediate transformer parallel holes in the top of the shield, one
justing one trimmer, the other intermediate the brass hex nut. Regardless of which type
trimmers have been used in this receiver. One type hes two for each trimmer. The other type has a brass hex nut for adtrimmer being adjusted with the trimmer screw located inside of trimmer is used the procedure is the same.
5. Adjust sensitivity.
the If
IP regeneration trimmer located underneath the adjustment of this trimmer causes the receiver
chassis for maximum to oscillate always
465 kilocycle signal adjust to a point where
oscillation just stops, and then back off 1/8 turn.
TcccOoaonlndidAebeLnrInsaGseNterirsosTnHEtmowoiuVlnfAltoRelIdlAboeBwLoEnintchCtoeOhrNerDmpeErcNwotiSc.lEelRd:urTbeeheItgrietvfwieesonrricecomdiaplrosrettofaulnlbotlycya,twtehhdoeetnihroenarflwtuiihngsecnetiinuogntndheetrhasesriedgcieaennidgvoifecracttohewnedidlenlcosnhebarestsheiaisnndcswiephrnaicsdcuihdititinvhgeadvieaaanngddrtarmtit.rmhimeemrmdeiral
1. Connect the high output side of the test oscillator through a .00025 Mid. condenser to the set antenna lead and the ground to the set ground.
EBOFmhtittitscoiOaSXRehfhmhmuylsRsCAIgeeaea2nc.iICNag.gelgntLeTGcedehohrAtbtLLysteeteerLAYcsPpaeliIIipTltlernymNGnetptOeaam.a1NhorRck4ekTsuIeotsie,rHesNosssmEceGMSIwicimttdfitwgEEibee(ti.hl1TniCGlahlrso4elHalTAdetetlnElldIChaoeObMbTYtnroteNaoCEooiobRctsnLGgfeoraEcttdhEAOpCiotdrrtSFnCaEolptmaeuioYchIlsncanmteCiVoTdeaemextaoiLtnHlEtiefdnhicyEeERodvrgimte)cretasufthdthnhaSGAilem.oege.sTeunAIlstrfnNGhoeitdtGNec1staugoii4sCuAocvtnWsalCnwAnrLepaoshcleOiRdeufilMei,tNewEgtTtnEltcDnenhO.Ghlt1whEeasdeAh3aWtialNeeChMnUltSreYffddSlAoAtmE.oTioCXrerfetRrrwLIssfetghb.snEtBiMceaeeestSoWErUenrcet.shpMiybohctteevLTpecsetcthnrOAeoeylcaihoeaKaUoroeireoFpmEktkTnsldaniepN,iidPltdraldfnoeUajskeeiueogsnTtutSwtnatntftsoOhhdlhidetrainoBabaatisctgnYoTamhtipnhHsceofepfpgAckntAtborrtTihhteiDeiatghoetelenasqJhoiapxhnltleufUTsnpiiafe1fHgSrmtst5rnEThwafpoa.ooceItlhduextc8nryhtFeNojnaieoterrUGudckmlfnieNsaatfaaydumtoDtmTrtetnotwmHmeAneeefdatr1eEensMqsld5ahi31rent.Euyimm4t6rtaNseehmTamnlneTnetRdeom1cAmtwrIjgt3fameyLeoaMuariulgpgMsltcerswamueaEtotstcyacpPseaocRtecyyaEeegkyilnsmAcdeatbcvdECeKilkechptleOXsnseeayceaerNA,issAachntgDC,mNklehootoEbTDueecnntturNaLmehhsksiiitSnYee.emsNotnhEddmnhOcecto,ReeeT1ofrarov4rpsueeVei1acncatLTysarn4rcideeHMuoOsrteielaEnuiECeyoamactlmevGAnleeyaeTeAdigIabitti,tnECdfgarhMtrhvotDYeehAiencepraCeGniyrnttrlLEgnchhOtoeorEeNeglorsuxpdeSaPteeeteiic.nTpEccnruipaeadOuAetlslnrtisaPtKiiye.covtcdvoT,ophtrje1enHreehOeur4IoarEFerrwsSfdiINetsji1dmfcms4utTUdeipetoSosHgaeiEwntaElatDnt--k'
ed. 3. Set the band selector switch for operation on the broadcast band (1720-530 K.C.) adjust the test os-
cilletor frequency to EXACTLY 1400 KILOCYCLES and the receiver dial to EXACTLY 1400 KILOCYCLES. THEN BRING IN THE 1400 KILOCYCLE SIGNAL TO MAXIMUM OUTPUT BY ADJUSTING THE 1720-530 KILOCYCLE TRIMMER (see circuit diagram) mounted on one of the coils loceted underneath the chassis. Next adjust the trimmer located on the front section of the gang condenser for maxim m 1400 kilocycle signal sensitivity.
4. Leave the bend selector switch for operation on the broadcast band (1720-530 K.C.), tune the receiver dial and set the test oscillator frequency to approximately 600 kilocycles. While rocking the gang condenser slightly to the right and left adjust the 1720-530 kilocycle padder condenser which is located on and accessible through the small hole in the front of the chassis, for maximum sensitivity.
5. Recheck the 1400 kilocycle signal adjustment. 6. Place the band selector switch for operation on the short weve 15.8 to 5.6 megacycle band, set the test oscillator frequency to EXACTLY 14 MEGACYCLES and tune the receiver to EXACTLY 14 MEGACYCLES. While rocking the gang condenser slightly to the right and left adjust the 5.6 to15.8 megacycle trimmer (see circuit diagram) mounted on one of the coils underneath the chassie.
This completes the alignment and it is recommended that all the adjustments be gone over again, as generally it will be found that improved results can be obtained if this is done. Assuming that all tubes and component parts of the net are okeh, then extreme inaccuracies in the dial calibration, low sensitivity, and poor selectivity are indications that the alignment procedure has not been followed.
©John F. Rider, Publisher
PAGE 7-90 GAMBLE
MODII, 3128 Schematic
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PAGE 7-92 GAMBLE
FELS 7735,7742
7756
Alignment,Voltage
Parta Liet
GAMBLE-SKOGMO, INC.
SEVEN
SERVICE NOTES IoW Inc
BATTERY OPERATED TUBE SUPERHETERODYNE
RECEIVER
ALIGNMENT PROCEDURE: FOR PROPERLY ALIGNING EITHER THE INTERMEDIATE TRANSFOFBAER OR THE GANG CONDENSER IT IS NECESSARY THAT AN ACCURATELY CALIBRATED TEST OSCILLATOR BE USED WITH SO/E TYPE OF OUTPUT MEASURING DEVICE.
INTERMEDIATE ALIGNENT: 1. CONNECT THE HIGH SIDE OF THE TEST OSCILLATOR OUTPUT TO THE CONTROL GRID OF THE 106 TIRE LEAVING THE GRID CAP DISCONNECTED.
CONNECT THE GROUND SIDE OF THE TEST OSCILLATOR TO THE RECEIVER CHASSIS.
2. SET THE TEST OSCILLATOR FREQUENCY TO 465 KILOCYCLES (THIS MUST BE ACCURATE).
3. ALIGN THE FIRST INTERMEDIATE TRANSFORMER BY TURNING ONE OF THE TRIMMER SCREWS UP AND COULA UNTIL MAXIMUM READING IS OBTAINED ON THE OUTPUT METER, AND THEN ADJUST THE OTHER TRIMMER SCREW OF THE SAME TRANSFORMER FOR MAXIMUM SENSITIVITY.
4. ADJUST THE SECOND INTERMEDIATE TRANSFORMER IN THE SAME MANNER.
NOTE: TWO TYPE INTERMEDIATE TRANSFORMER TRIMMERS HAVE BEEN USED IN THIS RECEIVER. ONE TYPE HAS TUO PARALLEL HOLES IN THE TOP OF THE SHIELD, ONE FOR EACH TRIMMER. THE OTHER TYPE HAS A BRASS HEX NUR FOR ADJUSTING ONE TRIMMER, THE OTHER INTERMEDIATE TRIM'. MER BEING ADJUSTED WITH THE SCREW LOCATED INSIDE OF THE BRASS HEX NUT. REGARDLESS OF :1HICH TYPE TRIMMER IS USED THE PROCEDURE
IS THE SALE.
TO ALIGN THE VARIABLE CONDENSER: IT IS IMPORTANT WHEN ALIGNING TO FOLLOW THE PROCEDURE CAREFULLY, OTHERWISE THE RECEIVER WILL LACK SENSITIVITY AND THE DIAL CALIBRATION WILL BE INCORRECT.
1. CONNECT THE HIGH OUTPUT SIDE OF THE TEST OSCILLATOR TO THE RECEIVER ANTENNA LEAD A:'.D THE GROUND TO THE CHASSIS.
2. PLACE THE BAND SELECTOR SL"ITCH FOR 0: -ERAT ION ON THE SHORT SHAVE BAND, TUNE THE RECEIVER TO EXACTLY 15 MEGACYCLES ON THE DIAL, AND SET THE TEST OSCILLATOR FREQUENCY TO EXACTLY 15 MEGACYCLES. THEN TUNE IN THE 15 MEGACYCLE SIGNAL BY ADJUSTING THE TRIMMER MOUNTED ON TOP OF THE OSCILLATOR SECTION OF THE GANG CONDENSER TO MAXIMUM OUTPUT. LOOKING AT THE FRONT OF THE RECEIVER THE OSCILLATOR SECTION IS THE REAR SECTION OF THE GANG CONDENSER.
3. SET THE BAND SELECTOR SWITCH FOR OPERATION ON THE BROADCAST BAND, ADJUST THE TEST OSCILLATOR FREQUENCY TO 1400 KYLOCYC ES AND SET THE RECEIVER DIAL TO EXACTLY 1400 KILOCYCLES. NEXT. BRING IN THE 1400 KILOCYCLE SIGNAL TO MAXIMA OUTPUT BY ADJUSTING
THE TRIMMER LOCATED UNDERNEATH AND NEAR THE CENTER FRONT OF THE CHASSIS.
4. AFTER MAKING THIS ADJUSTMENT TUNE THE DIAL TO 1720 KILOCYCLES AND SET THE TEST OSCILLATOR FREQUENCY TO 1720 KILOCYCLES. IF THE 1720 KILOCYCLE SIGNAL CANNOT BE RECEIVED REOIICE THE 1400 KILOCYCLE TRIMMER CAPACITY UNTIL THE 1720 KILOCYCLE SIGNAL IS
BROUGHT IN.
5. NEXT, SET THE RECEIVER DIAL AND TEST OSCILLATOR TO EXACTLY 1400 KILOCYCLES, AND ADJUST THE TRIMMER LOCATED ON THE FRONT
SECTION OF THE GANG CONDENSER FOR MAXIMA SENSITIVITY.
6. LEAVE THE BAND SELECTOR SWITCH FOR OPERATION ON THE BROADCAST ELAND, TUNE THE RECEIVER, AND SET THE TEST OSCILLATOR TO APPROXIMATELY 600 KILOCYCLES. THEN ADJUST THE 600 KILOCYCLE PADDING CONDENSER, ':RICH IS LOCATED ON AND ACCESSIBLE THROUGH THE %AMR HOLE IN THE FRONT OF THE CHASSIS, FOR MAXIMUM SENSITIVITY. AS THIS ADJUSTMENT IS QUITE CRITICAL IT IS NECESSARY TO ROCK
THE CONDENSER SLIGHTLY TO THE RIGHT AND LEFT TO FIND THE POINT OF (NEATEST SENSITIVITY.
7. RACE THE BAND SELECTOR SWITCH FOR OPERATION ON THE WEPT ':LAVE BAND, ADJUST THE TEST OSCILLATOR FREQUENCY TO EXACTLY 15 MEGACYCLES ANC SET THE RECEIVER DIAL TO 15 MEGACYCLES. TURN THE RECEIVER ON ITS BACK '.'11TH THE DIAL UP AND ADJUST THE TRIMMER.
':.HIGH IS MOUNTED ON THE TOP OF THE COIL UNDERNEATH AND NEAR THE RIGHT HAND SIDE OF THE CHASSIS, FOR MAXILLA OUTPUT. BE SURE
TO ROCK THE. CONDENSER SLIGHTLY TO THE RIGHT AND LEFT '.HEN RAKING THIS ADJUSTMENT.
THIS COMPLETES THE ALIGNMENT PROCEDURE. IT IS RECOWENDED THAT ALL OF THE ADJUSTMENT, BE GONE OVER AGAIN. GENERALLY IT WILL BE FOUND THAT IMPROVED RESULTS CAN BE OBTAINED IF THIS IS DONE.
VOLTAGE TABLE
W U
"A" BATTERY - 3 VOLT DRY CELL "B" BATTERY - 3 45 VOLT "8" BATTERIES "C" BATTERY - 1 22# VOLT BATTERY
TUBE
FILAMENT
RATE
SCREEN
(RID ND. 2
OR ID ND. 3 AND 5
106 OSCILLATOR 8 1ST DETECTOR
2.1
135
115
67}
30 SECOND DETECTOR
2.1
34 INTERMEDIATE FREQUENCY
2.1
9
32 1ST AUDIO
2.1
30 DRIVER
2.1
19 OUTPUT
2.1
135
674
37.5
20.
135
135 EACH RATE
COMPARATIVE VOLTAGE ONLY.
TOTAL "B" DRAIN - .023 AMPERES
CS
READ ALL VOLTAGES FROM SOCKET TO CHASSIS.
TOTAL "A" DRAIN -- .620 AMPERES
WHEN MAKING TUBE VOLTAGE PECKS USE BATTERIES THAT DELIVER FULL VOLTAGE WITH THE RECEIVER TURNED ON.
8 U
PART NLADER
C
1113 ANTENNA COIL
El
1114 OSCILLATOR COIL
1296 1ST I. F. TRANSFOHMEF
E-4
9662 2ND I. F. TRANSFORMER
CWT
1331 AUDIO TRANSFORMER
ti pa
1291 4 RED. WET ELECTROLYTIC CONDENSER
1115 DAL .1 LED. 200 VOLT CONDENSER
D
7860 .01 LEO. 400 VOLT CONDENSER
0G
9032 .2 MED. 200 VOLT CONDENSER
9459 .0005 LED. MICA MOULD CONIDENSER
7934 .0001 LED. MICA MOULD CONDENSER 1374 .003 LED. MICA MOULD CONDENSER
1332 WIRE WOUND RESISTOR STRIP
7996
G CHI 1/3 WATT RESISTOR
027
10l 000 OHM 1/3 WATT RESISTOR
8906 250.000 Ow 1/3 WATT RESISTOR
6879 50,E OHM 1/3 WATT RESISTOR
A.
1335 SPEAKER
1118 WAVE SWITCH
1333 18,000 OHM 1/2 WATT RESISTOR
966993
1292
,000 O HM 1/33 WATT RESISTOR
255
OHM1BATTERY
6 CONDUC
CABLEWATTRESIST
1289 VOLUME CONTROL '.PITH D. P. S. T. STITCH
13141 TONE CONTROL SWITCH
LIST PRICE
$1.63 1.63 2.05 2.05
1.14) .85 .35 .17 .23
.21
.21 .21 .35 .19 .19 .19
6.2519
.75 .19
y.19
1.24 .40
PART N IeER
LIST PRICE
1103 1657
1106 1641
1641
1744
1741
1206 1207 1361 9988 1053 1054 9799 6-1 1179 1100 9750 1370
TWO GANG CONDENSER USED WITH EARLY TYPE DIAL TWO GANG CONDENSER USED WITH AEROPLANE TYPE
DIAL DRIVE DISC WITH METAL HUB CALIBRATED DNA[ (CALIBRATION #1371) WITH FRAME
AND GASKET CALIBRATED DIAL (CALIBRATION #1653) WITH FRAME
AND GASKET CALIBRATED DIAL (CALIBRATION #1405) WITH FRAME
AND GASKET CALIBRATED OIAL (CALIBRATION #1745). WITH FRAME
AND GASKET
BASS FOR ABOVE DIALS ESCUTCHEON RATE URRKED FORE URI AND BROADCAST
ESCUTCHEON PLATE MARKED ON ANO OFT TUBE SHIELD
TUBE SHIELD RIDDING CONDENSER
PADDING CONDENSER
TRIMMER CONDENSER VOLTAGE REGULATOR TUBE
KNOB, LARGE KNOB, SMALL WITH DOT KNOB, SMALL TUNING DIAL EARLY TYPE
$3.93
4.00 .32
.50
.50
.50
.50 .35 .13 .13 .15 .11 .50 .55 .15 3.00 .15 .17 .14 .30
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PAGE 7-2 GAROD
MODEL 60 Schematic Voltage Alignment
GAROD RADIO CORP.
TUBE 6A7 6E7 75
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NOTE:
VOLTAGE TABLE
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PAGE 74 GAROD
MODELS 32,37L91
Schematic
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GAROD RADIO CO.
GAROD PAGr. 7-3
MODELS 31,31LW, 32,32LW 33,33LW
Alignment, Vol tage
SERVICE NOTES FOR THE MODEL 33, 33LW, 31, 31LW, 32, 32LW
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ALIGNMENT PROCEDURE
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MODEL 33LW, 31LW, 32LW
I.F.ADJUSTMENT - The signal generator is set at 456 kc. The "hot" lead from the signal generator is connected to the grid cap on the 1st detector (6A7) tube, the clip having first been removed from the tube cap. The ground lead is connected to the receiver gnd. post. The oscillator section (front) of the gang tuning condenser is short-circuited and the volume control turned on full. The i.f. trimmers are then adjusted for maximum gain in the receiver. These trimmers are located on top of the i.f. transformer shield cans, which are situated in the rear of the chassis, to the left. The one nearest the front is the 1st 1.f. transformer and the rear one is the 2nd I.f. transformer.
16 MEGACYCLE ADJUSTMENT - The short-circuit is removed from the oscillator condenser and the grid clip replaced in its normal position on the cap of the 6A7 tube. The "hot" lead fron the signal generator is connected to the antenna post of the receiver and the ground lead to the ground post of the receiver. With the volume control set at maximum and a minimum input signal from the signal generator, the band switch is set at position no. 1 and the receiver dial set at 16 mc. The oscillator trimmer is adjusted e as to bring the signal in at this setting. This trimmer is found on the side of the oscillator coil shield can which is located directly in front of the i.f. transformers. The upper trimmer is the one for this wave -band. After the oscillator is adjusted, the antenna trimmer is adjusted for maximum output. This is found on the front of the antenna coil can which is directly in front of the 6A7 tube. The lower trimmer is the one for this band. There are no other
adjustments on this band.
1400 KILOCYCLE the procedure the receiver. for this band er one on the
ADJUSTMENT - With the receiver and signal generator both set at 1400 kc. outlined above is repeated. The trimmers are adjusted for maximum gain of These trimmers are located on the coil shield cans; the oscillator trimmer is the bottom one on the oscillator can; the detector trimmer, is the uppdetector or antenna coil can. The 600 kc. padder is on the front sub -panel,
OOKC PADDER ADJUSTMENT - With all connections as above, the signal generator is set at
00KC and the signal tuned in on the dial. The paddor for this frequency is found on the
front sub -panel of the receiver, directly under the wave band switch. This padder should
be adjusted for maximum response of the receiver, while the tuning condenser is rocked
slightly back and forth. The 1400 kc adjustment should then be rechecked.
LONG WAVE ADJUSTMENT - With the receiver and signal generator both set at 325 kc. the procedure outlined above is repeated. The trimmers are located on the left side panel of the chassis; the one towards the rear is the oscillator trimmer, and the one near the front is
the antenna trimmer. The series padder for this band is located in the lower left hand
corner of the front sub -panel.
MODEL 31 - 32 - 33
The alignment procedure for the Model 32 - 32LW is exactly the same as for the model 33LW, 31LW except for the location of the trimmers, and the designation of the bands. These are as follows:
Short wave band - Oscillator trimmer is the upper one on the oscillator coil can. Antenna trimmer is the lower one on the antenna coil can.
No series padder.
Broadcast band - Oscillator trimmer is the lower one on the antenna coil can. Antenna trimmer is the upper one on the antenna coil can. 600 kc. series padder is on the top of the chassis directly in front of
the oscillator coil.
Police band --
Trimmers are on the left side panel of the chassis. The one towards the rear is the oscillator shunt trimmer; the one towards the front is the
antenna shunt trimmer.
NOTE: These bands must be aligned in the sequence shown.
VOLTAGE TABLE
TIME_
6A7 6E7
6116
6F5 43 25Z5
FUNCTION
det.-osc. 1.f. ampl. diode det. 1st audio audio outp. rectifier
H'T'R
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---
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100.0
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--12.3 ---
OSC.PL. 90.0
NOTE: Fil. voltages measured with a low impedance AC -voltmeter. Actually, the voltages at 110V line are approximately 6 volts and 23 volts for the 6, 3, and 2 volt tubes respectively.
Model 32 exactly same as Model 31, but 600 kc. padder is located on the left front of the chassis. Model 32LW same as 31LW.
@John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-6 G.AROD
MODEL 35SW Schematic
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MODELS 49,491 Alignment Sockst,Trimnere
GAROD RADIO CORP.
SERVICE NOTES FOR THE MODEL 49M 10 TUBE 4 BAND A.C. SUPERHETERODYNE RECEIVER
ALIGNMENT PROCEDURE
Realignment of this receiver should not be attempted unless all other possible causes of faulty operation have been thoroughly investigated. An accurately calibrated signal generator which will cover the necessary wave-bands and-an output meter for indicating the effect of adjustments are required.
It le. important to remember that in receivers of this kind which are equipped with automatic volume control it is necessary to use the minimum possible signal from the signal generator;otherwise theA.V.C. action will tend to nullify the variations in output as the trimmers are adjusted.
I.F, ADJUSTMPT - The signal generator is set at 456 kc. and is connected to the grid of the first detector (6A7). With the oscillator section of the tuning condenser short-circuited and the receiver volume control at its maximum position, the 1.f. trimmers are adjusted for maximum output. These trimmers may be found on the 1.f. transformer shield cans in the rear of the chassis to the right and rear of the gang condenser.
18 MEGACYCLE ADJUSTMENT - The high side of the signal generator is connected to the antenna lead of the receiver and the low side to the ground lead. The receiver and the signal are both tuned to a frequency of 18 mc. with the selector switch in position for band no. 1. The oscillator trimmer condenser is adjusted so that thQl& mc signal is tuned in exactly as the 18 mc calibration point, with the volume control on full and the signal generator adjusted for minimum input. The antenna preselector and first detector trimmers are then adjusted in the order named for maximum output. These trimmers are located on the tops of the shield cans at the left side of the chassis; reading from front to back, these coils are as follows: 1. antenna pre selector; 2. first detector; 3. oscillator. It will be noted that there are four trimmers on each of these coils. The adjustment screw for the trimmer in the front left hand corner of each is painted red. This denote the trimmer for the no. 1 band.
MC. ADJUSTMENT - With the band selector switch in position for operation on band no. 2. and the receiver and signal generator both set at 5 mc. the procedure outlined above is repeated. The oscillator trimmer is found on the real coil can, and is located to the right of the red painted trimmer. The antenna preselector and interstage coil trimmers are located in the same positions on the corresponding shield cans.
The signal generator is set at 1.7 mc. and the signal tuned in on the dial. The padder condenser for this band is adjusted for maximum gain while the gang tuning condenser Is rocked slightly to the right and left. The 5 mc. adjustment should then be rechecked. The 1.7 mc. Padder is located on the sub -base on which the gang tuning condenser is mounted and is the left hand one at the group of three found here.
1400 KC. ADJUSTMENT - The band selector switch is set in position for operation on the no. 4 band. The receiver and signal generator are both set at 1400 kc. and the procedure outlined above is repeated. The oscillator trimmer Is found on the rear coil can, and is located diagonally opposite the red painted trimmer. The other trimmers for this band are located in similar positions on the corresponding coil cans.
The signal generator IS set at 600 kc. and the signal tuned in on the dial. The gadder condenser for this band is adjusted for maximum response while the gang tuning condenser is rocked slightly to the right and left. The 1400 kc. adjustment should then be rechecked. The 600 kc. padder is located on the sub -panel on which the gang tuning condenser is mounted and is the center of the three located at this point.
340 KC. ADJUSTMENT - The band selector switch is set in position for operation on band no. 4. The receiver and generator are both tuned to 340 kc. and the procedure outlined above is repeated. The oscillator trimmer is located on the rear coil can. It is the one directly behind the trimmer marked in red. The other trimmers for this band are located in similar positions on the corresponding shield cans.
The signal generator is set at 150 kc. and the signal is tuned in on the dial. The padder condenser for this band is adjusted for maximum response while the gang tuning condenser is rocked slightly to the right , and left. The 340 kc. adjustment should then be rechecked. The 150 kc. padder is located on the sub -panel on which the tuning condenser is mounted and is the right hand one of this group.
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GAROD RADIO CORP.
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MODELS 104,104M Alignment
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PAGE 7-12 GAROD
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PAGE 7-14 GAROD
MODEL 514 Alignment
Voltage
GAROD RADIO CORP.
SERVICE NOTES FOR THE MODEL 514 14 TUBE 5 BAND A.C.-D.C. SUPERHETERODYNE RECEIVER
ALIGNMENT PROCEDURE
I.F.ADJUSTMENT - The signal generator is set at 45b kc. and is connected to the grid of the first
detector (6A7). With the oscillator section of the tuning condenser short-circuited and the re-
ceiver volume control at its maximum position, the 1.f. trimmers are adjusted for maximum output.
These third
trimmers may be found on the 1.f. transformer shield cans in the rear of i.f. transformer has only one trimmer. This is the one at the left rear
the chassis. The of the chassis.
The other two transformers have two trimmers each.
18 MEGACYCLE ADJUSTMENT - The high side of the signal generator is connected to the antenna lead of the receiver and the low side to the ground lead. The receiver and the signal are both tuned to a frequency of 18 mc. with the selector switch in position for band no. 2. The oscillator trimmer condenser is adjusted so that the 18 mc signal is tuned in exactly as the 18 mc calibration point, with the volume control on full and the signal generator adjusted for minimum input. The antenna preselector and first detector trimmers are then adjusted in the order named for maximum output. These trimmers are located on the tops of the shield cans at the left side of the chassis; reading from front to back, these coils are as follows: - 1. antenna preselector; 2. first detector; 3. oscillator. It will be noted that there are four trimmers on each of these coils. The adjustment screw for the trimmer in the front left hand corner of each is painted red. This denote the trimmer for the no. 2 band.
j6 MEGACYCLE ADJUSTMENT - With the band switch in position for the no. 1 band, the receiver and signal generator are both set at 36 mc. and the procedure outlined above is repeated. There is no
oscillator trimmer for this band, a harmonic from the no. 2 band of the oscillator being used. The trimmer for the preselector stage is located on the underside of the chassis near the front and center. The first detector or interstage trimmer is located behind the band selector switch, also on the underside of the chassis.
5.2 MC. ADJUSTMENT - With the receiver and signal generator oscillator trimmer is found on mer. The antenna preselector corresponding shield cans.
band selector switch both set at 5.2 mc.
the rear coil can, and interstage coil
in position for operation on band no. 3. and the procedure outlined above is repeated. The and is located to the right of the red painted trimmers are located in the same positions on
the
trim. the
The signal generator is set at 1.7 mc. and the signal tuned in on the dial. The gadder condenser for this band is adjusted for maximum gain while the gang tuning condenser is rocked slightly to the right and left. The 5.2 mc. adjustment should then be rechecked. The 1.7 mc. Padder is located on the subbase on which the gang tuning condenser is mounted and is the left hand one at the group of three found here.
1400 XC. ADJUSTMENT - The band selector switch is set in position for operation on the no. 4 band. The receiver and signal generator are both set at 1400 kc. and the procedure outlined above is repeated. The oscillator trimmer is found on the rear coil can, and is located diagonally opposite the red painted trimmer. The other trimmers for this band are located in similar positions on the corresponding coil cans.
The signal generator is set at 600 kc. and the signal tuned in on the dial. The padder condenser for
this band is adjusted for right and left. The 1400 the sub -panel on which the this point.
maximum response while kc. adjustment should
gang tuning condenser
the gang tuning condenser is rocked slightly to the then be rechecked. The 600 kc. padder is located on
is mounted and is the center of the three located at
340 KC. ADJUSTMENT - The band selector switch is set in position for operation on band no. 4. The receiver.and generator are both tuned to 340 kc. and the procedure outlined above is repeated. The oscillator trimmer is located on the rear coil can. It is the one directly behind the trimmer marked in red. The other trimmers for this band are located in similar positions on the corresponding shield cans.
The signal generator is set at 140 kc. and the signal is tuned in on the dial. The padder condenser for this band is adjusted for maximum response while the gang tuning condenser is rocked slightly to the right and left. The 340 kc. adjustment should then be rechecked. The 14o kc. padder is located on the sub -panel on which the tuning condenser is mounted and is the right hand one of this group.
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G. E. PAGE 7-1
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PAGE 7-2 G. E.
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PAGE 7-4 G. E.
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G. E. PAGE 7-9
MODELS E-61,E-62,E-68
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PAGE 7-10 G. E.
MODELS E-61,E -62.E-68 Chassie Wiring,
Circuit Data.Coil Data
(rN.NERAI. EL.F.C"FRIC CO.
DESCRIPTION OF ELECTRICAL CIRCUIT bined with the local oscillator signal which is 465 KC
Models E-61, E-62 and E-68 employ six metal en- higher in frequency. The local signal is generated by
velope tubes in a superheterodyne circuit giving the excellent selectivity and sensitivity inherent in this type circuit. Ample undistorted output is obtained through diode detection and two high gain audio
the oscillator elements of this tube, and the proper frequency difference is maintained, throughout the tuning range by the front section of the main tuning condenser in conjunction with the oscillator coil and
amplifier stages.
padding capacitors.
The signal from the antenna is applied to the control grid of the 6A8 tube through the R. F. coil, the secondary of which is tuned to the incoming signal by the rear section of the main tuning condenser. In the 6A8 tube the incoming signal is com-
The combination of the two signals produces the intermediate frequency of 465 kilocycles. This particular intermediate frequency is chosen to reduce image response and improve short-wave performance. The intermediate frequency amplifier consists of a 6K7
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G. E. PAGE 7-11
MODELS E-61,E-62,F'-68 Socket,Trimnere Circuit Data,Part 2
tube and two I. F. transformers, each with two tuned circuits. An I. F. wave trap is provided across the antenna and ground terminals to eliminate interfering signals of the intermediate frequency.
receiver. The output of the 6F5 tube is resistance coupled to the grid of the 6F6 power amplifier pentode. The plate circuit of the 6F6 is suitably matched to the loud -speaker by means of a step-down output
The output of the I. F. amplifier is applied to one plate of the 6H6 diode rectifier, which is a combined detector, initial bias and automatic volume control tube. The direct-current component of the rectified signal, through one diode of the 6H6, produces a voltage drop across R-3. This voltage drop provides automatic bias for the converter and I. F. amplifier tubes and so gives automatic volume control action. The other diode of the 6116 provides an initial bias for the tubes on the automatic volume control circuit under conditions of little or no signal. This initial
transformer. The tone control circuit consists of a .003 mfd.
capacitor, connected in series with a two point grounding switch, S-2, in the grid circuit of the 6F6 power pentode. When it is desired to reduce the high frequency output of the receiver, the switch, S-2, is turned to its counterclockwise grounding position.
Plate and grid voltages for all tubes are supplied by the power supply system employing a 5W4 full -wave rectifier tube which, together with a suitable network of resistors and capacitors, supplies the required volt-
bias diode, under conditions of small signal, draws ages and filtering action.
current which flows through resistors R-2 and R-3.
The resulting voltage is the required minimum
operating bias for the controlled tubes. Upon receiv-
ing signals above the level of the initial bias, the initial bias diode stops drawing current and the auto-
ALIGNMENT FREQUENCIES
matic volume control diode takes over the controlling I. F.
Broadcast
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465 KC
580 KC
465 KC
The manual volume control, R-5, selects the amount
1500 KC
of audio signal applied to the grid off the 6F5 audio
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www.americanradiohistory.com
PAGE 7-12 G. E.
MODELS E -61,E-62,E-68
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GENERAI. ELECTRIC CO.
G. E. PAGE 7-13
MODELS E-71, E-72, E-?6 Schematic, Data
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PAGE 7-14 G. E.
MODELS E-71,E-72,F-76 Chassis Wiring Transformer Data
GENERAL EI11,JCTI`ICv CO.
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GENERAL }I}ClRIC CO.
G. E. PAGE 7-15
MODE{. S E-71,J -72,E-76
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7216 G. E.
MODEL S E-71, E-72 ,E-76
Parte List
GENERAL, ELEC'T'RIC CO.
k SÑo
Description
List Stock
Price
No.
Description
List Price
(C-16) *RB-026
BOARD Board
-.A..n..te.n..n.a...&...G..ro..u.n.d...T.e.r.m..in.a.l
$0.10
RB -040
BOARD ---Terminal
Padder...
Board...N. ear
O.s.c.il.l.
................. RB -044 BOARD-Terminal Board on Front Wall
RB -134 BRnAeaCr KVEoTlu-mDeiaClonLtrigohl t Bracket.........
.10
.10 .15
RB -135 RC -014 RC -017 RC -018
............................. BCARAPACCKIETTO-RD-.i0a0l 3Sumppfdo.r,t
Bracket 200 volt,
.
Paper
$0.15
(C-22).
CAPACITOR-.0045 mfd., 200 volt, Paper
.25
CA(CP-A19C)IT..O.R..-...0.0.4..m..f.d..,..6.0.0..v.o.l.t.,.P.a.p.e.r
25 30
*RC -024 CAPACITOR -.005 mfd., 200 volt, Paper
............................. *RC -029
(C-24).
CAPACITOR -.005 mfd., 400 volt, Paper
$0.25
.......................................................... *RC -034 CA(CP-A2C0)I.TOR-.01 mfd., 200 volt, Paper (C-21).
RS RC-036 CAPACITOR-.008 mfd., 200 volt, Paper
.30 .25
.............................. *RC-072 CA(CP-A26C)ITOR-.05 mfd, 200 volt, Paper .25
..................... *RC-080 CA(CP-A4,CCIT-1O1R, C-.-0122) mfd., 400 volt, Paper .25
............................. *RC-091
.............. RT *RC-096 RT *RC-123
- RC-218
RC -235
.......... RC-261
*RC -344
............... *RC-412
CCCCCCCCAAAAAAAA((((3CCCC4PPPPPPPP-,---AAAAAAAA5716C,,CCCCCCCC4)-.CC)3IIIIIIII.9TTTTTTTT--19)OOOOOOOO3, )RRRRRRRRC---------113..5..12...011003.050)5000mm0m.m...mmmfm.ffm.dddmmf.f.d..m.,d,,f.f.d2..,df.,d..8...24,,4M.0._00,.0MM00vi0M.c.oi.i.acc..il.vvvact.a..(,oo.ao..WC(ll:.l(ttCt(.C.,,,-eC.-8-t.2-3PPP..)2E35..aaa.3l,...)ppp.e.)....Ceec..e.........-rr-r
.25
.30 .30 .35 .25 .25 .25 .35
....................... RC-413 CAttrrPooAllyyCttiiIccT((OCCR-2--)11. 6)..m..f.d...,.3..40 vol.t,.W. et Elec-
*RC -608 CAPACITOR -Oscillator Padder, 300-500
1.20 1.25
.............. mmfd. (C-15): RW-005 RC-618 CAPACITOR-Trimmer Capacitor (On
40
................... RC-710
COLNowDeEr NFrSoEnRt W-Tawll)o(C-g-a3n7g,
C-38).... Tuning
Con-
.25
RC -754
CAdPenAsCerI,T1O0-R45-2Lminmefd.
(C-29, C-30) Capacitor,
.
.01-.01
3.60
RC -815 *RC -854
.............................. RD -030 .................... RD -032
RD -034 RF -010
CCDAORmBRUfLDdM.E,---P2CD5o0owinavdeolelrtCnCÁasob.eCrlrde.,Da(PCnrkdi-v1geP7. l,oDufCg5r-1u.8m.).. ............................
DIAL-Dial Scale.
DRIVE-Condenser Drive FOOT -Chassis Mounting
Foot..................
.40
.50 .60 .40 .30 1.10 .30
*RG-001 GRID CAP-Control Grid Cap, Pkg. of 5.. .10
*RK-004 KNOB -Control Knob (Without Dot),
............................ *RK-005
Pkg. KNOB
-oCf 5ontrol
Knob
(With Dot), Pkg
.40
............................... RL-121 COIL-R.F. Coil Band D (L-7, L-8).......
50 .75
RL........ ..................... -12 COIL-R.F. or Band and C (L-5, L-13;
............ L-6, L-14)
..
1.10
RL-223 COIL-Osc. Coil Band D (L-11, L-'12)....
.70
RL-224 COIL-Osc. Coil Band B and C (L-9, L-15;
RP-042
.............. RP-045
PPUOLINLTEYER-D-DiailalPuPloleinyt,ePrkagn.doGf 2u.i.d.e............
1.00 .25
.10
............ RP-046
PLATE-R.F. Coil Shield........
U..n.i.t..E.nd
Plate
with
RQ-047 RESISTOR-330 ohms, % watt, Carbon
.25
................. (R-18), Pkg. of 5 ................. 5......... RQ-067 RESISTOR-2200 ohms, % watt, Carbon
*RQ-083 RE(RSI-4S,TRO-R7,-R10-8,)0,0P0kgo.homfs, % watt, Carbon
.60 .60
................. (RR-021) (R-15), Pkg. of 5
.60
RR -905 RS -136 RS -137 RS -164
*RS -200 *RS -204
-321 RS -323 RS -415 RS -423 RS -858
-074 -075 RT -076
RT -223
RT -224 RV -014
*RW-101 *RW-102 RW-400 RX-016
REFLECTOR-Dial Light Reflector .
--58 SSSSSSOOWWHHCCIIIIEETTKKLLCCEEDDHHTT----C3BTrhaodaPPnnsiiIdnnes.FiTTCs.CuuoESbbhnnheeatdirneoSSlgSdlooehccSCikkweSaeelniwdttt,,ci(hPPtEckkh-(gg7SC..6(-aooS3onff-n).551.l.y)......).......
SSSCPPCPDRRRkarIIEgubNNW.mleGGo,SfP--P1-uSKkSlpl0gnee.ry.oito,.nfb.Pg.1kS.gSc.0.prp.er.o.Bwi'.f.nrs..2ga..c...k..f.(o.e.P..r.t.u...s..D.h..S.i-.a.ou.l.np...p..D.to...y..rr.pt..i.iev..n..)..e,
TR1A15NvSoFltOs,R50M-6E0Rc-yPcloesw(Teer-1)T.r.a.n.s.f.o..rm..e..r,
TR1A15NvSoFltOs,R25M-6E0Rc-yPcloesw(eTr-1)T..r.a.n.s.f.or.m..e..r.,
TRANSFORMER Universal Power
Transformer, 105-130 volts and 200-250
TRvAolNtsS, 4F0O-6R0McyEcRle-s1(Tst-1a)nd 2nd I.F. Trans-
former (Complete) (L-1, L-2; C-35, C-36)
TR(AL-N22S,FLO-2R3M; CE-4R1-,3Cr-d42) I.F. Transform-
er (Complete) (L-3, L-4; C-31, C-32).....
VOLUME CONTROL -Volume Control
and Power Switch, 2.2 meg. Total Res.
WW(AIRNS-D1H3OE, WRS--2-F)Deilatl
Window......... ......
Washers for Control
Shafts, Pkg. of 10..
WASHER -Insulating
irlg Electrolytic Cap,
PWkga.sohfer1f0or..M..o..u.n.t.-
WAVE TRAP COMPLETE -(L-17, C-3)..
MOUNTING ASSEMBLY -Screws and
Cushions for Mounting Tuning Con -
denser
RC -909 RC -990 *RP -012 RP-044 RP -052 RP -053 RS -030
RS -416 RT -413
SPEAKER ASSEMBLIES E-71 AND E-72
COGNasEk-e8t (-Lin.-1C8on)e...a.n.d...V..o.i.c.e...C.o.i.l..a..n.d
CLAMP -Cone Spider Clamp
PLUG-Female Speaker Plug
PLUG-Male Speaker Plug
PLUG-Female Speaker Plug (Late Pro-
PLdUuGct-ioMn)ale
Speaker
l .. Plug
(Late
Produc-
-8 tion)
SPEAKER -in. Reproducer Unit Com-
plete
_2
with
Transforme.r..(L..-1.8.,..L.-.1.9.,.L..-2.0.,
SPRING-V.C. Leads Spring, Pkg. of 2....
TRANSFORMER-Outpput Transformer
T-2)
,
,, _
.
SPEAKER ASSEMBLIES E-76
$0.15 .20 .30 .75 75 .30
1.25 .10 .25 .10
4.50 8.35
8.50
1.50 1.75
1.15 .15 .45 .20 .80
30
1.15 .05 .20 .20 20 .20
7.40 .10
1.30
RQ-099
RESISTOR -47,000 (R-6), Pkg. of 5....
o.h.m.s.,..%..w..a.t.t,.C..a.r.b.o.n
RQ-103
RESISTOR -68,000
(R-16), Pkg, of 5..
.o.h.m.s.,..%..w..a.t.t,.C..a.r.b.o.n
................. *RQ-107 RESISTOR-100,000 ohms, % watt, Car-
(RR -050) bon (R-10), Pkg. of 5.
.60 .60 .70
RC -910 RC -991 *RP -012 RP -044
CCPPLLOLGUUANaGGMsEk---PMeF1t-e2C(amL-lo-iean1n.8lSee)p.CSSe.opap.nike.deae.ekr.rae.PCnr.dl.Plu.al.Vmgu.o..gip..c..e..........C.......o.'...i...l.........a....n.......d
1.45 .05 .20
.20
RQ-115 RQ-123 RQ-127
................. RESISTOR-220,000 ohms, % watt, Car-
bon (R-14), Pkg. of 5.
.70
5...................70 ................. RESISTOR-470,000 ohms, % watt, Car-
bon (R-12), Pkg. of 5.
RESISTOR-680,000 ohms, 4 watt, Car-
.70
bon (R-11), Pkg. of
RP -052 RP -053 RS -031
PLdUuGc-Ftieomna)le...S.p..e.a.k.e.r..P..l.u.g...(.L.a.t.e...P.r.o.PSLPtUEiAGoK-nME)R.a.-l.e1.2.S.p-.ie.na..k.R.e.re.pP.r.lou.d.gu.c.(e.Lr.a.t.Ue.n.Pi.t.ro.Cd.o.um.c.--
plete with Transformer (L-18, L-19, L-20,
20 20
5....................70 RQ-139 RESISTOR-2.2 megohms, % watt, Car-
RR-716 REbSoInS(TRO-9R),-TPkagp.pofed Bleeder Resistor
(R-1, R-2, R-3, R-4, R-5). .. .. .. ..
.90
RS -416 RT -413
STPR(RTA-IN2N)SG.F.O-.V.R..MC...E.L.R.e-a.Od.s.u.St.pp.ru.in.tg.,..PT.kr.ga..n.so.ff.o2.rm....e...r
.10 1.30
* Indicates part also used on 1936 "A" line receivers.
1
PRICES ARE SUBJECT TO CHANGE WITHOUT NOT ICE
John F. Rider, Publisher
www.americanradiohistory.com
GENERAL ELECTRIC CO.
G. E. PAGE 7-17
MODELS E-81,E-86
Schematic
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PAGE 7-18 G. E.
MODELS E -81,E-86 Chassis ?firing
GENERAL ELECTRIC CO.
j ä
1111010-
Radio Receivers, Models E-81 and E-86 RBS-24 ©John F. Rider, Publisher
www.americanradiohistory.com
GENERAL ELECTRIC CO.
G. E. PAGE 7-19
MODELS E -81,E.-66 Circuit Data
ALL-WAVE RECEIVERS
SUPERHETERODYNE Amt.: MU 13N1
MODELS E-81 AND E-86
Physical Specifications
Model Height Width Depth Weight packed
E-81 19% in. 15% in. 115¢ in. 38 lb
E-86
39 in. 24 in. 11{g in. 63 lb
Electrical Specifications
Rating Label
Power Supply (Volta)
Frequency (Cycles)
Power Consumption (Watts)
A
115
50-60
100
116
25-60
100
105-130
40-60
105
and
200-250
NOTE -Taps on universal transformen (Rating "V") are
accessible by removing the cap cover on the top of the trans-
former.
Tuning Frequency Range
Band "B" Band "C" Band "D"
540-1880 kc. 1680-6000 kc. 6.0-18.0 mc. (6,000-18,000 kc.)
Tuning Control Drive Ratio
Fast Tuning Vernier Tuning
8 to I 40 to 1
Electrical Power Output
Undistorted Maximum
6.5 watts 14.0 watts
Load-speaker-Electrodynamic
Cone: Model E-81
8 inch
......... Model E-86
12 inch
Cone Coil Impedance at 400 cycles.
5.5 ohms
Tubes
R. F. Amplifier' Converter and
Oscillator First
I. F. Amplifier
Second I. P. Amplifier
Detector and AVC Audio Amplifier Output Power Rectifier Dial Lamps
6K7 Triple -grid Super -control Amplifier
6A8 Pentagrid Converter
-
6K7 Triple -grid Super -control Amplifier
6K7 Triple-grid Super-control Amplifier 6H6 Twin Diode 6P5 High Gain Triode 6L6 Beam Power Amplifier Tetrode 524 Full -wave Rectifier MAMA No. 46
DESCRIPTION OF ELECTRICAL CIRCUIT
Models E-81 and E-66 employ eight metal envelope tuba in a superheterodyne circuit, giving the excellent sensitivity and selectivity inherent in this type circuit. The radio frequency section of this eight -tube chassis utilisa a novel type
of construction known as the "Junior Sentry Bus." This type construction permits using extremely short connecting leads and isolates each radio frequency circuit in its own particular shielded section. Separate groups of coils are used for each band in the oscillator section. The antenna and R. F. sections are composed of two coils, a separate coil for the
"D" band and a composite coil for the "B" band and "C" band. Operation on the "C" band is obtained by shorting out a section of the antenna and R. F. "B" band coils.
The signal from the antenna is applied to the control grid of the 6K7 R. F. amplifier tube through the antenna coil, the secondary of which is tuned to the incoming signal by the rear section of the main tuning condenser. The antenna coil,
for bands "B" and "C," contains two primary coils connected for operation on the "B" band; however, when the band switch is turned to the "C" band position, the lower
primary coil, L-5, is shorted out. The high frequency trimming
adjustment, for the "B" band antenna and R. F. stages, is
accomplished by two adjustable trimmers connected from the
"C" band tap on each coil to ground. The capacity coupling coil. L-3, acts only on the "C" band and its function is
similar to that of a fixed antenna stage trimmer for that band. The amplified radio frequency signal is impressed upon the
signal control grid of the 6A8 converter tube through the R. P. coil, the secondary of which is tuned to the signal
frequency by the center section of the main tuning condenser. In the 6A8 tube, the incoming signal is combined with the local oscillator signal which is 465 kc. different in
frequency. .The local signal is generated by the oscillator elements of this tube and the proper frequency difference is maintained throughout the tuning range by the front section of the main tuning condenser in conjunction with the oscillator coils and padding capacitors.
The combination of the signal frequency with the local oscillator frequency in the BAS converter tube produces the intermediate frequency of 485 kilocycles. This particular intermediate frequency is chosen to reduce image respoase
end improve short-wave performance.
The intermediate frequency amplifier consists of a two stage cascade section composed of three I. F. transformers
and two 81(7 amplifier tubes. Each I. F. transformer has two tuned circuits. The fins I. P. amplifier BK7 is operated on both self bias and on AVC for the broadcast band, since its grid return connects to the AVC bus. On the two short-wave bands the self bras resistor is shorted out by one of the band switch sections and this tube receives only AVC bias. The second I.F. amplifier MC7 tube operates on self bias for all bands. This enables the second I.P. tube to provide maximum power to the OHS diode rectifier.
The output of the I.F. amplifier is applied to one plate of the OHS diode rectifier, which is a combined second detector, initial bias and automatic volume control tube. The direct current component of the rectified signal, through one diode of this tube, producen a voltage drop across resistor R-10. This voltage drop provides automatic bias for the R. F. amplifier, converter and the fast I.F. amplifier, and thus gives automatic volume control action. The other diode of the 6H6 provides an initial bias foe the tubes on the AVC circuit under conditionsmf little or no signal. This initial bias diode, under conditions of small signal, draws current which flows through resistors R-9 and R-10. The resulting voltage is the required minimum operating bins for the tubes on the AVC circuit. Upon receiving signals above the level of the initial bias, the initial bias diode stops drawing current and the automatic volume control diode takes over the controlling
bias. The audio frequency present across R-10 is impressed upon
the volume control R-15 through capacitor C-34. The mov-
able arm on the volume control selects the amount of audio
signal applied to the control grid of the 6F5 audio amplifier tube and thus regulates the output of the receiver. Across the volume control, R-15, is placed a compensating network of capacitors and a resistor. The music-speech switch is found in this circuit, and when closed places capacitor C-38 in shunt with C-39, which results in the accentuation of the low audio frequencies. The output of the 6F5 audio tube is resistance coupled to the grid of the 6L6 beam power tetrode. The plate circuit of the 61,8 is suitably matched to the electrodynamic loudspeaker by means of a step-down output trans-
former. The tone control is found in the plate circuit of the 6P5
first audio tube and consists of capacitor C-43 in series with a variable resistor R-18 across the 6F5 plate resistor R-17. Cutting out resistance in R-18 lessens the treble response of the receiver. Between the plate of the SF5 first audio tube and the grid of the 61.8 tetrode output tube are found
two capacitors in series, C-41 and C-42. The smaller capacitor, C-42, is shorted out by the wave band switch for operation
on the broadcast band. On the two short-wave bands it is left in the circuit to attenuate the low frequency response and
thereby lessen the tendency toward microphone howl. Plate and grid voltages. for all tubes are supplied by the
power supply system employing a 524 full -wave rectifier tube;
which, together with a suitable network of resistors and capacitors, supplies the required voltages and filtering action.
ALIGNMENT PROCEDURE
The receiveerr should first be allowed to run for fifteen minutes to reach its approximate normal operating temperature. Before making any adjustments, it is wise to determine the correctness of the existing alignment. This
may be done by supplying a signal from the tat oscillator
to the receiver and inserting a "Tuning Wand" into the coil
I WAVE TRAPI
-18V
involved. The tuning wand consists of a rod of insulating
material having a ring of nonmagnetic metal attached to one
end, and a small core of finely divided iron compacted into the opposite end. By inserting the metal ring end into the center of a particular coil the inductance of the coil is lowered,
increasing its resonant frequency. Inserting the iron -filled end into the coil raises its inductance, lowering its resonant frequency. If the circuits are in exact alignment, inserting either end of the tuning wand in any coil will result in a decrease in output. When an increase in signal is obtained with the iron -filled end of the wand, a decrease in resonant frequency of that circuit by increasing its trimmer capacity is indicated. When an increase in signal is obtained with the metal ring, a decrease in trimmer capacity is indicated.
Wand Metal ring Iron filings
Changes Indicated by Wand
Signal
Decrease Decrease
Timmer adjustment required
l f
None
Metal ring Iron filings
Increase . Decrease 1
Decrease capacity
Metal ring Iron filings
Decrease Increase
Increase capacity
Alignment Frequencies
I.F.
Band "B" "Band "C" Band "D"
485 kc.
580 kc.
5220 kc. 18,000 kc.
1500 kc.
In order to align this receiver properly, it is necessary to
have available the following tat equipment:
I. A modulated teat oscillator with frequencies available
of 465, 580, 1500, 5220, and 18,000 kc.
2. An output indicator, such as a high resistance a-c. voltmeter with a maximum scale reading of 3 to b volts, or
a neon lamp indicator.
3. An alignment tool consisting of an insulating shaft with a small screwdriver blade.
4. A tuning wand.
The location of all trimmer capacitors is shown in Fig. 3.
I. I. F. Alignment
Set the frequency band switch of the receiver to Band
"D," short circuit the antenna and ground terminals and
tune the receiver to some point near maximum tuning
condenser capacity where no signal is heard. Set the volume
at its maximum position and ground the chassis.
coTnthroel I. F. amplifier is tuned to 465 kc.; set the test oscillator
so as to produce a signal at this frequency. Connect the test
oscillator output between the top grid terminal of the 6K7
2nd 4. P. tube and the chassis using a .05-cued. capacitor
(RC -072) in series with the oscillator output lead to the top
grid connection. First remove the grid lead connecting
to the same point from the 2nd I. P. transformer. Provide
path for grid bias by connecting a I0,000 -ohm resistor
(RQ-083) between grid cap and top grid terminal of tube.
Connect the output meter across the voice coil of the
speaker and adjust the test oscillator output control so that,
with the receiver volume control at maximum, a small
deflection is observed in the output meter. During both I. F.
and R. F. alignment, the test oscillator signal should be
maintained at the lowest level that will give a good readable
output indication.
Adjust thésecondary trimmer of the third I. F. transformer
until a maximum output reading i obtained. Maintain a
small deflection on the output meter throughout alignment
by adjusting the tat oscillator output. Next, adjust the
primary trimmer of the third 1. F. transformer for maximum
output. This transformer is then adjusted and should not
require readjustment when aligning transformera ahead of
-- it.
530 V.-
GS'..]:l.,idA
Cl
485 KC
\1500 KC 5220 KC C R C14 C 0PIP, --Y amaY aaauY f_.1 eseawa ,......j..72/ e0 KC \MEWED
r
-
300 V.-
1370 V.
Q -370 V. TPUT
II AI
O _O
C 160o2 KC
C3 18000
KC 1001f
C7 C10 1600 KC 18000 KC
(OoI 8.3 V
»NV ..-Y AC.
lee 85
VV!-
5RT ONV06C.EER
® Q
-
-6JVAC
-25.
----2-917j. (lumen rr wmnr)
/ V.AC.
-275 V. 250e.
)
\\
i.: \6.SV.AC.
8.3 AC
CD'-' /
Q f_A
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\\ / Etegj',F. % ro 486 KC.
©
\ 100 V.
7V A®(1
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24100V0
4' QC
\ w150 V g IQI.F. I
485 KC.
9 /
0 ©®
00
250 V.
ODIO AYPL.
I8.5VAC.
IOETECTORI 8AV.CC
BAIV. AC.
G ©
1.5 V.
r.
as.wf
I
I
I
FROM UNDERSIDE OF CHASSIS
PER MIA VD1.141l Me.
Fig. 3. Trimmer Location and Socket Voltages
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-20 G. E.
MODELS E-81,E--86 Alignment,Parte Voltage,Dial Data
82222g Ñ$ ä
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®John F. Rider, Publisher
www.americanradiohistory.com
GENF.RAI, h:LECTRIC CO.
G. E. PAGE 7-21
John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-22 G. E.
JJohn F. Rider, Publisher
www.americanradiohistory.com
G. E. PAGE 7-23
3John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-24 G. E.
MODELS A-83 ,A-8 5
Socket,Trimmers Voltage,Dial Data
Parts List
GENERAL ELECTRIC CO.
PRICES SUBJECT TO CHANGE WITHOUT NOTICE
REPLACEMENT PARTS
Stock Nr.
Deecriptioa
Liat
Price
RB -000 RB -023 RB -028 RB -027 RB -028 RB -124 RB -200
RC-C-004
RC-034 RC RC-004046 RC-072 RC-091 RC-173 RC -151 Ó RCF-
RG
RG 59
RC -40E RC -415 RC -825 RC -526 RC-066 RC -811 RC -412 RC -4I3 RC-6I4 RC-015 RC -707
64 RC -970
P-002
RÓ1
RK -004 R1.012 RL -013 R1,114 R1,113 R1,21b R1,216 RL-303 RL-406 RN -001 RP -014 RR -014 RR -016 RR -633 RR -0M RR -039 RR -049 RR-054 RR-062 RR-057 RR-068
BOARD -Terminal Board Single -lug Pkg 4 BOARD-Terminal Board under 2nd L P Trans
u BOARD-Antenna Ground Terminal Board
BOARD -Terminal Board Prone WOO beside Band itch
BOARD-Terminal Board on Side Wall Under GPO' BBCCCCCCCRAARAAAAAAPPPPAPPPCAAAAAACAECCCCCCKCIIIIII-EITTTTTTTDTOOOOOOO-iRRRRRRaSRpl-------.......eO0000000e0001v125ce5h55rmm:mo2mmmCdffd,f,ddaffdi2gdlddd..e...2...Be20221389000i04nt600000m100u0006VVVV1SVVV...;(.'A...wPPPP-iPPP0aaataeappa3appbppeepeaerra0reBrrr0(r(CCCa1(C-Cc)-.423k-24.-390e4039t).1))PC-8k4,g7C.) -521, CAPCA-3C2I.TOC-R4-8.)05 mfd. 400 V. Papa (C-14. C-33.
-.l CCCCCCAAAAAAPPPPPPAAAAAACCCCCCIIIIIITTTTTTOOOOOORRRRRR-----.231220008500mmmmmmfdaeimdr.ilNdd.f4d..d40..00MM0MMViiVcc.iiaca.Pna((aCPC(pC-aC-eI4p-Cr-26e2I8)r.(7)G(CC..9--3370))....
CAPACITOR CAPACITOR CAPACITOR CAPACITOR
---1338000mmmmfdf.d.
Mica Mica
C-35 (C-18)
-2850 mmfd. -111 mfd. 480
Mica {C-17) V. wet Electrolytic
(C.
CAPÁI)))iTOR-I6 mid. 390 V. Wet Electrolytic (C-
CAPACiTOR-3 mid. 350 V., 6 mfd. 150 V.' 10 mfd.
25 V.' Dry Electrolytic (4134. C-41. C -43y.
GAPACITOR-16 mfd. 25 CAPACITO(R- O.000ator
V Dry Fodder
Electrolytic (C-42) Capacitor 300-50D
CAPACITOR- Twin Trimmer Cap. Om. Band BOO
-T CAPACIT11, OR win Trimmers R. P. Band BOD
CAPCITOR= Twin Trimmer. Ant. Band BOO (C-1,
CAPACITOR -Ant. R. P. or de.
CAPetCCpIarTi
(G1. C-0, m C -I2) .
B.a.n.d...C
T.r.i.m.m..e.r
i9e,33. O Cod god I. P. Trimmer Cwparitors
CON(CD-E22N,SCE-2R3-,Tohrre4e25GaCn-g2ß)Tuning I0i50 med.
Po-"c22) CORGIB, C-19, Cord
CUSHION-dndemer Mounting Coeburn Pkg. of 3
ESCUTCHEON
POO
wan
Rubber
FOOT Cbgasia Mountiongg Foot Red Rubber
ud KCCCOONOIIOLILLB---AR-A-n.CntPt.ev. tCvrCrouaioiloCKOonniOlolybdOyBrPlaInBd.BoBufOd5OC
(1,1. (L-0,
42, 1,5, L-0) L-14) 8, L.11.
50.10 .10 .10
10 .15 .10 .30 .25 .25 .25 .30
25 .25
.25
.30 .35
.40 .35 .25 .25 .25 .30
1.30
1.10
2.090
.40
.40
BO
.80
.20
.50
4.40 .50 .10 .80 .20 .20 .10 .40 1.25 .]0
Co-r-io P. in
1
Only cea
Bard
(BID Bab (L-1301,14.
417,
1.]5
C01 41-LOscillator Cod Only Band C (1,13.L1ß)
1.66
P. RCCEOOAIILLC--T2IOsnRed-IIu.It.PePn.nTWTrruaagnoetsoleformCrmoueprCliCnoogililR11(.e1- a,M2c1t.o. rL1-2,0212)
NPRRLEEUASSTIIT-SSBETTe-OOcEuRRat-cc-1u5h0t0ec00oh00nmoonNhhummMt. M(otu0nw0wtianat1tgt0t
Plate. Pkg. 2 Carbon (I2--10), Carbon (R-0),
RESISTOR -60,000 ohm 5( watt Carbon (R.21.
PW.5 PW.5 R-11)
4.10 1.35 1.33 .40
.70
.70
RRE66S,I6S7TÓOÁR--5300.00000
ohm M resti earbov (RR -4). ohm 51 watt Caarbon (Á.)1
Pkg.
R-14
.70 .70
.70
1áÓ000 ohm 54 watt Carbon (R-0, R.0).
.70
RESTe1nT01-200,000
M watt
(R-24). .70
RESISTOOR-2
mewl=
M
watt
Carbon
(R-5),
PPk0g0..
S 8
.70
RR -183 RR -308 RR -106 RR -707 Rß-122
Rglú
RS-157 RS15B R6169 RS -I60 RS -200 RS-315 RS -316 RT -084 RT -085 RT -086 RT -217 RT -21B RT -]OS R3'-009 R W-002 RW.101 RW-102 RX-o13
RESISTOR-10.000 ohms IS W. Carbon (R-22). Plia.
REBISTOR-0A8 Grid Lead
12 ohms (R-23)
9ORR I. RBSIS.
TapRpeRdeaiator
Resistor
RESISTOR
-50a0n.d00
R ohm
R 20)Bleeder 1( watt Carbon (R-9),
Pkg.
x..1700
1HHIIBELLDD-A-lintt.I.RP. .
P. or Om. Coil Shield Can
Can
H
I. P. Shield Can
SHIELD-Small Partition Shield for Band Switch.
P SHI
9
Lergs Partition
Shield for
Bud
Stench.
!SHIBLD--shield Plate Near Volume Control
rHIBLnD-Shield Plate Supporting Dry Electrolytic
SOCKET SWITCH SWITCH
---SBBpiugeehdcthCPhCiaahnSgoeoleckSrewt0,i1tPc,h1,
S3.l to3-B:ctrl.) IS7)
.76 2.53
.10
111'212i:1-1iMgt'
Tnnetormer 10.125 V.
SO/BO cycles )T.2)
6.40
TRAN/S/BdPppORMER-Powm Transformer 105.125 V.
TRANSFOFMEPTÚniversal Power Transformer
105/130 200/230 V. 40-00 cycles (T-2)
TTRRAANNSSFPOORRMMERER-2-lnedt I.I.
a TONEP CONTR,O(Á.S
P. P.
Transformer compleb Tansformer complete. hm Tone Cootrrl and
-2 ;VOLUME
WINDOW
-CDOiNalTRWOinLdow
macaw.
(R-12)
2.00 2.50 .95 .80 .16
.45
WASyHtER-Ìkvnlulalirg Wlueer forSlaoontina kBleeteo-
.10
SCREWa),SSBMBLV-Chassis Mounting Screw Ae-
aembly
IO
SPEAKER ASSEMBLY A -B3
1 00-029 BOARD-Spanker Terrain) Burd. P 2.
.10
RC-908 ICONE- in.
and Voile Coi (gukete :ctrl ) 1.35
.Piece
RP -012 PLUG-Pemele Speeker Plug
.20
RP -022 RS -026
SPEAK RCVS o. Tew Orpmducer Complete
8.2.5
RT 409 TRANSFORMER-0utput Transformer (T-1).
1.80
RC-908 RP -012 RP.032 00RT-402509
SPEAKER ASSEMBLY A-85
CONE -11 in. Type Cone and Voice Coil (Gasket ',PPSTPLLREUUAAGNGK-S-MEPFReOam-Rle1eMl1SeEpSìRenpa.-keOTaekyrueptrPepluPublgtupTgeankneer fCorommeprlet(eT-1)
1.15 .26 10.70 1.80
DIAL MECHANISM
RB -117 RC -805 RC -850
'CBCAORBARLDCEK-D-EDTrri-ieDvseuCaColardbLlaePm,kPpgW. Bo.fraW5ckbet
,.g2o5
RC-954 CAP -Seale Cap Assembly (Gear end)
.10
RC -953 RC -958 RD -006 RD -013 RD -020
CCUASPH-SIOcNale-RCoapbb(ePritVe aErnedr) Cushions Pk . DRIVE-Dr.e, Ow Vernier Reduction Drive DIAALL-TDiaDlriSvceaDlarum Aarembly
.10 .10
1.035 .65
RD -024 'DIACLo-nTs ulbeW4 ar Dial Scala and Dries Mechanism 4.0
RP -200 RG -003
-200 RP -003
RP--000341
RS -N)1 RS-403
tete Dial Stele End Fastener Pkg. of 10
GUIDE-DiI Geer
-dal POI
POINTER
-Dial
,PULLEY Drive
er Plé0.. Cord Idler Pulley
5
Pkg.
of
2
P LATE (SPRING S PRING
--DDriaulmMSopSunnptriinnggPPklga.teoAf bglYeemwbitlby
Wubms
.10 .I3
.15 .15
ii6 ..020
RT-802 r000LESToeglaAesmbiy
:25
350VAC
l
/ I
365V -250
.. 1eAisNe TCOIL
6
I0 I0V
I
(
I
63VAC
'/ r r
,
5
( C.»Jr
24373U\\ `eá slkc
I
/
\
c -M
/
\
/
-<
23V 2B0V
`- - -J "--150V --627p3V VAC-
reear Of 114335,1
H
VIEWED FROM UNDERSIDE OF CHASSIS
Fig. 4. Trimmer Locations and Socket Voltages
Pig. 5. 131.1 Mechanism
DIAL MECHANISM ADJUSTMENTS
The dial mechanism is rigidly mounted to the chassis. The tuning condenser is mounted by means of rubber cushions and bushings at points of support. The dial pointer, station selector knob, and tuning condenser drive drum are inter-
sected by m s of the drive cord and drive cable; the frequency band switch, the cylindrical dial scale and switch knob, by gear and toggle assemblies.
t. Recuisit of Dram on Condenser S&P With set screws (19) loosened and tuning condenser plates
fully engaged, place the drum in the position a shown in Fig. so that drum spring (12) is approximately horizontal,
and the top rim of the drum is h in. away from the mounting
plate. Guide (48) should stop at equal distances from each end of the mounting plate slot.
2. Removing and Replacing Scale Pry out fastener (3B), and remove the scale by lowering
that end below the ear and taking the scale out of capassembly (24), holding parts (24), (II), and (7) in place. Replace, locating tabs of caps (24) and (25) in slots of scale. Replace fastener (39).
3. Locating Scale Loosen the two gear set screws (16). Rotate the orale up -
ward until there is slight tension on spring (I1) with the pointer indicating on the Band "D" scale. With the frequency band switch in the Band "D" position, place gear (7) in mesh with the gear on part (6) and tighten the two set screws (16)
4. Rop4siie.g Drier Card The position of the dial scale pointer with respect to the
tuning condenser drum is held fixed by means of a special metal braid cable connecting the drum with the guide (48). Tension is maintained on the cable through the drum spring
(12) and drive cord. To replace either the drive cable or the
drive cord, remove the dial scale for convenient ac 'to
guide (48). Unhook spring (12) (rom tab (46) to release
tension. Unhook the cable or cord from from the pulleys and drum. To replace
guide (48) the cable,
arendthurn.dwintod
agree with Fig. 5 and rehook drum spring (12) as shown.
5. Replacing Redaction Drive To replace the reduction drive, unhook spring (12), loosen-
ing the drive cord. Unscrew palnut (44) and remove drive. Replace with new drive and rehook drive cord.
6. Replacing Toggle Assembly
Loosen the two set screws holding the toggle mechanism
on the band change switch and on shaft (6). Replace with new
sse bly, setting lower lever arm Ts in. away from the con-
denser drive drum as shown in Fig. 5 and tighten set screw on
frequency until there
band switch shaft. is slight tension on
sRprointagte(Islhlawftith(6)theclosccaklwe isine
the Band "D" position. Place upper lever arm in shaft and
tighten set screw.
7. Setting Scale Pointer The scale pointer is soldered to the slider. To set the
pthoeinptelramt.eacrheafnuicllaylleyn, gtaugrend,thaendtusnoilndgercothnedepnosienrterrottoorinsodicthataet
the extreme left-hand line on the Band "D" scale as shown in Fig. 5.
& Replacing Dial Lamp Take hold of terminals of lamp bracket and push up until
lamps protrude above the opening in reflector (18). Lampa may then be replaced in socket clips. After replacing lamps, slide the socket mounting bracket back into the mounting clip.
:; John F. Rider, Publisher
www.americanradiohistory.com
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G. E. PAGE 7-25
MODELS E-91 ,E-95 Schematic
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PAGE 7-26 G. E.
MODELS E-O1,E-95 Chassis Wiring Coil Data
GENERAI ELECI'RIC CO
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G. E. PAGE 7-27
GFENERALI FLFClRIC CO.
IADELS E -31,E-35
Circuit Data
Voltage, Alignment
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PAGE 7-28 G. E.
MODELS E -31,E-95 Visual Alignment Socket, Trimmers Dial Data,Parts
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G. E. PAGE .7-29
GEN ERAr. ELECTRIC CO.
T::ODELS E -101,E-105 E-106
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PAGE 7-30 G. E.
MODELS E-101 ,E-105
E-106
Chassis Wiring
Coil Data
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G. E. PAGE 7-31
SERVICE DATA
Physical Spp o9Icatimes
Model Height Width Depth Weight packed
6-101 30H in.
15. in.
9)S in. 45 lb.
Electrical Specifications
6-106 40 in. 26 tin 1111 in. 721h..
B-106 42 in.
27.
in Iba.
Label
Powº
¡em.)
F(Cenj'clm)y
poo Con@
s)Waita)
116
Ils
105a-d130
200-250
60-60
110
26-60
Ito
40-60
116
s NOTE -Tep on uneven l transforme. (R ling "V") are
acceseible by emu the rip rover on the top of the tean.-
former.
Tamg Frq.ency Range
Band "6"
Band "C
Bona "D"
540-1820 ke. 16806000 ke. 6.0-18.o mt. (6,000-18.000 k1.)
Teeing Control Drive Ratio
Pm. Tuning Verniº Tuning
40.8 to 1 1
Electrical Power O.q.t
Undistorted Manjmum
6.5 wale 14.0 watts
IA.byeeber-Electrsdy.awcc Cone: Model 6-101.... tiah
Model B-106. .12-ivcb
Cone CM'1odLealnBe-1.0..6f..a. t.14200-ùcNycle.
6.ó ohm&
Tab.
R. F. Amplifie .. .6317 Triplegrid Supaaonwl Amplifier
Convert. and 0.<illa.r.... . SA8 Pentagrid Convert.
Pint I. P. Amplifie. 6K7 Triple -grid Super -control Amplifia
Second I. P. Amplis«....61(7 Triple -grid Super -control AmpOS.
Detector AVC sod
APC Bin Supply -6116 Twin Diode
Audio Amplifier... -MI5
Output...
.616
High Gain Triode Begun Power Amplifia
Taro.
CAoPlCoraCmonatrColo.n.t.r.ol.._..OSJCTS
Low Gaie Triode Triple-grid Amplifier
Rectihº...........6M Fell -wave Ratifia
Dial Lamps
.. 6.3 V.-0.15 A. (4 rid and 3 green)
DESCRIPTION OF ELECTRICAL CIRCUIT
Model. B -fol. 6-106 and 6-106 employ ten metal envelope
etubez i operbeterodyne circuit, giving the excdl.t
ngitivity and selectivity inh.Or in this type cirent. The
radio frequency section of this ten -tube chassis ertititez & novel
type of construction known as the "Junior Sentry Bor." This
type constructon permis using .teener, mort connecting
lpfeoaardrbsileerndetd.basanhmdieilnldamebtdhoeoesoeeascdccthiiololnrfaa.ttdowSirooepfa0croer0aqd4atue,,egn5arcoyhu.epcsapirndcrtueeinctoncaaoalsnialnirdtefeoRrtro.ewtehFnde.
"D`"bandrand mmpeat coal for the "B" hand ana "C'
ants band. Operation n the "C" bad is obtained by shorting out
n of the
and R. P. "B" handroil.
& The aged from the antenna as applied to the control grid of
the 0117 R. P. amplifier tube through the antenna coil, the
sº secondary of which is tuned to mol the main tuning
the
incoming signal by the The antenna roil,
for bande "B" and "C"
two primat cuita <
«t* band
for operation on the
such ù tuned to the
"C"
however, band position,
when the the lower
Mel primary coil. L-5,
or out. The high frequency trim-
s adjustment for the"B" band antenna and R. P. stage ù
ompliM* by two adjustable trimmers m
from the
"C" band tap on ash coal to ground. The capacity .upling
coal -1,-3, aria only on the "2 band and it. function as smiler
to th e. of a fixed antenna .t,,r[e trimmer for that band.
The amplü* rade f1h.
1gsl is lob. d upon the
. signal control grid of the 9A8 convener tube through the
R. P. Coil. the secondary of which is tuned the aryl
frequency by the center section of me main tuningsda.º.
Io the flAS tube, the
local aeilla.r signal
incoming gen.
which ie 465 Ise
ú combined with the different an frequency.
The local signal it
by the acilletor elves.. of
Nat tube and the prooppeerr frequency diBºace is maintained
throughout the tuning rase by the front section of me main
s m pegonendea in conjunction with the
apui.a d M
illa coils and
ialata The combination of the agnat frequency with the local
frequency in the 6A8 convene tube product the
lr.o.cy rhea intermediate frequency of 466 kilecy0les. This particular
ermedee
is
d improve Sort -wave perform.
to reduce Unger rapoose
t. The
.age
in.rmeelaate
aeude section
frsuencypo.. ro mpo.ed
amplifia of three
cooties d a I. P. medormm
.d two 667 amplifier tuba. Bo. primary and secondary
a winding.
resent
mplióa
yoBeftK&7thfterueIbq. uPiesn. oceypraeonnf asSo*remonm.t0eal1lr0ebkiaitsluonfcoeTydrhc,eelaleln.aMdawwvaeedrdes.
made 1. P.
th
enable. the 41ond I. P. tuba to deliver maximum power
the 6116 diode
TDe output of the I. P. amplifier ie applied to the MI6 diode
...tie bpply rectifier, which ù a combined wend detector, automatic
volume control, and
tube. The arouary
d
the
fres ques control um third I. P. transformais
apply centº-
1pped
assay ata
providing the push-pull connection te the 6116 diode
og to secure Ne variant. grid btu for me 6(7
automate frequency control tube. This
Io8ic fr.oency
ddee.à. a control feature
an /dlo.ig parr
mph. One diode of the 6116.ù.diode tuF is used. detect
tion.tion . the modulated agnat furnished by the I. P. amplifia. The
audio frequency developed by this action is transferred
the audio frequency .y rem for
and reproduc-
e tion. The
atonetic
D.C. volage remelting f volume eovtrol action and
detection e nad
for the operation
for the
agor6.24, tuning tube. The diode load reactor d.opm,.l4o,
u . R-24, R-31 and R-32 in
saes R-32 is applied
eerie. The au.mati<
D.C. voltage control grid bj40
lo
the
R. P. converter and fins
M thon tubais supplied
1.
by
P. amplifia
retests the
tubes. diode
Initial baga
lad reactor
GENERAL ELF.CyIIRIC CO.
MODELS E-101,E-105 E-106
Circuit Data
Ali gnment,Dial Data Visual Alignment
e..r. to . negative v01í0e supply of appmdmately 3 volta on the
main blleeedder
. bin voltage developed unes R-31 and R-32 is
used control the Color..& Tuning tube. Switch Bi make
tr. it potable to apply Pull or partial voltageto the tube, thereby
Wowingconwl of tee color indication in accordance
pre -
selling receiving sedition. A complete dºcription of Cobr-
ama Tuning u girt in a later p.r..nph.
The audio frequency patient .con R-31 and R-32 b
C d upon the volume control, R-16, thresh aep eil.
The movable arm on the volume control elect+ the
...Mal amount of audio gen.l applied to
[rid of the 6P6
An, t. audio amplióº tuba and thvß regulate the eutpat the
receiver.
the volumecontrol, R-16, la placed network
re... . of capacitors and
The muse.peºh switch is
out, found in this rì
and when clad remove the bat
nmpenmtith, The of the eP6 audio tune i...á.$510
coupled to the arid. of the 61A base poco .rode. The plate
circuit d the 61Aù suitably matched b the yº.mdynamie
loud-Maker by mans of . 4t.-dunce output tranrfo.m«.
The tone control ù found in the plate circuit of the 876
fini audio tube ana conga. of capacitor C-43 in aria with a
w variable retina 1-18
the 6Pá plat resistor R -lye
Cutting out
n R-1 8 lessens the treble mcaoony* of
re the receiver. Between the plate of the 676 Beal audio tube
and the grill of the 61,0 tetrode output tuba found two
capacitors in arias, C-41 and C-42. The mailer ape00r,
.rte C-42, is alerted out by the wave band switch for operation
on the broadcast band. On the two
-w.v bands il ù
,eft in the n
the low frequency reaponee
tend.. and thereby leaen the a
towed mi.000rúc howl.
e Plate and rid roltaga for alll tub are .upped by the
power .apply system employing a 624 full -wave rectifier
t<uabpearwimhircah..,ulpapglieetahrthwe itrheaq..d*iavbloeltnse,twaonrdk
of recsem gad filler. action.
A.ta.tic Peeq.eecy Control
Thee receives employ automatic Iequmey control (AFC)
aril..r which is & device for automatically controlling the lrequm<y iu each . way that, although the reeve is not
. seat meetly tuned she *goal being received, the
inlet.
mediate frequency will still be produced. This control of the
mediator frequency is.curd by mans of the 0(7 APC tube,
connectedea to the oscillator that it da ms lagging current
fro he lank circuit and thus give the effect of a shunt inductance. Variation of the D.C. rid bias on the 6(7 control tube .ill effet the mutual conductance of the tube, thereby
chasing the
of lagging c
t d awn from .he
oscillator tank with mnmquenl effect of variation of the
s fig amount of abort inductance connected `.r the oºillator
coil.
alt the tow inductance in the. oscillator tuned
ont ce and channe. ils ,v
freqency.
del.. Grid bien for the 8J7 c trot be, which will vary in
accordance with the amount of
d the receive, is
obtained from th. OHS diode rectifie operating in conjuction
with its special L P. tandormm. This mewl voltage is the
diffama between the drop across censor R-24, the load
resiztance for one diode section of the OHO diode rectifie,
la and the drop leva. resist 0131 and 11.32. which constitute
the
r egd ce for thhe. other diode section. When the
receiver correctly tun* to the intomang Anna! the inter-
mediate i
produced will be 486 kc. which is the
resonant frequency of the tuned circuit feeding the 008
atm diode rectifie. Under this condition each diode plate receive
equal *gal voltage and the D.C. voltage Mope
the
lad reàstm will be equal. giving no chante in grid blaa on the 817 control tube. If the rereiver is go tuned that the
tºmedem Irauency prod.* is above 465 kc., the signal '. voltage applied diode plate No. 2 will exceed that applied
taocmdieodheapdlaateguNeo.
I. In R-31
this cue, the D.C. voltage drop and R-32 will be laine than trot
ras lad renter R-24 and a resultant volutes will he
produced which will incrare the 0)7 APC tube grid Me,
roaming the mutual m000111nce of the tube and auang
u it lo Maw 1m lagging current Item the oscillator tank.
This is the lame elect would be produced by incasing
the amont of shunt inductance arrose the o.eilàor coil
:o comp... and th. 0.01 Won frequency is thereby lowered by the
necessary
e for e deaatenline The
opp msite
plac
on*
produce an antetm*alts I.,uency below 466 he. Diode plate No. 1 then reams more signal voltage then diode plate No. 2 and the eeulta', voltage develop.t across the lad re*e.nce
it tech as to-decrease the grid bias on the 617 AFC tube. This
causes . lare, curent to be drawn from the acillator tant
v in induewhich effect u the
a decrase in .hunt
...I' i. cr. essequent i
< can oscillator fre-
quency to esse lemme the delusine. n
ALIGNMENT PROCEDURE
open.. The receiver should l be allowed to run for fifteen
minutes in order to reach it, approamae normal
tempaatur.
reeking any adjustments.
to
deteermine he co
of the existing alinement Th ù
may he tatm.11ù110
mpPnlyis a signal to the
4. the a0go0eet ,,.om
receiver endd
"Tuning Wand" into the 'l involved. Me u
from the
nd
contd.. a rod
a .d. . magnetic me.y
of insulating attached to
materiel
having and
e rime melt
of noncore of
.d. finely divided iron compacte into the opposite
By
i. . a e the metal ris ad ipso the center of the R. P.
rcoil, the inductance el this c1í1 is lowered, in
its
resonant frequeency. Inmtin. the Aron -M*
iota the
coil
its inductance, lowering
t frequency
are. If the,
end of
R. F. the times
wenadreinan.
mart the
atignm.
coal will res
,tnn
either
in output. When an .muse of &inner az obtaloin* with the
iron-filled end of the wed, a decrease in resonant fngnency
of Out circuit by incasing its trimmer capacity as .dialed.
When incnaee of aryl ill
with the mmeetal ring,
a decrease in trimmer caperity ù indicated.
Ch asm Indiatd by Wand
Wand Metal Ring
iron Pities
Sina1
DDeecreerasse. tt
Trimmer Adjustment Required
None
Me.l Ris 1,0,..
Inn PBhs. Dmeue
D«rase a p0ty
IMion Pü ris
Inneue }
mena.. apadly
ALIGNMENT FREQUENCIES
I.P. Bad "I" Band "C" Bend "D" Wave Trap
463 kc. 680 ko.
174,00. 16.000 Ira
485 lea
. 1690 kc.
In order to align these receives prup.ly it ie actuary
have available:
I. A modulated tat oscillator the above ditnm.t fequencaa.
apble of
produris
2. An output
voltmeter with .
Iÿnm10,,
m
such as a high teas gale radio. of 3 to
5 velta,
**mat or envlamp indicator.
An
tool cootsang of a fiber Ash screw-
driver.
4. A tuning wand.
To ralùe the full advantage of the performance built into these receiver at the factory, circuit alignment using
cathode ray oacilloecupe equipment ie moth to be preferred. The omdlownplc method is particularly advaetagmne in &lignin the I. F. tuned cire
º The location of all alignmat trimmercapacitors. ea well
at cockº voltages, is mho. in Fig. 3.
/ 1. Vue! Alignment 1. F
For viand alignment it is mama, lo vary the frequency
.th ni, of an unmodelated lest oscillator signal over. range extend..
on
sides of the peak frequency.
variation
take
.0. m, plate in synchronism with the ho41.0,1 l t
no«f the
cathode ay ham o
md 01x0 The frequency
nr ulat0ed,
treed., provide tmm eans for synchronizing the ,iodic
ut t
v
with the cathode my ho,mntal
defection rúctt. The eat oscillator may ed...sanely have
facilities for audio frequency amplitude modulation of a
fixed radio frequency tat sinner, m well as for frequ.0y
modulation, but audio modulation tie not required for visual
e.t.a I. P. alignment.
Instead of an output mets across the
voire coil,
the vertical plues er the cathode ray tide are coon.* aerou
the lad .10íp. d the diode ratifier. With the frequency
canna modulator,00.07 in operation in e.junction with the test oscillator,
the
curved the circuit under tat will be then
shown on the zee..
.Set the tuning dù1 indicator.rthe low end of the bradant
band aim< point when no anal a received tince an
signal might intºfm with the aligning Poses
. The volume soled should he in an "off;' or nearly "off"
position. Apply & frequency modulated airy, the grid
d the tat I. F. amplifier tube
a
l (RC -072)
capacitor leaving the .rid cap in place. Connect the vertical
plait of the oscilloscope betwaa ground and the junction
point between R-54 and R-31, which re the diode lad
. "b. ana with the AFC .witch in the
position
proceed align the primary and aecundary of the 2nd I. P.
and the AFC I. P. transform..
The ohi0t should bee mete the two curves coincide with
ash other at the top and throsheuu their length with the
«eras amplitude oblaieble. This will requin that W
fours I. P. trimmers be adjusted in the tuner manner
Me AFC weeder, (kse.e.d a/jestd for ea.,10 amplitude
nerf
Moe
1themcaraNeick
men
M
properly. Pig. 4 givra the appearance of the curve when the
*jet alì.nment
beenn completed gatidatror hy
ts'le t, he
Apply the lame frequency modulatedinput to he
grid of the converter (BAN tube through a .o5 --odd. capacitor
ape as More. Adjust
andormer until
the the
cpurirmvearycoianncdidseecuonMdaroynofantdhehIaSveI.thPe.
A ffuurtrheetrofadPjiga.tm4.enl of the AFC secondary rhem[.al
ut) trimmer is necessary in order to senora. the I. P.
Unnhe alignment atùf
. Apply them
geai to the grid
of the second I. P. amplifier tube. m*e ground end of
G31 and connect the vertacxi de8mtis plate of the oseillo-
p Since
between ground and the 8118
the eth*e prong is 1cca.ible
athde pron.
this connection
No.
an
8. be
made at the APC switch contact marked "Point K" on the
per. layout. Pig. 2. Carefully adjust the AFC secondary trimmer until a ens.
is obtained which as similar to that shown in Pig. I. Correct
adjustment is made when the two sides of the curve
symmetrical and inlmat exactly at the ads. No adjuervent
el the other 1. P. trimmer mould be made at this time.
'twill probably be found that then .s0 be two settings d ton
aciWtor trimmer that *8 give ast output response. The
i.º capacity matin[ of tie trimmer Is the one that should
bare be med. To
that correct adjuelmmt hm been obtained,
a for the image agas at 17.07 me. with the Teat O.dllalm
eett 18.0 sec. It may ben
Y to increase the amt
omilla.or output le obtain repose at thù point.
Rerun the receiver to 18.0 me.. and adjust Band "D"
antenna and R. P. tri men. respectively IC -3 and C-10)
cond.. tes maximum output indication. When adjusting the R. P.
trimmer. C-10, rock the tuning
back and forth
through rocnarice as :n the 660 kc. pndis apatite
adjuament
4. I. F. Alignment with Ore/ st Meter
. Although the nee of the cathode-ray osrallsraph for
alinement purpose ù lo be prelened, it is possible make
the 1. P. adjust... with rmmn.ble 50010/00 tang a 486
rec. mg,J generator and output meter.
Place a medulald annal of 465 kc on the [rid of the last
rate. I. P. 161171 tube with the volume
sod at maximum
.d b. the APC stitch tuned o0. Place & range A.C. volt
ote.r or other output indicate. .rom the voice coil of the
« loud'spaker. Adjal the
that an radiation M
omuotpreut.aofannthtewotinonred three
voila
is
obtained on the output meter.
/r Adjust and radial the primary trimmer for maximum
output and Ile mme4ry Neiltieen l005. This latta
adjustment *II ba very broad. Apply the s.nel input to the
grid of the let I. P. (6117) tube and adjust both primary and
secondary trimmer for maximum output. rducn& the input
egg
indci ationnm
obtain approximately the
before. Apply the an al input to
ßenoutput
Me
or ern
converter (6A8) tube and .dine both primary and secondary
trimmers for maximum output indication in the game manner
as before.
It is now neceuary to make s fine 410,110 11 of Ile
secondary trimmer of the last I. P. (AFC) transformer.
which is as bollos.: Without changing the frequency of 1he
signal generator. place the input lead. the rubber insulation
of the connes. (6AS) grid lead. This *11 provide & .mail
tmheaalttin.aputot trhrBouegtthisthife
rapacity neceseary
between the ted& ta make the output
incase
audible.
mdel.., If the signal generator is provided with . mans of removing
the
this Mould be done. However. the adjust.zomt
may be terril out mtid.cto.ily even with. modulated
.heat gm tiled. Noww tune y or
aigre in the usual manner 465
e
gy
kk saingnnal [
earl bat between this card. and the 465
tor. It may be n
to
a abort
entirely ilthe
0 a d.o
Thew the APC on and bat. the Wt I. P. arondey (APFC)
..becte Bat This .When is nay critical .d must .made .1 [cal can. When the adjustment e
il properly AF that be ro appreciable chape from stn
bet Me APC mheat.cPhis throe and ose. This compete
Me he amenten the I. P. and AFC aodt
i The alignment of the manner. and R. h, esta may be
earned oui the u.ual manner. Heave, the APCa.ir<It .net remain .o the off patin.
. 2, L F. Wave Trap Alignment Set the band .watch to Band "6" and tes. recaser
about 100041.
With the teat oweillamr *till est at 465 kc. apply 1hù
. an.e. canal the
terminal through a dummy antenna
26, *mistime of a 400-ohm a330a-.n.d.330-...re capacitor in
the. thee.... teriez. With
ke ago.l applied to
tenoimel,
al., alines the I. P. Wan Trap Trimmer for
output
indication.
1.0 Pig. 4. Daryl I.
3. R. F. Alignment
Pint check the position of the Mal pointer by rotating
the tanins condensera
capacity poè , tie.,
plates fully meshed. Al thiseposition. he pointer should
dn. . ricade with the end mark at the left-hand end of the wale.
If r it
doe not, it mal end ro.ti0 the
he
&et
by leoaenis Me dù1 on the tuning nden
drvm est er &hail.
Holdthe tuning condenser rotor while ding this.. Prame
rotating.ite Tigh.n the two set are.* after the pointa is
sorrectlY el. During R. P. alignment the APC swatch mat
be set in its "OT' Rounterclockeile) position.
Pot S. APC Ad]emmas Goa
Bad "B" (340.1680 Kt.)
. Set the tea mediator fee operation at 1600 kc. and connect
output the amena temfal of the receiver thresh
the dummy antenna described under, 1. P. Wale Tap Alignt. Tune the receiver und the pointer is at 1600 ou the
a sale. Set the tone control for minimum high repo and
reduce the volume co tel setting es
void
ezola
m. Aradljuesrttithe.1Be(Cd-I2"B, C"-7o,eaánUdatCer-2, ,RP.igF..3, )antodgaivne-
maximum dilection on the output meter. Maintain the 14a oscillate output at the lowest level which will gave an ea*,
asiles reedahie output indication.
Now est the ter
at 680 he. and tune the receiver
to resonace with this annal. Adjust the 660 kc. padit
ape., rocking the toning conaen back and for
a throughh resonance the padding capacitor ù adj.M and
note the deflection of the tunaa meter bled time the receiver is und thrash resonance. Lave the padding capacitor at
the getting which gives greatest dilection.
Retune the receiver to 1600 he. and et the tat oscillator
for
' the
tBhiasndfreq"uBenccaiy,.laCthoerc,k
the alignment by again djo. R. P. and m.m na trimm er
Im for
nais maximum defection on the
melt
Bred "C' (16e0.6000 Kt.)
No trimmers are provided for alignment of the R. P. and
modormen an Band "C" d thee receives. Correct
*jug. tracking between R.
by the .coon of the
P. and antenna tan...mes is
capacity loll, f.-8, and between
°ogbtaailnaesd
aod the other tuned circuit+ by ma.,of the
s.
oscillator trimmer. C-04, sod the fis* pddes capacitor,
. ea.. Tua the band ..itch Band 7C." Set the test
at 5220 kc., and tune the receive to resonance at the fee-
eney. Adjer the Bend "C" o.tillata trimmer, C14, for
output indication on the tuning meter, rosis
the tes
send... back and forth
while making this edjuatment.
Bad 11D" (6.0.1610 Mc.)
Turn the band switch to Band "D." Set the tat esecile.r let 18,100 he. 118.0 me.) and time the ecavº until the
point« coincide with the 16.0 meek. Adjust the Band "D" oscillator trimmer, C15. to rive =relearn output indication.
. ADJUSTMENT OP DIAL MECHANISM
The dial mechanism (Pig. 01 is rigidly mounted the
obsaù by mane of two brechet+ and four elf -tapping screen.
The did pointe as operated by seam of an automatic
tit. easier"
and co
reduction ected
drive unit, mound Res rotor by
on the gang
a Mof a
tci o-nbdaenrse.r..
an. Motion impelled to the gent condenser rotor is trans.
.mined the
through a series of
dial pain. *der
pwuhlilcehysaet ndsupanpoirntetºdcoouoraeMtiogacbaobvlee
the dol tale.
as l . To Meant Etc tcheen
Care Mould be taken lee a .41.gmud aree drive
proper
eaten the .0000et in the escutcheon plaa
t e.u.ben Holes have been tinged an the cabinet (rout panel tit Munro
the proper location of the
wash respect the
sale housing.
To Replace Poem, and Orion Cable
Remove the defective puanta or drive able to be replaced.
ris Rotate the drive wheel (14) counterclockwise until the
pet. coudesº Weis en
are full, open. Place the end eyelet in dot IA]. Thee. the able
uof the cable Mown ù
. Fin. 4, making certain that the able pasta rear the pin Ili]
and runs eking the cens groove, the looped end hooking
owr'h«etth(eSrteonnnotohe
(16). Chah muden.« .haft to
the position 11
make nee that
the drive
the able
s coming of the right-hand idler pulley Sm up lei. th, in the drive pulley. Ale, the roodenar plates
become fully combed. the drive .heel (14) Mould jas met
-h.. the bushing ID] of
drive wheel in the
the relation
patin, pea
drive unit (3e). With the pointer on the rail
the IR)
and, with the tip of the ¡minter (11) on the extreme leis
d'on gale divioo, crimp the polosº tab on the drive able.
ray. To Insert "Personalise, Snip" The "Penoalù. Strip" deigned.
use
in ms
marked E-10. To install the strip, remove the hold« bone
i R.I.a its mantis clip. and did. the paper dip and metallic
faze out of the celluloid cover.
the paper.dap
with a "Femoalùº Strip" Stable for the locality the receiver will be op«atd and reaaembie. Care
mwhoicth.
be taken to &void watching the back of the "PºsonWss
Strip" .hm sliding the etrtp and mealhe fente bath into
he celluloid cover.
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-32 G. E.
,':0DELS E-101,E-105 E-106
GENERAL ELECTRIC CO.
Socket, Trimmer s
Voltage,Parts List
Colorama Tuning
REPLACEMENT PARTS
Stock No.
Description
List Price
Stock No.
Description
List Price
CHASSIS ASSEMBLY
RB -008 BOARD -Terminal Board Double-lug
10.10
RB -009 BOARD -Terminal Board Single -lug
.15
R9-026 BOARD -Antenna Ground Terminal Board .10
RB -045 BOARD -Terminal Board Four lug.
.15
RB -139 BRACKET -Gang Condenser Mounting
Brackets
.I5
RC -024 CAPACITOR-.005 Mid., 200 V. Paper (C-
-01 42)
.25
RC -034
CAPACITOR 36, C-43 C-48).
Mfd.,
...
200
V.
Pap.e..r
(C-
.
.25
RC -038 CPPACITOR 008 Mid.,200 V. Paper (C-
RR -330 RR -331 RR -719 RS -138
RRSS--210309 RS-204
RS -324
RS -325
RE28)(PSISTOkgRofR- 15 ohm , 2 Watt Flexible (R -
RE30S)IS(TPkOgR. o-fI55S))...o...h.m.... I Watt Flexible (0-
.85
.75
-let RESISTOR
m Tapped
Resistor (R-5, 21, 2 25. 20).
B.l.e.e.der 1 .
SHIELD
rad 2nd I. F. Coil Shield Can.. .2010
SHIELD-3rd I. P. Coil Shield Can...
-8 SOCKET Pin Tube Socket (Pkg. of 51 -5 SOCKET Pin Tube Socket (Pkg. of 5).
.20 .73 .7e.
SWITCH-Band Change Swi[rh (0-1, 6.2.
S-3)
2.75
SW1IT0CH.4C)I .ra.ma..ti ..i.ts' .S ..h .0
RC -042
RC -048
CCAA43PP45.)AA.C.CC.-I3ITT8O)O.RR...-. .0...0..21....
Mid., 1000 V.
.. .. .. .. .. ..
Mid., .. ..
.2.0.0.. V.
Paper .. .. Paper
(C(C-
.30 .25
RC -072 CAPACITOR -.O5 Mid.. 200 V. Paper (C.4.
C-11, C-19, C-22, C.28, C.33. C-56, C-80) .25
RC -091 CAPACITOR -.05 Mfd., 400 V. Paper (C-
-.l 25, C-41, C-62)..
...
.30
RC -123
RC -162
CAPACITOR CAPACITOR
-.25MMfdi.d, .4. 0400V0.
Pap (C-17) V. Paper (C-
.35
RC -1M
RC -200
RRCC
-201 -205
RC -210
-S-1 N, C-49).
CAPACITOR
-.5
52) .
... ..
..
Mid., .. ..
..1.00
V. ..
Paper ..
(C-
CAPACITOR Mid.. 100 V. Paper (C -3I)
CAPACITOR CAPACITOR
-20mmamdf.d..,MMiciaca(C(C-S-96)).....
.
CAPACITOR -51 mtr08.. Mica (C-21)
.40
.45 .00 .36 .35 .25
RC -235 RC-242
CAPACITOR 36. C-58)
CAPACITOR
-1.0..0. -I51
mead., mmfd.,
Mica (C-32, Mica (C-37)..
C-
.
.25 .25
RC -291 CAPACITOR -400 mmfd.. Mica (C.40). . .30
RC -344 CAPACITOR -1300 maid., Mica (C -M) .35
RC349 CAPACITOR -2000 amid., Mica C-81)
.40
RC-360 RC-414
RC-423
CCCAAAtrPPPolAAAyCCCticIIITTTOOO(CRRR-4---8213)860. 5..0MM..afiddm....,.i.d31..08,.00.MVVic....aW.. Cee.t.t-.1EE6)lleecc--
.50 1.25
trolytic (C-18).....
.90
RC-424 CAPACITOR-80 Mid., 200 V. Wet Elec.
RC-425 CAtrPoAlyCtiIcTO(CR-2-03)0 Mid., 300 V. Wet Elec- 1.10
-4 trolytic (C-47)
1.25
RC -561 CAPACITOR Mfd.. 350 V.; 10 Mid..
25 V.; 10 Mid., 25 V. Dry Electrolytic
(C-53, C-65, C-57) . . .. .. .. .. .. ..
1.75
RC-620 CAPACITOR-Twin Trimmers, Antenna &
R. P., Banda B & D (C-2, C-3) (C-7, C-10) .40
RC -821 CAPACITOR -Triple Trimmers; Oscillator
Bands B. C & D (C-12, C-14, C-15)
.00
RC -822 CAPACITOR -Oscillator Padden Capacitor
350-550 mndd. (C-131.
.40
RC -711 CONDENSER -Gang Tuning Condermess
(CW-8i.thCou-t9)tr.i.m..m..e..rs.
inc.l.ud.i.n.g
dri(e)
.
(C-5,
a75
RC -755 CAPACITOR -Line Capacitor IC -50. C-51)
RS -328
SWITCH A t Switch (S-7).
m..a..tis
Frequency
Control
50
RS -423 SPRING -Knob Spring. "Push-on" type
(Pkg. of 1111...
.25
RT -089 TRANSFORMER -Universal Power Trans-
former 105/130 200/250
(T-21..... ..
V. 40/50 Cycles
... ...... 10.25
RT -091
TRVA. 5N0S/6F0OCRyMcEleRe-(PTo-2w)e..r..T..ra.n..sformer
115
...
16.95
RT -082 RT -226 RT -226
TTTRRRV(AAAC. o2NNNm5SSS/p0FFFl0OOOetCeRRR)yMMMc(LlEEEes-RRRI(8---T,P21-IonSs2)wtd)).eC.II..r...2.TF3Fr.,.a2nTT4srfn)ao.d.nromsfroen.rr..mm..1..1e..6.r
10.96 2.10
RT -227
TR(ACoNmSpFlOetRe)M(LE-R20-,231r)d(C1-. 2P6..
271... Transformer
2.10
RT -710
TO(NCoEmpCleOteN) (TLR-2O2L, 2-3T,1o8n) ,(0-2C9o,n3tr0o).l
4.15 and
SpeechClan4er Switch (R-18, S-S)
1100
RV -015 VOLUME - CONTROL-Volume Conto
d Power Switch (R-15, S-e).
1.25
RW-007 WINDOW-"Perwiulisn Strip" Window
(Celluloid).......
.10
RW-008 WINDOW -Escutcheon Window.. .
.50
RW-401 WAVE TRAP-Wave Trap Coil Asaembly
8 IN. SPEAKER ASSEMBLY E-101
-8 RC-909 -8 RC-990
CONE -in. Type Cone and Voice Coil
(Gasket Included) (L-25) CLAMP -in. Cone Spider
Clamp
and
1.15
RP -012
RP-044
Screw ...................
PLUG PLUG
-Female Speaker Plug. -Male Speaker Plug....
...... .. .. .. ... ..
.0S .20 .20
RP-052 PLUG -Female Speaker Plug (Late Prod.). . .20
-8 RP-053 PLUG-Male Speaker Plug (Late Prod.)
.2o
RS -034 SPEAKER -in. Type Speaker (Complete
with Output Transformer) (L-24, 26. 26,
T-1)
8.00
RS-418 SPRING-Voice Coil Leads Spring (Pkg. of
.10
RT -415 T RANSPORMER-Output Transformer 1.75
01-.01 Mfd., 250 V. A.C. Paper.
.40
RC -818 CABLE -Speaker Cable (Complete).
.50
12 IN. SPEAKER ASSEMBLY
RC -BOO RC -992
CCOUCRSuHDshI-OiPoNnow-(PGekragn.Cogfor3d)C..onde.n.s.er
Mounting
.65 .10
E-105, E-106
RC -910 CONE-12 -in. Type Cone and Voice Coil
RE -012
ESCUTCHEON -Escutcheon Mtg. Sews.)
Plate
(with
... 1.25
RP -012 FOOT-Chassis Mourning Foot.
.20
-12 (Gasket Included) (L-25).
1,45
Screw.. RC -991 CLAMP
-in. Cone Spider Clamp and
..
... .. ...
..
.
.05
RG -001
RG -102
RRKG
-103 -004
RL.017
RL-018 RL -123 ßY124
GRID CAP--Control Grid Clip (Pkg. of 5) .10
GASKET-Escutcheon Rubber Gasket
.20
GASKET -Escutcheon Felt Guket
10.10
KNOB-Control Knob (Push-on) (Pkg, of 5 A0
CCCCOOOOLIIII-LLLL4,----AARRL-nn5..tt)Pee.F.nn...nnCCaa.oo.iillCC,,.oo.BBid.laa.,,nnBBdda.aBDn.n.dd&(.LBD.C-.1&.(0(LL,C--8L8,(,-LIlL-,2l7)-;.9). .L)...-...3....
1.15 .75
1.10 .75
RP -012
RP -04f RP-062 RP-053 RS-036
RS -116
PLUG -Female Speaker Plug.
10.20
PLUG Male Speaker Plug
PLUG -Female Speaker Plug (Late Prod.) .20
PSPLEUAGK-MERa-l1e 2Sp-iena.kTeryPpienSgp(eLakateer
Prod.)... (Complete
.2o
61e Output Tnnaformer) (L-24, 26, 26.
-V T-1)..e...i.
.
10.51
SP
Leads Sprinn g (Pkg. of
.oice
.10
8$
RL -226 COIL -Oscillator Coil, Band C(L-14, L-15). RL -227 COIL -Oscillator Coil. Band D (L-16, L-17 RL -228 COIL-Oscillator Coil,Band B (L-12, L-13).
.85 .8 85
RT-415 TRANSFORMER-Output
IT-I)
Transformer 1.75
RL -310 RERAoCtoTrO, R60-"CCyoylcoluraImL -a27T.uLn-2in8g)" Saturable 3.00
DIAL MECHANISM
(9
RL -31l REACTOR-"Colonme Tuning' Saturable
Reactor, 25/80 Cycles L-27, L-28). -
3.00
RQ-043
RESISTOR -220 12) (Doi. of s)..
o. .h.m..,..X.
W..a..tt..C.a.r.b.o.n.
(R.
.
.60
.............. RQ-051 RESISTOR-470 ohm, yj Watt Carbon (R-
RQp-059 RE7)SI(SPTkOg.Rof-15)000 ohm, K Watt Carbon 00
(RR-014) (R-18) (Pkg. of 6)
70
RQ-067 RESISTOR -2200 ohm, 54- Watt Carbon
(R-4. R-8, R-27) (Pkg. of 5).
RQ-069 RESISTOR -2700 ohm. H Watt Carbon 1
(R-35) (Pkg. of 5)...
.00
RQ-075 RESISTOR -47110 ohm, 14 Watt Carbon
(R-6, R-36) (Pkg. of S)
.0))
RQ-081
RESISTOR-8201 ohm, (R-38) (Pkg. of S)... ..
Y
Watt ...
Carbon
.80
RQ-083 (010.021)
RE(RS.I1S4T) O(PRk-g1.0o,f0510)..o..h.m. ,
(4 W.a.t.t Carbon
.00
RQ.097 RESISTOR -39,000 ohm, 14 Watt Carbon
((R13)(Pkg. of 5)...
.60
RQ-099 .RESIS1 OR -47,00 ohm, )4 Watt Carbon
R (R-3, R.23) (Pkg. of 51..
.0)1
Q-107 RESISTOR -100,000 ohm, 144 Watt Carbon
(RR -050) (R-1, 0-2, R-17, R-19. R.37) (Pkg.of 5)
.70
RQ-115 RESISTOR -220.000 ohm, 14 Watt Carbon
(R-20, R-31) (Pkg. of S)...
.70
RQ-117 RQ.123
RREE(SSRII3SS2TT)OO(RRPk--g34.37o00f.,00500)00..oo..hh.mm..,,.
14
ti
Watt Carbon Watt Carbon
.70
RB -138
BRACKET -Bond Switch Operating Shaft Becket (35)....
i0 ó
i RB -137
BRACKET -Dial
Support Brocket
1M2as4k )a.n.d..R.e.f.l.e.c.to.r...B.o.x
.20
RB -140 RB -612
BBORBXAra-CcDkHeùtE((TLMe-nnasscLLkaaammndppsRa)me(f2lae0"c1to..r.D.Bi.ao.l.a
L.a.m..p. (º).... .
1.10 g
RC -817 RC -818
CABLE CABLE
-Drive -Band
Cable (Pkg. of 6) (10) Change Cable (Pkg. of
5)
(12)
.40
RC -993 CUSHION-Rubber Buffer Cushion (Dial)
(Pkg. of2
.10
RC -9M CAP -Scale Cap (Pm End) (37).. .
.10
RC -995 CAP -Scale Cap (Pulley End) (38). .. . .10
RD -036 DRIVE-Toning Condenser Reduction
Drive (39)...
1.10
RD -037 RP -800 RG -008
DIAL -"Slide-Rule" Dial Scale (e) GFERAARM-BEa-"nPdeSrwwintclhiaDerriSveteGpeaFr r(a4m0)e..
.
.
.
.65 .10 .15
RG -007 GEAR-Band Switch and Dial Operating
-f (43).. Gear (41)
RL -908 LAMP (Pkg.0010)
.20
Tuning' Green Lamp
1.10
RL -909 LAMP-"10)(42ma Tuning" Red Lamp
1.50
R P-047 POINTER -Dial Pointer (Pkg. of 5) (11). . .25
RP-M8 PULLEYGang Drive Pulley (14)...
.35
RP -049 RS -417 RS -418
PSUPRLILNEGY--DDirdiveScCaloerdspIrdilnegr
Pulley (7)
(4)
SPRING-Gang Drive Pulley Spring (18)
.16 .05 06
z
$
0.
R0-137 RESISTOR -1.8 Meg M Watt Carbon
(R-33 034) (Pkg of 5)
.70
R0-275 RESISTOR-4700 ohm, )p Watt Carbon
RS -807 RS -907
SUPPORT Did Scale SHAFT -Band Switch
Spring
8 vex
Support (81 Gear Shalt
(30)....
...
.
..
..
.
.
.10 16
F
1 d
á
(R-28) (Pkg. of 5).
,0
RQ-485 RE(RSI-ISOT)O(RPk-g1.2o,f(15))...o.h..m. , 1...Watt Carton 75
Colorawa Timing
Thew receivers are equipped with Color Tuning, novel method which indicates the approach to resonance by means of a change in the color of the light illuminating the tuning sale.
The colored light in produced by group of four red-stained
pilot bulb and a group of three green-stained bulbs behind the sale. At zero signal strength the red group in at full brilliance and the green invisibly dim. An the signal increaser from zero. the red get§ dImmer the green brighter over broad range until at extreme signal strength the green is fully bright and the red below visibility through the dial. Hence, as a station is tuned in the color changes smoothly, and the maximum change in the green direction is an indica-
tion of resonence. Weak stations will produce a small color change and strong
etationn larger change. The difference in signal strength between the weakest, and the strongest station likely to be
PRIM SUBJECT TO CHANCE
WITHOUT NOT ICE
listened to, has been found to be no great in different localiitis
that the receivers have been equipped with a two -position sensitivity r nge switch for "sensitive" and "Moen hive'
settings of the color tuning. The switch is located on the
chassis nom the power transformer and may be reached from
the rom of the cabinet. In the sensitive position, the weakest
station general
to which the user can moite level, will shift
listen comfortably above the the color to neutral white at
reaonnce. Stronger glatira. give resonant points at bright
u greens. In localities near relatively large group of high-
powered Butions and having high noise level. such
Chicago and New York, the range switch most be thrown to
the insensitive position when standard out -door antennas are
used, or else the color will be fixed green over so wide a
n band that resonance cannot be accurately found. The differ-
encein ssitivity k about twenty to one. On short-wave banda
the band switch connects the color tuning to the sensitive
netting and the switch on the chassis is inoperative. This is
because practically all the short-wave signals are relatively
<
m
weak. The insnnstive setting is used only on the 540. 680
kc. band. Then ù a group of four red and a group of three green plot
bulbs behind the scale. Them are controlled by a Saturable Rector, L-57 and L-28, in a circuit which is shown in he
schematic diagram, Fig. 1. The saturable reactor is control ed
by D.C. coil which decrease its reactance smoothly fr m
a high value at no D.C. to very low value at maxim
D.C. The saturable rotor acts very much like a dimming
rbestat except that it is controlled by the D.C. plate current of a 6C5 tube used solely for that purpose. Thin tube receive. for its bin poRlon of the AVC voltage of the set w that at no signal the bias is nearly zero. At this point. the pl to
Trent in at maximum; therefore, the red is brightest and he
green invisibly dim. Some thiegs which may affect Ike operation of color fen es
art
OSrcan
bulbs are used to give good dioun of
color over the scale; but if one of the seven fails it unbalance
©John F. Rider, Publisher
www.americanradiohistory.com
GENERAL ELEC'T'RIC CO
G. E. PAGE 7-33
MODEL A-125 Schematic
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PAGE 7-34 G. E.
GF.IVERAL ELF.C'l'RIC CO.
John F. Rider, Publisher
www.americanradiohistory.com
GENERAI. ELECTRIC CO.
G. E. PAGE 7-35
MODEL A-125
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www.americanradiohistory.com
PAGE 7-36 G. E.
MODEL A-125 Socket, Trimmers Voltage Dial Mechanism
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G. E. I'AGE 7-37
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-38 G. E.
MODEL A-125
Alignment,Part 2 "Sentry Box" Coil Locations
(John F. Rider, Publisher
www.americanradiohistory.com
G. E. PAGE 7-39
MODEL A-125
GENERAI ELEC" FRIC CO.
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PAGE 7-40 G. E.
/M EL A-12 5
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GENERAL I+.LEC'l'RIC CO.
G. E. PAGE 7-41
MODEL 9500A
Antenna System
Data,Installation
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-42 G. E.
MODEL 0500A
Installation Notes
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PAGE 7-2 GRUNOW
MODELS 460,461,460X,461X'
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PAGE 7-4 GRUNOW
MODELS 580,581
Chassis SG,RevisedGE\TERAL Socket,Trinaners
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GRUNOW PAGE 7-5
MODELS 580,581 Chassis 5G,Revised
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PAGE 7-6 GRUNOW
MODELS 620,621 Chassis 61 Socket,Trinuners Chassis
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GRITNOW PAGE 7-7
MODELS 620,621
Gh.vF..RAI, HOUSEHOLD LT'l'ILI'l'II':S CO.
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PAGE 7-8 GRUNOW
MODELS 620,621
Chassis 611B
GENERAL HOUSEHOLD UTILITIES CO.
Alignment ,Parts
PARTS AND PRICE LIST
MODEL 620-621 CHASSIS 6H5
PRICES SUBJECT TO CHANGE WITHOUT NOTICE
Part No.
Description
No. Used Price
Port No.
Description
No. Used Price
20962 Grid Cap
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1.35
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3
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1.10
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.10
33779 Tube Shield Body
.60
33802 Coble, Speaker
.25
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.20
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.50
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2
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1.35
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.10
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.25
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GRUNOW PAGE 7-9
MODELS 640,641 Chassis 6J,Revised Schematic,Voltage
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MODELS 640,641
Chassis 6J,Revised(7ENERAI. Socket,Trin ers
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GRUNOW PAGE 7-H MODELS 650,651
GENERAL HOUSEHOLD UTILITIES COS6hchasesrrisati6cA,V,Roletvaigseed
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-12 GRUNOW
MODELS 650,651
Chassis 6A,Revised
GENERAL.
HOUSEHOLD
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GENERAL I1()I'SN.I1()Lll IT'l'II.I'l'IES co.
GRUNOW PAGE 7-13
MODELS 660,661,662 Chassis 6C,Revised Schematic,Voltage Resistance,Notes
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PAGE 7-14 GRUNOW
MODELS 660,661,662 Chassis 6C,Revised Socket,Trinners Chassis
GENERAL HOUSEHOLD UTILITIES CO.
NO.4 TYPE 75 TUBE
2ND DE T. A N.C. AUDIO
NOTE: ON EARLY PRODUCTION,
A-5 TRIMMER WAS AT THIS POSITION.
©John F. Rider, Publisher
www.americanradiohistory.com
GENERAL HOUSEHOLD UTILITIES CO.
GRUNOW PAGE 745
MODELS 680,681 Chassis 6G,Revised
Sc hen atic ,Vol tage
}
311NM ON VU 0113A NOVlB
Z U
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3 John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-16 GRUNOW
! ODELS 680,681
Chassis 6G,Revised GENERAL
Socket,Trinaners
HOUSEHOLD
UTILITIES
Chassis,Alignraent
CO.Parts List
sryg,8óerle.ssar4esTe'Sry:ryeS=e'St3$asigefigQ4 Rg'.8;eeess
z
®John F. Rider, Publisher
www.americanradiohistory.com
GRUNOW PAGE 7-17
GENERAL HOUSEHOLD UTILITIES CO. MODELS 720,721 Chassis 7DB Schematic,Ilotes
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-18 GRUNOW
MODELS 720,721 Chassis 7DB Socket, Trimmers Chassis
GENERAL HOUSEHOLD UTILITIES CO.
TYPE 30 TUBE
2ND. GET. & A.V.C.
TYPE 34 TUBE
I.F.
TYPE 6-1 TUBE
REGULATOR
33778
33929
JUMPER TO BE CONNECTED ONLY WHEN 2 V. STORAGE BATTERY IS USED.
33555
31073
TYPE 19 TUBE POWER OUTPUT
33802
33778 31079
31075
33555-
31079 33730
(
30043
OSC.
TYPE 30 TUBE
AUDIO DRIVER
LTYPE 32 TUBE
A. F. AMP.
DD-\.
30053
/I 29521
2- REO
00
0173
32460 -MODEL 720
33070 -MODEL 721
29396
gailia411---63011
2 -REO.
4 -REO.
34449 A
31775
"-28636
[P VIEW
FIG. 1
RANGE SW. KNOB 32481- MODEL 720 33071- MODEL 721
31714
30172
29485
Je-29.76
23853 73372
30143 30092 23849
33065 1 2 853 1 2.074
24 251
32693
31726
t TYPE 106
TUBE I
IST. DET. OSC.
33732 33943
63014 2- REQ.
31714 1710
34461
33296-1m
23853 29135 29135
o OI
O
0 On..
29083
* o OI
32099 33776
10
10 SHUNT
\
E -33880
E--33742 el-2-29900111I
34435 32693
33297 23842
John F. Rider, Publisher
33262
33301
29567
34383
33775
[BOTTOM VIEW)
FIG. 2
31861 30.98
CHASSIS 7DB OCT. 1935
RAS 10C
www.americanradiohistory.com
Gilt NOW PAGE 7-19 MODELS 720,721
GENERAL HOUSEHOLD UTILITIES CO. Chassis 7DB
Alignment,Parts
PARTS AND PRICE LIST
Part No.
Description
20962 23538 23849 23852 23853 24251 27831 28638 29011 29074 29083 29135 29209 29396 29476 29485 29521 29522 29524 29551 29552 29553 29554 29567 29612 29893 30053 30054 30092 30099 30143 30172 30173 30182 30198 31075 31079 31193 31360 31710
Grid Cap Resistor 200M Ohm 1/4 Watt Resistor 500M Ohm 1/4 Watt Resistor 10M Ohm y4 Wott Resistor 50M Ohm 1/4 Watt Condenser 100 MMF (Mica) Socket, Pilot Light Assem. Screw, Dial Pointer Resistor, 40M Ohm I Wott Condenser, 100-250 MMF (Mica) (Dual) Condenser, 50 MMF (Mica) Condenser .1 MFD. 200 V. Tubular Clamp, Speaker Cable (Model 721) Sleeve, Drive
Ball Roce
Spring, Drive Shaft Thrust Balls, 3/16" Bolls, 11/32" Spring, Drive String Binding Post, Antenna Window. Dial . Ring, Window Retoining
Escutcheon
Condenser .02 Mfd. 400 V. Tubular .....
Ring Escutcheon, Retaining Reflector Riveted Assembly
Brocket, Reflector Mounting ... .... Bracket, Pilot Light Mounting .....
Terminal Board, Junction (4 Lug) ...... Drive String & Eyelet Assem. Condenser .05 Mfd. 200 V. Tubular Drive Shaft Outer
Drive Shaft, Inner Shield & Eyebolt Assem. (Ist 8 2nd I. F.) Condenser 1100 MMF (Mica) Socket, 4 Prong
Socket, 6 Prong
Drive Shaft Bearing Bracket Gasket, Window
Driva Drum, Hub. & Gear Assem.
MODELS 720-721 CHASSIS 7DB
No, Used Price
4
_ .01
.15
.15 .15
.15
.15 .10
.02 20
.30 .20 .25
.02
.35
.10
.05
2
.02
.02
.10
.10
.15
.10 .60 .25
.20 .50 .15 .10
.10 .10
.25 .35
.10
2
.25
.25
.10
2
.15
.30
.05
1.10
Part No.
Description
No. Used Price
33070 Knob (Model 721)
3
.20
33071 33262 33292 33296 33297
Knob (Ronge Switch( Model 721) Condenser 1065 MMF (Mica) Shield Eyebolt Assem. (Ant. & Osc.) Trimmer Assem. Ant.) Red Dot Trimmer Assam. Osc.)
I
.20
I
.20
2
.35
.40
.40
33299 Range Switch
1.35
33301 Tone Control Pilot Light Sw.
.45
33317 Condenser (Variable)
3.00
33367 Decalcomania, Range Letters
.10
33372 Cond
.0058 Mfd. 700 V. Tubular
.25
33554 Tube Shield Cap
3
.02
33555 Tube Shield Bose
3
.02
33585 Tube Shield Body (Short) )106 & 30 tubes) 3
.10
33730 Antenna Coil 8 Shield Assem.
.65
33732 Oscillator Coil & Shield Assembly
.70
33734 Ist I.F. Coil & Shield Assem.
.75
33735 2nd I. F. Coil & Shield Assem.
.35
33742 Transformer, Audio Input
.80
33747 Lamp, Pilot (2V-.06 Amp.)
15
33775 Volume Control
10
33776 Candohm
.50
33777 Resistor 1.3 Megohm 1/4 Watt
.15
33778 Tube Shield Base
2
.02
33779 33802 33829 33886
Tube Shield Body (32 & 34 Types) Coble, Speaker
Plug Connector "B" Plug Connector "C"
i 2
.10 .15 .10
.10
33880 Jumper Term. Board Assy.
.25
33929 Cable, Battery
1.25
33943 Condenser 8 MFD. 150 V. Wet. Elect.
.80
34383 Resistor 10 Ohm 1/2 Watt. (Flex.)
.15
34435 Condenser .02 MFD-400 V. Tubular (Audio)
.25
34449 Dial Chart
.50
34450 6-1 Amperite Tube
1.60
34461 Pointer & Pinion Assembly (Minute Hand)
.40
34819 Resistor Plug (for Air Cell)
1.00
61207 I s 8-32 Screw (Chassis Mtg.)
4
.01
63839 Washer, Felt (Under Knobs) 63863 Flat Washer (Chassis Mtg.)
4
.02
.... 4
.01
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PAGE 7-20 GRUNOW
MODELS 760,761 Chassis 7C Socket, Triri ners
GENERAL HOUSEHOLD UTILITIES CO.
Chassis,Svritch & Coil Assembly
1,062E ONVB N3N1V3M
318+
©John F. Rider, Publisher
www.americanradiohistory.com
GENERAL IOLS}IOII. i"TILITIN.S CO.
GRUNOW PAGE 7-21
MODELS 760,761 Chassis 7C Scher .t.tc,Voltage
-sf
xSr`ao.$oIF
Ó
,L
<
()John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-22 GRITNOW
MODELS 760,761
Chassis 7C
GENERAI. IIOi'S]+;IIOLI) i"13II,I'l'IES CO.
Aligrunent,Parts
PARTS AND PRICE LIST
SPEAKER PARTS
Models 760.761 Chassis 7C
PART NUMBERS ARE GIVEN ON THE ILLUSTRATIONS AND THE NUMBERS ARE BROUGHT DOWN IN NUMERICAL ORDER FOR CONVENIENCE
Pod No.
ONN:NNo
20045 Terminal Strip Cor«
20047 Terminal Ship
TYPE 101C9
N. Ord Ni. 32227
1
.15 32228
1
.10 33234
Pot 6 Pak Pieu Assn... Speaker Clamp Output Tram.
1
1.5C
.10
1
2.25
Pad No.
Doruiaiee
No.UW NON
20705 Resista. 25 M Ohms I Watt
I
10861 Line Cord and Mug
1
23538 Resista, 200 M Ohms 1/ Watt
2
23849 Resistor, 500 M Ohms I/4 Watt
I
23153 Resista, 50 M Ohms I/4 Watt
2
27784 Resida. 400 Ohms I/ Watt
2
27831 Pilot Light Socket Assembly
3
28045 Pilot Lamp -641 Volt
4
28638 Dial Pointer Screw
28717 Condense , .002 Mid., 700 V. Tubular I
28722 Condenser, .04 MM.. 400 V. Tubular I
28723 Condensa, .05 MM., 400 V. Tubular 7
28726 Condense., .1 Mfd., 400 V. Tubular
1
29074 Condenser, 250-100 Morel. Mica
I
19135 Condenso, .1 MM., 100 Volt Tubular 5
29209 Speaker Cable Clamp
1
29522 Bell II, 32 (Drive Mechanism)
4
29551 Antenna 6 Doublet Binding Post
I
19567 Condenser .02 Mid., 400 Volt Tubular 3
29628 Vertical Termino) Alum.
2
29818 Cord
, .003 MM., 700 V. Tubule I
30091 Terminal Beard (4 Terminal.)
I
30141 Resider, 410 Ghent I Wott
I
30143 Condenser, .05 Mid. 200 Volt Tubular I
30182 Shield -3rd I.F. I
31116 Resida, 1 Ohm 1Ohmi1.)
1
31348 Resista, 6M Ohms 1/ Wott
I
31351 Condenser, 50 MM. Mica
I
31714 Gear Tension Spring
2
31739 Robb« Mtg. Wash« (Var. Cond.) 6
31777 Terminal Board _
I
31778 Terminal gourd
1
31860 Resista, IM Ohms I/ Wok
I
31164 Condenser, .005 MM., 700 V. Tubular I
32099 R.si.tor, 20M Ohms 1/ Wat _
2
32456 Resista. 50M Ohms Wott
2
32462 Knob (Range Switch)
.
I
72592 Cobiul (7611
32624 32692 32693
Baffle (Resonate)
I
Rmiste. IOM Ohms I,'3 Walt (Inc.)
Reidor, I Megehm I, 3 Watt (I..) I
31754 Trimmer Amin.. 4 Gang (Ant. Coil( I
32858 Mounting Fed MINT. (Rubber)
4
32865 Electrolytic Condenser Strop
3
32179 Cam for Dial Indicator
33070 Knob, Vol. Cont. 8 Stn. Selecta
2
S .20 .40 .15 .15 .15 .15 .10 .15 .02 .25 .25 .25 .30 .30 .25 .02 .02 .10 .25 .10 .25 .10 .20 .25 .25 .20 .15 .20 .05 .02 ,10 .10 .15 .75 .15 .15 .30
2.50 ,15 .15 50 25 .05 05 .20
33071 Knob, Tom Cont. 8 Lim Switch
2
.20
33072 Cabinet Escutcheon
.20
33073 Escutcheon RNoining Sping
I
.10
33074 Dial Window
I
.20
33075 Widow R.loining Ring .
.. I
,10
33076 Window Gasket .
I
.10
33103 Speaker Cable Assent
I
.20
33109 Cog Shield (Weather Bad)
2
.30
33120 Tom Control Switch
..
. _
.
I
.80
33119 Vabm. Control
_ I
.90
33129 Resista, 300 Ohms 1/ Watt .
I
.15
...... 33130 Resista, 600 Ohms 1/ Watt
I
.15
33133 Resida, 50M Ohms, 1/4 Watt
.. 3
.15
33134 Resistor, IOM Ohms, I, 3 Watt
I
.15
33150 Antenna Coil
__.
1
3.40
33157 Delectar Coil 33160 Oscillate, Coi
I
.... 1
2.75 1.75
33163 W. B. Podd.r Condenser
I
.95
33169 Condense, 12 Mid. Duo' 25 V Dry
Electrolytic . _...
1
1.00
33179 Bond Indicator-Amber
_ I
.10
33180 land Indicoter-r-O.ang.
i
.10
33181 33182 33262
Band Indicolor-Red Bond Indiccela-Green Condenser, 1065 Mid. Mica
.10
I
.10
.20
33303 5 Prang Socket 524 .
I
.15
33306 8 Prong Socket
.
.15
33369 Condenser. 12 Mfd., 450 Volt Wet
Electrolytic ...
_.
I
1.20
33371 Condenser, 10 MM., 250 Volt Wet
Electrolytic
... ..........
.85
33419 plot Light Socket Amen.
....._ I
.15
33469 Condenser. 18 Mid., 380 Volt Wet
NA No.
Dor,..pown
33618 Tone Control Switch Only
33647 Daakomania-Gold pal.
33659 Light Shield Cover
No. Uxd Moo
I
1.20
2
.10
.10
27216 Transforma Bracket 27140 Cane Mtg. Gasket 32008 Case 6 Voice Coil Ahem.
I
.20 33232 Basket 6 Fran Mate Assen.
I
.10 33807 I01C9 Speaker Complete
I
1 35 33809 Field Coil
SERVICE DATA
I
2.85
1
16.50
I
2.60
32880 Shield for Rang. Switch Coil
32903 Dd. Coil 8 Shield (Werth« Band) I
32904 Osc Coil 8 Shield (Werth« Band) _ I
32915 Variable Condense,
I
37917 Condenser Mtg. Foot (Rear)
_ I
32918 Reflector Bracket Support..
I
32919 Drive Drum, Hub 8 Gear Astern .... I
32924 Sleeve 8 Gear Astern..
I
32927 Drive Shoff
I
32928 Clutch Pin
_
I
32930 Drive Mfg. Frame
32931 I/e" Boll (Drive Mechanism)
15
32933 Toggle Arm (Drive).. _
I
32934 Toggle Spring
2
32935 Drive String 6 Eyelet Ably.
32936 Reflector Bracket
_. I
32937 Pinion. Gear and Adjatable Mate Assen....
3I940 Pointer Pinion
_.......
I
37950 Reflector Most
32952 Dial Fame Welded Asum.
I
32957 Shutter Sping
2
32959 Gloss Clack Did _.
_ 1
32963 Dial Chart 32966 Shutter
I
_.
.._..
32964 Shutter Tension Spring
_...._. I
32969 Spring Connecting Link
_.._ I
32970 Spec« for Did Astern. .. _. ..... 2
32972 32978 32982
Minute Hard Pointer
Drive Spring
_
"Hour" Hod Pointe
_....__ I
_______ 1
I
22986 Light Shield _ .__...._.
______
32988 Padde, Condenser (Broadcast(
I
12989 Condenser, 10 MM. (Mire)
I
31990 Range Switch
1
Trim. 32993
Assess., 4 Gong (Deb C.
I
33030 Power Tramfam«, 115 Volt,
25-50 Cycle
I
13033 Power Transform«, II0'I35-220.l50 Volt, 50-60 Cycle
33037 Power Transform«, 115 Volt, 50.60 Cyde
33042 Id I.F. Cog 6 Shield Asses.
I
33046 2nd I.F. Coi 8 Shield Anent
I
13052 Shield Id I.F
I
33054 Grid Cop
4
31660 Did Assembly (Riveted(
1
33667 Condom«, .025 Mfd. 400 V. Tubular 1
33822 Resistor. 5M Ohms 1 Watt
_
I
33831 Fuse Clip (Eddy Production! _
I
33834 Terminal Mounting Strip (Single Lug) I
33837 Fuse Clip Assembly
-.
I
33841 Fuse (II/e Amp.)
I
33878 Trimmer Asses., 4 Gang (Osc. Cal) I
34401 Drive Mechanism
.. 1
34436 .05 Mfd., 400 Volt Tubulor Cad
34444 Une Switch ..
I
34469 Fuse Cor« ... ....... ....
I
34470 Fuse Cover Liner
34471 Fuse Gip (Lau predudion)
I
34415 .02 MM. 400 V. Moulded Paper Cad. 2
63838 Felt Washer (Knob,)
_
5
63001 13: 32 x No. 10.32 H. H. Set Screw I
63006 1/ s 10.32 H. H. Set Serer
2
63928 63863 63207 65137
Felt Washer (Drive Shaft)
___- _
I
Fat Washer (Chassis Mtg.) _
4
I" x 8.32 Screw (Chassis Mtg.)
4
_
Eyelet (Dial Any.)
I -
PRICES EDBd3LT TO MAIM
7T3TISOT NOTICE
.75
CONTINUITY AND VOLTAGE
1.35 Continuity and voltage readings should be taken from
1,25 the underside of the chassis. The volts« given on the
370 schematic diagram ore average and .bow the Ionise
.hr 05
an to make a quick check of the chassis constants. The
socket layout. given an the schematic diagram
each
Met .10
from the underside.
.75 THE RANGE SWITCH
.50 The Range Switch is a simple three deck multiple pale.
.40 positive acting switch, used to connect the vorious coils
.10 into their prop.o circuits, and is designed in such a ray
p5 that the coils being coud ore isolol.4 from coils of the
.01 tyro succeeding bonds of a lower frequency. In the cru
of the detector circuit both the higher and lower fro. quency bond, chore and below the circuit elected. an shorted out. This swathing arwng«nent not ody selecs the pupae coils for each band, but grounds the unused section, diming the receiver la wort at maximum sem, livity and selectivity on all four rang«.
, The Range Switch d Coo Assembly is shown scMmati.
cagy in figure (3) and it will be noted that deck 1 (Antenna¡ is the one toward the hod of the chassis, deck 11 (Detector)
in the center position ed deck III (Oscillator) toward 184
rear of the chassis. The diagram shows the exact position of the coil and switch lugs. and little difficulty should be
experienced in ',waking any necessary repairs or inspection
.05
CIRCUIT ALIGNMENT PROCEDURE
.05
10 Da not attempt 10 align the 7C Chassis without prep« .05 element. Alignment condense are shown in the ac-
- d companying illusbations, and are numbered in order of
.y2 procedure I.F. Condensen on top ad side the I.F.
.20 Tronsfamers.
.25 I. EQUIPMENT:
30
(A) Test Oscillator.
.02 A modulated Oscillator capable of producing signals
140 at the I.F.. Broadcast, Short -Wove, and weather Band fie-
.0 - a loom's" is necessary for alignment of the IC Chad,. (B) Insulated Screw Driver (x11 bokelife Frbrei about 6" beg.
A5
(C) Output Meta.
.01
This may 6e any of the standard Output Melon, but
.03 should be suecien0y sensitive 1e provide a good deflection
.10 at law signal strength.
.10
(D) Coupling Means.
.10 Coupling Cord _____ e of 100 mml...25 mfd., and a 400
.10 Ohm resistor should be used when coupling oscillator to
.35 receiver during alignment os specified in the procedure.
.20 4.25
,50
12110
(E) The receiver 'Muhl be &aligned in a 'motion
- - free from local interference (int.rf«anu caused by moron flashers automobile ignition, etc.) as high frequency disturbances will cause difficulties when the short wave
section is being adjusted. (A screen roam it to be recom-
mended.)
17.00 2. DIAL SETTING:
Turn dial knob until condensers are fully meshed. The dial eAg pointer (Hour hand) should be on 184 haisum al line of the
3.50 dial, pointing l0 9 and 3 o'clock.
2.00 The minute hand should beat 12 ó deck or in a vertical
.30 position.
AI 1. I.F. ALIGNMENT:
2.15
(A) Caned signal lead of test owi5d.. to grid
25 of 6A8 (1st detector tube) through .15 mid. condenser.
20 Conned the ground lead to the chassis.
.10
15) Bela. any adjustment of circuit condos, is
attempted, allow the chassis to "heat up" to normal op.,-
.10 sling temperature. This healing period should tats from
.10 20 to 30 minutes and is necessary to allow o8 tails ad
.10 condensers to reach their normal lemperolures so that when olignmenl is completed, there will be no inductance
50 capacity changes 4er to thermalexponuen or contra.
1.00 tion.
- .35 It is good to remember this heating condition when
.IS
legging station that is, do not attempt in a station previaudy logged on a "cold"
to log or tune chassis, as 11.e
.10 station being tuned in would "drift" and the calib..loe on
.05 the previously logged ,lotion would b. incorrect.
20
(CI Set Dial point« to 1400 K.C. and .eng.
switch on "Green" (N... 2) position.
.25
(0) Mau test Oscillator in operation at 455 K.C.
.02 Tan reueiver rolune control and tan. control to maximum.
.05
(E) A55.ntiole test O,illolo, output to lowest
.OI value, consistent with obtaining a wadable indication on
output mete-.
.OI
(F) Adjust the five I.F. Trimmers. Al. A2, A3, M,
01 AS, located on the I.F. Transformers on top o1 chords
.01 Fig. (1), until maximum output is °Moind. Daring
g, meld, maintain as low a vane of signal as rì8 alleir obtain-
ing of ad al. adjustment.
4. 175 K.C. ALIGNMENT:
(A) Connect dgnol lead of test ocillata through 200 mid. Condenser to Antenna binding pest on Chani.
(8) Conned the lest oscillator ground nad to the ground post of Maui,
(C) Mau test oscillator in operation a1 175 K.C.
(D) Tune in ,ignal to ma
(this point dus
nul have to be *sadly al 175 K.C.dumiol setting) raga
switch on "Red" (No. I) position.
1E) Adjest the 175 K.C. Poddng Condensa (A61
Fig. 2 (which h on rear of Chassis) in direction of signal
increase. At the some time rot the tuning condenser bad and forth trough resonance whin adjusting podding un.
denser, until maximum output is ebloined.
5. 350 K.C. ALIGNMENT:
(A) Mou lest oscillator in operation at 350 S.C. ¡I) Turn did peint« to 350 K.C. IC) Turn ronge switch to -Rd" 1N.. I) position. (D) Adjust "weather Bond" indicter himm« (A7) Fig. 2, to maximum output.
1E) Adjust Detect« Trimmer (Al) Fg. 2, to maximum output.
(F) Adjust Antenna Trimmer (A9( Fig. 2, te max-
imum output.
6.
- - RECHECK 175 K.C. PADDER CONDENSER
S.e 4 abats.
7. 1400 K.C. ALIGNMENT:
(A) Mace test oscillator in operation at 1400 K.C. (8) Turn did pointer to 1400 K.C.
IC) Turn .ange switch to rang. "Green" (Na. 2) position.
10) Adjat broaden! guilder trimmer (.A101 Fig. 2. to maximum output
(E) Adjust 1,t Det. Trimmer (Al I) P`g. 2, to maxi. men output.
(F) Adjust Antenna Trimmer (AI2) Fig. 2, to maximum rompu].
8. 600 K.C. ALIGNMENT:
(A) Mau test Orono5or in operation at 600 K.C.
(8) Tune in signal to m
m (this peint does
not hove to be exactly of 600 K.C. did setting.)
(C) Adjut the 600 K.C. Podding Condenser
(AI 31. Fig. 2. which h en rem of Chassis. in direction of
signal inaw,s. At wane time rod the tuning codeur«
pd bad od forth through reunonse whin adjusting
ding condenser until maximumoutput is obtained.
9. RECHECK 1400 K.C. ALIGNMENT: See 7 oboe..
10. 5003 K.C. ALIGNMENT:
(A) Set range switch to "Orage" (No. 3) puce
fion. 18) Mouton Oscillators in operation at 5000 K.C.
(CI iurn did pointe. te 5000 K.C.
(D) Adjust Set Oscillator Trireme (AI4), Fig. 2. Io madmen output.
(E) Adjust Detector Trimmer (A15) Fig. 2, to ma. insum output.
IF) Adjust Antenna Trimmer (A16), Fg. 2. te
ma.rmum output.
11. II M. C. ALIGNMENT: (A) Conned signal Ind of lest oniala. through
400 Ohm resider to Antenna binding pat of Chossis.
(B) Connect the gaud lead ta geed teeming'
of Chassis.
(C) Sel Rang. Switch to "Arab«" (Ne. I poi. Sion ad turn dial pointer ta 18 M.C.
(D) Mau Test Onilata in munition at 18 M.C.
(E) Adjust set oscillator Trimmar IA17) Fig. 2, to maximum output.
(F) Adjust Detector T,i..m.. (A18) Fig. 2, to maximum output.
(6) Adjust Antenna Trireme (A191 Fig. 2, te monm m output.
(H) On the 11 M.C. Oscillator Alignment it rib
be noted that thee are two settings at which the signal will be received. Use the ken« of the image, foe .Fgn-
ment point, thol is, the setting giving most capacity or
.Ild the point .5
the trimmer surer is farthest in.
Bed.olytic
.90
©John F. Rider, Publisher
www.americanradiohistory.com
GENERAL HOUSEHOLD UT'ILI'TIES CO.
GRUNOW PAGE 7-23
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-24 GRUNOW
MODEL 871 Chassis 8E Socket, Trimmers Chassis
GENERAL HOUSEHOLD UTILI'ITIES CO.
34388
33469
TYPE 648 TUBE
1ST. OCT. 6 OSC.
TYPE 5Z4 TUBE
RECT.
t--20861
29551
TYPE bF6.TUBE
POWER OUTPUT
33308 33042
TYPE 6K7 TUBE
1 F.
e 33306
33306
32915 32604
TYPE 6F6 TUBE
POWER OUTPUT
TYPE 6C5 TUBE
AUDIO
33308
33306
33303 33306 33306
POWER TRANSFORMER 33028-115V. 50-60 CYCLE 33031-115V. 25-50 CYCLE 33032-115-135-220-250v.
50-60 CYCLE
e
33371
33852
TYPE 6H6 TUBE 33665
2 N0. XT. 6 A.V.C.
33119
33071 -Im
32099 33070
-
32462
33070-9.
33071
TYPE 6K7 TUBE
R.F.
-170T-'VIEW
33837
28723
32476 32459 30092
FUSE LOCATED PERE
ON LATE PRODUCTION
-"34469 33842 INSIDE
32436
29135 32456
FUSE LOCATED HERE ON EARLY PRODUCTION
23723
34485
34485-i
31778
29135 33130
33667 3129
33133
o
,
33133
er)
28726
I
32754..
33262 o \ 33160
27784/
29628 --
32993 31680
33157 29567
32989
26717 26717
33622
31600 32987 30143 33133
CHASSIS 8E NOV. 1935
RAS 102
34444
29135
33760
20705
29567
32990
BOTTOM VIEW(
33120
29567 31661
32692 31777 29074
©John F. Rider, Publisher
www.americanradiohistory.com
GRUNOW PAGE 7-25
GENERAL HOUSEHOLD tTTILITIES-CO.
YODEL 871 Chassis 8E
Alignment Parts List
SERVICE DATA
CONTINUITY AND VOLTAGE
1d. Continuity and vdtog. readings Arnold M
froc
the urdenide of the chord, Ti.. rob« given on the schematic diagram an avenge end allow the ,mv.w
an to male a quick check of flee chassis can.tanb. The
socket layouts giron on the whematb digram doer ooh sockel from the udenide.
THE RANGE SWITCH
The Range Switch it o simple then dock multiple pole. p«.nive acting switch, used to connect the vorimrt soi. into their proper cìncoitt and k designed in such a way
that the coils being es. an isolotd from cogs of the two ..ceding bonds of a boer frequency. In IM core
of the detect» circo,t both the -higher ond lower frequ.cy bards, above and below the circuit ad«bd, an shorted out. This .witching arrangement not only wlecb
th proper coil. for each bad, but greed, the unused matron, allowing the receiver to .oh at maximum wnsi-
livery end .doctiuity an .N low rang«.
The Ronge Switch and Col Assembly h sloo.e schemati-
cally in 5g«. (3) and a .ill be rwld that deck I (Arrlenna)
c.a., is the one toward the hand of the
dock II )DetMar)
in the uhtur pillion od sled III (Collator) .word the
rear of the cbsa.. The diagram shown the exact positron
of the coil ad switch log, o 0 1,14. diffiaay .hold 6.
experienced in making any Ames», r.poin or inspection.
CIRCUIT ALIG NMENT PROCEDURE
De net attempt to align the 8.0 Clwssls without pop«
« equipment. Alignment condemn. an down M the
6.
- - RECHECK 175 K.C. PADDER CONDENSER
See 4 abord.
- componying il4.botion, end are numb«. in ord.. of
proudure I.F. Condemn on top and side of the I.F. Transform*.
7. 1400 K.C. ALIGNMENT:
(A) Mao lest aroib.r in op«etion at 1400 K.C.
I. EQUIPMENT:
(A) TM OsaAalar.
A modulated Owilat» capable of »educing dgn,. at the If., Broadcast, Short-War., and wooden land frequencies is no«tory I« alignment of IM 8-E Cho«..
(1) Imulat. Screw Driver -(dl bkeMe «lb..)
oboist 6" long.
(C) Output Mel«.
...etc This my be any of the standard Output Meters, but
should b. sufficiently
provide a good defl.ction
at low sign] strength.
(I) Turn did paid« le 1400 KC. IC) Turn range »rad to range "Gress" (No. 2) podia. (D) Adjust breadcat oscilad» bimmar (A10) Fig. 2. to maximum output.
(E) Adopt Id Dd. Trimmer Al( I) Fig. 2, to madmum eutpu .
)FI Adjust Antenna Trimmer (0.12) Fig. 2, to mad. mum output.
4. 600 K.C. ALIGNMENT:
(A) Mace t64 Owlatar in operation 01600 K.C.
d... a. )D) Coupling Means.
Coupling C.
of 200 mod., .25 mfd.,
a 400
Ohm resistor should be used when coupling .Mator le
receiver during alignment a. sp.ciFed in the prec.d.re.
(Q The ...inn. shark be aligned in o bcatia
- - free from local interference (Interference tausad by motor. amber. automobile ignition, etc) es high frequency
(b) Tow in .gal lo maximum (this point do«
net hen to M exactly at 600 K.C. did »Ring.)
)C) Adjr1 de 600 K.C. Padding Condenser
a mr (AI3), Fig. 2, which k
of Chassis, in direction el
signed incraw.. At tome time rod the tuning condenser
bad and both Waugh resonance while adjusting pod-
ding condense. until moximum output is obtained.
disturbance, oil car» diflwki« when the dad wan
9. RECHECK 1400 K.C. ALIGNMENT: S.. 7 above.
section it being adjust.. (A oreen room is to be rec«n-
10. 5000 K.C. ALIGNMENT:
me.ed.)
(A) Sot rage switch to "Ore g." No. 3) posi-
2. DIAL SETTING:
tion.
Turn bob until codom.r. are folly needed. The did
b pointer (How hand) should on the horiontol line of the
dial. pointing to 9 end 3 o'clock.
The minute hand should beat 12 o'clock or in o vertical po,itioo.
(I) Mec. 1«I Owiloto,s in opnatian at 5000 KC.
)C) Turn did point» lo 5000 K.C.
)D) Adjust Set O,cibter Trim. (A14), Fig. 2,
to maximum output.
(E) Adjosl Dot... Trimmer (A15) Fg. 2. to max.
3. I.F. ALIGNMENT:
(A( Connect signal lead el test oscillator to grid of 6A/ (1st dated« tub) eheogh .25 old. condemn.
Connect the ground lead to the chop..
...it (R) Before any djrtm«d of
constants is
attempt., allow the chetahs to "heat up" lo areal ape
al. oling temperoboe. Thit bating (oind should tote from
20 to 30 mind« and is necessary to
of coils and
condemn. to reach their normal t.mp..atur. o. that
when olignmed is completed, there will be no inductaae
or capacity thonges dun to thermol expansion o. contrac-
tion.
- at II i. good to re ember thick heating cenditron when
logging station that is, do attempt to log or tune
a in a elation p«ioudy logged s "cold" chop.. a the
station being tuned in would "drift" and the cdibrotion an the p.rieody logged elation rook be incorrect.
)C) Set Dial pointer to 1400 K.C. and rage
switch on "Grimm" jNo. 2) podtion.
)D) Moen test Ow11ator in op.rat''n at 455 K.C. Turn r.uirer volum control and tone control to mxm.m.
(E) Attenuate test Oscillator output to lowest rah.e. umident with obtaining o readable indkatia en
imam output.
ol.t (F) Adjust Anted. Trimmer (All), Fg. 2, to
maximum
11. 11 M. C. ALIGNMENT:
wad. (A) Camel signal lead of 1«t
through
400 Ohm woks.. Io Aden. binding pod of Chassis.
II) Corned the grand lead to ground nominal
of Chasi,.
"Mb:" )C) Set Range Switch to
(No. 4) pod:
do and tern dial poirier to 1/ M.C.
ID) Mau Ted Owla1» in operation d 11 M.C.
1E) Adj..t sel ewiolar Trimmer (A17) Fg. 2. to
maximum oulpol.
(F) Adopt Detector Trimmer (AI/) Fig. 2. la maximum output
(G) Adjust Antenna Timm . (A19) Fig. 2, to maximum odpe!
(H) On the I1 M.C. O,alot» Alamo. it .R be noted Mat Herr. or. 1.0 getting. ot which the .gal .ill be received. Use the beret of the images for alignment point, that ., the setting giving most capacity or
. the point at whirl the trimmer forthed in.
output meter.
(F) Adjust the Fire I.F. Trimmer.., Al. 02 A3, A4.
ch.. AS, bunted on the I.F. Transformers an top of
m.io Fig. (I), until
n output k obtain.. During align.
med. maintain es bur o value of xignol as will odew obtain-
ing of accurate edjustmnt.
4. 175 K.C. ALIGNMENT:
(A) Caned signal hod of test owllat» through
200 mml. Condenser to Aelenno binding post on Ghoul..
j0) Caned the test oscillalar ground leod to the
ground post of chassis.
owl.» )C( Mau tat
in operation at 175 K.C.
SPEAKER PARTS
Pod eNl .
20010
TYPE 10A10
P Cheviot*
Speak« Fat 6 Pole
20041 27240 32604
Speaker Clamp
Spook« 6m./
_. _ _..
IOAI0 Sped. Completi
33010 Field Coil
_.
33143 Output Tremo
N. 0.,nPr.
I
1.15
.
I
.10
.. I
.10
.I 11.50
_ I
3.00
I
2.15
(D) Tune in Agnol to maximum (this peint dos not hone to be exactly ot 175 K.C. did setting) .rage switch on "Rd" (No. I) position.
(E) Adjust the 175 K.C. Podding Condemn. (A6) Fig. 2 (which is on ma of Chm,io in direction of signal
increose. At the cam time rod the lung code.. bock ond forth through ...non. while dj.ting podding con-
denser, until moamm output is obtained.
33202 Teroiml Strip Awm.
I
.20
33203 Te.mind Strip Coen
I
.10
33304 T.rmind Strip Cerar Imul.
1
A5
33231 Tr«nfermer Model
I
.10
34403 Cene 6 V. C. Auer.
1
1.60
33644 lade. 6 bunt Plate Mom.._..._.._ I 2.45
5. 350 K.C. ALIGNMENT:
(A) Mau te.t ecilotor in operation at 350 K.C. (I) Turn dial pointer to 350 K.C.
)C( Torn range switch to "Red" (No. I) petition.
(D) Adjust "weather land" o.io1» trim.
(A7( Fig. 2 to maximum otput. (E) Adjust Dried» Trimmer (AI) Fig. 2, to max.
imam output.
(F) Adjust Antenna Trimme (A91 Fig. 2, to max.mum output.
PARTS AND PRICE LIST
Model 171 Chatty 6E
PART NUMBERS ARE GIVEN ON THE ILLUSTRATIONS AND THE NUMBERS ARE BROUGHT DOWN IN NUMERICAL ORDER FOR CONVENIENCE
Ion Na.
Dm.nN..
Nn Ur1 Nee
20705 25 M Ohm I Watt Raout..
I 6 .20
20461 Line Gerd od Plug ......... ............. I
.40
23153 50 M Ohm 1/4 Watt Resistor
27764 400 Ohm I/ Weft Resistor
2
.15
2
.15
27131 Pitt Light Socket Amen.
3
.10
21045 Plot Lamp 6.8 V.k.
4
.15
21631 Point« Sow
I
.02
21717 .002 Mid. 700 V. Tubular Cadras» 2
.25
21723 .05 Mid. 400 9. Tabula Conde..«.._ 2
.25
21726 .10 Mid. 400 V. Tubular Cerd.m.r ... I
.30
29066 Electrolytic Condenser Clamp _ .._ 3
.05
29074 100 - 150 Mol. Condenser (Milo) .. I
.30
29135 .10 Mfd. 280 V. Tubular Condenser __ 6
-25
29209 Speaker Coble Clomp
I
.02
29522 11,32 UN (dire M«heniun).__. 4
.02
29551 Antenno Biding Pool Aswm.
I
.10
29567 .02 Mid. 400 V. Tubulor Codenwr_.. 3
.25
29621 Vortical Terminal Awm. (4 Lag.) _- 2
.10
30092 Terminal Strip (4 Lugo .._..
I
.06
30143 .05 Mid. 204 V. Tubular Cad.m.r.... I
25
30112 2d I.F. Shied
I
.25
31116 Resistor I Ohm (Ohm..) ....._...... I
.20
31351 50 Md. Ced.n.or (Nicol
31637 Condenser Mounting Stud
I
.20
- 2
.02
31714 Spring (gear tnmia)
......
2
.05
Co.- 31739 Rabb. Mfg. Wadhen Va.
6
.01
31777 31771 31/60 31841 32099 32456
Terminal Strip (8 Lugo Junction Terminal bord (4 Logo
2 M Ohm 1/ Watt R.d.t. 500 Md. Conde.. (Mica) 20 M Ohm 1/4 Wolf R.ádar 50 M Ohm I/ Watt Ronde.
I
.10
I
.10
2
.15
I
.20
I
.15
2
.IS
32457 490 Ohm 6 Watt Resistor.._._.._-. I
.35
32451 220 Ohm 2 Watt Raider __.._ I
.30
32459 3/00 Ohm I Watt R..ida ...... 1
.20
32462 Kn. (Rang. Switch)
I
.30
32692 Resistor 100 M Ohm 1/3 Watt hod. I
.16
32693 I Mono.. 1/3 Watt R«id«._.._ I
.I5
32754 4 -Gag Trimmer Assour. (Arden.).._. 1
.50
32151 Mounting Fool Ao..m. (Robber) 33031 Pe... Traunf»m«
4
.25
33032
33042 33046 33052 33054
IIS V-25-50 Cycle (SEX)
..__ 1
Power Tra...former 110 V
131220250V-50.60 Cyd. (IEi) I
1st I.F. Col 6 Shield Aswm.
Au.. Ind I.F. Col 6 Shield
.... I
I
Id I.F. Shield
1
Grid Cop ..._.
_..._...__.... 3
9.00
9.00 3.50 2.00 .30
Al
33070 Knob Vol. Corbel 6 Station Sabo 2
.10
33071 Knob Tone Cabri 6 O. -OR Serilch_ 2
.20
33072 Cabinet Escutcheon
1
.10
33073 Escutcheon Retaining Sprig
1
.20
33074 Did Winder
1
.20
33075 Window Rdoinig Ring
I
.10
13076 Window Godet _.. _. ___
1
.10
Gil 37109
aM.11 (W. 1.) _ _ _. _. 2
.30
33119 Velum Control _. ______
I
.90
33120 Toe Control Switch
._...._
1
.50
13129 300 Ohm 1/ Watt Redden _. _.. I
.15
37130 600 Ohm 1/4 Wolf Resistor
/ 33133 SO M Ohm Wolf R..idn
.15
3
.15
33134 100 M Ohm 1/3 Watt Rest»
I
.15
33150 Antenne Col
I
3.60
33157 Detector Cal 3310 Owiel» Col A,.m.
-
I
1
2.75 1.75
11163 Wuther land Padden Condenser
I
.35
13179 Amber land Indicator _
_
I
.10
33180 33111 33112
Orange bend Indicate ...
R. land Indian.. Gmn lad Idoobr ......
1
.10
I
.10
I
.10
33262 1045 Mob. Condenser (Mica)
33303 5 Prong Sad.!
_
I
.20
I
.15
33306 4 Prog Socket
7
.IS
33371 10 MN. 250 V Wet B.atrdytic C
1
A5
33419 Plot Light Socket Assen.
1
.15
33467 33469 33591 33622 33425
Docaoemenia (Geld Dao
2
18 MN. 300 V Wet Etclolyl. Cend. I
12 MN. 450 V Wet Electrolytic Cond. I
Audio Input Tr...fome.
lalb (Re...ter)
_____ 1
_ 1
.10 .90 1.10 '5.75 2.50
P.O No.
D.oa,N:..
15..1.10.4 Prie.
32165 Electrottic Clamp
I
05
12179 Cam (Sind.)
I
.05
32110 Rogo Switch and Cod Cover A...... 1
.76
32903 Detector Coil & Shield Aum.____. I
1.35
32904 O.ilotar Coi L Shield Auem
I
1.25
32915 Variable Cadem«
I
3.70
32917 COnd...., Mtg. Foch (Rwr)._..._._ I
.06
32911 Reflector Model Support___
I
.10
32919 dire Dom, Hub 6 Gear Auent.... I
.75
32924 Sleeve 6 Gear Auam.___ _..... 1
.50
12927 dire 51.011 32921 Odd Pin
I
.40
I
.05
/ 32930 dive Mtg. F.oae........... ... .-
32931
loll (dive Mechanism(
_.. I 15
.05 .01
32933 Toggle Mn (diva)
I
.05
32934 Toggle Spring
2
.05
- 32935 dive String _.______._. I
32936 Reflector Model
I
.10 .05
37937 Pinion Gear 6 Adjusting Plot Awro. I
.70
3290 Poieler Pinion .
_ 1
.10
32950 Ref odor Mod._.._____
I
.25
32952 Did Fame Weld.. Awn. __.__. 1 .]0
32957 Shutter Spring
2
02
_-_ ..-.__.___ 32959 Glow Clod Did
1
31963 Dial Chad
I
1.40 .60
---- 31966 Shutter
-_..
. I
32964 Shutt. Tendon Spring
I
.10 06
32969 Spring Connecting Lirai.__.__. I
Al
32970 Spaces (Did Mtg.) __.-_______ 2
.02
32972 Mind. Hand Point«
32971 d' Sping
I
.10
I
.10
32912 Hour Poieler ____
_ I
.10
32984 Light Shield
I
.10
32947 Dry Electrolytic Cad. 12 MN. 26 V_. I
.75
Cod.nr__. 32916 broadcast Padden
I
.35
Co... ._.- 32919 10 Mmf.
(Mica)__
1
:20
32990 Rage Switch
I
4.25
32991 4 -Gang Trimmer Awn. (D.I.oW)-. I
.60
33021 Power Tro.orm.r-
115 V-50.0 Cyd.
1
7S0
33659 Light Shield Corer
33660 Did A.m.y (Rill.) .
1
.10
1
2.15
33665 .03 MN. 200 Val Tub. Condom
1
.25
11667 .025 MN. 400 Veil Tub. Cend.ma._. I
.25
3370 .006 MN. 700 Volt Tub. Condenser__ I
.26
33137 Fu. Dip Awn. (Early Prodmtion).__ I
.10
33842 Fate (2 Amp(
I
.10
33152 10 MN. 475 Wet EfAdytic Cand. h
.95
33171 4 Gag Trimmer Mom. (0.o.(.. ____ _ 1
.SO
34344 1500 Md. Condenser (Mice) 467// Spoke Cable A.....
I
.20
I
20
34401 dive Medwusoum 34444 Lle. Switch
.._.. 1
100
...._ 1 .46
34449 Fuse Corer ........__..._ .............._ I
.10
36470 Foo Corer Liner.
_______
I
.05
34471 Fuse Cop (Lat. Predu.0en( _._._.... . I
.10
34445 .02 MN. 400 V Madded
Pop. Condenser
.......
1
.25
61207 I" x 1-32 H. H. M. So..
(Ches. Mtg.)
___
.01
63138 Fol Wosh.., for Coobel Knob
S
.02
63843 Flot Wash« (Chetah Mg.) ..
4
.01
63934 Mod Fell We,d« (Drin)
I
.02
65337 Eyelet fer Did Assembly
I
.02
Prices soloject to change without notice.
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-26 GRUNOW
MODEL 921
Chassis 9C
Schematic ,Parts
Alignment
GENERAL HOUSEHOLD UTILITIES CO.
NO. 6E7 TYPE 45 TUBES
TYPE 60 TUBE NOB TYPE 37 TUBE 183.8 TYPE 647 TUBE NO 2 TYPE 76 TUBE NO. I
NO.3 TYPE 76 TUBE NO.5 TYPE 76 TUBE NO.4 TYPE 65 TUBE
10
3TOP VIEW CD CD er)
3Oi
NONVWO\ `._.
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FolijixPor
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'-i--John F. Rider, Publisher
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www.americanradiohistory.com
GENERAL IIOUSEIIOLI) UTILITIES Co.
GRUNOW PAGE 7-27
MODEL 1171 Chassis 11C Schematic Voltage
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-28 GRUNOW
MODEL 1171 Chassis 11C
GENERAL HOUSEHOLD UTILITIES CO.
Socke t, Trirmner s
Chassis,Switch &
Coil Assembly
I
wEATND. 31003 CRECN
AVCAI-
D 3EC.
3333
tin
SROW
RED
WEA}N[ SAND 3]003
W[ATNER
S D
33004
C lfC.
BuR3IO O3CT».Cuml.
34733 EA.
D
03C COIL WEATHER SAND
331001
33004
0 31C.
D rRl CrR.
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www.americanradiohistory.com
Mechanical Alignment
Parts Details
GENERAL.
HOUSEHOLD
uT'l'ILI'l'IES
CO.
GRUNOW PAGE 7-29 MODEL 1171
Chassis 11C
33206
33212
33221
BACK OF CHASSIS-Io'
DIRECTIONS FOR MECHANICAL ALIGNMENT OF I.F. TRANSFORMERS
FLATS(A)ON THE VERTICAL SHAFTS SHOULD BE MADE PARALLEL WITH EACH OTHER BY ADJUSTING CONNECTING ARM AT (13), TURN THE HIGH-FIDELITY SWITCH CLOCK-WISE AS FAR AS IT WILL GO, (NO.6 POSITION),IF THE SWITCH DOES NOT TURN TO NO.6 POSITION, LOOSEN SET SCREW(C) AND TURN SWITCH WITH GEAR LOOSE. WITH SWITCH IN THIS POSITION, MOVE THE LEVER ARMS SO THAT THE FLATS (A) ARE PARALLEL TO THE BACK OF THE CHASSIS BY ADJUSTING LEVER AT(D). TIGHTEN ALL SCREWS AND BE SURE THE SWITCH COVERS ALL SIX POSITIONS EASILY WITHOUT BINDING. NOW PROCEED WITH ELECTRICAL ALIGNMENT.
DT
FIG. 2
RAS 118
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-30 GRUNOW
MODEL 1171 Chassis 11C
GENERAL HOUSEHOLD UTILITIES CO.
Alignment,P arts
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. GENERAL HOUSEHOLD UTILITIES CO. <;o
GRUNOW PAGE 7-31
MODEL 1241 Chassis 12A. Schematic,Voltage
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www.americanradiohistory.com
PAGE 7-32 GRUNOW
MODEL 1241
Chassis 12A Socket, Trimmers
GENERAL HOUSEHOLD UTILITIES CO.
Chassis
TYPE 6F6 TUBE
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Nov. 1933
RAS 116
www.americanradiohistory.com
GRITNOW PAGE 7-33
GENERAL HOUSEHOLD UTII,I'l'IES CO.
MODEL 1241
Chassis 12A
Alignment,Notes
Parts List
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www.americanradiohistory.com
PAGE 7-34 GRUNOW
MODELS 1291,1297 Chassis 12B, 12W Socket,Trinnners Chassis
2-6F6 TUBES ON 125 2-6L6 TUBES ON 12W
GENERAL HOUSEHOLI.) UTTILITIES
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TOP MIDDLE BOTTOM
John F. Rider, Publisher
CHASSIS BOTTOM VIEW www.americanradiohistory.com
CHASSIS 12B 8 12W AUGUST -193e
RAS 187
GENERAL HOUSEHOLD UTILITIES CO.
GRUNOW PAGE 7-35
MODELS 1291,1297 Chassis 12B, 12W
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www.americanradiohistory.com
PAGE 7-36 GRUNOW
MODELS 1291,1297
Chassis 12B, 12W (TFNF.Rt1I, HOUSEIIOLll u'I'II.I'I'IES CO.
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www.americanradiohistory.com
GRUNOW PAGE 7-37
GENERAL HOUSEHOLD UTILITIES CO.
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-38 GRUNOW
Range & Fidelity Switches Schematic Range Switch & Coil Schematic. Speaker
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www.americanradiohistory.com
GENERAL HOUSEHOLD UTILITIES CO.
GRUNOW PAGE 7-39
MODEL 1541
Chassis 15W
Sock et, Trimmer s
Parts Details
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03302
35959
John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-40 GRUNOW
MODEL 1541 Chassis 15sß Chassis Alignment Curves
GENERAL. HOUSEHOLD UTILITIES CO,
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©John F. Rider, Publisher
www.americanradiohistory.com
GENERAL IIOL'SEIIOLD LT'I'ILI'l'IF.S CO.
GRTJNOW PAGE 7-11
MODEL 1541 Chassis 15W Alignment,Part 1
IXTRODUCTIOR
The Gruoow 15-W Chassis is a fifteen Metal tube, 115 Volt, 50-60 cycle A, C., four band receiver with Automatic Volume Control, Variable I. F. system, of Ni -fidelity control, Tone Control, "Band Spread" dial end Automatic Frequency Control with the Teledial. The tubes and their functions are as follows: 1-667 R. F. Amplifier, 1-6L7 1st, Detector, 1-6J7 Oscillator, 1-667 1st. I. F. 1mplifier, 1-6K7 2nd. I. F. Amplifier, 1-6R7 2nd. Detector, A.V.C. and 1st. A. F. Amplifier, 1-605 Driver Stage, 1-6F6 B. F. Audio Output, 2-6F6 L. F. Power Output, 1-61(7 Automatic Frequency Control Amplifier, 1-666 A. F. C. Discriminator, 1-6J7 A. F. C. Control and 2-524 Rectifiers.
The frequency range Se divided into four bands or divisions, one covering the "Standard Broadcast" Band (Green) 550 to 1720 K.C., one the "Police -Amateur" Band (Amber) 1720 to 5500 K.C., one the "Foreign Broadcast" Band (Yellow) 5.5 to 18.20 Megocycles and one the Ultra Short Wave Band (Blue) 17.6 to 72.0 Megocycles.
Continuity and Voltage.
Continuity and voltage readings should be taken from the underside of the chassis. The values given on the schematic diagram are average and allow the service man to make a quick check of the chassis constants. The socket layouts given on the schematic diagram Show each socket from the underside.
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PAGE 7-42 GRUNOW
MODEL 1541
Chassis 15W
GENERAL HOUSEHOLD UTILITIES CO.
Alignment,Part 2
The Range Switch
The Range Switch iá a simple four deck multiple pole, positive acting switch, used to connect the various coils into their proper circuits, and is designed in such a way that the coils being used are isolated from coils of the two succeeding banda of a lower frequency. In the case of the detector circuit both the higher and lower frequency bands, above and below the circuit selected, are shorted out. This switching arrangement not only selects the proper coils for each band,
but grounds the unused section, allowing the receiver to work at maximum sensitivity and selectivity on all four ranges. The Range Switch and Coil Assembly is shown schematically in fig. (2) and it will be noted that deck I (Lights) is the one toward the front of the chassis Deck II (Antenna) is the second position, Deck III (Detector) in the center and followed by Deck IV (Oscellator). The diagram shows the exact position of the coil and switch lugs, and little difficulty should be experienced in making any necessary repairs or inspection.
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www.americanradiohistory.com
PAGE 7-2 GOODYEAR
MODEL 777
Series A & B Trimmers, Socket
Parts, Layouts
GOODYEAR SERVICE
TOP VIEW - SERIES A
TOP VIEW - SERIES B
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Parts Used Pata Used
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1.50 1.50 1.00
109-15 Not Used.
Not Used. 109-17
Mid -WaCveom&pleSthe-oLrtesWsavCe anR.F.
Broadcast R.F. Coil Assembly
Coil Assembly
Complete-Less
Can
1.50 .70
- Not Used. 109-18 Mid-WaCveom&pleSthe-oLrteWssaveCanR.F. Coil Assembly
110.18 Not Used. Broadcast Oscillator Coil Assembly Complete
1.50
Lees Can
.50
110-19 'Not Used.
Not Used. 110-24
Mid -WaCveom&pleSthe-oLrteWssaveCaOnscillator
Broadcast Oscillator Coil Assembly
Coil Assembly
Corn -Less Can
1.25 .75
Not Used. 110-25 Mid -WaCveom&plSetheo-Lrt eWssaveCaOnscillator Coil Assembly 1.50
111-23 Not Used. Broadcast Antenna Coil Assembly Com.-Less Can 1.00
111-24 Not Used. Mid-WavCeom&pleSteho-Lrt eWssavCeanAntenna Coil Assembly 1.50
Not Used. 111-29 Broadcast Antenna Coil Assembly Com.-Less Can 1.00
Not Used. 111.30 Mid -WaCveom&pleSteh-oLrtesWs aCvean Antenna Coil Assembly 1.50
TRANSFORMERS
104-23 Not Used. 50/60 Cycle Power Transformer
3.50
104-24 104-25 104-26
-40 -25 Not Used. 25 Cycle Power Transformer
Not Used. Universal
Cycle Primary
Not Used. Universal
Cycle Primary
Not Used. 104-27 Not Used. 104-28 Not Used. 104-29 'Not Used. 104-30
50/00 Cycle Power Transformer
2UU5nniivvCeeyrrcssalaell--P24o50weCCr yyTccl'reeanPPsfrroiimmrmaaerryyr
5.00 7.50 6 00 4.50 7.00 7.50
7.0(1
SPEAIRRB
114.13 114-13 Six Inch Speaker
6.00
114-17 114-17 Eight Inch Speaker 114-18 114-18 Ten Inch Speaker
6.80 8.00
101-23 101-24 102-16 107-5
101-23 101-24 102-16 107-5
MISCELLANEOUS Volume Control and Switch Tone Control Three Gang Variable Condenser Line Cord and Plug
6.S0F7R7y-E0.MX, /ACNOW6'
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©John F. Rider, Publisher
www.americanradiohistory.com
GOODYEAR PAGE 7-3
GOODYEAR
NOTE: IN SERIES B THE TYPE 75 WAS REPLACED BY TYPE 6117 DUPLEX DIODE PENTODE AS A SECOND DETECTOR, A.Y.C. AND AUDIO. Series A and B chassis are serially numbered on the back flange of the chassis, series A beginning with number "5B104021A" and up, series B chassis beginning with number "5D114175B" and up. Series A and B may be identified by the letter "A" and "B" at the end of the serial numbers. Transformers are available and chassis are sometimes equipped with universal transformers for operation on 40 and 60 cycles and with primary tape for 106, 125, 150, 220 and 250 volts (see instructions) and aleo sometimes equipped with 25 cycle transformers with 106-115 volt or 220 volt primaries, not universale.
SERVICE NOTES Voltages taken from different pointa of circuit to chassis are measured with volume control full on, all tubes in their sockets and speaker connected, with a volt meter having a resistance of 1000 ohms per volt. These voltages are dearly indicated on the circuit diagrams of series A and B. IN ORDER TO PREVENT SIGNAL FROM ACTING UPON AVC AND AFFECTING ACCURACY OF VOLTAGE MEASUREMENTS, AERIAL AND GROUND LEADS SHOULD BE SHORT CIRCUITED WHILE MAKING MEASUREMENTS. All voltages are to be measured with 119 volts on the primary of the power transformer.
ALIGNING INSTRUCTIONS Dummy Antennae
The following dummy antennae are used in aligning both series A and B and are referred to in the following alignment instructions as "Dummy I", "Dummy 2", and "Dummy 3" Dummy 1: (I.F.)-Consista of a .1 mfd. condenser connected in
series with the external oscillator. Dummy 2: (Broadcast)-Consists of a 200 mmfd. condenser and
a 20 ohm resistor connected in series with each other and in series with the external oscillator. Dummy 3: (Intermediate and Short Wave)-Consists of a .1 mfd. condenser and a 400 ohm resistor connected in series with each other and in series with the external oscillator.
Resonance Indicator: Use as a resonance indicator an output meter connected across the primary of the speaker input transformer, or by means of an adapter between the plate and screen terminals of the type 42 output tube. Maximum deflection of the meter indicates resonance. Use only enough signal to get a readily readable output. A low range output meter or the low scale of a multi-range meter should be used.
ALIGNMENT PROCEDURE SERIES A ONLY The following adjustments to be made after the IF.'s have been aligned as explained above. BROADCAST BAND ALIGNMENT: 1. With wave changing switch in the broadcast position, extreme
left of its rotation, and with external oscillator set at 550 kilocycles and connected in series with "Dummy 2" to the tan antenna and black ground lead, make the following adjustments: (a) Adjust broadcast series pad to resonance with oscillator.
Keep set in tune with oscillator by slowly rocking to and fro the variable condenser until maximum output is obtained. Note: This adjustment is accessible from the top of the chassis and is located between the variable condenser and the electrolytic condenses. See top view. (h) Re-set external oscillator to 1500 K.C., move dial pointer to 1500 K.C. and adjust oscillator (adjustment number 3), R.F. (adjustment number 2) and antenna (adjustment number 1) to resonance. See bottom view for location of these adjustments. (e) Repeat adjustments "a" and "b" until sensitivity is at its maximum. NOTE: IT IS EXTREMELY NECESSARY IN MAKING ALL OF THESE ADJUSTMENTS THAT THE FUNDAMENTAL OSCILLATOR SIGNAL BE TUNED IN AND NOT THE IMAGE FREQUENCY WHICH WILL FALL BELOW THE FUNDAMENTAL.
SHORT WAVE BAND ALIGNMENT: I. With wave changing switch in the short wave position, ex-
treme right of its rotation, and with external oscillator set at 17 megacycles and connected in series with "Dummy 3" to the tan antenna and black ground lead, make the following adjustments:
(a) Move dial pointer to 17 megacycles and adjust short wave oscillator (adjustment number 8), short wave RS'. (adjustment number 7) and abort wave antenna (adjustment
number 6) to resonance. (b) Reset external oscillator to 6 megacycles and pick up
signal by rotating variable condenser and check for sensitivity.
YODEL 777
SERVICE
Series A dc B
Alignment
INTERMEDIATE BAND ALIGNMEN 1 :
I. With wave changing switch in the nest. rim, liatc position center of its rotation, and with external tu-till.,tor set at 5 megacycles and connected in aeries with "lhmmn 3" to the tan antenna and black ground lead, make the following adjustments:
(a) Move dial pointer to 5 megacycles and adjust intermediate wave oscillator (adjustment number 9), intermediate wave R.F. (adjustment number 5) and intermediate antenna (adjustment number 4) to resonance.
(b) Re -set external oscillator to 1800 K.C. and pick up signal by rotating variable condenser and check for sensitivity.
(e) Re-check broadcast sensitivity as outlined under "Broad-
cast Band Alignment".
Series "A" chassis have no intermediate band series oscillator pad adjustment.
ALIGNMENT PROCEDURE SERIES B ONLY The following adjustments to be made after the I.F.'e have been aligned as explained above.
BROADCAST BAND ALIGNMENT:
I. With wave changing switch in the broadcast position, extreme left of its rotation, and with external oscillator set at 600 kilocycles and connected in series with "Dummy 2" to the tart antenna and black ground lead, make the following adjust-
ments:
(a) Adjust broadcast series pad to resonance with oscillator. Keep set in tune with oscillator by slowly rocking to and fro the variable condenser until maximum output is obtained. Note: This adjustment is accessible from the top of the chassis and is located between the variable condenser and the electrolytic condenser. See top view.
(b) Re -set external oscillator to 1400 K.C., move dial pointer
to 1400 K.C. and adjust oscillator (adjustment number
3), R.F. number
(adjustment number 1). to resonance. See
2) and bottom
antenna (adjustment view for location of
these adjustments.
(c) Repeat adjustments "a" and "b" until sensitivity is at its
maximum.
NAMTHLOELETNETOI:AMFLAITGOTHESECISFSILREELEXAQATTUDROEEJRNUMSCSEITYGLMNYWEANHLNTIECBSCHEETTSHWUSAANILTRELYDTFIIHANNELLAMNFBAUDEKNLNIDONOAWGT-
THE FUNDAMENTAL.
SHORT WAVE BAND ALIGNMENT:
1.
With wave changing switch in the short wave position, ext1tr7heemmetaegnriagcahyntctleeonsfniaatnsdarnocdtoantbinolaencc,kteadngdroinuwnaditehrlieeesaxdt,ewrinmtahalk"eoDscutihmlleamtfoyorllos3we"tinutgot
adjustments:
(a)
Move dial pointer to 17 megacycles and adjust oscillator (adjustment number 8), short wave
short R.F.
wave (ad-
justment number 7) and short wave antenna (adjustment
number 6) to resonance.
(b) Re -set external oscillator to 6 megacycles and pick up signal by rotating variable condenser and check for sen-
sitivity.
INTERMEDIATE BAND ALIGNMENT:
1. With wave changing switch in the intermediate wave position, center of its rotation. and with external oscillator set at 1600 K.C. and connected in series with "Dummy 3" to the tan antenna and black ground lead, make the following adjust-
ments:
(at Rotate variable condenser to approximately 1800 K.C., tune in oscillator signal and adjust M.W. eerie@ pad (see
top view) to resonance. Slowly rock condenser to and fro while making this adjustment to be sure maximum output
is obtained.
(b) Set external oscillator at 5 M.C., rotate condenser, pick up signal and adjust intermediate wave R.F. (adjustment number 5), intermediate wave antenna (adjustment number 4) and intermediate wave oscillator (adjustment num-
ber 9) to resonance.
(c)
Re-check broadcast alignment and if it is found necessary to re-adjust either RF. or antenna trimmers, repeat the
17 M.C. short wave and 5 M.C. intermediate wave adjust-
ments.
ALIGNING LF. TRANSFORMERS (465 ILC.)
Seri« A and B. Series A-Part No. 108.35 Output IF. Transformer Series A-Part No. 108-36 Input I.F. Transformer
Series B-Part No. 108-35 Output IF. Transformer
Series B-Part No. 108-36 Input IF. Transformer
These IF. transformers have two adjustments, both of which are
accessible from the underside of chassis (see bottom view).
1. With volume control full on, the extreme right of. its rotation, and with wave changing switch in the broadcast position, extreme left of its rotation, and with variable condenser set to approximately 1400 kilocycles, make the following adjustments:
(a) Connect external oscillator set at 465 kilocycles, in series with "Dummy 1", to the control grid cap of the type 606 tube, located between the two IF. transformers, and adjust the output T.F. transformer to resonance.
(b) With "Dummy 1" still connected, move oscillator output clip from grid of 61I6 to grid cap to 606 and adjust input IF. transformer to resonance.
(r) With oscillator still connected to 6Cß, re-ndjusc output I.F. transformer.
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-4 GOODYEAR MODEL 580
Schematic
Parts List.
6
GOODYEAR SERVICE
Model 580
IR CON
6.
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PART PART PART
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REPAIR PARTS -MOD EL 580
Serial No. 11501 and up
When ordering parts, always specify part and model
number as well as serial number of chassis.
Part No.
Description
101-9
Volume Control with Switch.
List Price Each
$1.35
REMOTE CONTROL PARTS
102.7 104-6 105-3 105-4 106-6 108-32
109.13 110-16 111.21 115-18 116-5 116-14 116ó 119.15 135.5
140á 142-4
145-11 146.1
146-2 147.1 147.11 118.1
Three Gang Geared Variable Condenser ...............-....... Vibrator Transformer
"A" Choke -40T -No. 161-34" Dia. ..... ........ ..... _
4.00
100
.10
380 Ohm Filter Choke
.85
200 Ohm Center Tapped Resistor.....__.._.._. Output I. F. Transformer Complete, leas can and re-
.25
sistor and Condenser Assembly (175 K. C.)
1.75
R. F. Coil
1.00
Ose. Coil & bracket Antenna Coil Special partition shield
.75
LOO .20
6-8 Volt T-50 pilot lamp, screw base
.10
P6i-l8otvolilgthTt -a5s1sefmrobslyte, dcogmlapslesteb,ayleosns ebtublbase lamp
.13 .40
5-4 Mfd. 300 Volt Electrolytic Filter Condenser %x3" carriage bolt
Container complete Plug -In Vibrator
with top
and
bottom
.__
By -Pass Block
Special bracket including cable fittings, but less trol
battery,antenna, pilot antenna coil volume
light con-
2.50 .05 2.50 4.50 .75
.A0
Bushing and bracket complete
.20
Selector Control Coupling Volume control coupling
.10 .10
.5 51íd. Generator Condenser
.50
Part No.
Description
List Price Ea
112-39 Selector Control Shaft
.20
11241 Idler Gear
.15
112.42 Pointer Shaft
.05
112-33 Volume Control Shaft, Key type leas knob
.10
112-85 Volume control shaft less knob
.05
11244 Pointer (Specify White or Black)
.05
112-35 Bezel (Crystal Retainer)
.15
11246 Celluloid Dial Crystal
.15
11248 Pointer Shaft Gear
.05
112-89 Dial
.25
131-5
Black Bakelite remote control knobs
.15
146.8
146.12
146-25 147-3 147-4 149-18 149-24 150-18 150-24
151-7
Die Cast Remote Control Mounting Bracket
.30
Steering Column Strap
.15
Dash Mounting Bracket
15
Selector Control Bushing for 112-39 shaft
10
Volume ('ontrol Bushing for 112-43-112-85 shaft .10
Flexible Volume Control Cable-18" __
1.25
Flexible Volume Control Cable-21" ._
.. 1.50
Flexible Selector ('able-18" .. .
. 1.25
Flexible Selector ('able-24"
1.50
Remote Control Head, less flexible shafts, with pilot
assemblies and with knobs and mounting hard-
ware
490
PILOT LIGHT:
148-3
1.84 118-6
152.1
152-2
152.3
167.1
168.1 168.2 1683
.5 Mf.l. Ammeter Condenser
Dual 3 klfd. x 120 Volt Condenser
Special Ford ignition condenser
Antenna cable
Battery cable
Fuse Insulating Sleeve
Dynamic Speaker
Spark -plug Distributor
type suppressor Universal) plug -type suppressor
...._.._
Cable type suppressor
.40 .75 .60
and
Pilot to
light assembly, the rear of the
part number remote control
116-9, unit
plugs into the set (see illustrations).
.40 .35
r
A
PILOT LEAP
.05
5.01)
SET SCREWs
.30
PILOT LITE,.
.40 .40
ASSEMBLY 4 y
169-1
15 Ampere Fuse 13AG-151
Unless otherwise listed, all Carbon Resistors
.05
20
REMOTE CONTROL
Unless otherwise listed, all Single Section Tubular
Paper By -Pass Condensers
Unless otherwise listed, all Dual Paper By -Pass Condensers
Section
Tubular
Unless otherwise listed, all Molded Mica Condensers
All Sockets
.25
.50 .25 10
-, V6OLKUEMYEKSeeWnI?T. CH
- -SELECTOR KNOB
l'Iate antenna
3.50
@John F. Rider, Publisher
www.americanradiohistory.com
1588881
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IIALLICRAFTERS, INC.
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HALLICRAFFERS PAGE 7-1
MODEL Super Skyrider Schematic
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-2 HALLICR AFTERS
MODEL Super Skyrider A.ignr_ient, Socket Trimmers
HALLICRA VEERS, INC.
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HALI,ICRAh" l'ERS, INC.
HAI.I.I('RAP'TI:RS I'.1(iI'. 7-:i
IOD S8A
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HAMMARLUND PAGE 7-5
HAAí1IARLLIND MFG. CO., INC.
MODEL Super Pro Alignment,Part 1
VOLTAGES:-
ALL MEASUREMENT! WERE MADE ON A IRO VOLT A.C. POWER SUPPLY LIME WITH LIME VOLTAGE ADJUSTMENT SET AT THE 125 VOLT TAP. R.F.I.F. AND AUDIO GAIN CONTROLS SHOULD BE SET AT MINIMUM. THE A.V.C. MANUAL SWITCH SHOULD BE IN THE MANUAL POSITION, THE CW-MOD SWITCH IN THE C.W. POSITION, AND THE "SEND -RECEIVE" SWITCH IN THE RECEIVE POSITION. D.C. VOLTAGE READINGS WERE OBTAINED WITH A VOLTMETER HAVING A RESISTANCE OF 1000 OHMS PER VOLT USING THE CHASSIS AS A COMMON TERMINAL. VOLTAGES WITHIN t 1O7 OF THE VALUES GIVEN SHOULD BE CONSIDERED SATISFACTORY. THE 6.3 VOLT A.C. FILAMENT READING IS OBTAINED BETWEEN CHASSIS AND TERMINAL N+ 2 ON STRIP. TERMINAL N. 10 ON STRIP IS BLANK EXCEPT WHEN USED FOR BATTERY OPERATION IN WHICH CASE IT PROVIDES A SHORT TO CHASSIS WITH POWER SWITCH IN 'ON' POSITIRN AND OPEN WHEN POWER SWITCH IS IN THE 'OFF' POSITION.
1 - TEST OSCILLATOR - An accurately calibrated instrument producing modulated signals covering a range of 465 K.C. to 20 Y.C. This test oscillator should have an output of the order of 100 micro -volts and an output impedance of 100 Ohms for beat results when aligning the R.F. and H.F. Oscillator circuits. For I.F. alignment these values are not critical. The frequency calibration of the test oscillator is extremely important, if the receiver alignment is to be correct.
2 - OUTPUT METER - This meter should respond to the modulation frequency of the test oscillator and should provide at least half -scale deflection for one volt.
3 - INSULATED SCREW DRIVER (9/64" wide - .025" thick at bit) PRELIMINARY PROCEDURE
Place the "ON-OFF" switch in the "ON" position and allow the receiver to warm up approximately one hour before beginning adjustments. Turn the knurled thumb nuts located on the topa of coil assemblies D.D.-E.E. and H.H. until the tops of the thumb nuts are flush with the tops of the threaded rods. Connect the output meter to the "PHONES" terminals located at the rear of the receiver chassis.
I.F. - A.V.C. - BEAT OSC. ALIGNMENT Adjust the test oscillator to 465 K.C. and connect the output to the control grid of the 1st Detector tube (6A7) through a fixed condenser. Front panel controls should be set as follows:
R.F. Gain Control MINIMUM (turn full left) I.F. Gaio Control MINIMUM (turn full left) A.V.C. - MANUAL switch on "MANUAL" C.W. - M.O.D. - switch on "MOD" PHONES - SPEAKER Switch on "PHONES' SEND -RECEIVE Switch on 'RECEIVE" BAND SWITCH on 540-1160 K.C. AUDIO GAIN CONTROL MAXIMUM (turn full right) TONE CONTROL (turn full lett) SET FCTIVITY (turn full left) BAND SPREAD DIAL set on 100 MAIN TUNING DIAL set near low frequency end of scale, being careful not to conflict with a powerful local signal. Adjust the I.F. gain control so that a reading of approximately one volt is obtained on the output meter. As the various circuits are adjusted for resonance reduce the I.F. gain control to prevent overloading. Adjust the two trimmer capacitors in each of the following coil assemblies for peak voltage readings on the output meter - A.A. - B.B. - C.C. - D.D. - E.E. Then adjust the trimmer capacitor on coil assembly C.C. to minimum (dip) reading on the output meter. Now reduce the A.F. gaia to nearly zero and throw the A.V.C. switch to A.V.C. Then adjust the I.F. gain Control until the panel meter reads between 2 and 3. Then adjust the capacitors on N.H. for minimum panel meter reading. There should be a pronounced dip of the panel meter as each of these adjustments is made. It is advisable to switch over to "SPEAKER" at frequent intervals during alignment to make sure there is no overloading. If everything is operating properly the output meter reading will also dip to minimum as the capacitors on coil assembly H.H. are adjusted.
Set the A.Y.C.-MANUAL Switch on MANUAL, the C.N.-MOD-awitah on C.N. and adjust the trimmer capacitors on coil assembly F.F. for zero beat. For this adjustment the Beat oscillator control knob, on the front panel
should be adjusted half -way, or with the atop pin on shaft vertical or pointing upward.. This completes the alignment of the I.P. - A.V.C. and Beat Oscillator circuits all of which are accessible on top of the receiver chassis. After these adjustments have been made, the entire procedure should be repeated to insure accuracy. The knurled thumb nuts on coil assemblies D.D. - E.E. and H.N. should now be returned to their original settings by turning them to the right until the tope of the thumb nuts are 7/16" below the tope of the threaded rods.
CRYSTAL FILTER I.F. ALIGNMENT The above procedure for aligning the I.F. circuit also applies to receivers with crystal filters, except that the test oscillator must be accurately set to the frequency of the crystal. This can be accomplished by setting the frequency of the test oscillator (when connected to the grid of the first detector) for maximum response with the crystal in circuit and the crystal selectivity control set at maximum. When the frequency of the test oscillator has been correctly adjusted to that of the crystal the I.F. circuits can be tuned as described above with the crystal cut out of circuit. Unless this procedure is carefully carried out, maximum crystal efficiency will not be obtained, since the peak of the I.F. selectivity curve must coincide exactly with the resonant peak of the
crystal.
H.F. OSCILLATOR AND R.F. ALIGNMENT
Connect the output of the test oscillator to the "A.A." terminal
strip. Keep the output meter in the same position as previous test. The
controls on the front panel should be set as follows:
Band Change Switch on 540 - 1160 K.C.
Rain Tuning Dial on 1100 K.C.
Band spread Dial on 100
R.F. Gain Control "Full On. I.F. Gain Control "To Produce appropriate output meter reading" Audio Gain Control "Full On" Tone Control "Turn Full left" C.W. - MOD switch on "MOD" A.V.C.-MANUAL Switch on "MANUAL" SEND - RECEIVE Switch on "RECEIVE"
PHONES-SPEAKER Switch on "PHONES" Turn the receiver over, bottom side up, placing a email block of wood under the rear of the switch section to protect the shield cans and tubes. The main tuning unit bottom plate should remain in place while H.F. oscillator and R.F. adjustments are being made. In order to facilitate the alignment of these stages, we have indicated in dotted lines, the coil positions beneath the bottom cover plate, to-gather with all capacity and inductance adjusters. Capacity adjusting condensers are located on the coil bases and inductance adjusters extend through the top of each coil. The coil markings correspond to the designations on the schematic wiring diagram. Set the test oscillator to produce a 1100 K.C. signal. Adjust the trisser capacitor "Y" until a peak reading is obtained in the output meter. Now set the main tuning condenser dial to 600 K.C. and ad-
just the test oscillator for a 600 K.C. signal. Turn the inductance ad-
justment on coil "Y" for a peak reading on the output meter. As these two adjustments react on each other it will be neceesary to repeat them until no further change in either capacity or inductance is necessary. This realignment should only be done after making sure that the calibra-
tion of main dial is incorrect. Turo the main tuning dial to 1100 K.C. and set the test oscillator
for 1100 K.C. signal. Adjust each capacitor on coil "R" - "K" - "E2" in
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-6 HAMMARLUND
L`ODII, Super Pro Alignment,Part 2 Socket, Chassis
HAMMARLUND MFG. CO., INC.
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HAMMARLUND PAGE 7-7
HAMMARLUND MFG. CO., INC.
MODEL Super Pro Circuit Data Operating Notes
OPERATING THE RECEIVER
The receiver may now be operated by tuning the OFF-ON SWITCH.
The receiver is equipped with every conceivable control to permit the operator to obtain maximum performance under a wide variety of receiving conditions. The numerous control knobs and switches appearing on the panel, may, at first glance. seem confusing, but in reality their actual manipulation is quite simple and after the receiver has been used for a very short time, no difficulty will be experienced in obtaining the most efficient results.
An AVC-MANUAL switch ie provided to enable the operator to use either AVC or MANUAL volume control. For stations transmitting a continuous carrier euch as a telephone station, the AVC position is generally the beet. In this case, the manual I.F. gain control serves to limit the maximum sensitivity and prevents the high noise level present when the receiver is adjusted to maximum gain with no incoming signal. When the switch is set on MANUAL, the I.F. GAIN control adjusts the gain of the receiver to a given point, which remains fixed regardless of the intensity of the signal being received. When AVC is used a minimum reading on the TUNING METER indicate. the signal has been tuned in properly.
The BEAT OSCILLATOR adjustment is brought out on the panel and may be adjusted to give any beat note frequency desired. For C.W. reception, be sure that the signal is tuned to its maximum strength, and then adjust the beat oscillator to the desired frequency.
DO NOT CHANGE THE TUNING TO PRODUCE THE DESIRED BEAT FREQUENCY. The only time the tuning is adjusted to change the beat frequency is after the station is properly tuned in, and has drifted in frequency so as to change the tuning as well as the beat note.
The BEAT OSCILLATOR may also be used for locating the carrier of distant broadcast or phone signals by tuning to the lowest pitch beat note (Zero Beat) with the CW-MOD. switch in the CW position. For this purpose the BEAT OSCILLATOR control should be adjusted in the centre.
A SEND RECEIVE switch ie placed on the panel and ie used when transmitting on approximately the same frequency as that to which the receiver is tuned. This switch disconnects the plate supply to the R.F. amplifiers and first detector. With this switch in the send position, it is usually possible to use the receiver to monitor the transmissions, although in low powered transmitters it may be necessary to keep this switch in the receive position and reduce the R.F. GAIN, as the shielding and filtering in the receiver is sufficient to keep out any except extremely strong signals from a transmitter located a few feet away.
The frequency band desired for operation may be selected by means of the BAND CHANGE SWITCH located directly beneath the tuning meter. The main tuning dial shutter will at the same time automatically indicate the frequency band, in use. The calibration of the MAIN DIAL is correct only when the BAND SPREAD DIAL is set at 100, except in the two low-frequency ranges from 540 to 2500 K.C. In these two ranges the BAND SPREAD CONDENSER is automatically disconnected by the BAND CHANGE SWITCH. Therefore, with the BAND SPREAD DIAL set at 100, the receiver is a fully calibrated SINGLE DIAL instrument.
In the three high frequency bands tuning is sufficiently smooth on the main dial to permit its use almost entirely for selecting the desired signal and perhaps it would be more simple to disregard the band spread dial until the desired signal is picked up, and then use the band spread dial for the purpose of obtaining a very fine vernier adjustment.
If band spread operation is desired in any of the three high frequency bands, the MAIN TUNING DIAL should be adjusted to the HIGH FREQUENCY limit of the band desired. It will then be possible to tune down over the band by means of the band spread dial only, thereby permitting extresely fine tuning. Lower BAND SPREAD DIAL settings indicate lower frequencies.
THE BAND SPREAD DIAL is not used on the two lowest frequency bands, as the tuning is sufficiently fine on the main tuning dial. GAIN ADJUSTMENTS:
The R.F. GAIN CONTROL will generally be at maximum, unless the signal being received is very strong, and causes overloading of the first detector. This overloading will be made apparent by a considerable amount of distortion. In this case, reduce the R.F. GAIN. This overloading will rarely be present on the high frequency bands, where the maximum R.F. gain he generally desired.
The AUDIO GAIN should be operated at or near its maximum setting, except when using A.V.C. The AUDIO GAIN should be full on at all times when the receiver is being used for C.W. reception except when using A.Y.C. and the proper signal level obtained by the manipulation of the I.F. gain.
In C.W. reception, it will sometimes be found advantageous to reduce the R.F. GAIN when there is interference from a strong station operating very close to the desired signal.
The SELECTIVITY adjustment may be set at any desired point, de-
pending upon conditions. For C.W. reception, it ie usually desirable
to adjust for maximum selectivity. It should be borne in mind at all
times
that
the
atmospheric disturbances
and other
noises
of
that
char -
actor will vary in direct proportion to the width of the response
curve of the receiver.
If the receiver becomes completely inoperative, it may be due to a shorted filter or by-pass condenser or an open resistor. By measuring voltages and comparing them with the tabulations in the chart, the defective parte can be easily determined. We do not believe that detailed continuity tests should be described since most operators are familiar with the ordinary procedure for determining defective component parts. In both receiver and power supply units, the bottom cover plates may be removed no that all parts are accessible. Values of any resistor or capacitor may be obtained by locating the number on the schematic wiring diagram, and referring to the parts list.
GENERAL DESCRIPTION
- The receiver consists of two major unite
the receiver proper
and the power supply unit. Both units are supplied with duet covers
and suitable for rack or table mounting.
The main tuning unit houses the MAIN TUNING and BAND SPREAD con-
- densers and their respective dial assemblies
the BAND CHANGE SWITCH
- - and all ANTENNA COUPLING
R.F. and H.F. OSCILLATOR coil assem-
blies. The BAND CHANGE switch, an exclusive Hamarlund development,
embodies the well known knife switch principle and is located in the
center of the unit. In the development. of this switch, which presents
a radical departure from switches commonly used for band changing,
considerable thought was given to efficient operation over long peri-
ods of active use. and the elimination of faulty switch contacts.
which would affect the sensitivity and selectivity of the receiver.
All contacts are silver plated phosphor bronze so constructed that a
six point contact is provided at each connection. This switch covers
the range of 20 mc. to 540 kc. in 5 bands, and also connects the prop-
er band spread condensers into each of the 3 high frequency circuits.
and short circuits all coils not actually in use. When the switch is turned the next contact is made before the previous one is broken, thereby eliminating sparking. The switch dial may be turned in either direction, a very convenient feature.
The MAIN TUNING and BAND SPREAD condenser assemblies are located on the left and right hand side respectively of the BAND CHANGE SWITCH when facing the panel. Each tuning gang is controlled by a single control and dial located on the front panel. They are rigidly constructed and so designed that they will not get out of alignment during normal operation.
The MAIN TUNING and BAND SPREAD DIALS are plainly readable through well illuminated escutcheons. Both dials have an easy vernier tuning action without backlash. The main tuning dial is directly calibrated in megacycles in ranges of 2.5 to 5.0; 5.0 to 10.0; 10.0 to 20.0; and in kilocyclee from 1160 to 2500 and 540 to 1160. The MAIN TUNING DIAL is equipped with an ingenious mechanical shutter which operates in synchrony with the BAND CHANGE SWITCH, so that only the frequency band in actual use is visible to the operator.
The POWER SUPPLY unit contains a properly filtered rectifier for furnishing D.C. plate voltages and A.C. filament voltage for operating the receiver. A separate rectifier is incorporated for supplying grid bias. All component parts are designed to have a high safety factor. A three terminal strip is located beneath the chassis to permit operation on power supply lines of 105 - 115 - 125 volts. 50-60 cycle alternating current. A cord and plug is provided for connecting the power unit to a wall outlet or receptacle. A connecting cable is furnished for connecting the receiver and power supply units. A special cable for emergency battery operation is also provided.
CONNECTING RECEIVER
The receiver is so designed that it may be located in any convenient position. as a table model or in a standard 19" telephone relay rack. Dust covers may be removed for the insertion of tubes by removing the thumb nute on both receiver and power supply units.
Tubes:- The receiver has been designed and tested for the following R.C.A. tubes or their equivalent: -
5 - 6D6 2 - 6C6 1 - 6A7 2 - 687 1 - 76 3 - 42
Receiver
1 - 5Z3 1 - 1-V
Power supply
Care should be taken that the proper tube is inserted in each socket. The type numbers on the tubes should correspond with the
markings on the sockets. After the tubes have been correctly inserted the dust covers may be replaced.
The receiver may now be placed in the location previously decided upon and the antenna connections made. The antenna input has been
designed to couple either to a balanced transmission line having an impedence of approximately 300 ohms, or to a conventional single wire antenna and ground. In the former case both feeders should be connect-
ed to the two antenna terminals located at the rear of the receiver marked "A -A". If a single wire type of antenna is used the lead-in should be connected to one of the terminals marked "A" and the other
"A" terminal connected to a good ground. It is not essential to ground the receiver chassis, but it may readily be accomplished by inserting a ground lead under one of the thumb screws holding the dust
cover in place at the rear of the receiver.
The RECEIVER and POWER SUPPLY units are connected by a cable. The spade lugs on the terminal strips at each end of the cable should be inserted in the corresponding terminals of the receiver and power supply, with the spade luge pointing downward.
The output connections to the receiver may be made to the termi:.als marked "SPEA!®t" on the rear of the receiver chassis, or to the pin jacks marked "PHONES". The output of the receiver has been designed to match a load impedente of approximately 600 ohms. A PHONE JACK is provided on the front panel of the receiver connected in parallel to the 600 ohm output terminals.
With the OFF -ON SWITCH in the OFF position, plug the power supply
cycle alternating rrent
TOco rOPERATE ONO DIRECT
ORU
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OOTTERTHAANNE]IPT
5G-60 CYCLES OF THE PROPER VOLTAGE, unless the power supply unit is
marked for 25-40 cycle A.C. operation.
An extra Connecting cord is supplied with each receiver for emergency battery operation. One end of this cord has a terminal strip that connects to the receiver and the other end has color coded wires for battery connections. The following batteries are required
for emergency operation:-
5 - 45 volt "B" batteries 1 - 45 volt "C" battery 1 - 6 volt "A" storage battery.
üJohn F. Rider, Publisher
www.americanradiohistory.com
e
www.americanradiohistory.com
IIF.'l'ltO EI.h:C'l'ItICAI, INI)i'S'l'RIk:S
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MODELS F-13 to F-20 incl.
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MODELS F-21 to
F-28 incl.
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www.americanradiohistory.com
PAGE 7-4 HETRO
MODEL 293
Series V
Sc hemati c MODEL Air -Ace
Series M
Change s
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4 TUBE T.R.F.
Compact
A.C. -D. C.
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200 to 550 Meters
CONDENSERS VOLTS
Cl .01
400 v.
C2 .00037 Variable
RS
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200 v.
C4 .25
2525
C5 .00025 mica
C6 .01
400 v.
C7 .05 C8 12.0 C9 16.0
2i0f 0 Part -#2023
RESISTANCES WATTS
R1 25000 ohm variable 200 fixed
P2 2.000,000 1/3 watt
P3 500.000 n
P4 250.000
P5
100
R6
40
Part FH -40
R7
135 Service cord & plug,
R8 1.000,000 1/3 watt
4CMÒKE
v.
DIAL6L.IGHTS
Part No. 682
135 .-
MODEL 293
Series V
REPLA CEMENT PARTS
Speaker Part 4EX2117
F ilter Choke Part 471341
Dial bulb Part 413
Antena Coil Part A1015 R.F. Coil Part #B1049 Vol cont & switch 4329
Tubes; 2575, 6D6, 6C6, 43
Adaptor for 220-240 volts operation #319.
Several changes have been made in the 9 -tube receiver, whose schematic is shown on Hetro page 6-15 of Rider's Volume VI. The tube complement has been changed and is now as follows:
New Tube Old Tube
Position
6K7
6D6
R.F.
6A8
6A7
Mixer-Osc.
6K7
6D6
1st -2nd I.F.
6R7
85
2nd Det.
6C5
76
A.F.
6B5
42
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80
Rect.
Note. On models using glass tubes
only, the 6A7 is used instead of the 6A8. A new power transformer is used,
Part No. P-836, instead of No. T-789.
The connections for this are shown in the accompanying sketch.
The resistor, R-7, in the cathode circuit of the output tubes,. has been changed from 600 ohms to 250 ohms and is now known as R-17. The resistor, R-8, 700 ohms, in the cathode circuits of the i-f. tubes, has been changed to 250 ohms and is the same
Hetro Air -Ace, Series M
as R-1. Also the second i-f. tube cathode is no longer connected to the condenser C-2 and R-1, which was connected to the cathode of the first i -f. tube, but a condenser and resistor similar to C-2 and R-1, connects it to
figifigMliffUlfen
START //7V. /30V. 220V. 250V. A.C. PRIMARY INPUT TAPS 40-60 CYCLES
Lt ti 0.3 V. F/L .
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Terminals for power transformer used in Hetro Air Ace, Series M.
ground. The condenser, C-2, in the secondary circuit of the second i -f. transformer, has been eliminated and the secondary is now directly connected to ground, instead of R-2.
The input transformer to the output stage has been removed and a tapped
a -f. choke substituted tor it. The center tap is grounded, as was the secondary of the transformer formerly used, and each end goes to the grid of the 6B5 tubes. A 0.05-mf. condenser, C-4, re-
places C-14, 0.1 mf., in the plate circuit of the 6C5.
The two condensers, C-15, 0.004 mf., have been removed from across the primary of the output transformer and one of them has been connected from the plate of the 6R7 to ground. The tone control, C-4 and R-15, has been moved from across the plates of the output tubes to the plate circuit of the 6R7. One side of C-4 is connected to the plate and the other side to one end of R-15. The arm of this resistor is connected to the junction of C-11 and R-11, which is grounded. R-15 has been changed to 500,000 ohms instead of 40,000 ohms and R-11 has been changed to 1500 ohms from 5000 ohms. R-14 in the cathode circuit of the 6C5 has been changed to 3000 ohms from 6000.
©John F. Rider, Publisher
www.americanradiohistory.com
HERBERT H. HORN
HORN PAGE 7-1
MODEL 5A MODEL 66MT
Schematics
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©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-2 HORN
MODEL 5MTD MODEL 7MT Schematics
HERBERT H. HORN
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www.americanradiohistory.com
i
HERBERT H. HORN
HORN PAG? 7-3
MODELS 911T,9MTC
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MODEL 10MT MODEL 76 Schematics
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www.americanradiohistory.com
HERBERT H. HORN
HORN PAGE 7-5
MODEL 17 MT Schematic
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©John F. Rider, Publisher
www.americanradiohistory.com
I'AGE 7-6 HORN
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www.americanradiohistory.com
HORN PAGE 7-7
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www.americanradiohistory.com
PAGE 7-8 HORN
MODEL 63 MODEL 83 Schematics
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www.americanradiohistory.com
PAGE 7-2 HOWARD
MODEL Grand Series 2 Socket, Trirmiers Alignment
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ALIGhlTNT OF THE OSCILLATOR All) R.F. CIRCUITS
put of the signal generator a signal should be heard which will be an indication that the
original adjustment has been made on the correct
»MTN= SERVICIN`.G
NECESSARY
The following alignment instructions are given with the
1.
frequency. Set band switch to 2nd (or highest frequency) band.
assumption that the service station has a signal generator capable of accurately oovering the range of the receiver.
Set dial hand to 15 Y.C. and adjust trimmer "C" to 15 M.C. fed into antenna.
A vacuum tube volt meter is preferred to indicate resonance, though an 0 to 3 AC voltmeter Dan be connected across the voice coil
for this purpose.
The two High Fidelity Broad I.F. Stages can not be correct-
ly aligned by the usual methods an a Cathode -Pay oseillogrnph is
2.
required to visually show the resonance curve. Since these stages
are broad, they are sot liable to get out of adjustment easily after
they have once been set, so they should not require any attention
unless a replacement has been made of one of the coil units.
Refer to diagram for location of various trimmers. ALIGNING TI -:E I.F. STAGES
The alignment of the Broad l.F. Channel has been mentioned
above. On some sets the triers extend through top of can. Also
the last stage has a tuned primary.
3.
The regular selective I.F. stages are coded "A" on the diagram and are aligned in the usual manner of feeding the 465 K.C. signal into the grid of the 78 Mixer Tube.
The trimmers should be very carefully tuned to resonance ae they are very critical and will greatly affect the performance of the
receiver.
The sensitivity of the I.F. stages should be between 25 and
50 Microvolts.
NOTE REFORM, ALIGNING OSCILLATOR AND RF CIRCUITS
4.
Align the I.F. Stages first.
(b; Always adjust oscillator stage before the R.F.
in any particular band.
(o) Before aligning be sure dial pointer is set
exactly on tie 180 degree line which is the
line straight across the middle of the dial
with tuning condenser in full maximum position.
(d) Bend the plates on the oscillator section only
5.
and only on the broadcast band if necessary.
(e) Seal trissera with wax. (f) After the high frequency adjustments have been
made on short wave bands, a check may be made
by advancing the signal generator to 930 K.C.
higher in frequency, whiob is the image of the
6.
Align R.F. Circuit trimmers "D", "E" and "K" same frequency.
Now set dial hand to 6 Y.C. on same band and adjust padding condenser "F" tc resonance.
Set band switoh to next short wave band -- 5.5 to 1.7 Y.C.
to Rotate dial hand to 5.5 Y.C. and adjust trimmer "G"
5.5
U.C. signal.
Align R.F. circuit trimmers "H" and "I" to same frequency.
Rotate dial to 1.7 Y.C. on same band and adjust padding eon denser "J" to resonance.
Set band switch to Broadcast position.
With dial hand at 1500 K.C. peak trimmer "L" to resonance.
Peak R.F. Trimmers "b"' and "N" to 1500 K.C.
Rotate dial hand to 550 and adjust padding condenser "0" to 550 K.C.
Check dial at 950 to R.C. and bend oscillator plates if necessary at any point to align with calibration of dial.
The long wave band is aligned with the band switch set on that band and trimmer "P" adjusted to 390 R.C. will dial
hand at 390 K.C.
Adjust R.F. circuits with trimmers "Q" and "R".
Rotate dial to 150 A.C. and align padding condenser "S" to resonance.
Beat Oscillator Adjustment
Set dial to sane frequency, for example --- 7 Y.C. and adjust
trimmer "T" until note is heard.
The Whistle Trap
Located in the amplifier is the high frequency choke with its trimmer, Which has been peaked to 10.000 R.C. at factory,
©John F. Rider, Publisher
www.americanradiohistory.com
HOWARD RAI)I() CO.
465 KC /^I/"
L9
uto .0003
02-400v
1,13
HOWARD l':1GN. 7-3
MODEL HA -6 Early Schematic
Parts List
r-
? . V/88A70R
1
TD2-2006
ANTENNA CORRECTOR
/100 P)MM
SOCKET VOLraco
(moan two moaal) battery .oltne. 6 1. ]Ldlt 1,14t. Cathode 9 0
606 660 2.4 100
al o
C3
J 6,4/G V COUD
406 200 r V. 100
wl 120
az
16 V. eo
76 100
.97.2072/8.1,7"
Jil
TO ;',07.9
F1Y
-41 /J AMP. FUSE
BELOW SER/AL 2000
\I
R9
W /OM
N
12^"D25, E
F/L R CNOYfF L J
IJC°Y-Y°^ Wune IBN/T/ON F/LTER
4>4,
'-PO-W-E-H-U-N/-TJ
D2 400v
,4av/Dá, A 1,
1- s
/00M TONE- CONTROL
Jnt
' 66ò Q6"ööl
A,e.war1 NR -D4 -7/J ^h .0w'SAOvtO- 74^
REPLACEMENT PARTS LIST
WHEN ORDERING, USE PART NO. AND DESCRIPTION SHOWN ON THIS LIST REGARDLESS OF NUMBER PRINTED ON PART ITSELF. FOR ALL
ORDERS OR COMMUNICATIONS REGARDING THIS RECEIVER ALSO MENTION CHASSIS HA6. PRICES SUBJECT TO CHANGE
Schematic Part Na. Location
Description
Schematic List Price Part No. Location
WITHOUT NOTICE
Descriptfon
List Price
7801 5800 S6:42 5530A c,633 5531 5534 4302 8523 8524 8525 8526 8527 8528 8529 8530 8531 8532 8121 8223 8224
8825 8823
L11 L1 LL
1.3
L4 L5
1.8
L7 L8 L9 L10 Cl C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 025 C26
8228
R18
6225
R19
4668
6103
6102
5717
3415
F1
Bias Cell - 1 Volt Cable - Flexible drive with fittings Cable - Antenna Cable - 'A' Battery with fuse holder Cable - Battery and B + lead (inside set) Short 'A' lead (extendink from set) Long 'A' lead (extending from drive head) Choke - filter (power unit) Coll - Antenna, complete assembly Coil - Mixer, complete assembly Coll - Oscillator, complete assembly Coil - Antenna input' choke Coll - Filament choke Coil - Ignition choke Coll - Vibrator primary choke Coil - B-+ Choke Coil - lat. I.F. Assembly Coil - 2nd. I.F. Assembly Condenser - variable tuning Condenser - Padding 2 stud mounting Condenser - Padding, single mounting Condenser - .1 Mid - 400 volt Condenser - .5 Mid - 50 volt (power unit) Condenser - .5 Mfd - 120 volt Condenser - .5 Mfd - 50 volt Condenser - .02 Mid - 200 volt Condenser - .02 Mfd - 400 volt Condenser - .05 Mfd - 200 volt Condenser - .05 Mfd - 400 volt Condenser - .005 Mid - 1600 volt
Condenser - .006 Mid - 400 volt
Condenser - .0015 Mica Condenser - .0003 Mlca Condenser - .0005 Mica Condenser - Dual 8 Mfd. - 350 volt Condenser - 12 Mfd. - 25 volt Condenser - .5 Mfd. - 200 volt (can Type for
Generator)
Control - volume Control - tone Coupling - insacup on veri. cond. Coupling - male for wire leads Coupling - female for wire leads Dial Card - calibrated Dial Plate Fuse - 15 ampere
.20 .65 .50 .50
.32
.25
.60
.92
.85 .85 .85 .85 .85 .95 .85
.85
1.30 1.30 3.50
.28
.28
.20
.40 .40
.36
.16
.20
.16
.20
.36
.20
.16
.16
.12 1.80
.60
.40 .80
.75
.12
.20 .20 .28 1.15
.30
7904 460 8012 7809 7109 7110 4106 6420 9006 758 8521 742 882 855 641e 4866 4889 820 '6421 7064
3366
4182 4018 2748 6008 2745 2744A 8003 6014 8917 4321 4202 8331 6632 9600 3980
R1 R2 R3
R4 R5 R6 R7 R8 R9 R10 R12
R13 R14 R16 016 R17
T2 T1
Fuse - insulating tube Grid cap - large Grid cap - metal tube Grommet - Large rubber - 1/2' ID Knob - volume control 0 switch Knob - large control Lamp - 6 volt pilor - bayonet type Mounting Studs for Mtg. plate Nuts for above Nut - thumb, round, knurled (Dower unit) #8 P.K. Screw - hex head 1/4' long #8 P.K. Screw - hex head 3/8' long #8 P.K. Screw - hex head 1/4' long 8-32 Headless set screw 1/8' long (couplings) Cover Screw (Power Unit) Cable anchor bushing (var. condenser) Cable anchor bushing (volume control) #8 Washer 1/2' OD Wing screw - 5/18 - 18 x 3/8' long Wing screw Washer Resistor - 100 ohm 1/3 Watt -Moulded bakelite Resistor - 300 ohm 1/3 Watt -Moulded bakelite Resistor - 500 ohm 1/3 Watt - Moulded bakelite Resistor - 500 ohm 1/2 Watt - Wirewound Resistor - 2000 ohm 1/3 Watt -Moulded bakelite Resistor - 10M ohm 1/3 Watt -Moulded bakelite Resistor - 10M ohm 1 Watt -Moulded bakelite Resistor - 291 ohm 1/3 Watt -Moulded bakelite Resistor - 200M ohm 1/3 Watt -Moulded bakelite Resistor - 5006 ohm 1/3 Watt -Moulded bakelite Resistor - 1 megohm 1/3 Watt -Moulded bakelite Resistor - 156 ohm (Distributor suppressor) Remote control head (for under -dash mounting) Worm drive - replacement unit (var. cond.) Socket - 6 prong Socket - 8 prong Socket - 5 prong Socket - 4 prong - phenolic Socket - 3 prong - antenna Socket - vibrator Speaker - 6 inch. Speaker transformer - Specify if Jensen or Rola Transformer - power Tube Shield assembly Tube Shield ground olip Vibrator - (synchronous) Main Mounting Plate
.04 .04 .04 .04
.80
.80 .12 .12 .12 .04 .04
.04
.04
.04 .12 .08
.08
.04
.08
.05
.12
.12
.12
.15 .12 .12 .18 .12
.12
.12
.12
.25
6.50
1.40
.14
.18
.14
.25
.08
.12 4.50
1.80 2.50
.25
.16
3.30
2.50
O John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-4 HOWARD
MODEL HA -6 Early Alignment,Notes Socket, Trimmers
HOWARD RADIO CO.
ALIGNMENT PROOEDURF
SERVICE FIRST AI
EVERY GOOD SERVICEMAN CHECKS riDEP AND THE ANTENVA SYSTEM FIRST.
EBF:N.MTNANI
Output Meter Connections (Copper Oxide Type Meter) . . Across voice coil
Output Meter reading to indicate 1 Watt output
1.73 Volte
Average eeneitivity in microvolts for 1 Watt output . . See chart below
Generator ground lead connection
Receiver Chassis
Dumpy antenna value in series with generator output lead See chart below
Connection of generator output lead
See chart below
Poeltion of volume control Position of tone control Poeltion of dial card at Maximum Capacity
Full on OFF (or treble position)
Max. Setting line
RAND
POSITION OF GGIRATOR DUMMY GENERATOR TRIMMERS
MICRO-
RANIE DIAL POINTER FREQUENCY ANTENNA CONNECTION ADJUSTED VOLTS
(in order sham)
I.F.Stegee
540 KC
485 KC .1 Mf5. Trans Grid C31 C32
1000
C33 C34
Regular
1400 KC
1400 KC .0002 Ant. Lead C36 C36 C37
2
Regular
800 KC
600 KC .0002 Ant. Lead C4 C5
2
IMPORTANT ALIGNMENT NOTES
1. After adjusting the C4 oscillator padding conden-
ser at 600 KC rotate dial back to 1400 KC and recheck the set-
tings made on (35, 038, C37.
DEFECT
QUALITY POGI
DEAD RECEIVER
LEI vows
IODEITIVE
AUDIO coml./TIa
OR BOWL
RADIO FROMM « nedILLATIoN
GENERALLY CAUSED BY
RERUN
After Checking Voltage, Tubes and
Vibrator; Coe«k .02 condenser in the plate circuit of the 76 tube which any be open
Speaker Cone off center
Blown Mias.Defeotive Off -On Switch,
Open Voice Coil or Speaker Transtorear
Defective Vibrator, Blown CoMmeer, Open Coil Minding
Poor Antenna System, Receiver not
aligned, Speaker Plald Coil snorted
9m. I.F. Transformer having lost Its gaindueto the softening of the
war and the shifting of the iron Coro coupling
Poeeiala open .004 in place circuit of 42
variable Condenser not floating
treely in its rubber mountings
Open ca bypase condenser .1 Mfd. 400 volt in B - Circuit
The grid lead between themloar cube
01.7 and the variable condenser may be too sloe., to the Antenna Stags
of the variable 000d.eeer (Top Section)
Change If necessary
Adfuet or orange speaker
(heck Check 'B' Voltage
Check
Gunge to new type 1.F. (A 0542 on can)
Cnenge If ceceeeary Free Condenser Change
Push lead amp
2. It will not be necessary to bend the plates of the variable condenser for alignment on other points on the dial.
OFT CALIBRATION
Bet not properly alined
Dial hand not set to maximum line when condenser is at full capacity
risk Reset sere on back of drive head
3. It should be noted that after the receiver le installed in a car that it le not necessary, when preparing to align the set, to remove the control head and cables from the dash. There is a dial card on the variable condenser that will indicate the alignment frequencies and settings.
GENFAAL INFORMATION
To examine this receiver for any reason first remove the two screws
holding the cover. The speaker which Se mounted on this cover will be removed
at the some time allowing further inspection of the tubes and radio. The
radio, being designed Sn two parte, having a pair of wire connectors from the
chassie itself to the self contained Dower unit, can be removed from the cale
by first taking out the Dower unit.
The power unit has been very carefully designed to avoid any vibra-
tor 'Hash' from being picked up. Due to the exceptional sensitivity of the radio this interference muet be kept at a minimum and it ie advisable that the cover on the parer unit be making good contact to the box. Tighten the cover by bending the flanges Inward slightly. Also be mure that the .005 Mfd. 1600 Volt condeoeer across the vibrator is not open.
SET NOT SELECTIVE
Cheek Aligoeot,eepecialiy the I.F. stage,.
SLIPPING or THE VOARs
comm. SHAFT
Cable may not be meshed with Blot in Control shaft due to cable not
being tar enough in the coupling, or volume control bracket may be bending back at an angle which dose
not allow the control to met the
shaft clot.
Correct as deeoribed
It is important that the chisels and paner unit make contact to the
incide of the receiver case. In addition it is advisable that the paint be removed from under the various bolt heads on the outeide of the case Dint are
holding Dower unit.
Harmonica of the I.F. may be noticed when the chassie is being serviced outside its case. Trie is a normal condition and will not be present when the set le in actual use.
NOTES ON THE ELIMINATION OE UNUSUAL NOISE CONDITIONS OCCURRING IN THE INSTALLATION IN CERTAIN CARS ARE GIVEN IN SECTION III OF TOE INSTRUCTIONS THAT WERE SENT WITH THE RECEIVER.
Car interference can te fed Into the receiver through the flexible
control cablee, end it is euggeeted that these cables be bonded. Aleo see
page 6 to this instruction book regarding the use of a shield bracket mounted
over the tuning shaft coupling on the set.
& BRACKETAND AS SHOWN IN FIG. 4.
installation In some types of
(Usually inverted mountings) some
receivers may experience extreme loss of eencitivity. If the 2nd I.F. trans-
former (08532 as sham on can) does not respond to alignment, it should be
replaced with a new type. This condition in the I.F. transformer is caused
by the poeition of the iron core being affected by heat generated within the
chassis, and le ueualiy indicated by the softening of the wex within the
transformer. The new type I.F. transformer (Part .68542) eliminates this dif-
u rA stau o22e2o1e1e2m ..ami roe 01116113 messes
ficulty.
WHEN REPLACING THE 2NA.I.F. UNIT FOR THE REASON AS DESCRIBED ABOVE,
IT IS OF COURSE NECESSARY TO READJUST THE TRIIMERS TO 486 KC. WHEN MAKING THE ADJUSTMENT ON THIS UNIT AND LIIEGNISE WHEN RE -TRIMMING THE 1ST. I.F. STAGE BE SURE NOT TO PULL. THE PLATES TOGETHER TOOTIGHT AS THIS MAY BETS THE PLATES
sue WI= 20I122m tent
10111.2121121 [e ser DMA 6016, Lire 002 C0LI110 To 100x6 662 room
II M. 029221 a01.6
PERMANENTLY OUT OF SHAPE AND THEY WILL NOT SPRING BACK WHEN THE SCREW IS TORNEO MINE OTHER DIRECTION. IN THIS EVENT PEAKING OF THE TRIMMERS WOULD NOT BE OBTAINED, AND THE UNIT LAUD HAVE TO BE REPLACED.
ADDITION OF NEW SPECIAL TUNING CABLE SHIELD (3132) TO ELIMINATE EXCESSIVE IGNITION INTERFERENCE. IN MODEL NA8 SERIES 1.
020º1.211 Y6eamY
In Ford 1938 v-8 end other automobiles where an excedsive amount of ignition noise 1a present, the bracket described should be used in conjunction with a new type of shield (No. 3132). Both the bracket described and the new type shield described here are necessary for beet noise elldhinatlon. The bracket, and shield need not be ordered for models number above 5000 (series 2).
The new tuning cable shield (3132) will be supplied 'No Charge' togetherwith a screw used to fasten 1t over the tuning cable opening.
4A
FIG1
©John F. Rider, Publisher
www.americanradiohistory.com
HOWARD RADIO CO.
HOWARD PAGE 7-5
MODEL HA-6 Early Installation Data Noise Notes
ATTENTION FORD OWNERS
No distributor suppressor require a special type of
can be used
distributor
on the Ford V8. condenser which
These Modele can be secured
from your local Ford Dealer. This special distributor condenser
- bolts to the frame of
the red wire from the
the distributor and distributor.
the
wire
lead
connect to
VII NON TO OPERATE THE RADIO CONTROLS
- VIII FINAL ADJUSTMENTS
DIAL POINTER ADJOSTmOT
1.
Rotate the station aeleotor knob ooepletee to the pointer 'floor may not be completely around. T01e is
right. nlvml.
When this in Do not fore
done, the
the red selector
knob.
2. ecate the red pointer adjustment sere. as shown in PIg. 9A and turn It with a wall
ras driver until the red pointer in opposite the 01ae 1110. sham in Fig. 9. Whom
this 1e 0One, the rod pointer will indicate. etatlon frequency accurately.
I. ON -OPT swift. a VO.Um1 CONn10.
Turning become
itlhlaelrnaltledco. ntrWoalltkanboobuttoa
theelnriqghtfowriltlubeew. eto
a faint
been
etatinO. When absent free ear, Operation Further rotation to the right 100.0 5. the fore eking the f1na1 desired Miuetaent,
tomay be
vole.
prevented by and to the
etAtion eh0uld
011e and the heated before
lepfutllidngectrheewe.
be tuned in ere
dial will tuning In knob out. it. Beoutlined
in the f011001ng perew eph.
0. STATION Im.CTON Out a CONTROL
ANT®pA 0.14X®
FChtraantg,ingtunaenyinOathweree0k 00attraotll,oninaetrtora
very near to 800 SC on mall screw driver Into
es
the
dial. antenna
S0eecolanndc, erwiethroeu.t
e0own in Figure 10 and turn it either to the left or right until the voles of the station
le at its maximum point.
eel If a signal generator le oaed do not attempt to connect to the meetne of car but Sateen
allow some Nana for signal to radiate (wlld) 0y attaching a
piece of wire to signal
generator output terenale. Attention Se egeln called to Ne fact that a very weak. e0gna1
moat 0e see tor th18 adjustment.
This receiver 0701... The
0111
dial
ftiogruereInwiethatNeen7.31o0pe*rafltiitntgedo,n
frs@molee from 560 to 1500 kiloindicate Case. frequencies. Ae the
IX -CAUSES AND REMEDIES FOR UNUSUAL NOISE CONDITIONS
station selector control 1e rotated to the left or right, the red pointer on Ne dial
will indleate the frequency of the station teed In. (Rafe. to Peers 9) The correct
'tuned in. spot for any station on no wish 10 heard on either side.
Me
dial le
the
point
of
clearoet
reception where
Any lgnitlon la tuned N. receiver is
noise that might realm will always be more nottCaeble when no
Th10 1e due to exceptionally
tie
good.
foot that the 8eneitivtty
automate volume control feature
automatically became greater
station
of the
when no
etet000 to heard.
X, Nia CeIeO.
TIM tooled íh00 acres le In poeltion to glus the moat brilliant reproduction when
turned 001pletely to
brilliant and more
Ne right. allah. This
When turned toward
Wield he adjated
Ne to
lett the reproduction 1s lees the Mete of the person wing
Ne radie. Lase interference will be experienced ohm in the mallow Beattie.
alaIse IF Tee INSTALLATION OF T®
SOPPRESSO! mummer AS 01001 IN SECTION 6 DOES
NOT ®OVE OBJECTIONABLE NOISE TES FOLLOWING IMES BAY 9E or ASSISTANCE,
1. Spark pressor.
aprelugrateeudpparot .s1o5r,o000asodIleluasntdraatreod
1n Figure available
1. may be neceeeary.
from the retell atore°,
Tases supOr say be
9äó
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John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-6 HOWARD
MODEL HA --G Earl y Parts List Notes
HOWARD RADIO CO.
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John F. Rider, Publisher
www.americanradiohistory.com
HOWARD PAGE 7-7
©John F. Rider, Publisher
www.americanradiohistory.com
PAGE 7-8 HOWARI)
MODEL HA -6
Early
Installation Data
IIOWARD RADIO C O.
{/TN C.9,4S 1../17/1007Av.< /7E7 -.9L TDF', LOOK
FOR LEflO-/N .vT T//ER
COMNER POST.
L E90 -//y
FIGURE -3A
FTAa9me/C
FIG. 2
>,, CNR FRR/er
FIGURE -3
S 0q/7GE BRTTENY
O O O
f Ta cnr/e-re
POSITIVE TERMINAL CONNECTED TO FR/IMI
NO POLARITY ADJUSTMENT NECESSARY WHEN STORAGE BATTERY CONNECTIONS ARE MADE TO CAR AS SHOWN HERE.
CAR WITH GROUNDED NEGATIVE RS
EE
,SHOWN /,EOU/RES POLAR/TyC//HNGE /41,9AD/0:-
COPPER PLATED BOX INSIDE RADIO CASE
PULL CUT AND ROTATE TO THIS SIDE WHEN STORAGE BATTERY IS CONNECTED IN CAR
AS SHOWN ABOVE
A
.LYAfML51 GA/[<
p,UMC[rt eNc carrnel.
PIGURE-ID
FIGUFIE-9
asoM w
AZTJv»..oA>ac.n. FIGURE -SA
NORRPTIND PLATE INSTAL= WITH ,RADIO IN POSITION.
MOUNTING PLATE FOR INSTALLATION IN DRIVERS COMPARTMENT
W/Nñ SC.9EN FI GURC-
FIGURE- 4
Insert Supre es or very close to distributor cep.
FIG. 12
©John F. Rider, Publisher
HII I
www.americanradiohistory.com
ec, 6D6
IIOWARll RAI)IO CO.
VOLUME CONTROL
A2MFD200V 75
HOWARD PAGE 7-9 MODEL HA -G
Late Schematic ,Vol tage
Parts List
s VIBRATOR
R18
sw
I MEG lw
i/ CS
RIO8Mtw
Oº 100V.
5ER/AL NUN/BRS
/JBOVE SOOO
SOCKET .OLT..4'..:;
dtt.p (Token hm Ground)
.olt.ge g Y.
251111.w RIO
PRICES
NOCTIECiAPGE
WITHOUT
FOR REMOTE SPK R VOICE COIL
TO' HOT A
5 RFD 400 V
V 1OM2W. MFD
R19
C14I
WC* 7011111 CON
T
FIÉID
3 OHM `VC.
ILSA=IM_=FU}SE
021
400V
jLNwr
sX
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- - II
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50V.
.S5 MIIFVDOLI
1
SW.
OUTLET FOR
J-- IGNITION FILTER ,
REMOTE SPEAKER FIELD -37_
REPLACEMENT PARTS LIST
OR
WHEN ORDERING, USE PART NO. AND COMMUNICATIONS REGARDING THIS RECEIVER
DESCRIPTION SHOWN ON THIS LIST REGARDLESS ALSO MENTION CHASSIS NO. HÁ62.
OF
NUMBER
Part No.
Schematic Location
Description
List Price
Part No.
Schematic Location
PRINTED ON PART ITSELF. Description
FOR ALL
ORDERS
List Price
4302 L11 8533 L1
8534 L2 8535 L3
8536 8527 8528 8529 8537 8541 8542 8122 8623
L4 L5 L6 L7 L8 L9 010
Cl C2 C3 C4
8224 C5
8225 C27
C6 C7
8826
C8
C9 C11 C12 C13 C14 C10 C15 C16 C17 C18 C19 C20 C21 C23 C24 C25
6227 R18 6225 R19 4668
6103 6102
1
5717 3415 Fl 7904 460 6012 7809 7109 7110 4106
6400
Choke - filter (power unit)
.82
Coil - Antenna, complete as-
sembly
.85
Coil - Mixer, complete assembly .85
Coil - Oscillator, complete as-
sembly
.85
Coil - Antenna filter choke
.85
Coil - Filament choke
.85
Coil - Ignition choke
.85
Coil - Vibrator primary choke
.85
Coil - B e Choke
.85
Coil - 1st. I.F. Assembly
1.30
Coil - 2nd. I.F. Assembly
1.30
Condenser - variable tuning
3.50
Condenser - Padding 2 stud
mounting
.28
Condenser - Padding, single
mounting
.28
Condenser - Padding, single
mounting
.28
Condenser - .1 Condenser - .5
Mfd.-400 volt .20 Mfd.- 50 volt
(power unit)
.40
Condenser - .5 Condenser - .5
Mfd.-120 volt .40 Mfd.- 50 volt .36
Condenser - .02 Mfd.-200 volt .16
Condenser - .02 Mfd.-400 volt .20 Condenser - .05 Mfd.-200 volt .16
Condenser - .05 Mfd.-400 volt .20
Condenser - .005 Mfd.-1600volt .36
Condenser - .006 Mfd.-400 volt .20
Condenser - .0003 Mica
.16
Condenser - .0005 Mica
.12
Condenser - Dual 8 Mfd. 450 volt 1.80
Condenser - .5 Mfd. - 200 volt
(can type for Generator)
.40
Control - volume (with coupling) .90
Control - tone
.75
Coupling - insacup on variable
condenser
.12
Coupling - male for wire leads
.20
Coupling - female for wire leads .20
Dial Card - calibrated
.28
Dial Plate
1.15
Fuse - 15 ampere
.30
Fuse - insulating tube
.04
Grid cap - large
.04
Grid cap - metal tube
.04
Grommet - Large rubber - 1/2" ID .04
Knob - volume control
.60
Knob - tuning
.80
te Lamp - 6 volt pilot - bayonet
.12
Mounting Studs for Mtg. plate
.12
9006 6521
742
882
R1 R2
R3
R5
R4
R7
R8
R9
R10
R12
R13 R14 R15
R16 R17
6017
6018
6016 4180
4018
6015 6020 6019 2745 2746 6008 6014 8918 4322 T2 4203 Tl 6331 6632 9600 3980
Nuts for above
.12
#8 P.K. Screw - hex head 1/4"
long
.04
#8 P.K. Screw - hex head 3/8"
long
.04
*6 P.K. Screw - hex head 1/4"
long
.04
Resistor - 100 ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 300 ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 500 ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 1000 ohml/3 Watt -
Moulded bakelite
.12
Resistor - 2000 ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 10M ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 10M ohm 2 Watt -
Moulded bakelite
.16
Resistor - 25M ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 200M ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 500M ohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 1 megohm 1/3 Watt -
Moulded bakelite
.12
Resistor - 15M ohm (Distributor
suppressor)
.25
Plug and clutch assembly (used
on connectors)
.25
Plug - 3 prong male - (used on
speaker wires)
.25
Plug - (Tipjack with fibre head) .25
Remote control head (for under -
dash mounting)
6.50
Worm drive - replacement unit
(var. cond.)
1.40
Socket - Female, single prong
.12
Socket - 2 prong
.12
Socket - 3 prong (speaker)
.12
Socket - 5 prong
.14
Socket - 6 prong
.14
Socket - 8 prong
.16
Socket - vibrator
.12
Speaker - 6 inch.
4.50
Speaker transformer
1.80
Transformer - power
2.5C
Tube Shield assembly
.25
Tuoe Shield ground clip
.16
Vibrator - (synchronous)
3.30
Main Mounting Plate
2.50
© John F. Rider, Publisher
www.americanradiohistory.com
I .a('TF, 7-10 HOR'ARI?
MODEL HA -6
Late
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www.americanradiohistory.com
HOWARD HADIO CO.
HOWARD PAGE 7-11
MODE 47-A
MODEL 50 MODEL 50 -SW Schematics Voltage
ar r 4 30
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©John F. Rider, Publisher
www.americanradiohistory.com
l'AGE 7-12 HOWARD
MODELS 47-A,50 50 -SW
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HOWARD RADIO CO.
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MODEL E-57 Schematics Voltage
HOWARD RADIO CO.
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PAGE 7-14 HOWARD
MODEL 60 MODEL 60-SW
HOWARD RADIO CO.
Scheratics,Voltage
Socket,Notes MODEL 57-A Notes
MOUL 60
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1. See the schematics for the various voltages at the sockets.
2. Should the chassis be serviced at any time it is important to check the position of the pilot light socket brackets and be sure they do not touch the speaker cone on the edges or at any point. They should be in such a position so as to not be forced against the cone by the cabinet panel when installed back in cabinet.
3. The pilot light leads running from the sockets to the resistor should be kept high and away from all nearby wires to avoid pick-up hum.
4. The Short Wave Models attain the range by use of shunt coils across the R.F. and oscillator secondaries.
5. The Intermediate Frequency transformers should be aligned to 456 KC.
6. When the variable condenser is a full capacity (all the way to the right) the dial hand should be set on the horizontal dividing line.
7. The back section of the two gang condenser is the oscillator section and the
trimmer should be peaked at 1400 KC and then peak the R.F. trimmer (Front section) to 1400.
©John F. Rider, Publisher
www.americanradiohistory.com
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HOWARD RADIO CO.
HOWARD PAGE, 7-15
MODEL 58 Schematic Voltage
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MODEL 58 Alignment
HOWARD RADIO CO.
So cis et, Trin>mers
Parts List
Pírt No.
7601 4157 4158 4159 4180 4161 416E 4320 5525 5527 8120 8812 8218 3127 2319 3513 3517 2183 2475 3515 8304 3410 6221 4063
PRICES SUBJECT TO CBABOE Description WITHOUT NOTICE
Bias Cell - 1 Volt Coil - Antenna B.C. Coil - Oscillator B.C. Coil - Antenna S.W. Coil - Oscillator S.W. Coil - 1st. I.F. Complete with can end grid cap Coil - End. I.F. Complete with can and grid cap Choke - 560 ohm, tapped at 190 ohms Cord - line, 128 ohms Cord - line, 112 ohms Condenser - variable, 2 gang Condenser - 18-12 Mfd. Electrolytic - 200 volt Condenser - Padding 250-550 Mmfd. Condenser - Trimmer 3-30 Mfd, Condenser - .1 Mfd. 200 Volt Condenser - .02 Mfd. 200 Volt Condenser - .02 Mfd. 400 Volt Condenser - .05 Mfd. 200 Volt Condenser - .25 Mfd. 200 Volt Condenser - .006 Mfd. 400 Volt Condenser - .0003 Moulded Mica Condenser - .00005 Moulded Mica Control - Volume and switch - 500M ohms
Dial card - calibrated
Price
.20 .56 .35 .40 .40 .90 .90 1.00 .84 .64 2.25 1.00 .20 .18 .18 .16 .20 .16 .18 .24 .12 .12 .92 .35
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REPLACEMENT PARTS LIST
4014 4057 4058 7112 7113 1919-A 3340 2765 1843 3327 3355 3328 3335 3381 3362 2748 2747 4030 8908 5815 8600 6801 8802 2463
Dial hand end screw Drive disc - 1/4s hub (pyralin) Dial glace Knob - plain Knob - coded (specify colore) Lamp - dial - 6 volt (brown bead) Resistor - 200 ohms - 1/4 Watt Resistor - 10M ohms - 1/4 Watt Resistor - 50M ohms - 1/4 Watt Resistor - 100M ohms - 1/4 Watt Resistor - 250M oboe - 1/4 Watt Resistor - 500M ohms - 1/4 Watt Resistor - 1 Megohm - 1/4 Watt Resistor - 40 ohm cendohm Resistor - 60 ohm candohm Socket - 8 prong Socket - 7 prong Socket - pilot light (slotted) Speaker - 55 - 3,000 ohms Switch - 2 band Tube shield - bese Tube shield - shall Tube shield - top Wire - 20 Ft. antenna roll
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IIOWARI) RAI)IO CO.
HOR'AHI) PAGE 7-17
MODEL 68 Schematic Voltage
THE TUNING EYE
The movement of the tuning eye or resonance indicator is easily understood, as the station is tuned in, the green sections of the eye will draw together or tend to draw together depending upon the strength of the station. Rotate the tuning knob back and forth until the exact resonance point is found.
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www.americanradiohistory.com
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MODEL 68 Circuit Data Notes ,Parts
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PAGE 7-20 HOWARD
MODELS 77-T,77 -C
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PAGE 7-22 HOWARD
MODEL 99 Long Wave Schematic ,Vol tage Notes ,Alignment
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PAGE 7-24 HOWARD
MODEL 99 -T,99 -C Alignment,Chassis
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INTERNATIONAL PAGE 7-1
IN'I'}+:RN.1'l'IONAI. RADIO CORP.
MODELS 40,41,43, 44 , J ewel
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MODES 66X,86,96
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This chassis is designed to operate from 1l$ volt power lines, either alternating or direct current. It is a Leo band receiver covering the American broadcast and police and airport bands.
The following tubes are employed:
6D6 6D6 6r6 -
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ALIGNMENT
43 - Pentode Output 25Z5 - Rectifier 16524 - Regulator
ESSENTIAL DATA: The. intermediate frequency employed 1s 448 Sc.
The standard type of output meter should be used to indicate signal strength. nected from the plate of the 43 tube to grouñd.
Poor sensitivity may be an indication of. incorrectly adjusted I. F. trimmers.
It should be con-
Aligning of Broadcast band should be done on 1400, 1000 and 600 kilocycles.
INTERMEDIATES: To align the I. F. circuits, set the signal generator to 448 Kc. and feed its modulated signal direct to the antenna. Adjust the first I. F. transformer trimmers for maximum meter reading. Go over both adjustments et least three or four times for accuracy. Repeat this process on the second I. F. transformer. If adjustments are not made accurately, selectivity will be poor and 1. F. oscillation may result. Finally, adjust the trimmer in the tuned wave trap for minimum
meter reading.
BROADCAST BAND: Place the band change switch on the Broadcast position. Turn the dial to 1400 Ec. and feed e very weak 1400 Kc. modulated signal from your signal generator to the antenna. Adjust the broadcast oscillator trimmer and detector trimmer (on condenser gang) for maximum reading.
There is no adjustable padder condenser in this model so resonance on lower frequencies is accomplished by bending slates on tuning condensers.
SHORT WAVE BAND: No alignment necessary.
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PAGE 7-2 INTERNATIONAL
MODELS 66X,86,96
Schematic,Parts
INTERNATIONAI. RADIO CORP.
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PARTS PRICE LIST
MODELS 66X, 86, 96
Part No.
Description
List Price Part Nc.
Description
Lïst Price
A-140 2 gang tuning condenser (Model 96) A-146 2 gang tuning condenser (Models 66X & 86) ...
A-248 100 mmf. type 0 condenser
A-250 325 mmf. mica padder condenser A-329 .005 mfd. 600 v. paper condenser A-351 .05 mfd. 200 v. tubular condenser A-352 .05 mfd. 300 v. tubular condenser 4-354 .25 mfd. 25 v. tubular condenser
-359 .01 mfd. 400 v. tubular condenser A-376 .1 mfd. 25 v. tubular condenser A-443 Electrolytic filter condenser D-34 Dynamic speaker Model 86
D-40 Dynamic speaker Model 96 D-43 Dynamic speaker Model 66X) E -111P Knob (Model 66X) E-161 Large knob (Model 86 & 96 E-162 Small knob (Model 86 & 96 E-282 Dial pointer (Model 96) E-283 Dial pointer (Model 66X & 86) E-294 Transparent dial window Model 96) E-298 Transparent dial window Model 66X & 86) E-299 Dial scale Model 66X) E-2002 Dial scale Model 86)
E-481 Special pilot lamp 6-8 v.,.15 amp. E-483 Pilot lamp socket & bracket (Model 66X & 86) E-485 Wave band switch (Model 66X & 86) E-492 Pilot lamp socket and bracket (Model 96)
$1.90 1.85 .20 .20 .15 .15 .15 .20 .15 .15 1.15 3.25 3.25 3.00 .10 .10 .10 .10 .05 .25 .20 .15 15 15 .10 35 .10
E-2004 E-4000 G-112 H-18 H-19 H-21 H-41 H-58 R-159 R-160 R-258 R-259 R-264 R-276 R-280 R-284 R-285 T -265A T -266A T -282A T -333A T -341A U-118 X-368 X-366 X-371.
Dial acale (Model 96) Wave band switch (Model 96) Dial drive spring (Model 96) 2525 tube socket 6D6 tube socket 43 tube socket 6C6 tube socket 165R4 tube socket Volume control & power switch Volume control & power switch 1 megohm carbon resistor 500 M ohm carbon resistor 100 M ohm carbon resistor 500 ohm carbon resistor 2000 ohm carbon resistor 200 M ohm carbon resistor 300 M ohm carbon resistor Detector coil Oscillator coil Tuned wave trap 1st I. F. transformer 2nd I. F. transformer Power cord and plug Cabinet Model 66X) Cabinet Model 86 Cabinet Model 96)
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PRICES SUBJECT TO CHANGE 'WITHOUT NOTICE
©John F. Rider, Publisher
www.americanradiohistory.com
INTERNATIONAL RADIO CORP.
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PAGE 7-4 INTERNATIONAL
MODELS 77,777,778 779
Alignment ,Part s
INTERNATIONAL RADIO CORP.
MODEL 77 SERIES
ALIGNMENT
February, 1936
ESSENTIAL DATA: The intermediate frequency employed is 448 Kc.
The standard type of output meter should be used to indicate signal strength. It should be connected from the plates of the 43 tubes to ground.
Poor sensitivity may be an indication of incorrectly adjusted I. F. trimmers.
Aligning of Broadcast band should be done on 1400, 1000 and 600 kilocycles.
The three trimmers on the bottom of the chassis are, reading from the end of the chassis toward the center, B. C. oscillator, S. W. detector and S. W. oscillator. No trimmer is used across the B. C. detector coil. BROADCAST BAND: Place the band change switch on the Broadcast position. Turn the dial to 1400 Kc. and feed a very weak 1400 Kc. modulated signal from yoursignal generator to the antenna. Adjust the broadcast oscillator trimmer for maximum reading.
There is no adjustable padder condenser in this model so resonance on lower frequencies is accomplished by bending plates on tuning condensers.
INTERMEDIATES: To align the I. F. circuits, set the signal generator to 448 Kc.
and feed its modulated signal direct to the antenna. Adjust the first I. F. transformer trimmers for maximum meter reading. Go over both adjustments at least three or four times for accuracy. Repeat this process on the second I. F. transformer. If adjustments are not made accurately, selectivity will be poor and I. F. oscillation may result.
SHORT WAVE BAND: Place the band change switch on the Short Wave position. Turn the dial to 15.5 megacycles and feed a very weak 15.5 megacycle modulated signal from your signal generator to the antenna. Adjust the S. W. oscillator trimmer for maximum reading on the output meter. This trimmer should not be touched again when checking alignment on other frequencies.
Next go to 12 megacycles and adjust the S. W. detector trimmer.
Instead of bending condenser plates at 6 megacycles alignment is accomplished by spreading or crowding turns on the S. W. detector coil. If much crowding or spreading is necessary it is advisable to go back and recheck at 12 megacycles.
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PAGE 7-6 INTERNATIONAL
MODEL 87 Joltage,Socket Alignment,Parts
INTERNATIONAL RAllIO CORP.
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l'AG1: 7-8 INTI?RNATIONAI.
I;MODEL 400
Alignment
Parts
INTERNATIONAI, RADIO CORP.
MODEL 400 SERIES
Model 400 is a two band, battery operated receiver. The right-hand knob is the wave band switch. It should be turned to the left for broadcast band reception. When turned to the right the receiver tunes the police, airplane and amateur band for 70 to 200 meters.
This receiver requires 4-1/2 volts of "A" battery and 135 volts of "B" battery. For "B" supply, three 45 volt "B" batteries are required. Each should have a 22-1/2 volt connection, or "tap", and the size of each battery should not exceed 2-1/2 x 4-1/4 x 6 inches though the largest battery available within this size should be used. Batteries such as the Eveready No. 762, Burgess No. 5308, Ray -O -yac No. 5303, etc., are suitable.
For "A" battery supply, three standard "No. 6" dry cells --as used for telephone, ignition and
radio --are required. These are 1-1/2 volt batteries--three connected in series providing the
necessary 4-1/2 volts. These batteries are approximately 6 inches long and 2-1/2 inches in
diameter (or square). Dry cells such as the Eveready No. 7111, Burgess "Little Six", Ray -O -
Vac No. 66, etc., are suitable.
ALIGNMENT
The standard type of output meter should be used to indicate signal strength. It may be connected from plate of the 950 tube to ground.
ESSENTIAL DATA: The intermediate frequency employed is 448 Kc.
The rear section of the two gang condenser is the oscillator section; the front section, first detector.
INTERMEDIATES: To align the I.F. circuits, set the signal generator to 448 Kc. and feed its modulated signal direct to the antenna. Short out the oscillator section of the two gang condenser. Adjust the first I.F. transformer trimmers for maximum meter reading. Go over both adjustments at least three or four times for accuracy. Repeat this process on the second I.F.
transformer. If adjustments are not made accurately, selectivity will be poor and I.F. oscillation may result. Due to the I.F. trap in the antenna circuit a strong signal is necessary.
BROADCAST BAND: Place the band change switch on Broadcast position. Turn the dial to 1400 Kc. and feed a very weak 1400 Kc. modulated signal from your signal generator to the antenna. Adjust the broadcast oscillator trimmer for maximum reading. On most sets the detector trimmer
has its adjusting screw purposely removed.
There is no adjustable padder condenser in this model so resonance on the low frequency end is accomplished by bending plates on the tuning condensers. Check the alignment at 1000 Kc. Insert a thin bakelite, celluloid or mica feeler strip between the plates of the variable condensers to determine whether the circuits are properly matched. The action is this --the dielectric constant of the celluloid feeler strip being higher than that of the air it displaces, results in an increase of capacity. Open the variable condenser just enough to indicate two or three points below maximum signal. As the feeler is inserted the meter reading should indicate increasing signal and then decreasing as the feeler is inserted farther. This procedure should be followed on both sections. Should the meter fail to show an increase in signal as the strip is inserted in one section this indicates too great a capacity for that section. This may be corrected by bending the outside rotor plates out at the point where they begin to mesh with the stator.
After checking the alignment at 1000 Kc. repeat the process at 600 Kc.
SHORTWAVE BAND:
No alignment necessary due to untuned detector circuit.
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INTERNATIONAL RAI)IO CORP.
INTERNATIONAL PAGE 7-9
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www.americanradiohistory.com
PAGE 7-10 INTERNATIONAL
MODEL 500
Alignment Socket
Battery Connections
INTERNATIONAL RADIO C'ORI'.
MODEL 500
Model 500 is a two band, battery operated receiver. The right-hand knob is the wave band switch. It should be turned to the left for broadcast band reception. When turned to the right the receiver tunes the American -Foreign Short Wave band of 18 to 55 meters.
The following tubes are employed:
106 - 1st Detector -Oscillator 34 - I.F. Amplifier 34 - I.F. Amplifier 25S - 2nd Detector-A.V.C.-A.F. 33 - Power Amplifier
ALIGNMENT
Amplifier
The standard type of output meter should be used to indicate signal strength. It may be connected from plate of the 33 tube to ground.
ESSENTIAL DATA: The intermediate frequency employed is 448 Kc.
The rear section of the two gang condenser is the oscillator section; the froùt section, first detector.
INTERMEDIATES: To align the I.F. circuits, set the signal generator to 448 Kc. and feed its modulated signal direct to the antenna. Short out the oscillator sectión of the two gang
condenser. Adjust the first I.F. transformer trimmers for maximum meter reading. Go over both adjustments at least three or four times for accuracy. Repeat this process on the second I.F. transformer. The third I.F. transformer has only one trimmer. If adjustments are
not made accurately, selectivity will be poor and I.F. oscillation may result. Due to the
I.F. trap in the antenna circuit a strong signal is necessary.
BROADCAST BAND: Place the band change switch on Broadcast position. Turn the dial to 1400 Kc. and feed a very weak 1400 Kc. modulated signal from your signal generator to the antenna. Adjust the broadcast oscillator trimmer for maximum reading. A three gang trimmer will be found on the bottom of the chassis. The oscillator trimmer mentioned is the section nearest the end of the chassis.
There is no adjustable padder condenser in this model so resonance on the low frequency end is accomplished by bending plates on the tuning condensers. Check the alignment at 1000 Kc.
Insert a thin bakelite, celluloid or mica feeler strip between the plates of the variable condensers to determine whether the circuits are properly matched. The action is this --the dielectric constant of the celluloid feeler strip being higher than that of the air it dis-
places, results in an increase of capacity. Open the variable condenser just enough to indicate two or three points below maximum signal. As the feeler is inserted the meter reading should indicate increasing signal and then decreasing as the feeler is inserted farther. This
procedure should be followed on both sections. Should the meter fail to show an increase in signal as the strip is inserted in one section this indicates too great a capacity for that section. This may be corrected by bending the outside rotor plates out at the point where they begin to mesh with the stator.
After checking the alignment at 1000 Kc. repeat the process at 600 Kc.
SHORT WAVE BAND: Place the band change switch on the Short Wave position. Turn the dial to 15.5 megacycles and feed a very weak 15.5 megacycle modulated signal from your signal generator to the antenna. Adjust the S. W. oscillator trimmer (at opposite end of three gang
trimmer) for maximum reading on the output meter. This trimmer should not be touched again when checking alignment on other frequencies.
Next go to 12 megacycles and adjust the S. W. detector trimmer.
Instead of bending condenser plates at 6 megacycles alignment is accomplished by spreading or crowding turns on the S. W. detector coil. If much crowding or spreading is necessary it is advisable to go back and recheck at 12 megacycles.
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©John F. Rider, Publisher
WHITE WIR[ D+67i ,. RED WIRE B+135m (SIMPL/FIED BATTERY DIAGRAM)
www.americanradiohistory.com
IN'l'RROC'EAN RADIO CORP.
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'AGE 7-2 I\'I'I:It()C'I':A\
MODELS 500,515,516 Voltage,nlignment Parts List
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Resistors
63-121 63-135 63-137 63-140
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250M " 1 meg"
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63-160 100M "
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63-169 400M "
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63-239 24M ohm 1 Watt (Oscillator Plate)
63-244 500 " á "
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63-251 Voltage Divider (six tap)
63-+252 Voltage Divider (five tap)
20-30 20-31 20-35 95-133
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Condensers
22-112 22-113
22-115
22-117 22-137 22-147 22-170 22-171 22-172 22-173
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.1 " 200 volt(Four used, see below)
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.05 " 400 volt(Oscillator Plate)
.0005 600 volt(2nd Detector Plate & A.V.C.Screen)
.1 mfd 400 volt(R.F.& let Detector Plate,2nd Detector
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2. " 450 volt(Filter)
8. " 500 volt(Filter)
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Socket Voltages
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All readings,with exception of heaters, taken from socket connections to ground
Use 1,000 ohm per voit D. C. meter.)
BALANCE I.F. frequency at 175 K.C. Condenser gang at 1500 K.C. and oscillator padder at 600 K.C.
©John F. Rider, Publisher
www.americanradiohistory.com
PdfCompressor 6.5.985 CVISION Technologies