RCA - Catlogs and manuals RCA broadcasting equipment
Y
Broadcast Equipment
BTE-15A
FM Exciter
ES -560631
IB-8027524-2
Broadcast Equipment
Instructions
BTE-15A FM Exciter
ES -560631, ES -560632, ES -560633, ES -560634, ES -560635, ES -560636
BTE-10AT FM Broadcast Transmitter
ES -560698 and ES -560698A
BTS-1B Stereo Generator, Complete with Rack Mount and Power Supply
ES -560639
BTX-1B SCA Generator,
Complete with Rack Mount and Power Supply
ES -560640 and ES -560641
Communications Systems Division/Front and Cooper Streets/Camden. New Jersey, U.S.A. 08102
PRINTED IN U.S.A. BB737M
113-8027524-2
II
SAFETY PRECAUTIONS
This equipment is designed to fully safeguard all personnel from operating hazards. Labels on the equipment and caution notices in the instruction book clearly point out these potential hazards.
Any module or Printed Wiring Board may have hazardous voltages exposed, so caution must be exercised.
Follow the recommended procedures provided in the Instruction Book for care and maintenance of the equipment.
Always replace the protective covers after servicing the equipment.
WARRANTY ITEMS Particular parts and/or equipment covered by warranty are specifically stated as such in the warranty or contract given to the customer at the time of sale. The warranty or contract also stipulates the conditions under which the warranty may be exercised. To obtain a new replacement for such warranty items, contact your local RCA sales office and please supply Product Identification (including the Original Invoice Number, MI Number, Type Number, Model Number, and Serial Number) and Replacement Part Identification (including Stock Number and Description). Requests for warranty replacements may be unduly delayed if all this information is not supplied.
EQUIPMENT LOST OR DAMAGED IN TRANSIT When delivering the equipment to you, the truck driver or carrier's agent will present a receipt for your signature. Do not sign it until you have (a) inspected the containers for visible signs of damage and (b) counted the containers and compared with the amount shown on the shipping papers. If a shortage or if evidence of damage is noted, insist that notation to that effect be made on the shipping papers before you sign them. Further, after receiving the equipment, unpack it and inspect thoroughly for concealed damage. If concealed damage is discovered, immediately notify the carrier, confirming the notification in writing, and secure an inspection report. This item should be unpacked and inspected for damage WITHIN 15 DAYS after receipt. Report all shortages and damages to RCA, Communication Systems Division - Camden, New Jersey 08102. RCA will file all claims for loss and damage on this equipment so long as the inspection report is obtained. Disposition of the damaged item will be furnished by RCA.
FIELD ENGINEERING SERVICE RCA Field Engineering Service is available at current rates. Requests for fielu engineering service may be addressed to your RCA Broadcast Field Representative or the RCA Service Company, Incorporated - Broadcast Service Division - Camden, New Jersey 08102. Telephone 609-963-8000.
TECH ALERT Emergency 24 hour telephone consultation service for technical problems is available. Call TECH ALERT at 609-963-8000 extension PC3434.
111
WARNING
VOLTAGES THAT ARE DANGEROUS TO LIFE ARE INVOLVED IN THE OPERATION OF THIS ELECTRONIC EQUIPMENT, OPERATING PERSONNEL
MUST AT ALL TIMES OBSERVE ALL SAFETY REGULATIONS. DO NOT CHANGE TUBES OR MAKE ADJUSTMENTS INSIDE THE EQUIPMENT
WITH VOLTAGES APPLIED. DANGEROUS CONDITIONS MAY EXIST IN CIRCUITS WITH POWER
CONTROLS IN THE OFF POSITION DUE TO CHARGES RETAINED BY CAPACITORS, ETC. ALWAYS DISCHARGE AND GROUND CIRCUITS
PRIOR TO TOUCHING THEM TO AVOID PERSONAL INJURY OR LOSS OF LIFE.
EMERGENCY
FIRST AID INSTRUCTIONS
Personnel engaged in the installation, operation, or maintenance of this equipment or similar equipment are urged to become familiar with the following rules both in theory and practice. It is the duty of all operating personnel to be prepared to give adequate Emergency First Aid and thereby prevent avoidable loss of life.
RESCUE BREATHING
Find out if the person is
breathing.
You must find out if the person has stopped breathing. If you think he is not breathing, place him flat on his back. Put your ear close to his mouth and look at his chest. If he is breathing, you can feel the air on your cheek. You can see his chest move up and down. If you do not feel the air or see the chest move, he is not breathing.
2. If he is not, open the airway by tilting his head backward.
Lift up his neck with one hand and push down on his forehead with the other. This opens the
airway. Sometimes doing this will let the person breathe again
by himself. If it does not, begin
rescue breathing.
3. If he is still not breathing, begin rescue breathing:
Keep his head tilted backward. Pinch his nose shut. Put your mouth tightly over his mouth. Blow into his mouth once every
five seconds.
Do Not Stop Rescue Breathing Until Help Comes.
LOOSEN CLOTHING - KEEP WARM
Do this when the victim is breathing by himself or help is available. Keep him quiet as possible and from becoming chilled. Otherwise, treat him for shock.
BURNS
SKIN REDDENED: Apply ice cold water to burned area to prevent burn from going deeper into skin tissue. Cover area with clean sheet or cloth to keep away air. Consult a physician.
SKIN BLISTERED OR FLESH CHARRED: Apply ice cold water to burned area to prevent burn from going
deeper into skin tissue. Cover area with clean sheet or cloth to keep away air. Treat victim for shock and take to hospital.
EXTENSIVE BURN -SKIN BROKEN: Cover area with clean sheet or cloth to keep away air. Treat victim for shock and take to hospital.
A
LIST OF REVISED, ADDED OR DELETED PAGES
The following is a list of the pages in this Instruction Book that have been Revised, Added, or Deleted with their effective date of change:
Front Cover - New
Title Page
- New
I through III - New
A
- Added
V thorugh 154 - New
V
TABLE OF CONTENTS
BTE-15A EXCITER
TECHNICAL SUMMARY
1
Electrical Specifications
1
Mechanical Specifications
1
BTE-15A FM EXCITER SYSTEM OPTIONS
2
CRYSTAL UNITS
3
TRANSISTOR AND IC COMPLEMENT
4
RECOMMENDED TEST EQUIPMENT
4
DESCRIPTION
5
BTE-15A Exciter System
5
FM Exciter
6
Modulated Oscillator
8
Radio Frequency Power Amplifier (RFA)
8
AFC Circuit
9
BTS-lB Stereo Generator
9
Stereo Carrier and Pilot
10
Audio Channels
10
Switching Modulator
10
Monaural Operation
12
Monaural Audio Module
12
BTX-1B SCA Subcarrier Generator
12
Modulated Oscillator
13
Muting Circuits
13
BTE-15A Main Frame
15
Off -Frequency Shutdown Circuit
15
Meter Amplifier
16
INSTALLATION
16
Main Frame
16
Connections
16
FM Exciter
17
Stereo Generator
17
SCA Generator
17
TUNING
17
BTE-15A RF Amplifier (RFA)
17
BTS-1B Stereo Generator
18
BTX-1B SCA Generator
19
Typical Panel Meter Readings (Table)
20
PARTS ORDERING INFORMATION
24
Replacement Parts
24
Emergency Parts Service
24
REPLACEMENT PARTS
25
SUGGESTED EQUIPMENT SPARES
40
SUPPLEMENT I
BTE-10AT FM BROADCAST TRANSMITTER
EQUIPMENT LIST
131
BTE-10AT FM Broadcast Transmitter, Cabinet Mounted Version, ES -560698
131
BTE-10AT FM Broadcast Transmitter, Rack Mounted Version, ES -560698A
131
TECHNICAL SUMMARY
131
Electrical Specifications
131
Mechanical Specifications
131
VI
SUPPLEMENT I (Continued)
BTE-10AT FM BROADCAST TRANSMITTER
DESCRIPTION
132
General
132
INSTALLATION
133
OPERATION
134
REPLACEMENT PARTS
134
SUPPLEMENT II
BTS-1B STEREO GENERATOR
EQUIPMENT LIST
137
BTS-1B (Rack Mounted) ES -560639
137
137 TECHNICAL SUMMARY
137 Electrical
137 Mechanical
DESCRIPTION
138
REPLACEMENT PARTS
140
SUGGESTED EQUIPMENT SPARES
140
SUPPLEMENT III
BTX-1B SCA GENERATOR COMPLETE with RACK MOUNT and POWER SUPPLY
EQUIPMENT LIST
BTX-1B (Rack Mounted) ES -560640
147
BTX-1B (Rack Mounted) ES -560641
147
TECHNICAL SUMMARY 147
Electrical 147
Mechanical
148 DESCRIPTION
REPLACEMENT PARTS
150
SUGGESTED EQUIPMENT SPARES
150
LIST OF ILLUSTRATIONS
Figure
1
BTE-15A Exciter System
2 BTE-15A System, Block Diagram
3
FM Exciter, Simplified Block Diagram
4 BTS-lB Stereo Generator, Simplified Block Diagram
5
BTX-1B SCA Generator, Simplified Block Diagram
5a Typical Waveforms, BTS-1B Stereo Generator
6
BTE-15A Exciter System, Front View
7
BTE-15A System, Module Extender
8
BTE-15A System, Module Extender Installed
9 BTE-15A System, Modules Removed
10 Main Frame, Rear View
11
Main Frame, Parts Location
12 Main Frame, Rectifier and Filter
13
Main Frame, Fuse Panel
14 Main Frame Metering Amplifier Board, Parts Location
15 Main Frame Metering Amplifier Board, Parts Location
16 Main Frame Metering Amplifier Board, Parts Overlay, Top
17 Main Frame Metering Amplifier Board, Parts Overlay, Bottom
18
Exciter, Top View
19
Exciter, Modulated Oscillator Board, Parts Location
20
Exciter, Modulated Oscillator Board, Parts Location
21
Exciter, AFC Board, Parts Location
22
Exciter, RF Amplifier, Parts Location, Top
23
Exciter, RF Amplifier, Parts Location, Bottom
24
Exciter, Modulated Oscillator Board, Parts Overlay, Top
25
Exciter, Modulated Oscillator Board, Parts Overlay, Bottom
26
Exciter, AFC Board, Parts Overlay, Top
27
Exciter, AFC Board, Parts Overlay, Bottom
28 Stereo Generator, Overall View
29
Stereo Generator Board, Parts Location
30 Stereo Generator Board, Parts Location
31
Stereo Generator Board, Parts Location
32
Stereo Generator Board, Parts Location
33 Stereo Generator Sub -Board, Parts Location
34 Stereo Generator Board, Parts Overlay, Top
35 Stereo Generator Board, Parts Overlay, Bottom
36
Stereo Generator Sub -Board, Parts Overlay, Top
37 Stereo Generator Sub -Board, Parts Overlay, Bottom
38 Monaural Audio Board, Parts Overlay, Top
39 Monaural Audio Board, Parts Overlay, Bottom
40 SCA Generator Overall View
41
SCA Generator Board, Parts Location, Ser. No. 1 through 999
42 SCA Generator Board, Parts Location, Ser. No. 1 through 999
42a SCA Generator Board, Parts Location, Ser. No. 1000 and up
42b SCA Generator Board, Parts Location, Ser. No. 1000 and up
43
SCA Generator Board, Parts Location, Ser. No. 1 through 999
43a SCA Generator Board, Parts Location, Ser. No. 1000 and up
44
SCA Generator Board, Parts Location, Ser. No. 1 through 999
44a SCA Generator Board, Parts Location, Ser. No. 1000 and up
45
SCA Generator Board, Parts Overlay, Bottom, Ser. No. 1 through 999
45a SCA Generator Board, Parts Overlay, Ser. No. 1000 and up
46
SCA Option Select Board, Parts Overlay, Top
47
SCA Option Select Board, Parts Overlay, Bottom
48 BTS-1B Power Supply Board, Parts Overlay
49
BTX-1B Power Supply Board, Parts Overlay
Semiconductor Base Data
-
Integrated Circuit Schematics
50
BTE-15A Main Frame, Schematic Diagram
51
BTE-15A FM Exciter, Schematic Diagram
52
BTS-1B Stereo Generator, Schematic Diagram
53 Monaural Audio Module, Schematic Diagram
54
BTX-1B SCA Generator, Schematic Diagram, Ser. No. 1 through 999
54a BTX-1B SCA Generator, Schematic Diagram, Ser. No. 1000 and up
55 T101 Connection
56 Test Fixture
57
BTX-1B Low -Pass Filter Installation
58 Main Frame, Wiring Diagram
59 Main Frame Door Assembly, Wiring Diagram.
60 Exciter Assembly, Wiring Diagram
61
Exciter, Modulated Oscillator and AFC Assembly, Wiring Diagram
62 Exciter, RF Amplifier Assembly, Wiring Diagram
63 Stereo Generator, Wiring Diagram
64 Stereo Generator Filter and Transformer Assembly, Wiring Diagram
VII
Page
5 6 7 11
14 21 42 43 43 44 45 46 47 47 48 49 50
51
52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
71 72
73 74 75 76 77 78 79 80 82 83 84 85 86 86 87 87 88 90 95 97 99 101 103 105 107 108 109 111 113 115 117 119 121 123
VIII
LIST OF ILLUSTRATIONS (Continued)
Figure 65 66 67 68 69 70
71 72 73 74 75 76 77
Monaural Audio Module, Wiring Diagram SCA Generator, Wiring Diagram BTE-10AT FM Transmitter ES -560698 Connector Cap Assembly Details BTE-10AT FM Transmitter, Rear View BTS-1B Stereo Generator ES -560639 BTS-1B Stereo Generator, Rear View BTS-1B Stereo Generator Main Frame, Schematic Diagram BTS-1B Stereo Generator Main Frame, Wiring Diagram BTX-1B SCA Generator ES -560641 BTX-1B SCA Generator, Rear View SCA Generator Main Frame, Schematic Diagram SCA Generator Main Frame, Wiring Diagram
Page 125 127 132 133 134 138 139 141 143 148 149
151 153
TECHNICAL SUMMARY
ELECTRICAL SPECIFICATIONS
Type of Emission Frequency Range Power Output Output Impedance Modulation Capability Carrier Frequency Stability Audio Input Impedance Audio Frequency Response (30-15,000 Hz) Audio Input Level (100% Modulation) Harmonic Distortion (50-15,000 Hz) FM Noise Level (referred to 100% FM Modulation) AM Noise Level (referred to carrier voltage) SCA Subcarrier Input Level (100% modulation) SCA Subcarrier Input Impedance Main Channel to Sub -Channel Crosstalk Sub -Channel to Main Channel Crosstalk Power Line Requirements
Slow Voltage Variations Power Consumption BTE-15A Exciter, including
BTS-1B Stereo Generator and BTX-1B SCA Generator
F3 and F9 88 to 108 MHz 15 watts nominal, adjustable
50 ohms ±125 KHz min. +1000 Hz max: 600 / 150 ohms, resistive'
±1 dB max3 + 10 -±2 dBm2
0.5% or less4 -68 dB max. -60 dB max. -15 to +10 dBm, adjustable 600 / 150 ohms, bal.
-50 dBs -60 dB6 1 17V / 208 / 240V ±5%, 50 / 60 Hz
±5%
80 watts
MECHANICAL SPECIFICATIONS
Height Width Depth Weight Altitude (Max.) Temperature Range
Net 10-1/2"(26.7 cm)
19"(48.3 cm) 12-5/8"(32.1 cm)
401b.(18.1 kg)
Shipping 19"(483 cm) 24-1/4"(56.5 cm) 17-1/2"(44.5 cm) 591b.(26.8 kg)
7500 ft.
-20 to +50°C
lAudio pre -emphasis 75 microseconds (50 microseconds if desired). 2 Level measured at input jack with 400 Hz tone applied. 3 Audio frequency response referred to 75 (or 50) microsecond pre -emphasis curve. 4Distortion includes all harmonics up to 30 KHz and is measured following a standard 75 (or 50) microsecond de -emphasis
network. s Relative to ±7.5 KHz deviation of the subcarrier by a 400 Hz tone, main channel modulated 70% by 30 to 15000 Hz tones and
30% by subcarrier, using narrowband detector. 6Relative to ±75 KHz deviation of the main carrier by a 400 Hz tone, subcarrier modulated ±7.5 KHz by.30 to 6000 Hz tones,
main carrier modulated 30% by subcarrier, using narrowband detector.
2
BTE-15A FM EXCITER SYSTEM OPTIONS
The BTE-15A FM Exciter System is available in several forms.
1.Mono System, ES -560631, includes (A) 1 Main frame (B) 1 BTE-15A r -f exciter module (C) 1 Monaural audio module (replaces BTS-1B Stereo generator) (D) 2 Blank panels (used in place of SCA generators) (E) 1 Crystal, with oven (operate crystal for BTE-15A exciter module) (F) 1 Module extender
2. Mono and 1 SCA System, ES -560632, includes (A) 1 Main frame (B) 1 BTE-15A r -f exciter module (C) 1 Monaural audio module (replaces BTS-1B Stereo generator) (D) 1 BTX-1B SCA generator (E) 1 Blank panel (used in place of second SCA generator) (F) 1 Crystal, with oven (operate crystal for BTE-15A exciter module) (G) 1 Module extender (H) 1 5 kHz low pass filter (installed)
3. Mono and 2 SCA System, ES -560633, includes (A) 1 Main frame (B) 1 BTE-15A r -f exciter module (C) 1 Monaural audio module (replaces BTS-1B Stereo generator) (D) 2 BTX-1B SCA generator (E) 1 Crystal, with oven (operate crystal for BTE-15A exciter module) (F) 1 Module extender (G) 2 5 kHz low pass filter (installed)
4. Stereo System, ES -560634, includes (A) 1 Main frame (B) 1 BTE-15A r -f exciter module (C) 1 BTS-1B Stereo generator (D) 2 Blank panels (used in place of SCA generators) (E) 1 Crystal, with oven (operate crystal for BTE-15A exciter module) (F) 1 Module extender
5. Stereo and 1 SCA System, ES -560635, includes (A) 1 Main frame (B) 1 BTE-15A r -f (C) 1 BTS-1B Stereo generator (D) 1 BTX-1B SCA generator (E) 1 Blank panel (used in place of second SCA generator) (F) 1 Crystal, with oven (operate crystal for BTE-15A exciter module) (G) 1 Module extender (H) 1 5 kHz low pass filter (installed)
6. Stereo and 2 SCA System, ES -560636, includes (A) 1 Main frame (B) 1 BTE-15A r -f exciter module (C) 1 BTS-1B Stereo generator (D) 2 BTX-1B SCA generator (E) 1 Crystal, with oven (operate crystal for BTE-15A exciter module) (F) 1 Module extender (G) 2 5 kHz low pass filter (installed)
A 41 kHz SCA can not be used simultaneously with stereo.
In addition, the following subsystems are available for use with existing FM exciters:
1. BTS-1B Stereo Generator, ES -560639, includes (A) 1 Main frame (mounts stereo generator only) (B) 1 BTS-1B Stereo generator (C) 1 Module extender
2. BTX-1B SCA Generator (One) ES -560640, includes (A) 1 Main frame (mounts 1 or 2 SCA generators only) (B) 1 BTX-1B SCA generator (C) 1 Blank panel (used in place of second SCA generator) (D) 1 Module extender (E) 1 5 kHz low pass filter (installed)
3. BTX-1B SCA Generator (Two) ES -560641, includes (A) 1 Main frame (mounts 1 or 2 SCA generators only) (B) 2 BTX-1B SCA generators (C) 1 Module extender (D) 2 5 kHz low pass filter (installed)
The following optional items are available for use with BTE-15A Exciter Systems:
1. Recommended Spare RF Transistors
2. A set of Connector Plugs for the BTE-15A Exciter
*M1 item number, depending on Frequency, must be added.
.
MI -560710 MI -560712 MI -560716 MI -560715 MI -560717-5 MI -560719
MI -560710 MI -560712 MI -560716 MI -560714-* MI -560715 MI -560717-* MI -560719 MI -560221
MI -560710 MI -560712 MI -560716 MI -560714-* MI -560717-5 MI -560719 MI -560221
MI -560710 MI -560712 M1-560713 MI -560715 MI -560717-* MI -560719
MI -560710
MI -560713 MI -560714-5 MI -560715 MI -560717-5 MI -560719 MI -560221
MI -560710 M1-560712 MI -560713 MI -560714-5 MI -560717-5 MI -560719 MI -560221
MI -560711 MI -560713 MI -560719
MI -560720 MI -560714-5 MI -560715 MI -560719 MI -560221
MI -560720 MI -560714-5 MI -560719 MI -560221
MI -560718
MI -560734
M1 Number*
560717-1 560717-2 560717-3 560717-4 560717-5 560717-6 560717-7 560717-8 560717-9 560717-10 560717-11 560717-12 560717-13 560717-14 560717-15 560717-16 560717-17 560717-18 560717-19 560717-20 560717-21 560717-22 560717-23 560717-24 560717-25 560717-26 560717-27 560717-28 560717-29 560717-30 560717-31 560717-32 560717-33 560717-34 560717-35 560717-36 560717-37 560717-38 560717-39 560717-40 560717-41 560717-42 560717-43 560717-44 560717-45 560717-46 560717-47 560717-48 560717-49 560717-50
CRYSTAL UNITS
Carrier Freq. MHz
88.1 88.3 88.5 88.7 88.9 89.1 89.3 89.5 89.7 89.9 90.1 90.3 90.5 90.7 90.9 91.1 91.3 91.5 91.7 91.9 92.1 92.3 92.5 92.7 92.9 93.1 93.3 93.5 93.7 93.9 94.1 94.3 94.5 94.7 94.9 95.1 95.3 95.5 95.7 95.9 96.1 96.3 96.5 96.7 96.9 97.1 97.3 97.5 97.7 97.9
Crystal Freq.
KHz
86.0351 86.2305 86.4258 86.6211 86.8164 87.0117 87.2070 87.4023 87.5977 87.7930 87.9883 88.1836 88.3789 88.5742 88.7695 88.9648 89.1602 89.3555 89.5508 89.7461 89.9414 90.1367 90.3320 90.5273 90.7227 90.9180 91.1133 91.3086 91.5039 91.6992 91.8945 92.0898 92.2852 92.4805 92.6758 92.8711 93.0664 93.2617 93.4570 93.6523 93.8477 94.0430 94.2383 94.4336 94.6289 94.8242 95.0195 95.2148 95.4102 95.6055
MI Number*
560717-51 560717-52 560717-53 560717-54 560717-55 560717-56 560717-57 560717-58 560717-59 560717-60 560717-61 560717-62 560717-63 560717-64 560717-65 560717-66 560717-67 560717-68 560717-69 560717-70 560717-71 560717-72 560717-73 560717-74 560717-75 560717-76 560717-77 560717-78 560717-79 560717-80 560717-81 560717-82 560717-83 560717-84 560717-85 560717-86 560717-87 560717-88 560717-89 560717-90 560717-91 560717-92 560717-93 560717-94 560717-95 560717-96 560717-97 560717-98 560717-99 560717-100
Carrier Freq. MHz
98.1 98.3 98.5 98.7 98.9 99.1 99.3 99.5 99.7 99.9 100.1 100.3 100.5 100.7 100.9 101.1 101.3 101.5 101.7 101.9 102.1 102.3 102.5 102.7 102.9
1@3.1
103.3 103.5 103.7 103.9 104.1 104.3 104.5 104.7 104.9 105.1 105.3 105.5 105.7 105.9 106.1 106.3 106.5 106.7 106.9 107.1 107.3 107.5 107.7 107.9
*Each MI consists of one crystal oven and one crystal.
THE CRYSTAL FREQUENCY IS COMPUTED AS FOLLOWS: F carrier
F crystal = 1024
3
Crystal Freq. KHz
95.8008 95.9961 96.1914 96.3867 96.5820 96.7773 96.9727 97.1680 97.3633 97.5586 97.7539 97.9492 98.1445 98.3398 98.5352 98.7305 98.9258 99.1211 99.3164 99.5117 99.7070 99.9023 100.0977 100.2930 100.4883 100.6836 100.8789 101.0742 101.2695 101.4648 101.6602 101.8555 102.0508 102.2461 102.4414 102.6367 102.8320 103.0273 103.2227 103.4180 103.6133 103.8086 104.0039 104.1992 104.3945 104.5898 104.7852 104.9805 105.1758 105.3711
4
TRANSISTOR AND IC COMPLEMENT
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 ICI 1C2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 IC11 IC12 IC13 IC14
Q101 Q102 Q103 Q104 Q105 Q106 Q107 Q108 Q109 IC101
BTE-15A FM EXCITER
Modulated Oscillator Buffer RF Amplifier RF Amplifier RF Amplifier Logic Changer Logic Changer Crystal Oven Control Divider Divider Divider Divider Divider Divider Divider Divider Divider AFC Reference Oscillator Divider Divider Phase Comparator Inverter -Amplifier
2N4427 2N4427 2N3866 2N4440 2N5102 2N3640 2N4037 2N3054 MC1027P MC1013P MC1013P MC9802P
MC890P MC890P MC890P MC890P MC890P CA3028 MC890P MC890P MC825P
CA -3018
BTE-15A MAIN FRAME
1/2 Darlington Regulator 1/2 Darlington Regulator Emitter -Follower Regulator Emitter -Follower Regulator Emitter -Follower Regulator 1/2 Darlington Relay Driver 1/2 Darlington Relay Driver Regulator Control Meter Amplifier Meter Amplifier
2N3055 2N5293
2N5293 2N3740 2N5293 2N3053 2N3053 2N3565
2N3053 CA3018
Q201 Q202 IC201 IC202
MONAURAL AUDIO MODULE
Amplifier Buffer -Amplifier Mono Pre -Emphasis Amplifier
2N3053 2N3053 CA3015 CA3015
Q301 Q302 Q303 Q304 Q305 Q306 IC301 IC302 IC303 1C304 IC306 Q404 Q405 Q406 IC404 IC407
BTS-1B STEREO GENERATOR
Buffer -Amplifier Regulator Pilot Amplifier Right Channel Buffer -Amplifier Buffer -Amplifier Buffer 76 KHz Oscillator Divider Buffer -Amplifier Right Pre -Emphasis Buffer Left Channel Buffer -Amplifier Buffer -Amplifier Buffer Left Pre -Emphasis
Buffer -Amplifier
2N4037 2N3053 2N3053 2N3053 2N3053 2N3053 CA3028 MC890P CA3018 CA3015 CA3018 2N3053 2N3053 2N3053 CA3015 CA3015
Q501 Q502 IC501 IC502 IC503 IC504 IC505
BTX-1B SCA GENERATOR
Lamp Driver Lamp Driver Amplifier -Modulator Modulated Oscillator Buffer Muting Amplifier Detector -Buffer -Trigger
2N3053 2N3053 CA3018 CA3018 CA3018 CA3018 CA3018
RECOMMENDED TEST EQUIPMENT
Description Exciter Dummy Load and Wattmeter 0-15 / 60 Watts
Audio Generator
Attenuator
Distortion and Noise Meter
Oscilloscope
Vacuum Tube Voltmeter (VoltOhmyst) Grid -Dip Meter Stereo Test Fixture One 6 foot length of RG-8 / U Cable with type N connectors BW-75A Frequency and Modulation Monitor BW-85A Stereo FM Monitor BW-95A SCA Frequency and Modulation Monitor
RCA Reference
WV -98C Figure 56 MI -560735 MI -560740 MI -560745
Other Reference
Bird Electronic Corp. Model 611 Hewlett-Packard Model 209A Hewlett-Packard Modeell 350D Hewlett-Packard Model 331A / 334A Tektronix Model 535A / 535B
Measurements Corp. Model 59
5
SCA GENERATOR
SCA GENER AlOR
BTE 15A FM E x CATER
Figure 1. BTE-15A Exciter System
DESCRIPTION
BTE-15A EXCITER SYSTEM
RCA's new FM Multiplex and Stereo System provides
on -air FM stations with an inexpensive means of
broadcasting two or more services simultaneously over their regularly assigned broadcast channel. Stations can offer background music or other services while retaining
presently scheduled FM mono or stereo broadcast programming. The use of the equipment for subsidiary
communications and stereo is type accepted by the FCC.
Excellent monaural, stereo and SCA performance that more than meets industry and FCC standards are achieved by the new RCA modular, solid-state, "Direct FM" exciter. This exciter can be substituted directly for the BTE-10C Exciter in present BTF-1E1 or BTF5/10/20C FM Transmitters and can be operated, for a reasonable period of time, into either a short circuit or open circuit without damage to the output transistor.
New design features include a modular design that plugs into a frame accommodating the Exciter, Power Supply and Switching, BTS-1B Stereo and one or two BTX-1B SCA Generator modules. When operating monaural only, the BTS-1B Stereo Generator is replaced with
another module. The exciter frame is 19 inches wide and designed for standard rack mounting. A module extender is provided to permit easy servicing of modules outside the main frame.
The heart of the system is the new Type BTE-15A Stereo Multiplex Exciter, an all solid-state unit utilizing integrated circuits, and employing RCA's "Direct FM" principle of operation. An important feature of the new exciter system is that it is fully metered using two meters to measure not only operating parameters but
also modulating signals.
Stereophonic programming requires the use of an optional plug-in Stereo Generator, Type BTS-1B. One or two Type BTX-1B Subcarrier Generators permit one or two additional program channels to be transmitted along with the regular FM mono program channel. This is accomplished by transferring the subchannel programs into the supersonic frequency range and frequency modulating the subchannel program on 41-67 KHz subcarriers. The FM supersonic carriers are then used to modulate the rf carrier. When a BTS-1B Stereo Gen-
erator is switched into the system only one BTX-1B SCA
Generator on 67 KHz can be used. A safety feature
6
prevents turning on the 41 KHz SCA subcarrier when the BTS-1B Stereo Generator is in the stereo mode.
The RCA BTE-15A FM Broadcast Exciter provides an
adjustable rf output to 15 watts at any specified
frequency between 88 MHz and 108 MHz. All applicable requirements of Section 73.322 of the FCC Rules and Regulations will be met when used in conjunction with the BTS-1B Stereo Subcarrier Generator.
The BTE-15A FM Broadcast Exciter can be used with any RCA FM Broadcast Transmitter which can be driven at carrier frequency. The exciter was designed to provide superior performance under stereophonic, monophonic and SCA conditions. In the design, particular emphasis was placed on ease of maintenance and reliable operation. Printed circuit boards have strategically located test points so that important voltages can be measured and
waveforms observed. Two front panel meters allow monitoring of audio levels and exciter functions without interrupting operation. The exciter employs integrated circuits, transistors, and other semi -conductors for reliability and long life. No vacuum tubes are employed, thereby keeping heat dissipation and power consumption to a minimum. The exciter lends itself particularly well to unattended and remote operation.
The shielding of the exciter is such that it is
unaffected by strong external rf fields and the exciter cabinet radiation is negligible. The unit is designed to fit into a standard 19 inch rack.
FM EXCITER
Refer to block diagram, Figure 3. The exciter can be
subdivided into the Modulated Oscillator, Radio Frequency Amplifier and AFC sections.
The Modulated Oscillator Q1 is a transistorized oscillator operating at the carrier frequency. Direct frequency modulation of the oscillator is accomplished by varying the oscillator tank circuit capacitance by applying audio modulation to series varicap diodes CR2 and CR3, in the oscillator tank circuit (refer to Modulated Oscillator Simplified Schematic Diagram). The junction capacitance of CR2 and CR3 will vary with the audio modulation and cause a corresponding change in the resonant frequency of the oscillator tank circuit. The carrier frequency deviation is a function of .the amplitude of the modulating frequency. Tapped inductor L5, located in the emitter circuit of Q 1, supplies the required feedback necessary to sustain oscillations. Capacitor C13 is the oscillator coarse center frequency adjustment and AFC adjust capacitor C14 (an oscillator fine frequency adjustment) is adjusted for proper functioning of the AFC circuit. The output of the oscillator is coupled from the collector of Q1 to the base of Buffer Amplifier Q2, through a 10 dB resistive attenuator. The buffer serves to isolate the oscillator from the Radio Frequency Amplifiers Q3, Q4 and Q5. Buffer Amplifier Q2 supplies an rf signal at a power level of approximately 500 mW to the rf Amplifiers. Thus, the stability and modulation characteristics of the basic direct FM oscillator are not disturbed by adjustments to the following rf power amplifiers. Q3, Q4 and Q5 amplify the 500 mW input to a level of 15 watts nominal output. The basic oscillator, buffer amplifier, and AFC circuits are mounted inside a shielded enclosure. The rf power
amplifier is contained in a separate shielded enclosure.
LEFT AUDIO INPUTS
RIGHT
BTS-113 STEREO
GEN
STEREO
-ow DIRECT FM OSCILLATOR AND BUFFER
RF
AMPLIFIER
7-15 WATTS 88-108 MHz
BTX-I8
SCA AUDIO
SCA
INPUT
GEN
SCA
67kHz
-1111
SCA AUDIO INPUT
* BTX-IB
SCA
GEN 41 k Hz
SCA
NOT USED WITH STEREO
AFC
OFF-FREQ DETECTOR
REFERENCE CRYSTAL
OSCILLATOR
OFF FREQUENCY RELAY CONTACTS TO TRANSMITTER CONTROL CIRCUIT
Figure 2. BTE-15A System, Block Diagram
SCA # I SCA #2
COMP AUDIO
I AFC ERROR I
100MHz
01
MOD/ OSC
02
BUFFER
100MHz
Q3 RF AMP
04
RF AMP
Q5 RF AMP
100MHz RF CARRIER
15 WATTS
50MHz
25MHz
12.5MHz
12.5MHz
3.1 MHz
775Kliz
194KHz
48 5KHz
12 KHz
Q6
ICI
IC2
IC3
LOGIC
=2
+2
=2
CHANGER
IC4 --IF IC5
+4
+4
IC6 +4
IC7 +4
IC8 +4
IC9
+2
REF. CRYSTAL YI
100 KHz
100 KHz
25KHz
6KHz
ICI 0 AFC REF OSC
Q7 LOGIC CHANGER
IC 1 I
+4
IC12 =4
6KHz
FREQ ADJUST
IC14 B AMP
ICI 4A AMP
ICI4C
AMP
AFC UNLOCK RELAY SIGNAL
8
A sample of rf is taken from the output of the Buffer Amplifier Q2 and applied to IC1 in the AFC circuit. IC1, IC2, and IC3 are "divided by two" circuits. The output of IC3 is approximately 12 MHz. Q6 is a logic level changer that changes the +3.5 volts (0 level) and +4.5 volts (1 level) output of IC3 to 0 volts (0 level) and +1.0 volts (1 level) respectively. IC4, IC5, IC6, IC7, and IC8
are "divide by four" circuits. IC9 divides its input frequency by 2. The output of IC9 is at a frequency of approximately 6 KHz or 1/16,384 of the center frequency of the Modulated Oscillator Q1, Q7 is the crystal controlled AFC reference oscillator. The reference oscillator operates at approximately 100 KHz and
is divided by a factor of 16 by IC11 and IC12 to about 6 KHz.
The 6 KHz reference frequency and the frequency divided output of the modulated oscillator (6 KHz) are fed to the IC13 "NOR" gate for phase comparison. In order to have a positive output out of the IC13 "NOR" gate, it is necessary that both the 6 KHz reference and the 6 KHz divided signal be negative simultaneously. As the phase between the 6 KHz reference and the divided output shifts, the percentage of time that the "NOR" gate output is positive varies. It can vary from 0% to 50% of one full 6 KHz cycle. The output signal is inverted in the second "NOR" gate in IC13 and applied to IC14 where it is amplified and reinverted to its original shape. The average collector voltage at the output of IC14 varies according to the phase relationship between the divided output of the modulated oscillator and the divided reference signal and hence, varies with the difference between the modulated oscillator frequency and the reference oscillator frequency. This voltage is applied to two AFC varicap diodes (CR8 and CR9) in the Modulated Oscillator to change the frequency of the oscillator.
Modulated Oscillator
The modulated oscillator (refer to figure 51) is a printed circuit board consisting of an oscillator, Ql, and a buffer, Q2. The oscillator is an emitter -coupled tapped -coil modified Hartley configuration operating at carrier frequency. Coil L5, capacitors C10 through 04 and varicap diodes CR2, CR3, CR8 and CR9 make up
the oscillator tank circuit.
Audio is applied to the modulated oscillator diodes CR2 and CR3 through a network composed of C4, C5, R3 and Ll Ll acts as a low-pass filter which isolates oscillator and input circuitry at carrier frequency, but passes audio frequencies readily. R3 and C5 act to improve the audio channel response for optimum stereo performance. The audio signal varies the capacitance of varicap diodes CR2 and CR3 causing the oscillator frequency to vary at an audio rate, about its center frequency. With an audio signal applied, the output of
the oscillator Q1 will vary in frequency at a rate which is
a function of the frequency of the audio modulating signal. The amount of deviation from the oscillator center frequency is a function of the amplitude of the
audio modulating signal. The bias for Q1 is derived from the 22 volt line. Zener diode CR1 in conjunction with R4, R5, and R6 provide regulated bias for the modulator diodes.
AFC control voltage (dc) is fed to the two AFC varicaps CR8 and CR9 through L4, R8 and R9. When locked, the AFC voltage can vary between approxi-
mately 0.5 volts to 4.5 volts but will usually be between 2 to 3 volts as measured at the AFC test point, TP13. R8 and C8 comprise the main AFC high frequency roll -off to prevent the AFC from removing audio modulation.
R7 and C7 form a lead network which provides an
improved AFC circuit response during frequency acquisition and lock. During acquisition CR4, CR7, R74 and R75 act as time constant bypasses to allow the AFC to
achieve lock where there is a low (but not zero)
frequency difference between the reference oscillator and the modulated oscillator. During this time the amplitude of the frequency error is large enough to overcome the 0.6 volt bias at CR4 and CR7 and the error information is conducted directly to AFC varicap diodes CR8 and CR9 by L3. After lock is achieved the diodes (CR4 and CR7) no longer conduct any error signals to the AFC diodes and the AFC time constant action is normal.
Some low frequency program modulation does appear on the AFC line, but it is low enough in amplitude so that it cannot exceed the 0.6 volt bias present across CR4 and CR7 and therefore does not have any degrading effect on the modulation amplitude or linearity. The output of the modulated oscillator is about 500 mW and is attenuated to 50 mW in a 10 dB pad composed of resistors R15, R16 and R17. The 10 dB pad gives further isolation of the modulated oscillator. The rf signal is amplified by Q2, which is a conventional Class A buffer amplifier, and fed to a matching network consisting of L7, L8 and C22. The circuit composed of R22, R23, C23 and CR10 make up a diode detector which rectifies a small sample of the divided output and applies it to the front panel meter for monitoring when the meter function switch is in the MOD OSC position. The 500
mW output of the buffer is applied to the Radio Frequency Amplifiers for additional power amplifi-
cation.
Radio Frequency Power Amplifier (RFA)
The Radio Frequency Power Amplifier consists of three RCA "overlay" transistors Q3, Q4 and Q5. The 500 mW signal from the buffer amplifier is attenuated by a 500 ohm 10 dB pad consisting of resistors R60, R61 and R62 to a level of 50 mW. In this manner,
9
isolation between the buffer amplifier Q2 and the rf
amplifier is realized. The rf signal, at a level of 50 mW, is matched to the base circuit of the first rf amplifier Q3, by L12, C59, C60 and C61. The 1.5 watt signal at the collector of Q3 is matched to the base of Q4 by L14, C66, L15 and C68. The 6.0 watt output of Q4 is applied
through a matching network consisting of L17, L18, C71, C88, C73 and C86 to the base of Q5. The output of Q5 is a nominal 15 watts rf and is applied to a three -section, pi -matching harmonic filter (L21 through L23 and C76 through C81) used to match the rf output of the rf amplifier to the final 50 ohm load.
AFC Circuit
A small sample of the rf output is fed to IC1, which is
a high speed JK flip-flop operating in the current
saturated mode. The supply voltage for IC1, IC2 and IC3 is 5 volts and is derived from the +15 volts supply thru a 100 ohm 5 watt resistor, (R56). The divided outputs of IC1, IC2 and IC8 have logic levels of +3.5 volts and +4.5
volts. The input frequency is divided by 2 in each integrated circuit. The output of IC3 is therefore about
12 MHz. Logic level changer Q6 changes the +3.5 volt
and +4.5 volt logic levels to 0 volts and +1 volt
respectively. The signal is divided by a factor of 4 in dual
JK flip-flop IC4. This process is repeated until the output of IC9 at pin 5 is the modulated oscillator
frequency divided by 16,384 (IC9 divides by a factor of 2) or approximately 6 KHz. Verification of the presence of the 6 KHz can be observed on the front panel meter
with the meter switch in the DIVIDER OUTPUT
position. When the last flip-flop of IC9 is oscillating, the average output is about 0.5 volts so that the panel meter reads half scale. If no divided output is present the meter will indicate a reading of less than 20 or more than 90.
The reference oscillator includes IC10 and the reference crystal. The crystal frequency will vary depending on the assigned carrier frequency (refer to Exciter Crystal Data Table). The crystal oscillator frequency will be about 100 KHz. The 100 KHz signal is divided by a factor of 16 for a final reference frequency of approximately 6 KHz.
Phase comparison between the frequency -divided output of the modulated oscillator signal and the reference signal is achieved in IC13, which is a "NOR" gate. A property of the "NOR" gate is that both input signals must be negative at the same time for the output
to be positive. As the phase between the 6 KHz
reference signal and frequency -divided buffer output signal shifts, the percentage of time that the "NOR" gate output is positive varies. It can vary from 0% to 50% of one full 6 KHz cycle. This signal is inverted in the second "NOR" gate in IC13. It is then amplified and reinverted to its original shape by IC14.
The duty cycle of the waveform at pin 12 (collector)
of IC14 is proportional to the phase angle between the reference signal and the modulated oscillator (buffer) divided output. Therefore, the average voltage at this point varies with phase. R52, C50, R53 and C51 act to integrate or "average" the voltage at IC14, pin 12, which is then fed through the AFC DISABLE -OPERATE switch and L4 to the modulated oscillator AFC varicap diodes. In this fashion, the modulated oscillator center frequency is phase locked to a crystal reference.
If the AFC falls out of lock, the waveform at pin 12 of IC14 will have a low frequency ac component. This ac component is coupled by C45 to the AFC error detector consisting of R44, R45, C46, C47 and CR18. The dc level out of the AFC error detector is used to actuate an "off -frequency" relay in the Main Frame assembly. This relay, K102, is also activated by lack of an output from either the reference divider or the modulated oscillator divider.
The remaining two transistors in IC14 are used as divider output amplifiers. These outputs are ac coupled, rectified into a negative voltage and referenced to the +3.6 volt supply. If a 6 KHz signal from IC13 (the divided reference signal) is fed to pin 6 of IC14, the voltage at the junction of CR14 and C42 is approximately -6 volts dc. If, however, the 6 KHz is not present, no negative voltage is developed across C42 and the junction of CR14 and C42 will rise to +3.6 volts. This causes the voltage across C47 to become positive, thereby closing the AFC unlock relay K102 located on the Main Frame Assembly. The divided modulated oscillator output is processed in the same manner as the
divided reference signal and applied across C47.
Resistors R50 and R51 make up a voltage divider which provides the panel meter AFC signal. The panel meter range is such that center scale on the meter corresponds to the center of the AFC lock range. Capacitors C49 and C50, resistors R54 and R55 and diode CR19 comprise the AFC unlock detector which operates the front panel meter when the meter function
switch is in the UNLOCK VOLTAGE position.
The crystal oven temperature is controlled by the oven thermostat. The oven thermostat switches oven control transistor Q8 from the "off" to the "on" state at intervals which are a function of oven temperature. Thus, a positive control of oven temperature is established with only a small current through the thermostat contacts. This minimizes problems with oven thermostat
contact wear, as well as noise problems. Capacitor C31 is used to slow up the oven ON and OFF time to prevent the introduction of transients into the power supply.
BTS-1B STEREO GENERATOR
Refer to block diagram of the RCA Model BTS-1B. Figure 4. The BTS-1B utilizes unique circuitry tc
10
generate the stereophonic composite waveform. A 76 KHz crystal oscillator drives an integrated circuit frequency divider to provide a frequency stable 38 KHz
stereo subcarrier. This has been done in order to minimize the possibility of cross talk into an SCA channel operating in the 67 KHz region. Further, the switching time between the left and right channels is extremely fast, generating an inherently pure stereo
signal.
Stereo Carrier and Pilot
The 76 KHz signal is generated in the crystal controlled multivibrator using IC301. Buffered and
amplified by Q301, it is then applied to the first section of the dual binary IC302. This first section delivers push-pull 38 KHz square waves which are applied to buffer amplifiers located in IC303. The outputs of these amplifiers are used to provide the carrier excitation to the series diode modulator. Refer to Figure 52.
The first half of IC302 also drives the second half of that binary, providing a square wave at 19 KHz. This is subsequently amplified by a transistor in IC303, by power amplifier Q303, and sinusoidalized by tuned circuit C311, C312 and L301. Adjusting this tuned circuit slightly one side or the other of resonance will adjust the pilot phase.
Notice that the stereo carrier and pilot waveforms have been generated by digital or switching techniques, leading to an inherently stable generator. There are no linear amplifiers in this portion of the circuitry.
Audio Channels
The two audio channels are similar: one will be discussed first and then will be compared with the second channel, which is adjustable to some extent.
Both lead to the modulator.
The audio to both channels is terminated in a resistive pad (R373 through R377 in the right channel and R473 through R477 in the left channel) and drives a trans-
former to convert from balanced or floating input
connection to an unbalanced configuration.
In the case of the left channel, the transformer feeds
IC404 to provide gain and the capability of active
pre -emphasis. The gain is controlled by the ratio of the sum of R433 and R438, divided by R430. Hence, the gain of this circuit is near unity at low frequencies. But at high frequencies, the feedback ratio is altered by the
series network of R431 in series with C414. This
network is shunted across the feedback network and so reduces the amount of feedback at higher audio frequencies. This is the method of obtaining pre -emphasis in the BTS-1B.
When 75 microsecond pre -emphasis is desired, 0413 and C414 are connected in parallel by strapping. Only C414 is connected when 50 microsecond pre -emphasis is desired, and neither capacitor is connected when flat response is wanted.
The left and right preamplifiers are matched for equal low frequency gain by adjusting the value of R329 so that the sum of R329 and R330 is equal to R430. This sets the two channel gains identical at low frequencies.
At 5 KHz the two channels are matched by adjusting the point where the pre -emphasis takes effect. This is accomplished by adjusting the point in the resistor chain where the RC network is connected. R431 and C414 are
connected to a 3300 ohm resistor, R438, which is connected to the emitter of Q404 in the left channel. The corresponding resistance is adjustable in the right
channel by adjusting R334.
Adjustment of the two channels for the same time delay is accomplished by adjusting the value of the stopping resistor. In the left channel this is fixed at 47 ohms (R431); in the right channel it is the sum of a 33 ohm fixed resistor (R331) and a 50 ohm variable resistor (R332).
This degree of matching enables the two audio
channels, including the following low-pass filters, to be matched to the point where stereo cross talk measurements of the order of 45 dB are obtainable. They are unique with this generator design.
The outputs of the two buffer amplifiers, Q304 and Q404, are fed to the two 17 KHz low-pass filters (FL301 and FL401). These filters are less than 0.5 dB down at 15 KHz, and greater than 50 dB down at 19 KHz and above. This insures an absolute minimum of disturbance to the pilot carrier and subcarrier regions by the program material. Exact equalization of time delay in the 15 KHz region is accomplished by adjustment of 15 KHz phase adjustments C330 and C421.
The outputs of the filters are terminated in their characteristic impedance by R342 and R442 and fed to
buffer amplifiers Q305 and Q405. These buffers provide outputs for monaural operation (via the individual gain controls R349 and R449). They are again applied to another pair of buffers, Q306 and Q406, to provide low -impedance drive to the switching modulator. At this
point audio output samples are taken for metering
purposes via R347 and R447.
Switching Modulator
The series diode switching modulator alternately switches between the left and right audio channels at a 38 KHz rate. The switching time is considerably less than 1 microsecond thereby providing a nearly ideal
C
76 KHz
I
76KHz OSCILLATOR
IC301
C301 PILOT FREQUENCY
BUFFER 0301
RIGHT AUDIO
LEFT AUDIO
AMPLIFIER
IC304
BUFFER
0304
R329, R332, R334
,i CROSSTALK ADJUSTMENTS
AMPLIFIER
IC404 -OM
AA,-T-MAt-
BUFFER
0404
BINARY DIVI DER
IC302
BUFFERS IC 303
FL301 17 KHz LOW-PASS FILTER
FL401 17 KHz LOW-PASS FILTER
BINARY DIVIDER IC302
BUFFER 0305
BUFFER
0405
BUFFER IC 303
POWER
AMPLIFIER 0303
PILOT
LEVEL 6322
LOW-PASS FILTER
PILOT PHASE L301
BUFFER 0306
BUFFER
0406
DIODE
SWITCHING MODULATOR
CR305 CR306 CR401 CR402
CARRIER BALANCE
R356
4
SEPARATION R359
BUFFER
IC306
R349, RIGHT MONO GAIN ADJ.
RIGHT
R449, LEFT MONO GAIN ADJ.
LEFT 6302
STEREO
0 MONO K301
FL302 55KHz LOW-PASS FILTER
BUFFER
IC407
0 OUTPUT
12
stereo signal. The switched signal is almost free from second harmonic components and so provides an inherently clean signal, a characteristic especially important in the SCA (67 KHz) region. CR305 and CR401 form a pair of "AND" gates whose inputs are the audio signals and the 38 KHz excitation. The output of the "AND" gates are summed in an "OR" gate consisting of CR306 and CR402. The summed output is then applied to a buffer amplifier (emitter follower), part of IC306.
The output of this buffer is applied to a phase -linear filter to remove the third and all higher order harmonics of the switching signal. A by-product of this filtering operation is an excess of L -R (difference) signal. This is compensated for by taking a selected amount of L+R (sum) signal and routing it around the switching modulator. This is accomplished with the aid of R354, R454, R357, R358 and R359.
At the base of IC306, Section C, Pin 2, a stereo signal is present consisting of the switched signal, switched alternately between left and right, and a corrective signal consisting of a small amount of the sum of the left and right channels. The output of this stage is applied to the 55 KHz low-pass filter, FL302, through source resistance R363. The pilot signal is added to the input of the filter through resistor R325.
The output of the filter is a high -quality stereophonic waveform which is routed, via contacts on relay K301,
to the output buffer amplifier, IC407. This direct coupled amplifier has sufficient bandwidth to maintain full stereo fidelity far in excess of FCC requirements, and provides a low -impedance source to drive the
BTE-15A FM modulated oscillator.
Monaural Operation
If monaural operation is desired, diode -relay logic is incorporated to determine which audio channel should
be used and whether the signal should be stereo or monaural. This complex function is provided by relay K301 (selecting stereo or mono), relay K302 (selecting
right or left) and diodes CR309 through CR320. Holding contacts on the relays parallel the pushbuttons in order
that only a temporary contact closure (of the pushbuttons) is required for selection of any mode. In
addition, all contacts for the signal selection are brought out on the rear of the unit for full remote control.
MONAURAL AUDIO MODULE
When the BTE-15A FM System is not used for
stereophonic transmission, the Monaural Audio Module is used to accept and process the audio input signal.
Refer to Monaural Audio Module schematic diagram,
Figure 53. Audio is routed to a resistive input pad, assuring that the driving audio processors, such as the RCA Models BA -46 and BA -47, look into a resistive
load. Following the input pad is a transformer T201, which makes possible the transition from balanced (floating) to unbalanced circuit configuration. The transformer secondary is terminated by R206.
The audio is then applied to an operational -amplifier circuit, IC201, to obtain pre -emphasis by means of frequency -selective negative feedback. This pre -emphasis is field -convertible from standard 75 to a 50 micro-
second curve, or it may be strapped with optional components for any other curve, including a flat response. Components have been added to the opera-
tional amplifier for stabilization against oscillation.
The output of this preamplifier is applied to a 17 KHz low-pass filter, FL201, which assures that no modulating components above 17 KHz are applied to
the BTE-15A FM Exciter, thereby keeping the subcarrier region free of unwanted components for superior SCA transmissions.
The output of this filter is terminated by R219 and applied to a buffer amplifier. Following this is a gain -adjustment control, R223, for vernier adjustment of the module gain. This control may be used in conjunction with the common step -type attenuators in setting the correct degree of modulation of the BTE15A, or it may be used to standardize the gain of the monaural with that of the RCA BTS-1B Stereo Generator.
The gain control adjusts the level of the program material applied to the output buffer amplifier. This
amplifier is heavily controlled with negative feedback to reduce its distortion and output impedance to very low figures. Again, appropriate stabilizing components have been added to this operational amplifier.
The actual output of the monaural audio module is either the output of the operational amplifier IC202, or an external signal, selected by switch 5201. If an external signal, such as that from test equipment or a composite studio -to -transmitter link, is applied to the WIDEBAND input jack, located at the rear of the main frame of the BTE-15A, and if the S201 is switched to the External position, then the external signal will be applied to the modulator circuitry in the BTE-15A FM exciter. Return to normal monaural programming is accomplished simply by switching S201 to Monaural.
Internal regulation of power supply voltages is accomplished by a pair of Zener diodes CR201 and CR202 on
the printed circuit board. Test points are included to facilitate maintenance checks.
BTX-1B SCA SUBCARRIER GENERATOR
Certain unique options are included in the BTX-1B which set it apart from other SCA Subcarrier Generators. One is the ease of adding radio remote control metering signals. The unit is pre -wired to include this
13
feature and the metering signals need only be applied to the rear of the unit. The signals are normally in the 20 Hz to 40 Hz range with a level about 15 dB below full modulation of the SCA subcarrier and are not audible on the subscriber's receiver.
Another unique feature is the interchangeability of the modules; the 41 KHz and 67 KHz units may be. interchanged on the main frame of the BTE-15A Exciter System and no difference will be observed. This is because of the method of wiring the SCA modules. The main frame is wired in such a manner that both audio input signals go to both SCA connectors, but only to the appropriate pins of each connector. The same technique is employed for the pre -emphasized audio sampling, the injection metering sampling and the external muting.
Test points are included on the BTX-1B for maintenance checks: black is ground, red is for the incoming 15 volt line and orange is for the regulated 10 volt line. The remaining test points follow the standard color code as the signal is traced from input to output: yellow for input audio, green for pre -emphasized audio, blue for the modulated oscillator, violet for the filter input and grey for the output. Test points are not required in the muting section because the front panel lamps provide that function.
Early SCA units employ serial numbers 1 through 999, while later units, with an improved oscillator circuit, employ serial numbers 1000 and up. These boards are directly interchangeable. In the illustrations, figures with the basic number refer to the early boards, while the boards from 1000 up have the suffix "a".
Modulated Oscillator
Refer to the BTX-1B SCA Generator Schematic Diagram, Figure 54(54a), and to the BTX-IB Simplified Block Diagram, Figure 5. Audio is applied to pins 2 and 4 of the input circuitry and is fed through the isolation pad, R501 through R505, to assure that preceding audio processing equipment, such as the BA -43/46 Limiter Amplifier and the BA -43/47 Clipper Amplifier, will see a resistive load. Following the isolation pad is an input transformer, T501, which converts a balanced (floating)
to an unbalanced configuration.
Between the transformer and following circuitry is an optional 5 KHz low-pass filter, FL501. The filter in conjunction with external audio processing equipment will prevent higher -order lower side band energy in the 67 KHz SCA signal from penetrating the stereophonic subcarrier region. The modulation control R506 terminates the 5 KHz filter. When stereo is transmitted, is recommended that the 5 KHz filter (available as MI -
560721) be installed and the input be preceded by
frequency -sensitive processing such as the RCA BA -47 clipper (normally used with a BA -43 amplifier). Devia-
tion of the SCA signal should be limited to ±4 KHz
when stereo and SCA are transmitted simultaneously.
Following the modulation control is a high -gain audio amplifier IC501 which serves to amplify the.incoming modulating signal, thereby eliminating the requirement
for a line amplifier, and to provide SCA signal pre emphasis. The pre -emphasis is obtained by virtue of frequency -selective negative feedback and is field convertible for a standard 150 microsecond or a 75 microsecond curve. The unit may also be strapped for a
flat response if desired.
The modulating signal appearing at the output of the audio amplifier (IC501, pin 12) is resistively summed with a dc frequency control voltage at the input to a buffer amplifier (part of 10501). The buffer amplifier is coupled to the modulated oscillator, IC502. The frequency of the modulated oscillator (10502) is a function of the modulating signal and of the dc control voltage. Frequency adjustment is provided by COARSE FREQ potentiometer R517 and FREQ control (vernier) R515, located on the front panel of the SCA module.
The modulated oscillator output is coupled to a series diode gate consisting of diodes CR505 and CR506. This gate is keyed on and off by a signal from the muting amplifier. The filter (between IC503 terminal 11 and 10503 terminal 6) removes subcarrier harmonics, leaving only the fundamental components. The output of the filter is applied to a buffer amplifier, part of IC503, and then to the output by way of output level adjustment R546.
Muting Circuits
The audio preamplifier drives not only the modulated oscillator but also the muting system. The first section of 10504 is used as a buffer to derive a sample of the
pre -emphasized audio to be routed to the metering amplifier printed circuit board (located on the BTE-15A Main Frame). Part of the load impedance for the buffer
is the muting sensitivity adjustment R558.
Audio from the muting amplifier (second and third transistor portion of IC504) is fed to a voltage doubler, CR507 and CR508, which drives the first transistor portion of IC505, charging storage capacitor C533. The storage capacitor will charge rapidly with program material applied but has a long discharge time, through DELAY potentiometer R587. The voltage across capacitor C533 is applied to a buffer transistor (the second section of IC505) and then to a Schmitt trigger using the third and fourth sections of IC505. When the input audio level exceeds a certain value, the voltage across C533 rises above a reference level, causing the Schmitt trigger circuit to "fire" and key ON the series diode gate CR505 and CR506 and key the lamp drivers to give a
visible indication of the subcarrier status. An RC network consisting of R579, R580, C535 and diode
CR509 shape the rise and fall time of the Schmitt trigger output.
1501 INPUT
MI -560721
5KHz LPF (OPT)
HIGH GAIN AUDIO AMPLIFIER (PRE -EMPHASIS INCLUDED)
AMP IC501A
AMP
IC50IB
AMP IC50I C
MODULATOR IC5010
SCA MODULATED
OSC
IC502B IC502C
MUTING GATE CR505 CR506
BUF
IC503A
SUB CARRIER
FILTER
BUF
IC503B
R546 OUTPUT LEVEL
OUTPUT
TELEMETRY INPUT
MUTING AMP
AMP 105040
R558
MUTING #4 SENS
AMP
IC504B
AF METER OUTPUT
2K029
AMP
IC504C
R5I5
- FREQ
FREQ
CONTROL
I C502A
VOLTAGE DOUBLING RECTIFIER
CR507 CR508
MUTE DET
IC505A
BUF
IC505B
MUTE DELAY R587
MUTING SIGNAL
SCHMIDT TRIGGER IC505C IC505D
4AS SHOWN IN UNITS WITH SERIAL NUMBERS BELOW 1000. IN UNITS WITH SERIAL NUMBERS 1000 AND UP, IC502A IS NOT USED.
CR511
BUF IC503C
INJECTION METERING
OUTPUTS
LAMP DRIVER Q501
SCA ON DS501
LAMP DRIVER
0502
SCA OFF DS502
STEREO SCA MUTE
K
EXT
< SCA
MUTE
15
BTE-15A MAIN FRAME
The main frame power supply transformer T101 includes a split and tapped primary for use with 120 or 220 volt primary power. The secondary of the transformer has three windings which deliver after rectification +40V, +20V, -20V, and +5V dc supply voltages. The 40 volt output is regulated to +22 volts by Q101, Q102 and Q108. Q101 and Q102 are used as an emitter -follower, Darlington series pass element, the output of which is controlled by Q108. Zener diode CR106 holds the emitter of Q108 at a fixed reference potential. The output of Q101 is divided down by R106, R107, and R108 and fed to the base of Q108. The difference appears at the collector of Q108 and controls the output of Q101. Adjustment of the output voltage is
achieved by R107.
The +20 volt dc output is regulated to +15 volts dc by Q103 acting as an emitter -follower regulator. CR107 is the +15 volt dc reference, and the reference source is the +22 volt supply.
The -15 volt dc supply and +3.6 volt supply operate in the same manner as the +15 volt dc supply. The -15 volt dc supply, however, uses a PNP transistor as a regulator and its own -20 volt input as a reference source.
Off -frequency Shutdown Circuit
An off -frequency detector is incorporated in the design of the BTE-15A FM Exciter. When the basic oscillator frequency is not phase locked to the reference crystal, an ac component appears at the AFC output. This voltage is rectified to operate a relay whose contacts can be used to turn off the FM transmitter.
Q106 and Q107 operate as relay drivers for K102, the AFC Unlock relay. If a phase lock is not realized in the AFC circuitry, a positive voltage is applied to the base of
Q107. This turns on Q106 and closes K102. The contacts of K102 can be used to control the output of
the FM transmitter.
CB101 is a magnetic breaker intended to be used as both an ON -OFF switch and overload protection for the power line.
K101 is the remotely operated rf power ON -OFF relay which applies +22 volts to the rf amplifier through F101, S103 and R101. F101 protects the power supply from shorts in the rf amplifier circuitry. F101 also protects the rf amplifier from overvoltage. If Q101 should short circuit, applying +40 volts to rf amplifier circuitry, CR101 will conduct heavily and draw enough current through F101 to open it. S103 is a front panel ON -OFF switch for the rf amplifier. R101 is the front panel rf power output control. Only the power to the
last two rf amplifier stages is controlled by R101. This prevents spurious outputs which might be caused by operation of amplifiers at low collector voltages.
Two multimeters are located on the hinged door in front of the regulated power supply section. One of these meters is used to indicate power supply and operating voltages within the exciter and three stage rf Amplifier. The second meter is a peak -reading voltmeter that is used to indicate key modulating signals.
S101 is the monitor meter (M101) selector switch. Position 1 is the EXTERNAL METERING position, and the meter leads are directly available at J101, pins 3 and
4.
The modulated oscillator (MOD. OSC) position indicates the detected output of the oscillator buffer chain (Q1 and Q2).
The XTAL OSC position measures the collector voltage on the last binary (IC9) in the reference frequency (crystal oscillator) divider chain. If the indication is approximately center scale, both the oscillator and the oscillator divider chain are operating. If not, the
meter will read either less than 20 or more than 90.
The DIVIDER OUTPUT position samples the collector voltage of the last binary in the modulated oscillator divider chain. Again, if the indication is approximately center scale, operation is normal. If the dividers are not functioning normally, the reading will be less than 20 or more than 90.
The AFC VOLTAGE position measures the output of the AFC circuitry which is used to drive the AFC varicap diode in the modulated oscillator. It should read approximately center scale and be controllable by the
AFC ADJUST knob (C14) on the front of the FM
exciter module.
The UNLOCK VOLTAGE position indicates the
presence of an AFC unlock voltage if present.
The BUFFER INPUT position reads the base bias developed on the first rf amplifier transistor Q3.
The DRIVER CURRENT position measures the collector current of the second rf amplifier transistor. The POWER AMP CURRENT position similarly measures the third and last rf amplifier collector current. The POWER AMP VOLTAGE position indicates the supply voltage to the last two rf amplifier transistor
stages.
The POWER AMP OUTPUT position monitors a small sample of the rf voltage at rf output connector J2. The indication is affected by VSWR and can be used as a reliable indication of power output only when the output is terminated by a 50 ohm resistive load. C105,
16
C106, L101 and L102 comprise a power line input filter which prevents leakage of rf either into or out of the unit via the line cord.
Meter Amplifier
The audio and SCA modules in the BTE-15A FM Exciter System provide outputs for sampling audio and program levels and relative SCA injection. These are routed to the calibration controls near the front of the metering amplifier circuit board, located in the power supply compartment, and then to the selector switch S102. S102 selects which sample is to be applied to the metering amplifier.
The metering amplifier itself consists of a 5 -stage circuit. The first stage is of relatively high input impedance and high gain. This is followed by a second stage, designed for somewhat lower gain, good linearity and low output impedance. This second stage is followed by a pair of emitter followers, (Darlington configuration) for current amplification. The second of these emitter followers, the fourth section of IC101, is coupled through blocking capacitor C121 to power amplifier Q109. Q109 is forward biased by means of
temperature -sensing diode CR116. The non-linear transfer characteristic of Q109 results effectively in rectifi-
cation of the audio signal. Positive peaks therefore charge capacitor C122 to the peak value of the selected waveform. To accomplish rapid charging of C122 large values of current are required, and this is the reason for the large amount of current amplification in the amp-
lifier.
Capacitor C122 can discharge only through resistor R126 via the meter M102. This discharge rate has been chosen to approximately follow the audio envelope; the resulting meter movement is similar to the station's modulation monitor or typical VU meter. However, because of the extremely rapid charging rate possible, the system will respond correctly to very short program signal bursts. Further, because the transient signals are routed around the meter multiplier resistor R126 by capacitors C123 and C124, the actual meter movement is accelerated, especially on the upswing. R127 critically damps the meter and so controls the overshoot.
More sophisticated than an elementary VU meter, this peak -reading multimeter with its complete system monitoring capability enables the broadcaster to accurately measure parameters in the BTE-15A heretofore measured only by oscilloscopes or similar complex equipment.
INSTALLATION
MAIN FRAME
The BTE-15A main frame is 19 inches wide and 10-1/2 inches high and is designed for standard rack mounting. All connections are made to the rear of the unit. It houses the FM Exciter, Stereo Generator (or Monaural Audio Module), and one or two SCA Genera-
tors (or SCA Generator Blank Panels). It may be
operated with 117V, 208V or 240 volts 50/60 Hz input.
CAUTION
Make certain that T101 is properly connected for the voltage input at J103. Refer to Figure 55.
Connections
1. Terminate the exciter rf output jack J2, using a suitable 50 ohm dummy load (this may be the transmitter rf input circuit).
2. If necessary, change primary connections to exciter power transformer T101, for operation at the available line voltage. See Figure 55. AC line power is applied to exciter main frame power connector J103.
NOTE: In RCA BTF-5E1, BTF-10E1, and BTF-20E1 FM transmitters, exciter AC line voltage should be connected at transmitter terminals 1TB1 -13 and I TB1-14.
3. To secure rf output it is also necessary to energize the coil of remote power "ON -OFF" relay K101. The relay normally supplied incorporates a 240 volt operating coil, which is operated by application of 240 volts
(AC) to exciter terminals J101-1 and J101-2. This voltage is supplied in RCA BTF-5E1, BTF-10E1, and
BTF-20E1 transmitters when transmitter connector 1P5 is connected to exciter connector J101.
NOTE: If 240 volts AC is not available to operate K101, other voltages may be used, provided that a new relay (K101) is substituted which is compatible with the voltage used (at J101-1 and J101-2).
4. Power output should now be available from the exciter when RF OUTPUT switch S103 is set to the ON position. The rf power output may be set by simply varying the setting of RF POWER ADJUST rheostat R101.
17
FM EXCITER
The BTE-15A FM exciter is mounted in and receives power from the main frame. All connections are made to the main frame including input and output connections.
STEREO GENERATOR
The BTS-1B stereo generator is mounted in the main
frame of the BTE-15A exciter system or it may be
mounted in a special smaller frame by itself, as a retrofit for the BTS-1A stereo generator. In either case, power is derived from the main frame. All connections are made to the main frame, including power, remote control
connections (if used), audio input(s) from the signal source or audio processors and the output connection.
SCA GENERATOR
The BTX-1B SCA generator is normally mounted in the main frame of the BTE-15A exciter system or it may be mounted in a special smaller frame by itself, as a retrofit for the RCA BTX-1A SCA generator. In either
case, power is derived from the main frame. All connections are made to the main frame including
power, remote control connections (if used), audio input
from the signal source or audio processors and the output connection, either the subcarrier itself or the
complete output of the BTE-15A exciter.
TUNING
BTE-15A RF AMPLIFIER (RFA)
NOTE: This is not a complete tuning procedure. It is to be used only following a transistor replacement or other malfunction such that the RFA is known to have been
operating properly at one time. If it is
desired to alter the frequency to which the exciter is tuned, it is recommended that the unit be returned to RCA for this purpose.
1. Disconnect the BTE-15A from the transmitter and conneQt it through a wattmeter to a 50 ohm dummy load of 25 watts or greater power handling ability.
2. Mount the exciter drawer on the extender and loosen the two nuts on either end of the RFA. Rotate the RFA toward the rear and remove the cover plate to expose the RFA tuning adjustments.
CAUTION
Use only a completely insulated tuning tool.
3. Apply power to the exciter and turn the POWER control fully clockwise.
NOTE: The RFA has been previously tuned. Therefore, it should not he necessary to turn any control more than 10° from its original
position. It might be well to mark the
original positions before beginning to adjust the unit.
4. The interstage matching networks each contain two controls which must be adjusted as a pair, for an
optimum condition. This is done as follows:
A. Adjust one of the capacitors in a pair for a
maximum of power output as read on the wattmeter.
B. Slightly detune the other capacitor of the pair to reduce the power out by 2-3 watts.
C. Adjust the first capacitor again for a peak in power. If this peak is greater than the previous one,
again slightly detune the second capacitor in the same direction as before.
D. Repeak the first capacitor and continue this procedure until no further improvement can be
noted.
If the first readjustment resulted in a lower power
out, the second capacitor should be detuned the
opposite way.
When tuning the RFA it is important to start at the beginning and work straight through. DO NOT GO BACK. When all adjustments have been made, go back to the beginning and go straight through a second or third time, until no further improvement can be noted. A minimum expected power output after this procedure is 17.5 watts.
The capacitor pairs to be adjusted are, in order, C59 and C61, C66 and C68, C71 and C73.
Do not adjust the six output matching capacitors unless the previous procedure fails to produce a minimum of 17.5 watts output.
These capacitors are also adjusted in pairs, as follows: C76 and C77, C78 and C79, C80 and C81.
The RFA now has optimum power output. All that remains is to broad -band it and verify stability.
18
Apply 100 Hz sinusoidal modulation of sufficient amplitude to modulate the exciter 133%.
Place the EXCITER MULTIMETER switch in the
PWR AMP OUTPUT position.
Connect an oscilloscope so that the Y axis is deflected by voltage between C83 on the RFA and ground, and the X axis is deflected by the 100 Hz modulation input.
The audio oscillator, Exciter, and Oscilloscope now form a sweep generator and detector. The more nearly horizontal and flat the scope trace, the better the RFA tuning.
Go through the RFA as previously described,
adjusting the coupling networks very slightly for a flat, horizontal scope trace, simultaneously watching the wattmeter to see that power out does not drop below 15 watts.
After a preliminary adjustment has been made, slowly turn the POWER control towards minimum, simul-
taneously watching the scope trace. The amount of incidental AM (shown by tilt or bumps in the scope trace) will change. It is necessary to adjust the RFA so that a compromise condition is reached, and the
incidental AM is not too severe at any power level.
When adjusting power out and observing the scope, if
any "stairsteps", or discontinuities are noted at any power level, adjust the RFA so as to eliminate them. They represent instabilities due to improper tuning and must not be present at any power setting when tuning is
completed.
As a final adjustment to flatten the passband of the RFA, slightly tune C22 for minimum incidental AM.
When tuning is complete, the BTE-15A should deliver at least 15 watts in a 50 ohm dummy load. The sweep output on the oscilloscope should be reasonably flat at all settings of the POWER control, and there will be no discontinuities in the sweep response at any power level.
BTS-1B STEREO GENERATOR
NOTE: To obtain an L=R stereo signal, feed
the LEFT and RIGHT audio channels from a
common audio generator and connect in
phase. To obtain an
stereo signal
reverse one channel so that the RIGHT and
LEFT audio are 180° out of phase. The
circuit diagram for an easily fabricated test
fixture, which may be employed to facilitate
stereo tests, is given in Figure 56. An RCA
Type BW-85A Stereo Modulation Monitor is
recommended for the following tests.
1. Set all controls and adjustments on the BTS-1B Stereo Generator to the maximum counterclockwise position.
2. Set PILOT LEVEL (R322, Front Panel) at
minimum.
3. Read the 38 KHz TEST position on the BW-85A monitor and adjust the BTS-1B CARRIER BALANCE control (R356, Front Panel) for a 38 KHz null.
4. Set the BW-85A function switch to the TOTAL MODULATION position and apply a 50 Hz L=R audio input.
5. Adjust the audio level so that the BW-85A monitor reads 90% on the TOTAL MODULATION range and then turn the BW-85A FUNCTION selector to the L -R position and observe the level indicated on the monitor.
6. Adjust the 50 Hz ADJ CONTROL (R329, on printed circuit board) for null as indicated by the
monitor while in the L -R MODULATION position.
7. Change the frequency of the audio generator to 5 KHz but leave the audio phase conditions set for L=+R. Set the audio generator level to read 90% modulation as indicated in the TOTAL MODULATION position on the monitor.
8. Adjust 5 KHz ADJ CONTROL (R334, on PC board) for null as read in the L -R MODULATION
position on the BW-85A monitor.
9. Set the frequency of the audio oscillator to 15 KHz while still feeding the audio in the L=+R phase. Set
the level of the audio oscillator to indicate 90%
modulation as read in the TOTAL MODULATION
position of the BW-85A monitor.
10. Set the 15 KHz ADJ CONTROL (R332 on PC Board) for null as indicated in the L -R position of the stereo monitor.
11. Both the 5 KHz ADJ and 15 KHz ADJ adjustments should be rechecked for best null as
indicated in the L -R MODULATION positon of the monitor.
1 2. Set the frequency of the audio generator to 5 KHz and leave the phase of the audio in the L=+R condition.
13. Adjust 50 Hz ADJ for null as indicated in the L -R MODULATION position of the stereo monitor FUNCTION switch.
14. Set the SEPARATION control (R359, on the
Front Panel) to minimum resistance (CCW).
19
15. Set the audio generator to 10 KHz and switch the phase of the audio to L= -R. Set the signal generator level to read 90% modulation on the BW-85A monitor as indicated in the TOTAL MODULATION position.
16. Adjust SUB to MAIN (R357, on PC Board) ,for null as indicated in the L+R MODULATION position of the stereo monitor.
17. Turn the FUNCTION selector switch on the stereo monitor to the PILOT MODULATION position and set PILOT LEVEL (R322, on the Front Panel) to
read approximately 5% modulation.
18. Adjust the PILOT PHASING (L301, on PC Board) for maximum on the meter as indicated in the PILOT MODULATION position on the stereo monitor. Readjust the PILOT LEVEL control for 10% injection.
19. Feed LEFT only at 13 KHz to the stereo generator and adjust the input level of the audio
generator to produce 100% modulation as indicated in the TOTAL MODULATION position on the BW-85A monitor.
20. Switch the monitor FUNCTION switch to the L+R MODULATION postion. Read and note the level
indicated.
21. Switch the FUNCTION selector to the L -R MODULATION position and note this reading. Adjust
the SEPARATION control (R359, on Front Panel) until the level indicated agrees with the level indicated in step 20. At this time switching between L+R and L -R on the stereo monitor FUNCTION switch should produce the same indication on the meter.
22. Readjust the audio level for 100% modulation as indicated in the TOTAL MODULATION position on the
stereo monitor. Switch to the RIGHT channel only
position and read the separation.
NOTE: If a BW-85A stereo monitor is used, verify that the monitor phase adjustment is optimum. See monitor alignment procedure for details.
23. Carefully adjust SEPARATION control (R359) and PILOT PHASE control (L301) for best separation.
24. Adjust FILTER TERMINATION (R366, on PC Board) for best separation. Stereo separation should be 33 dB or better.
25. With no audio input applied and the AUDIO MULTIMETER switch set to PROGRAM OUTPUT, check that there is no deflection on AUDIO MULTIMETER M102. If necessary, adjust METER
ZERO control R129.
26. Set the audio generator frequency to 400 Hz. Set the level to 10 dBm. Push the LEFT monaural button on the front panel of the stereo generator.
27. Adjust the LEFT MONO GAIN control (R449, on PC Board) for 100% modulation as read with the BW-85A FUNCTION switch set to the TOTAL MODULATION position.
28. Move the output of the audio oscillator to the RIGHT input connector and press the RIGHT monaural button on the front panel of the stereo generator.
29. Adjust the RIGHT MONO GAIN control (R349,
on PC Board) for 100% modulation, read with the BW-85A FUNCTION switch set to the TOTAL
MODULATION position.
30. Switch the stereo generator to the STEREO mode and apply a 400 Hz L=R signal. Set audio generator level to produce 100% modulation as read
with the BW-85A FUNCTION switch set to the TOTAL MODULATION position.
31. With the AUDIO MULTIMETER switch (on
BTE-15A main frame) set to the LEFT AUDIO (MONO) position, set calibration control R136, designated LEFT
CAL, for an indication of 0 dB on AUDIO MULTIMETER M102. Calibration control R136 (and other associated calibration controls) are located on the meter amplifier and power supply regulator printed
circuit board in the main frame.
32. Set the AUDIO MULTIMETER switch to the RIGHT AUDIO position. Adjust calibration control R135, designated RIGHT CAL, for an indication of 0 dB
on AUDIO MULTIMETER M102.
33. Set the AUDIO MULTIMETER switch to the PROGRAM OUTPUT position. Adjust PGM CAL control R134 for an indication of 0 dB on AUDIO
MULTIMETER M102.
BTX-1B SCA GENERATOR
1. If both stereophonic and SCA operation are planned, it is recommended that the optional 5 KHz
low-pass filter (MI -560721) be included in the BTX-1B SCA Generator. This unit immediately follows input transformer T501, when supplied. Use of this filter prevents higher -order lower sideband energy in a 67 KHz SCA signal from penetrating the stereophonic subcarrier region. This filter is available as optional MI -560721. Installation details for MI -560721 are shown in Figure 57.
NOTE: The following SCA Generator Adjustment procedure requires the use of an FCC approved multiplex monitor, such as the RCA BW-95A.
20
2. Set the front panel control switch S501 to the ON position. This holds the subcarrier on regardless of whether or not there is audio modulation present.
3. Adjust front panel control R515 (designated FREQ) for the proper SCA subcarrier frequency. If necessary, reset coarse SCA subcarrier frequency control R517 as required. This adjustment should be made without modulation applied to the SCA generator.
4. Adjust the SCA Generator output level control R546 (designated OUT on the front panel) for the desired degree of injection to the BTE-15A (or other) exciter. Injection is usually set at 9 to 10% when stereo is transmitted and 10 to 20% with monaural signals. With monaural programming the arithmetic sum of the modulation of the main carrier by SCA subcarriers should not exceed 30 percent.
5. With the AUDIO MULTIMETER switch (on BTE-15A main frame) set to the SUB 1 INJECTION
position, set calibration control R132, designated SCA 1
INJ, for an indication of 0 dB on AUDIO MULTI METER M102. Calibration control R132 (and other associated calibration controls) are located on the meter amplifier and power supply regulator printed circuit
board in the main frame.
6. Now apply audio modulation to the SCA channel. Set the SCA monitor for measurements on the SCA subcarrier frequency in use. Advance the MOD control (R506, at SCA Generator front panel) until the SCA monitor modulation meter indicates the desired degree of deviation of the subcarrier. Where the BTX-1B is used in conjunction with a BTE-15A exciter, the exciter AUDIO MULTIMETER switch should be set to the SUB 1 AUDIO position. The AUDIO MULTIMETER should indicate near the zero dB calibration mark. If not, reset the SUB 1 MOD control R133 as required.
7. Note that the AUDIO MULTIMETER on the BTE-15A is peak -reading, and will respond correctly to the instantaneous value of modulation regardless of modulating waveform, whether it be a sine wave or
program material.
8. If two SCA channels are to be used, repeat steps 2, 3, 4, 5 and 6 for the second SCA generator. In this
case the AUDIO MULTIMETER switch is set to the SUB
2 INJECTION and SUB 2 AUDIO positions and control R130, designated SCA 2 INJ, is used to calibrate the AUDIO MULTIMETER (with the AUDIO MULTI METER switch set to the SUB 2 INJECTION position) and R131 (SUB 2 MOD) is used to normalize the audio multimeter reading (in the SUB 2 AUDIO position of the meter switch).
Couple the BTX-1B output to an SCA receiver, or alternatively, if preferred, the normal BTX1B / BTE-15A combination may be used, with a suitable
main channel demodulator included.
Switch the BTX-1B control switch to the AUTO position. Adjust the DELAY control, R587, until the receiver handles the signal as smoothly as possible. It is suggested that a delay of between 1 and 2 seconds be used. This control adjusts only the time lag between
disappearance of audio and the muting of the subcarrier: It does not control the subcarrier envelope rise and fall
time.
Each BTX-1B SCA generator is supplied with an MI 560721 5 kHz low pass filter, installed. When stereo is
transmitted, it is strongly suggested that the SCA generator audio input be preceded by frequency -sensitive processing equipment such as the RCA BA -47 Clipper, to prevent higher -order lower sideband SCA components from penetrating
occupied by the stereo signal.
Deviation of the SCA signal should be limited to ±4 KHz when stereo and SCA are transmitted simul-
taneously.
TYPICAL PANEL METER READINGS
Pout
Meter Position
15 W
10 W
MOD OSC
43
43
XTAL OSC
65
65
DIVIDER OUTPUT
55
55
AFC VOLTAGE
60
60
UNLOCK VOLTAGE
4
4
BUFFER INPUT
24
20
DRIVER CURRENT
35
30
PWR AMP CURRENT
48
37
PWR AMP VOLTAGE
40
32
PWR AMP OUTPUT
48
36
Note: Readings taken with exciter terminated in a 50 ohm dummy load.
21
TYPICAL WAVEFORMS, BTS-1B STEREO GENERATOR
1. Waveforms taken with a Tektronix Type 531A oscilloscope with type H plug-in and 10x probe. The Tektronix Type 535A, 535B or equivalent may be used.
2. Squares on graticule equal 1 centimeter (horizontally and vertically); µsec/cm refers to sweep time base, and V/cm refers to vertical calibration.
GROUP 1
400 Hz audio fed to left stereo generator input (J109). No signal input to right stereo generator input (J110).
Audio level set for ±75 kHz deviation of carrier, including 9% pilot. Stereo mode.
*TP408 (yellow); Left Input 1 V/cm, .5 ms/cm
Sync: Ext. audio generator
*TP409 (yellow); 17 kHz Filter Input *TP410 (yellow); 17 kHz Filter Output
1 V/cm, .5 ms/cm
1 V/cm, .5 ms/cm
Sync: Ext. audio generator
Sync: Ext. audio generator
TP411 (white); Composite Output 1 V/cm, .5 ms/cm
Sync: Ext. audio generator
TP301 (yellow); 76 kHz 2 V/cm, 10 µsec/cm
Sync: Ext. from TP304
TP302 (green); 38 kHz #1 2 V/cm, 10 µsec/cm
Sync: Ext. from TP304
TP303 (green); 38 kHz #2 2 V/cm, 10 µsec/cm
Sync: Ext. from TP304
TP304 (blue); 19 kHz 2 V/cm, 10 µsec/cm Sync: Ext. from TP304
Junction of L301 and R325; Pilot Signal 1 V/cm, 10 µsec/cm
Sync: Ext. from TP304
*With a signal input to the right stereo generator input (J110), these waveforms will appear at TP308, TP309 and TP310.
Figure 5a. Typical Waveforms, BTS-1B Stereo Generator
22
TP311 (green); Switch .5 V/cm, 10 psec/cm Sync: Ext. from TP304
TP311 (green); Switch .5 V/cm, .5 ms/cm
Sync: Ext. audio generator
TP312 (blue); Switch .5 V/cm, 10 µsec/cm Sync: Ext. from TP304
TP312 (blue); Switch .5 V/cm, .5 ms/cm Sync: Ext. audio generator
TP313 (violet); Unfiltered Stereo .1 V/cm, .5 ms/cm
Sync: Ext. audio generator
TP314 (gray); 55 kHz Filter Output .1 V/cm, .5 ms/cm
Sync: Ext. audio generator
TP411 (white); Composite Output 1 V/cm, .5 ms/cm
Sync: Ext. audio generator Waveform showing insufficient
amplitude of L -R signal.
immuisimium
low
Illik
111111111111111111111M11
TP411 (white); Composite Output 1 V/cm, .5 ms/cm
Sync: Ext. audio generator
Waveform showing excessive amplitude of L -R signal.
TP411 (white); Composite Output 1 V/cm, .5 ms/cm
Sync: Ext. audio generator Waveform showing effect of extreme overmodulation; input level increased to give more than 200% modulation.
Figure 5a (continued). Typical Waveforms, BTS-1B Stereo Generator
23
GROUP 2
400 Hz audio fed to left (J109) and right (J110) stereo generator inputs, phased such that L= -R. Audio level set for ±75 kHz deviation of carrier, including 9% pilot. Stereo mode.
TP411 (white); Composite Output 1 V/cm, .5 ms/cm
Sync: Ext. audio generator Normal L -R waveform
TP411 (white); Composite Output .1 V/cm, 50 µsec/cm
Sync: Ext. audio generator Photo to left expanded to show
waveform when pilot phase is properly adjusted.
TP411 (white); Composite Output .1 V/cm, 50 psec/cm
Sync: Ext. audio generator Photo to left expanded to show
waveform when pilot phase is misadjusted.
GROUP 3
400 Hz audio fed to left (J109) and right (J110) stereo generator inputs, phased such that L=R. Audio level set for ±75 kHz deviation of carrier, including 9% pilot. Stereo mode.
MMOMMEMOMM
FAMMeEnMdWM. AIM
CA
TP411 (white); Composite Output 1 V/cm, .5 ms/cm Sync: Ext. audio generator Normal L+R waveform.
GROUP 4
9% pilot injection (9% modulation of carrier due to pilot).
Stereo mode.
TP411 (white); Composite Output .1 V/cm, 10 µsec/cm
Sync: Ext. from TP304 No left or right input, normal pilot
TP411 (white); Composite Output .1 V/cm, 10 psec/cm
Sync: Ext. from TP304 Left only input at J109; audio level set
TP411 (white); Composite Output .1 V/cm, 10 psec/cm
Sync: Ext. from TP304 Right only input at J110; audio level set
only signal without modulation.
for 15% modulation of carrier, including 9% pilot. This waveform
may be used to identify the left channel.
for 15% modulation of carrier, including 9% pilot. This waveform
may be used to identify the right channel.
Figure 5a (continued). Typical Waveforms, BTS-1B Stereo Generator
24
PARTS ORDERING INFORMATION
REPLACEMENT PARTS
Replacement parts bearing a Stock Number should
be ordered by Item, Description, and Stock Number from RCA, Distributor and Special Products Division, Deptford, New Jersey 08096. Items listed under a Master Item (MI) Number should be ordered from RCA, Commercial Communications Systems Division, Camden, NJ 08102.
Because of possible products modifications and/or the unavailability of parts, the item which will be supplied against an order for a replacement part may not be an exact duplicate of the original part. As a result, some of the replacement parts received may require a mount-
ing modification of the customer's design. In some cases,
parts and/or instructions for adapting the substitute parts will be supplied. In no way will the substitute parts impair the operation or performance of the equipment.
For information regarding the use of any parts received, write RCA, Tech Alert, Bldg. 2-8, Camden, NJ 08102, or call (609) 963-8000 Extension PC -3434.
EMERGENCY PART SERVICE
For emergency part service after working hours, contact RCA Distributor and Special Products Division, Telephone 609-963-8000 or 609-848-5900.
LOCATION Continental United States, including Alaska and Hawaii
Dominion of Canada
Outside of Continental United States, Alaska Hawaii, and the Dominion of Canada
ORDERING INSTRUCTIONS Replacement Parts bearing a STOCK NUMBER should be ordered from RCA Distributor and Special Products Division - 2000 Clements Bridge Road - Deptford, NJ 08096. Replacement Parts bearing a MASTER ITEM (MI) NUMBER should be ordered from
RCA, Commercial Communications Systems Division - Camden, NJ 08102 or your nearest RCA Regional Office.
Replacement Parts with NO STOCK or MASTER ITEM (MI) NUMBER are standard components. They are not stocked by RCA and should be obtained from your local electronics distributor.
Order from your local RCA Sales Representative or his office or from: RCA Victor Limited, 1001 Lenoir Street, Montreal, Quebec.
Order from your local RCA Sales Representative or from: RCA International Division, Clark, NJ - U.S.A. - Wire: RADIOINTER
Emergency: Cable RADIOPARTS, DEPTFORD, NJ
25
Symbol
Stock No.
REPLACEMENT PARTS
Drawing No.
Description
BTE-15A FM EXCITER ES -560631
BTE-15A RF EXCITER UNIT MI -560712 P/L 3720225-601 REV 4
1
CI C2 C3 C4
C5 C6 C7 CA C9 CIO C11 C12 C13 C14 C15 C16 C17 CIA C19 C20 C21 C22 C23 C24 C25
C26 THRU C30
C31 C32 C33 C34 C35 C36 C37 C38 C39 C40
C41 THRU C44
C45 C46 C47 C48 C49 C50 C51
C52 THRU
C58 C59 C6o C61 C62 C63 C64 C65 C66 C67 C68 C69
C70
240846 240846 240846 423738 244247 107323 249941 423736
423739 244392 244329 244329 245164 245165 107323 245166 107323 107323 248251 107323 107323 245164 240846 107323 427229
245167 245168 219661 240846 240846 240846 127801 127801 423664 239235 426768
127801 245163 248374 245163 127801 423739 247837 247837
245167 245171 245166 245171 245167 245167 432444 425984 245171 245167 245171 245167 432444
3456736-
BTE-15A RF EXCITER UNIT
CAPACITORS
CERAMIC, .001 MF 1000 V CERAMIC, ;001UF 1000 V CERAMIC, ;001UF 1000 V TANTALUM, 33 MF 4 V CERAMIC, 22 PF 1000V CERAMIC, 270 PF 1000 V CERAMIC, 0,47 MF 50V TANTALUM, 2,2 MF 20 V
CERAMIC, ..22UF 35V CERAMIC, 15 PF N750 (NOMINAL) CERAMIC, 15 PF NPO (NOMINAL) CERAMIC, 15 PF NPO (NOMINAL) VARIABLE, 2.4-24.5 PF 500V VARIABLE, 1-13 PF CERAMIC, 270 PF 1000 V CERAMIC, 33 PF NPO CERAMIC, 270 PF 1000 V CERAMIC, 270 PF 1000 V ELECTROLYTIC, 150 MF 15 V CERAMIC, 270 PF 1000 V CERAMIC, 270 PF 1000 V VARIABLE, 2.44424,5 PF 500V CERAMIC, .001 MF 1000 V CERAMIC, 270 PF 1000 V ELECTROLYTIC, 15000F AT 25V
CERAMIC, .001 MF 500 V ELECTROLYTIC, 100 MF 20V MICA, 10 PF 500 V CERAMIC, ;001 MF 1000 V CERAMIC, .001 MF 1000 V CERAMIC, .001 MF 1000 V CERAMIC, ;01 MF 100V CERAMIC, ,01 MF 100V ELECTROLYTIC, 1 MF 35 V VARIABLE, 3-34 PF FILM .0182 MF 2% 100V
CERAMIC, .01 MF 100V ELECTROLYTIC, 22 MF 20 V FILM, .022 MF 2% 100 V ELECTROLYTIC, 22 MF 20 V CERAMIC, .01 MF 100V ELECTROLYTIC, 0.22 MF 35 V ELECTROLYTIC, 0.1 MF 35 V ELECTROLYTIC, 0.1 MF 35 V
CERAMIC, ;001 MF 500 V VARIABLE, 3-25 PF 500 V CERAMIC, 33 PF NPO VARIABLE, 3-25 PF 500 V CERAMIC, .001 (IF 500 V CERAMIC, ;001 MF 500 V CERAMIC, ..01 MF 500V TANTALUM, 6.8 MF 35 V VARIABLE, 3-25 PF 500 V CERAMIC, .001 MF 500 V VARIABLE, 3-25 PF 500 V CERAMIC, .001 MF 500 V CERAMIC, .01 MF 500V
26
Symbol
Stock No.
C71 C72 C73 C74 C75
C76 THRU
CSI C82 C83 C84 C86 C87 C88 C89 C90 C91 C92 C93 C94 C95 C96 C97 C98 C99 Clop
245171 245167 245171 245167 432444
245171 121291 245167 423664 127396 219215 109316 232927 232927 232927 248253 423735 423736 240846 248253 248253 423736 432444 236617
C81 CR2 CR3 CR4
CR7 C88 CR9 CR10
THRU CR21 CR21 CR24
1C1 1C2 1C3
IC4 THRU
IC9 1C10 1C11 1C12
IC13 1C14
JI J2
LI L3 L4
L5 16 L7 18 L9 110 L11 112 113 114 115 116 117 118 119 L20 121
424857 245173 245173 234552 234552 245173 245173
242220 426189 248254 245174 245175 245175
429606 CA30288 420547 420547 423737 244345 223973 223973 245173 245178 245179 245180 245171 245178 245181 245178 245182 245183 245184 245741 245186 245185 245741 248257 245186 245132
245187
Drawing No.
Description
VARIABLE, 3v,25 PF 500 V CERAMIC, ',001 MF 500 V VARIABLE, 3-25 PF 500 V CERAMIC, .001 MF 500 V CERAMIC, .01 MF 500V
VARIABLE, 3-,25 PF 500 V CERAMIC, 2,2 PF CERAMIC, .001 MF ELECTROLYTIC, IMF 35V CERAMIC, 10 PF NPO CERAMIC, 22 PF NPO CERAMIC, 15 PF NPO CERAMIC, 0,47 MF 3 V CERAMIC, 0,47 MF 3 V CERAMIC, 0,47 MF 3 V CERAMIC, 4,7 PF NPn ELECTROLYTIC, 0.1UF 35V ELECTROLYTIC, 2.2 MF 20 V CERAMIC, -.001MF 1000V TANTALUM, 27 MF 35 V TANTALUM, 27 MF 35 V ELECTROLYTIC, 2.20F 20V CERAMIC, ..01 MF 500V TANTALUM, 22MF 35V 5%
DIODE - TYPE 1N52408 ZENER DIODE, VARICAP - TYPE MV840 DIODE, VARICAP - TYPE MV840 DIODE .! TYPE 1002 DIODE - TYPE 1002 DIODE, VARICAP - TYPE MV840 DIODE, VARICAP - TYPE MV840
DIODE - TYPE 1N4154 DIODE - TYPE 1N4151 DIODE, ZENER e TYPE 1zC30T5 INTEGRATED CIRCUIT - TYPE mC1027P INTEGRATED CIRCUIT - TYPE mC1013P INTEGRATED CIRCUIT - TYPE mCI013P
INTEGRATED CIRCUIT - TYPE MC9802P INTEGRATED CIRCUIT -, TYPE CA30288 INTEGRATED CIRCUIT - TYPE MC890P INTEGRATED CIRCUIT - TYPE mc890P INTEGRATED CIRCUIT - TYPE MC825P INTEGRATED CIRCUIT - TYPE CA3018 CONNECTOR *9 BNC CONNECTOR r BNC CHOKE - 2,7 UH CHOKE - 2.7 UN CHOKE .! 20 H COIL- OSCILLATOR CHOKE - 2;7 UH CHOKE ,. 2,7 UH CHOKE - 0.47 UH CHOKE ' 2.7 UH CHOKE - 0,1 H CHOKE .. 150 UN CHOKE CHOKE CHOKE CHOKE CHOKE CHOKE CHOKE CHOKE .. 2.4 UH CHOKE, 3 TURNS N18 AWG W 1/4 IN DIA CHOKE
27
.Symbol
Stock No.
L22
245187
L23
245187
L24
245182
L25
248256
Q1
247994
Q2
247994
Q3
2N3866
Q4
204440
Q5
245102
Q6
236267
Q7
2N4037S
QS
2N5293
PI
248251
P2
248266
RI R2 R3 R4
R5 R6 R7
R8 R9 RIO RII R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55
426211 426219 108869 219459 108866
108864 108871 232389 223709
218499 426232 426213
108865 426233 230605 226975 230605 426232 426213 108865 502047 108865 227755 134744 108866 108866 108861
218758 108866 108805 108866 502010 108861 108865 108865 426213 223769 108865 426213 223769 108866
218499 218499 218499 108866 426112 426112 223769 108869 218499 218499 108869
218499
Drawing No.
Description
99206-08U 99206-080 99206-076 99206.056 99206-066
99206-058 99206-082 99206-094 99206.086
99206-074 99206-038 99206-070 99206-062 99206-042 99206-043 99206-045 99206-043 99206-038 99206-070 99206.062 82283.127 99206-062 99206-090
99206.066 99206.066 99206-050 99206-054 99206-066 99206-062 99206-066 82283.111 99206.050 99206-062 99206.062 99206.070 99206-086 99206.062
99206.070 99206.086 99206.066 99206-074 99206-074
99206-074 99206-066 99206.078 99206.078 99206-086 99206.076 99206-074 99206.074 99206-076 99206-074
CHOKE CHOKE CHOKE - 0.1 H
CHOKE - I MH TRANSISTOR - TYPE 2N4427 TRANSISTOR - TYPE 2N4427 TRANSISTOR - TYPE 2N3866 TRANSISTOR - TYPE 2N4440 TRANSISTOR - TYPE 2N5102 TRANSISTOR - TYPE 2N3640 TRANSISTOR - TYPE 2N4037 TRANSISTOR - TYPE 2N5293 CONNECTOR . BNC
CONNECTOR
RESISTORS FIXED COMP UNLESS NOTED
33K OHMS 10% 1/4W 33K OHMS 10% 1/4W
15K OHMS 10% 1/4W 330 OHMS 10% 1/4 W 2200 OHMS 10% 1/4W 470 OHMS 10% 1/4W 47,000 OHMS 10% 1/4 W 470,000 OHMS 10% 1/4 'iN 100,000 OHMS 10% 1/4 W 10,000 OHMS 10% 1/4 W 10 OHMS 10% 1/4W 4700 OHMS 10% 1/4W 1000 OHMS 10% 1/4 W 22 OHMS 10% 1/4W 27 OHMS 10% 1/4 W 39 OHMS 10% 1/4 W 27 OHMS 10% 1/4 W 10 OHMS 10% 1/4W 4700 OHMS 10% 1/4W 1000 OHMS 10% 1/4 W 47 OHMS 10% 1/4W 1000 OHMS 10% 1/4 W 220,000 OHMS 10% 1/4 w 33 OHMS 10% 5W WW 2200 OHMS 10% 1/4 W 2200 OHMS 10% 1/4 W 100 OHMS 10% 1/4 W 220 OHMS 10% 1/4 W 2200 OHMS 10% 1/4 W 1000 OHMS 10% 1/4 W 2200 OHMS 10% 1/4 W 10 OHMS 10% 1/4W 100 OHMS 10% 1/4 W 1000 OHMS 10% 1/4 W 1000 OHMS 10% 1/4 W 4700 OHMS 10% 1/4W 100,000 OHMS 10% 1/4 W 1000 OHMS 10% 1/4 W 4700 OHMS 10% 1/4W 100,000 OHMS 10% 1/4 W 2200 OHMS 10x 1/4 w 10,000 OHMS 10% 1/4 W 10,000 OHMS 10% 1/4 W 10,000 OHMS 10% 1/4 W 2200 OHMS 10% 1/4 W 22,000 OHMS 10% 1/4W 22,000 OHMS 10% 1/4W 100,000 OHMS 10% 1/4 w 15,000 OHMS 10% 1/4 w 10,000 OHMS 10% 1/4 w 10,000 OHMS 10% 1/4 W 15,000 OHMS 10% 1/4 W 10,000 OHMS 10% 1/4 W
28
Symbol
Stock No.
R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R7o R71 R72 R73 R74THRU R77 R78 R79 R80
430178 502222 502222 502247 502027 502039 502027 502010 502047 502310
23793-)
502027 502247 241643 502047 502247 502247 502368
218499 502210
108861 108864
Si
Xici THRU
XIc9 XICI0 Xlcit Xtc12 x1C13 XICI4 XQI X02 X03 x04 X05 X06 X07 xQs
XVI YI
Z1 Z2
Z3
Z4 THRU Z14
245191
423743 423740 423743 423743 423743
422416 422416 248259 248248 248248 422416 422416 248369 423741
245741 245741 245741
245132
MECHANICAL
16
248375
423774
22
248370
23
248377
25
423742
27
229767
41
430892
51
248249
423774
Drawing No.
82283-066 82283-066 82283-070 82283,043 82283-045 82283-043 82283,038 82283-046 82283-074
82283,-043 82283-070 82283-525 82283-046 82283,070 82283-070 82283-084
99206,074 82283,-062 99206-050 99206-058
Description
WIREWUUND, 100 OHMS 10% 5W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 w 4700 OHMS 10% 1/2 W 27 OHMS 10% 1/2 W 39 OHMS 10% 1/2 W 27 OHMS 10% 1/2 W 10 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 w 0,24 OHMS 5% 2 W 27 OHMS 10% 1/2W 4700 OHMS 10% 1/2 W 2.2 OHMS 10% 1/2W 47 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 68,000 OHMS 10% 1/2 W
10K OHMS 10% 1/4W 1.000 OHMS 10% 1/2 w 100 OHMS 10% 1/4w 470 OHMS 10% 1/4w
SWITCH
SOCKET -STRIP OF 7 SOCKET SOCKET -STRIP OF 7 SOCKET -STRIP OF 7 SOCKET -STRIP OF 7 NOT USED SOCKET, 2N4427 SOCKET, 2N4427 SOCKET - TYPE 2N3866 SOCKET - TYPE 2N4440 SOCKET - TYPE 2N5102 SOCKET - TYPE 2N3640 SOCKET - TYPE 2N4037 SOCKET - TYPE 2N5293 SOCKET -CRYSTAL OVEN CRYSTAL - SEE MI -560717 CHOKE - RF CHOKE , RF CHOKE - RF
REACTOR FERRITE READ
COUPLER - SHAFT FINGER STRIP -3 IN. LENGTH
IC PAD, WHITE PAD - INTEGRATED CIRCUIT, WHITE KNOB 1/4 /N DIA Ic14) KNOB 1/8 IN DIA (51) HEAT SINK SHOCK MOUNT - FM SUBCHASSIS
FINGER STRIP
29
Symbol
Stock No.
Drawing No.
B
Description
C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 0311
C312 C313 C314 C315 C316 C317 C318 C320 C321 C322 C325 C326
THRU C329 C330 C413 C414 C415 C416 C4I7 C418 C420 C421 C423 C424
CR301 CR3U2 CR303 CR1u4 CR305 CR306 CR309
THRU
CR320 CR401 CR402 DS301 DS302 DS303 FL301 FL302 F1401
1C301 1C3u2 1C303 1C304 1C3u6 1C404
243352 217378 238220 248378 248379 248379 223777
79191 223777 223777 248379 248380 248387 248374 215198 215198 237797 237797 223777 432444 223777 223777
432444 248265 248387 248374 215198 215199 237797 237797 223777 248265 216971 221678
242220 242220 225312 225312 242220 242220
234552 242220 242220 245152 245153 245154 245158 245159 245158 C430288 420547 244345 CA3015A 244345 CA3015A
BTS-1B STEREO GENERATOR N11-560713 M/L 3720216-501 REV 3
CAPACITORS
VARIABLE, 2.2.34 PF 500 MICA, 15 PF 500 V MICA, 470 PF 500 V FILM, 0.1 MF 10% 100 V FILM .047 MF 10% 100 V FILM, .047 MF 10% 100 V ELECTROLYTIC, 47 MF AT 20 V MICA, 330 PF 500 V ELECTROLYTIC, 47 MFD 20 V ELECTROLYTIC, 47 MFD 20 V FILM, .047 MF 10% 100 V FILM, .0068 MF 10% 100 V FILM, .012 MF 10% 100V FILM, .022 MF 2% 100 V MICA, 33 PF 500 V MICA, 33 PF 500 V ELECTROLYTIC, 15MF 20V ELECTROLYTIC, 15 MF 20 V ELECTROLYTIC, 47 MF 20 V CERAMIC, .01 MF 10% 100V ELECTROLYTIC, 47 MF 20 V ELECTROLYTIC, 47 MF 20 V
CERAMIC, .01 MF 10% 600V VARIABLE, 10-70 PF FILM, .012 MF 10% 100V FILM, .022 MF 2% 100 V MICA, 33 PF 500 V MICA, 33 PF 500 V ELECTROLYTIC, 15 MF 20 V ELECTROLYTIC, 15 MF 20 V ELECTROLYTIC, 47 MF 20 V VARIABLE, 10.70 PF MICA, 22 PF 500 V MICA, 47 PF 500V
DIODE . TYPE 1N4154 DIODE - TYPE 1N4154 DIODE, ZENER r TYPE 1ZC10710 DIODE, ZENER m TYPE 11C10710 DIODE . TYPE 1N4154 DIODE . TYPE 1N4154
DIODE - TYPE LODZ DIODE - TYPE 1N4154 DIODE . TYPE 1N4154 LAMP . LEFT LAMP . STEREO LAMP . RIGHT FILTER - LOW-PASS, 17 KHZ FILTER - LOW-PASS, 55 KHZ FILTER - LOW-PASS, 17 KHZ INTEGRATED CIRCUIT - TYPE CA30288 INTEGRATED CIRCUIT - TYPE MC890P INTEGRATED CIRCUIT - TYPE CA3018 INTEGRATED CIRCUIT . TYPE CA3015 INTEGRATED CIRCUIT . TYPE CA3018 INTEGRATED CIRCUIT - TYPE CA3015
30
Symbol
Stock No.
1C407 K301 K302 L301 L302 P301 0301 Q302 THRU Q306 Q404 Q405 0406
CA3015A
24642')
246421 245155 245182 248266 2114037S
2113053S 2N3053S 2N3053S 2N3053S
8303
R304 R305 R306 R307 R308 R309
R310 R311 R312 R313 R314 R315 R316 R317 R318 R319 R320 R321 R322 R323 R324 R325 R326 R327 R328 R329 8330 R131 R332 R333 R334 R335 R336 R337 R338 R319 R140 R341 R342 R343 R344 R345 R346 8347 R348 R349 R350 R35I R352 R353 R354 R355 R356
502210 502210 502210 502222 502147 502147 502222 502222 502047 502222 502210 502222 502222 502210 502210 502210 502310 502010 502110 431102 502133
502222 502347 522043 522110 502168 243748 502247 502033 423747 502256 234008 562310
502222 502222 502233 502147
502247 431212 431212 502247
502122 502247 502047 502310 502247 423749
50231')
502310 502247 502247 502222 502247 431102
Drawing No.
82283062
82283-062 82283-062 82283-066 82283-058 82283-058 82283,-066 82283-066 82283-046
82283066
82283-062 82283-066 82283-066 82283-062 82283-062 82283,-062 82283-074 92283-038 82283-050
82283-056 82283-066 82283-082 99126-126 99126-050 82283,060
82283,070 82283-044
82283-071
92283-074 82283-066 82283-066 82283-171 82283-058 82283-070
82283-070 82283-054 82283-070 82283-046 82283-074 82283-070
82283-074 82283-074 82283-070 82283-070 82283-066 82283-070
Description
INTEGRATED CIRCUIT - TYPE CA3015 RELAY
RELAY COIL e 10 mH NOM, PILOT PHASE CHOKE - 0'.1 H CONNECTOR TRANSISTOR - TYPE 2N4037
TRANSISTOR - TYPE 2N3053 TRANSISTOR ,. TYPE 2N3053 TRANSISTOR - TYPE 2N3053 TRANSISTOR - TYPE 2N3053
RESISTORS , FIXED COMP UNLESS NOTED
1000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 w 1000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 10 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W VARIABLE: 1000 OHMS 330 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 47,000 OHMS 10% 1/2 W 43 OHMS 5% 2W 100 OHMS 10% 2 W 680 OHMS 10% 1/2 W VARIABLE, 10,000 OHMS 4700 OHMS 10% 1/2 w 33 OHMS 10% 1/2 W VARIABLE, 50 OHMS 5600 OHMS 10% 1/2 W VARIABLE, 2000 OHMS 10,000 OHMS 10% 1/2 w 2200 OHMS 10% 1/2 W 2200 oHMS 10% 1/2 w 3300 OHMS 5% 1/2W 470 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 4990 OHMS 1% 1/2W 4990 OHMS 1% 1/2W 4700 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 w 4700 OHMS 10% 1/2 w VARIABLE, 10,000 OHMS 10,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 w VARIABLE, 1000 OHMS
31
Symbol
R357 R358 R359 R360 8361 R362 R363 R364 R365 R366 R373
R374 R375 R376 R377 R378 R379 8380 R381 8382 R383 R384
R428 R430 R431 R433 R435 8436 R437 R438 R439 R440 R441 R442 R443 R444 R445 R446 R447 R448 R449 R45J R451 R452 R453 R454 R455 R467 R468 R469 R470 R471 R472 R473 R474 R475 R476 R477 R478
S301 5302 S303 7381 T401 XDS3o1 XDS302 XDs303 XK301 XK302 XY301 Y301
Stock No.
423746 502310 245157 502322 502247 502247 502222 502247 502222 423746
502.118
502118 502133 502118 502119 502410 52216» 227777 522168 522168 227777
502110
5021.69
502340 502047 502261 502310 502222 502222 502239 502147 502247
431212 431212 502247 502122 502247 502047 502310 502247 423748 502313 502313 502247 502247 502222 502247 502310 502310 502233 502310 502361 502210 502118
51)2118 502133'
50211» 502118 502110
221694 221694 221694 922355 922355 423750 423750 42375) 423749 423749
248383 248382
Drawing No.
82283074
82283,078 82283-070 82283-070 82283-066 82283-070 82283-066
82283,053 82283-053 82283-056 82283-053 82283,053
'
82283-086 99126-060
99126-060 99126..060
82283-050 82283-060 82283-074 82283-046 82283-072
82203,.074 82283-066 82283-066 82283-173 82283-058 82283,070
82283-070 82283-054 82283-070 82283-046 82283-074 82283,070
82283-074 82283-074 82283,070 82283-070 82283-066 82283-07u 82283,074 82283-074 82283-068 82283-074 82283-084 82283,062 82283-053 82283-053 82283-056 82283-053 82283-053 82283-050
Description
VARIABLE 1000 OHMS 10,000 OHMS 10% 1/2 W 100,000 OHMS 10% 1/2 4 220000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W
4700 OHMS 10% 1/2 w 2200 OHMS 10% 1/2 W VARIABLE, 1000 OHMS 180 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 330 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 100,000 OHMS 10% 1/2 W 680 OHMS 10% 2 W wiREWoUND, 1000 OHMS 10% 5 W 680 OHMS 10% 2 W 680 OHMS 10% 2 W wIREwoUND, 1000 OHMS 10% 5 W
100 OHMS 10%, 1/2 W 080 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 6800 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 3900 OHMS 5% 1/2W 470 OHMS 1U% 1/2 W 4700 OHMS 10% 1/2 W 4990 OHMS 1% 1/2W 4990 UHMS 1% 1/2W 4700 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W VARIABLE, 10,000 OHMS 101000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 100000 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 68,000 OHMS 10% 1/2W 1000 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 330 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 180 OHMS 10% 1/2 W 100 OHMS 10%, 1/2 W
SWITCH ., PUSHBUTTON SWITCH - PUSHBUTTON SWITCH - PUSHBUTTON TRANSFORMER - AUDIO INPUT TRANSFORMER - AUDIO INPUT SOCKET - LAMP SOCKET - LAMP SOCKET - LAMP SOCKET - RELAY
SOCKET -RELAY SOCKET - CRYSTAL CRYSTAL - 76,000 KHZ
32 Symbol
Stock No.
MECHANICAL
24837) 246419 248372
C201 C202 C203 C204 C205 C2o6 C207 C208 C209
CR201 CR202 FL201 P201 Q201 P202
248387 248374
215191 21519R
223777 224287 221678
225312 225312 245159 248266 2N3053S 2N3053S
R201 R2o2 R203 R204 R205 R206 R207 R208 R209
R21.0
R211 R212 R213 R214 R215 R216 R217 R2t8 R2t9 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R23o R231 R232
5201 T201
502112 502112 502156 502112 502112 562168 502310
502261 502047
50231!)
502222 502222 502233 502247 502147 502247
502247 502047 502015 5u2247 426240 502319 502310 502247 502310 502369 502210 522122 522122 502210
430897 922355
Drawing No.
Description
PAO - INTEGRATED CIRCUIT, WHITE RELAY - RETAINER
INSULATOR - TRANSISTOR
82283-051 82283-051 82283-059 82283-051 82283-051 82283-060 82283-074
82283-072 82283-046 82283-074 82283-066 82283-066 82283-068 82283-070 82283-058 82283-070
82283-07o 82283-046 82283-040 82283-070
82283-074 82283-074 82283-070 82283-074 82283-084 82283-062 99126-054 99126-054 82283-062
MONAURAL INPUT ADAPTER MI -560716 P/L 3720215-501 REV 2
CAPACITORS
FILM, $012 MF 2% 100 V FILM, .022 MF 2% 100.V MOT USED CERAMIC, 330 PF 5% 500 V CERAMIC, 330 PF 5% 500 V NUT USED ELECTROLYTIC, 47 MF 20 V CERAMIC, 270 PF 5% 500 V CERAMIC, 470 PF 5% 500 V
DIODE, ZENER - TYPE 12C10710 DIODE, ZENER - TYPE 1ZCIOTIO FILTER - LOW PASS, 17 KHZ CONNECTOR TRANSISTOR , TYPE 2N3053 TRANSISTOR ,p TYPE 2N3053
RESISTORS , FIXED COMP UNLESS NOTED
120 OHMS 10%.1/2 W 120 OHMS 10% 1/2 W 560 OHMS 10% 1/2 W 120 OHMS 10% 1/2 w 120 OHMS 10% 1/2 W 680 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 w JOT USED 6800 L; HMS 10% 1/2 W 47 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 HMS 10% 1/2 w 2200 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 N 470 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 14DT USED 4700 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 15 OHMS 10% 1/2W 4700 OHMS 10% 1/2 W VARIABLE, 10,000 OHMS 10,000 OHMS 10% 1/2 W 100000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 68,000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 22u OHMS10% 2 W 220 OHMS 10% 2 W 1000 OHMS 10% 1/2 W
SWITCH - TOGGLE SPOT TRANSFORMER - AUDIO
33
Symbol
Stock No.
1C201 1C202
x42,)1
X022.
243341 243343
422415 422416
MECHANICAL
24837'1
248372
Drawing No.
Description
INTEGRATED CIRCUIT - TYPE CA3015 INTEGRATED CIRCUIT - TYPE CA3015 SOCKET, TRAN5I5T,1R SOCKET, TRANSISTHR
PA!) - INTECRATrn CIRCUIT, 1TF INSULATOR - TRANSIST(Jk
BTX-1B SCA GENERATOR MI -560714 SERIAL No. 1 through 999
P/L 3720213-501 REV 4
C501 0502 C503 C504 C505 C506 C507A
C5079 C508A
C5088 C509 C510 C511 C512 C513 C514A C514B C5I5A C5158 C516A C516B
C516C C5174 C5178 C518A
C5189 C519 C520 C521 C522 C523 C524 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C535
223777 245142 223777
221.678
248385 238220 228121
426865 228121
426865 432444 236781 248379 432444 245142 238220 218971 426711 426227 426711 228121
228121 248286 228121 228121
426865 248378 245142 248378 248378 248379
237797 236781 248386 248378 223777 236781 248386 236781 223777 223777 237797
CAPACITORS
ELECTROLYTIC, 47 MF 10% 20 V CERAMIC, '.005 MF 10% 500 V ELECTROLYTIC, 47 MF 10% 20 V MICA, 47PF 10% 500V FILM, 0.47 MF 5% 100 V CERAMIC, 470 PF 500 V CERAMIC, 820 PF 500V USED ON 41 KHZ
AND 67 KHZ CERAMIC, 560 PF 500V USED ON 41 KHZ CERAMIC, 820 PF 500V USED MN 41 KHZ
AND 67 KHZ CERAMIC, 560 PF 500V USED ON 41 KHZ CERAMIC, .01 MF 20% 500V ELECTROLYTIC, 2.2 MF 10% 35 V FILM, 0.1 MF 10% 100 V CERAMIC, .01 MF 20% 500V CERAMIC, .005 MF 10% 500 V CERAMIC, 470 PF 500 V, USED ON 67 K CERAMIC, 750 PF 500 V, USED MN 41 K MICA, 120 PF 500V USED ON 67KHZ MICA, 150 PF 500V USED ON 41KHZ MICA, 120 PF 500V USED ON 67KHZ CERAMIC, 820 PF 500V USED ON 41 KHZ
67 KHZ CERAMIC, 820 PF 500V USED UN 41 KHZ MICA, 430 PF 500 V, USED ON 67 KHZ CERAMIC, 820 PF 500V USED ON 41 KHZ CERAMIC, 820 PF 500V USED ON 41 KHZ
67 KHZ CERAMIC, 560 PF 500V USED ON 41 KHZ FILM, 0.1 MF 10% 100 V CERAMIC, .005 MF 10% 500 V FILM, 0.1 MF 10% 100 0 FILM, 0.1 MF 10% 100 V FILM, .047 MF 10% 100 V NOT USED ELECTROLYTIC, 15 MF 1o% 20 V ELECTROLYTIC, 2.2 MF 10% 35 V FILM, .022 MF 10% 100 V
FILM, 0.1 MF 10% 100 v ELECTROLYTIC, 47 MF 10% 20 V ELECTROLYTIC, 2.2 MF 10% 35 V
FILM, .022 MF 10% 100 V ELECTROLYTIC, 2.2 MF 10% 35 V ELECTROLYTIC, 47 MF lo% 20 V ELECTROLYTIC, 47 MF 10% 20 V ELECTROLYTIC, 15 MF 10% 20 V
34
Symbol
Stock No.
CR501 THRL
CR509
242220
CR510
225312
CRS11 DS501 D5502
218612 245144 245145
10501 THRL
10505
244345
L501
245146
L502 P501
245147 248266
0501
2N3053S
Q502
2N3053S
R501 R502 R503 R504 R505 R506 R507 R508 R509 R510 R511 8512 R513 R514 R515 8516 R517 R518 R519 R520 8521 R522 8523
R524
R525 R526
R527 R528 R529 R530 R531 R532 R533 R534
R535 R536 R537 R53s R539 R540 R541 8542
R543 R544 8545 8546 R547 R548 R549 R550 R551 R552 R553 R554
502122 502122 502122 502147
502122 426023 502310 502322 502110 502222 502147 502322 502322 502322 426023 502310 234008 502115 502210 502315 502222 502222 502222 502247
502268 502268
502222 502247 502210 502210 502110 502347 502310 502247 502347 502310 502412
502322 502233 502127 502247
502310 502122 502322 502210
232646 502322 502322 502122
502222 502322 502347 502233 502110
Drawing No.
82283-054 82283.054 82283.054 82283-058 82283.054
82283.074 82283.078 82283-050 82283-066 82283,058 82283.078 82283-078 82283-078
82283,074
82283-052 82283-062 82283.076 82283-066 82283.066 82283.066 82283.070 82283-072 82283.072 82283,066 82283.070 82283.062 82283.062 82283.050 82283.082 82283.074 82283-070 82283.082 82283.074 82283.087 82283.078 82283.068 82283-055 82283.070 82283.074 82283-054 82283-078 82283-062
82283.078 82283-078 82283.054 82283-066 82283.078 82283-082 82283-068 82283.050
Description
DIODE - TYPE 1N4154 DIODE - ZENER . TYPE 14C10710 DIODE . TYPE 1N2069
LAMP 6 PILOT, GREEN LAMP 6 PILOT, RED
INTEGRATED CIRCUIT TYPE CA3018 INDUCTOR INDUCTOR CONNECTOR TRANSISTOR , TYPE 2N3o53 TRANSISTOR- TYPE 2N3053
RESISTORS FIXED COMP UNLESS NOTED
220 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W VARIABLE, 1000 OHMS 10,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W VARIABLE, 1000 OHMS 10,000 OHMS 10% 1/2 W VARIABLE, 2000 OHMS 150 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 15,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 6800 OHMS 10% 1/2 W 6800 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 47,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 w 4700 OHMS 10% 1/2 W 47,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 120,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 270 OHMS 10% 1/2W 4700 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W VARIABLE, 5000 OHMS 220000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 w 220 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 47,000 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W
35
Symbol
R555 R556 R557 R558 R559 R560 R561
R562 R563 R564 R565 R566 R567 R568 R569 R570 R571 R572 R573 R574 R575 R576 R577 R578 R579 R580 R581 R582 R583 R584 R585 R586 R587
Stock No.
502233 502122 502247 232646 502410 502422 502222
502247 502368 502310 502222 502110 502322 502347 502247 502147 502122 502310 502222 502222 502110 502310 502310 502222 502222 502222 502310 502310 502127 502127 502047 502110 245157
5501 1501 XDS501 XDS502
430897 245149 248262 248262
MECHANICAL
248370 248377
Drawing No.
82283.068 82283-054 82283.070
82283.086 82283-090 82283.066
82283.070 82283.084 82283-074 82283-066 82283.050 82283-078 82283-082 82283-070 82283.058 82283.054 82283-074 82283.066 82283.066 82283.050 82283.074 82283-074 82283.066 82283.066 82283.066 82283.074 82283.074 82283-055 82283.055 82283-046 99126.050
Description
3300 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W VARIABLE, 5000 OHMS 100,000 OHMS 10% 1/2 W 220,000 OHMS 10% 1/2W 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2W 68,000 OHMS 10% 1/2 w 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 47,00) OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 w 2200 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 w 270 OHMS 10% 1/2 W 270 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 100 OHMS 10% 2 W VARIABLE, 100,000 OHMS
SWITCH - TOGGLE TRANSFORMER SOCKET - LAMP SOCKET - LAMP
MISCELLANEOUS
PAD . INTEGRATED CIRCUIT, WHITE PAD . TRANSISTOR
BTX-1B SCA GENERATOR MI -560714 SERIAL No. 1000 and up
P/L 3720213.502 REV 4
C501 0502 C503 C504 C505 C506 C5074
C5078 C507C C508A C5083 C508C C509 C510 0511 C512 C513 C514A C514B
223777 245142 223777 221678 249954 249954 426865 215198
228121 426865 215198 228121 432444 236781 248378 423731 245142
238220 218971
CAPACITORS
ELECTROLYTIC, 47 MF 10% 20 V CERAMIC, .005 MF 10% 500 V ELECTROLYTIC, 47 MF 10% 20 V MICA, 47PF 10% 500V TANTALUM, 22UF 20V TANTALUM, 22OF 20V CERAMIC, 560 PF 500V USED ON 67 KHZ CERAMIC, 330PF 500V USED ON 41 KHZ CERAMIC, 820 PF 500V USED ON 41 KHZ CERAMIC, 560 PF 500V USED ON 67 KHZ CERAMIC, 330PF 500V USED UN 41 KHZ CERAMIC, 820 PP 500V USED ON 41 KHZ CERAMIC, '.01 MF 20% 500V ELECTROLYTIC, 2.2 MF 10% 35 V FILM, 0.1 MF 10% 100 V FILM, .01UF 10% 100V CERAMIC, .003 MF 10% 500 V CERAMIC, 470PF 10% 500V -USED ON 67K CERAMIC, 750PF 10% 500V.US/0 ON 41K
36
Spngol
Stock No.
C515A C5158 C516A 05168 C516C C516D
C5174 C5178 C518A 05188 C518C C519 C520
C521 C522 C523 C524 C525 C526 C527 C528 C529 C530 C531 C532 C533 C534 C515 0536 C537
426711 426227 228121 426711 228121 228121
248286 228121 228121 426865 228121 248378 245142 248378 248378 248379
237797 236781 248386 248378 223777 236781 248386 236781 223777 223777 237797 227444 240846
CR505 THRU
CR509
242220
CR510
225312
CR511
218612
D%501
245144
DS502
245145
10501 THRU
IC505
244345
1.501
245146
L502
245147
P501
248266
Q501
2N3U535
Q502
2N3053S
R501 R502 R503 R504 R505 R506 R507 R508 R509 R510 R511 R512 R513 R514 R515 R516 R517 R518 8519
R520 R521 R522 R525
502122 502122 502122 502147 502122 426023 502310 502322 502133 502222 502139 502327 502222
502247 426023 502247 234008 502315
502215 423732 502310 502247
502239
Drawing No.
82283.054 82283.054 82283-054 82283.058 82283.054 82283.074 82283.078 82283.056 82283-066 82283.057 82283.079 82283.066 82283.070 82283.070 82283.076 82283.064 52283m074 82283.070 8228300611
Description
CERAMIC, 120 PF 500V USED ON 67 KHZ CERAMIC, 150 PF 500V USED ON 41 KHZ CERAMIC, 820 PF 500V USED ON 67 KHZ CERAMIC, 120PF 500V USED ON 67 KHZ CERAMIC, 820 PF 500V USED ON 41 KHZ CERAMIC, 820 PP 500V USED ON 41 KHZ CERAMIC, 430PF 10% 500V.USED ON 67K CERAMIC, 820 PF 500V USED ON 41 KHZ CERAMIC, 820 PF 500V USED ON 67 KHZ CERAMIC, 560 PF 500V USED ON 41 KHZ CERAMIC, 820 PF 500V USED ON 41 KHZ FILM, 0.1 MF 10% 100 V CERAMIC, .005 MF 10% 500 V FILM, 0,1 MF 10% 100 V FILM; 0.1 MF 10% 100 V FILM, 4047 MF 10% 100 V NOT USED ELECTROLYTIC, 15 MF 10% 20 V ELECTROLYTIC, 2.2 MF 10% 35 V FILM, .022 MF 10% 100 V FILM, 0.1 MF 10% 100 V ELECTROLYTIC, 47 MF 10% 20 V ELECTROLYTIC, 2.2 MF 10% 35 V FILM, .022 MF 10% 100 V ELECTROLYTIC, 2.2 MF 10% 35 V ELECTROLYTIC, 47 MF 10% 20 V ELECTROLYTIC, 47 MF 10% 20 V ELECTROLYTIC, 15 MF 10% 20 V CERAMIC, .1UF 25V CERAMIC, '.001UF 1000V
DIODE , TYPE 1N4154 DIODE - ZENER . TYPE 1ZC10710 DIODE TYPE 1N2069 LAMP m PILOT, GREEN LAMP a PILOT, RED
INTEGRATED CIRCUIT - TYPE CA3018 INDUCTOR INDUCTOR CONNECTOR TRANSISTOR TYPE 2N3053 TRANSISTOR . TYPE 2N3053
RESISTORS FIXED COMP UNLESS NOTED
220 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W VARIABLE, 1000 OHMS 10,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 330 OHMS 10% 1/2W 2200 OHMS 10% 1/2 W 390 OHMS 10% 1/2W 27K OHMS 10% 1/2W 2200 OHMS 10% 1/2W 4700 OHMS 10% 1/2W VARIABLE, 1000 OHMS 4700 OHMS 10% 1/2W VARIABLE, 2000 OHMS 15K OHMS 10% 1/2W 1500 OHMS 10% 1/2W THERMISTOR, 5K OHMS 10K OHMS 10% 1/2W 4700 OHMS 10% 1/2W 3900 OHMS 10% 1/2W
37
Symbol
R526 R529 R530 R531
R532 R533 R534 R535 R536 R537 R538 R539 R540 R541 R542 R543 R544 R545 R546 R547 R548 R549 R550 R551 R552 R553 R554 R555 R556 R557 R558 R559 R560 R561 R562 R563 R564 R565 R566 R567 R568 R569 R570 R571 R572 R573 R574 R575 R576 R577 R578 R579 R580 R581 8582 R583 8584 R585 R586 R587
5501 T501 XDS501 XD5502
Stock No.
502239 502222 502222
502110 502347 502310 502247 502347 502310 502412 502322 502233 502122 502247 502310 502122 502322 502210 232646 502322 502322 502122 502222 502322 502347 502233 502110 502233 502122 502247 232646 502410 502422 502222 502410 502368 502310 502222 502110 502322
502347 502247 502147 502122 502310 502222 502222 502110 502310 502310 502222 502222 502222 502247 502247 502127 502127 502047 502068 245157
430897 245149 423750 423750
MECHANICAL
248370 248377 423733
Drawing No.
82283.069 82283.066 82283.066 82283.050
82283.082 82283.074 82283.070 82283.082 82283.074 82283.087 82283.078 82283.068
82283.054 82283.070 82283.074 82283.054 82283.076 82283.062
82283.078 82283.078 82283.054 82283.066 82283.078 82283.082 82283.068 82283.050 82283.068 82283.054 82283.070
82283.086 82283.090 82283.066 82283.086 82283.084 82283.074 82283.066 82283.050 82283-078 82283-082 82283.070 82283.058 82283.054 82283-074 82283.066 82283.066 82283.050 82283.074 82283-074 82283.066 82283.066 82283.066 82283.070 82283.070 82283.055 82283.055 82283.046 82283-048
Description
3900 OHMS 10% 1/2W 2200 OHMS 10% 1/2W 2200 OHMS 10% 1/2W 100 OHMS 10% 1/2 W
47,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 47;000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 120,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 w 10,000 OHMS 10% 1/2 W -220 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W VARIABLE 5000 OHMS 22,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 47,000 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 3300 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W VARIABLE, 5000 OHMS 100,000 OHMS 10% 1/2 W 220,000 OHMS 10% 1/2W 2200 OHMS 10% 1/2 W 100,000 OHMS 10% 1/2 W 68,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 47,000 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 w 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2W 4700 OHMS 10% 1/2W 270 OHMS 10% 1/2 W 270 OHMS 10% 1/2 W 47 OHMS 10% 1/2 W 68 OHMS 10% 1/2W VARIABLE, 100,000 OHMS
SWITCH - TOGGLE TRANSFORMER SOCKET -LAMP SOCKET.LAMP
PAD - INTEGRATED CIRCUIT, WHITE PAD TRANSISTOR FILTER -LOW PASS
38 Symbol
Stock No.
Drawing No.
Description
C101 THRU
C104
436896
C105
432444
C106 C107 C108 C109
432444 432444 223102 427443
CI10
THRU
C/13
434244
C115
THRU C117 0118 C119
434244 236781 236781
C120
221673
C121
237797
C122 C123
237797 237797
C124
237802
C125
223777
C126 THRU
C130
427443
CB101 CRI01 CR102
THRU
CR105 CR106 CR107
CR108 THRU
CR111
CR112 CR113 CR114 CR115 CR116 CR117 DS101 F101
1C101 J101 J102
J103 J104
J105 J106 J107 J108 J109
J110 J111 J112 J113 K101 K102
248261 248260
245126 430999 245128
234552 245128 234552 234552 425621 242220 419628 248263 243680 244345 245135 221181
54472 245138 245138 245133 245133 223973 211510 211510 223973 211510 211510 240537 225358
BTE-15A MAIN FRAME MI -560710 P/L 3720208-501 REV 3
CAPACITORS
2600 UP 50V ELECT (WITH CLAMP) CERAMIC, .01 MF 20% 600V CERAMIC, ..01 MF 20% 600V CERAMIC, .01 MF 20% 600V FILTER/ Ool MF 75 V FILTER, 250 MF 50V
CERAMIC, .01 MF 20% 600V
CERAMIC, .01 MF 20% 600V TANTALUM, 2.2 MF 10% 35 V TANTALUM, 2,2 MF 10% 35 V MICA, 47 PF 5% 500 V TANTALUM, 15 MF 10% 20 V TANTALUM, 15 MF 10% 20 V TANTALUM, 15 MF 10% 20 V TANTALUM, 6.8 MF 10% 35 V TANTALUM, 47 MF 10% 20 V
FILTER, 250 MF 50V
CIRCUIT BREAKER - 2 AMP, 240 V DIODE, ZENER r TYPE 1N1361
DIODE . TYPE 1N1344A DIODE, ZENER . TYPE 1ZSIOA, 1N4704A DIODE, ZENER . TYPE 11C16TI0
DIODE n TYPE 1002 DIODE, ZENER r TYPE 11C16TIO DIODE TYPE 1002 DIODE . TYPE 10D2 DIODE, ZENER r TYPE IZC4.3T10 DIODE . TYPE 1N4154 DIODE - TYPE 1N4751A ZENER PILOT LAMP FUSE, AGC 2.5A 250V INTEGRATED CIRCUIT . TYPE CA3018 CONNECTOR , 8 TERMINAL CONNECTOR r 12 TERMINAL CONNECTOR . POWER, MALE BASE CONNECTOR . SCA NO. 1 CONNECTOR . SCA NO. 2 CONNECTOR n STEREO CONNECTOR FM EXCITER CONNECTOR BNC, WIDE BAND CONNECTOR . LEFT IN CONNECTOR . RIGHT IN CONNECTOR BNC, TELEMETRY CONNECTOR ' SCA, 2 IN CONNECTOR . SCA, 1 IN RELAY . REMOTE POWER, 220 VAC RELAY - AFC, UNLOCK 24 V UC
39
Symbol
Stock No.
Drawing No.
Description
L101 L102 M101 M102
01.01
Q102 Q103 Q104
Q105 Q106 Q107 Q108 0109
245132 245132 245133 245134 232359 2N5293 2N5293 241250 2N5293 2N3053S 2N3053S 236285 2N3053S
R101 R102 R103 R104 R105 8/06 R107 R108 R109 R110 R111
R112 R113 R114 R115 R116 R117 R118 R119 R120 R121
R122 R123 R124 R125 R126 R127 R128 R129 R130 THRU R136 R137
215840 502510 502147 502215 502218 502310 426240 502315 502122 502147 522147 502427 502322 502310 502210 502356 502310 502222 502147 502110 502122 502222 502247 502247 502010 502310 502215 502333 431112
426240 502210
S101 S102 S103 T101 XDS101 X0101 )0102
THRU XQ1U5
245139 245140 225745 245141 423750 248368
248369
MECHANICAL
248372 50367 48894
248370 423745
9915
82203.098 02203.058 82283.064 82283.065 82283.074
82283.076 82201.054 02203.058 99126.058 82283.091 82283.078 82283.074 82283.062 82283.083 82283.074 82283.066 82283.058 82283.050 82283.054 02203.066 82283,070 82283.070 82283.038 82283.074 82283.064 82283.080
82283.062
CHOKE . R8, 2,4 OH CHOKE . RP, 2,4 OH METER r 0.50 UA METER AUDIO, 0-200 UA TRANSISTOR - TYPE 2N3055 TRANSISTOR - TYPE 2N5293 TRANSISTOR - TYPE 2N5293 TRANSISTOR TYPE 2N3740 TRANSISTOR r TYPE 2N5293 TRANSISTOR . TYPE 2N3053 TRANSISTOR - TYPE 2N3053 TRANSISTOR - TYPE 2N3565 TRANSISTOR , TYPE 2N3053
RESISTORS FIXED COMP UNLESS NOTED
VARIABLE, 12 OHMS 50 W 1 MEGDHM 10% 1/2 W 470 OHMS 10% 1/2W 1500 OHMS 10% 1/2 W 1800 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W VARIABLE, 10,000 OHMS 15,000 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 470 OHMS 10% 2 W 270,000 OHMS 10% 1/2 W 22,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 1000 OHMS 10% 1/2 W 56,000 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 470 OHMS 10% 1/2 W 100 OHMS 10% 1/2 W 220 OHMS 10% 1/2 W 2200 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 4700 OHMS 10% 1/2 W 10 OHMS 10% 1/2 W 10,000 OHMS 10% 1/2 W 1500 OHMS 10% 1/2 W 33,000 OHMS 10% 1/2 W VARIABLE, 200 OHMS
VARIABLE, 10,000 OHMS 1000 OHMS 10% 1/2W
SWITCH - ROTARY SWITCH 'me ROTARY SWITCH - SPST TRANSFORMER e, POWER LAMP SOCKET MOUNTING KIT.TRANSISTOR
MOUNTING KIT.TRANSISTOR
INSULATOR I, TRANSISTOR SOCKET OCTAL FUSE POST HOLDER PAD INTEGRATED CIRCUIT, WHITE KNOB -METAL SKIRTED
SOCKET
40 Symbol
Stock No.
Drawing No.
Description
SET OF CONNECTOR PLUGS MI -560734
1
921359
1510013-101
0G-88C/U (CONNECTS J2,J108 E J111)
2
211509
481799-001
AUDIO (CONNECTS J109,J110,J112LJ113
3
32661
878243-001
2 CONDUCTOR (EXCITER POWER,CONNECTS
TO J103)
4
55808
727969-008
B TERMINAL FEMALE (CONNECTS TO J101
5 6
54254 101966
727969-018 3722886-007
12 TERMINAL FEMALE CONNECTS TO J102 DUMMY PLUG (SUBSTITUTE FOR EXCITER
REMOTE POWER RELAY K101)
424269 243867
8544669-001
CONNECTOR, COAXIAL (ADAPTER RNC-N) 1500 [HM 1% 1/2W CTIP
426159
8528981-001
DIRECTIONAL COUPLER
MODULE EXTENDER MI -560719
3456737-
MUDDLE EXTENDER
1
5
248266
6
245138
CONNECTOR CONNECTOR
1
247994
2
2N3866
3
2N4440
4
2N5102
RECOMMENDED SPARE RF TRANSISTORS MI -560718
TRANSISTOR - TYPE 2N4427 TRANSISTOR - TYPE 2N3866 TRANSISTOR - TYPE 2N4440 TRANSISTOR - TYPE 2N51U2
SUGGESTED EQUIPMENT SPARES
Description
Capacitor, Electrolytic - 0.1 uF 35V Capacitor, Electrolytic - 0.22 uF 35V Capacitor, Electrolytic - 1.0 uF 35V Capacitor, Electrolytic - 2.2 uF 20V Capacitor, Electrolytic - 22 uF 20V Capacitor, Electrolytic - 100 uF 20V Capacitor, Electrolytic - 150 uF 15V Capacitor, Electrolytic - 1500 uF 25V Oven, Crystal - MI -560717A
(Crystal not included) One Each of All Integrated Circuits,
Transistors and Diodes (1N3518, 1N4151, 1N4154, 1ZC30T5, 10D2, MV840, 2N3640, 2N3866, 2N4037, 2N4427, 2N4440, 2N5102, 2N5293, CA3018, CA3028, MC825P, MC890P, MC1013P and MC1027P)
BTE-15A FM EXCITER
Symbol
Quantity
C50, C51
1
C9, C49
1
C38, C84
1
C8, C94, C98
1
C45, C47
1
C31
1
C19
1
C25
1
12
1
MI -560730
1
Stock No.
247837 423739 242034 423736 245163 245168 248251 423734 248376
R0391
41
SUGGESTED EQUIPMENT SPARES (Continued)
Description
Capacitor, Electrolytic - 15 uF 20V Capacitor, Electrolytic - 47 uF 20V
Lamp, Left - 28V, 40 mA Lamp, Stereo - 28V, 40 mA Lamp, Right - 28V, 40 mA Resistor, Variable - 50 ohms Resistor, Variable - 1000 ohms Resistor, Variable - 1000 ohms Resistor, Variable - 2000 ohms Resistor, Variable - 10,000 ohms Resistor, Variable - 100,000 ohms
10% 1/2 W Crystal - 76.000 kHz One Each of All Integrated Circuits
Transistors and Diodes (1N4154, 1ZC10T10, 10D2, 2N3053, 2N4037, CA3015, CA3018, CA3028 and
MC890P)
Capacitor, Electrolytic - 47 uF, 20V Resistor, Variable, 10,000 ohms One Each of All Integrated Circuits,
Transistors and Diodes (1ZC1OT10, 2N3053 and CA3015)
Capacitor, Electrolytic - 1600 uF, 50V
Lamp, Pilot Fuse - AGC 2.5A 250V Resistor, Variable - 12 ohms, 50 W Resistor, Variable - 200 ohms Resistor, Variable - 10,000 ohms
One Each of All Integrated Circuits, Transistors and Diodes (1N1344A, 1N1361, 1N4154, 1ZC4.3T10, 1ZC16T10, IZSPDA., 10D2, 2N3053, 2N3055, 2N3565, 2N3740, 2N5293 and
CA3018)
..
Capacitor, Electrolytic - 2.2 uF 35V
Capacitor, Electrolytic - 15 uF 20V Capacitor, Electrolytic 47 uF 20V
Lamp, Pilot - Green Lamp, Pilot - Red Resistor, Variable - 1000 ohms Resistor, Variable - 2500 ohms Resistor, Variable - 10,000 ohms Resistor, Variable - 5,000 ohms Resistor, Variable - 100,000 ohms One Each of Integrated Circuits
Transistors and Diodes (1N2069, 1N4154, 1ZC1OT10, 2N3053 and
CA3018)
BTS-1B STEREO GENERATOR
Symbol
Quantity
C318, C418, C419 1
C307, C309, C310, 1
C320, C322, C325,
C420
DS301
3
DS302
3
DS303
3
R332
1
R322, R356
1
R357, R366
1
R334
1
R329, R349, R449 1
R359
1
Y301
1
MI -560731
1
MONAURAL INPUT ADAPTER
C207
1
R223
1
MI -560733
1
BTE-15A MAIN FRAME
C101, C102, C103, 1
C104
DS101
3
F101
5
R101
1
R129
1
R107, R130 thru
1
R136
MI -560729
1
BTX-1B SCA GENERATOR
C510, C526, C530,
1
C532
C525, C535
1
C501, C503, C529,
1
C533, C534
DS501
3
DS502
3
R506, R515
1
*R517
1
**R517
1
R546, R558
1
R587
1
MI -560732
1
*Used on SCA boards serial no. 1000 and up. **Used on SCA boards serial no. 1 through 999.
Stock No.
I
237797 223777
245152 245153 245154 423747 261451 423746 234008 243748 245157
248382 R0392
223777 259322 R0394
423779
248263 243680 215840 258091 259322
R0390
236781
237797 223777
245144 245145 245156 248264 259322 232646 245157 R0393
C301 R322 S301 C39 DS30( S302 SI DS302 DS303 S303 C14 R356
(GREEN)
(YELLOW) (RED)
R359 M101
S101
S102
RE DUE NI,
1/1011Nit
LL
FVOOR LAM..P
,41,1 AMP EXCITER Ong°,3* MULTIMETER
LEFT
EREO
RIG1
STEREO GENERA TOR
SEPARATION
OF F DELAY
OUT
MAO
ONOFF
MOD
FRED
DELAY
OU
SCA OENER, T II Ft
AUDIO MuLTIMETEF
RE 000 UT
RI OWER ADJUST
STE 15A\ FM EXCITER
R506
DS501 S501 (GREEN)
DS502 R506 R515
(RED)
R587 R546
R5I5 R587
R546 DS501 S501 DS502
(GREEN)
(RED)
S103
DS101
(AMBER)
M102
R101
43
Figure 7. BTE-15A System, Module Extender Figure 8. BTE-15A System, Module Extender Installed
45
Figure 10, Main Frame, Rear View
46
0103
Q102
QI01 CB101 SEE FIG. 13 FI01 SEE FIG.12 SIO1
MI01
S102
METERING AMPLIFIER
KI01
BOARD
(SEE FIGURES 14 a 15)
KIO2
QI05
QI04
TIOI
R101
M IO2
Figure 11. Main Frame, Parts Location
47
CB101
Figure 12. Main Frame, Rectifier and Filter CR101
ACMALPSNO2. SM3 VOLTS 240 AC CYCLES 60 CURVE 1
LINE
LOAD.
F101 Figure 13. Main Frame, Fuse Panel
C108
I K040
L
R I 29
(METER ZERO)
TP 106 (LEFT)
TP105 (BLACK GROUND)
TP104
+3.5
TPI 03 -15
TP102 TP101
+15 +22
0107
Q106
R107 (+ 2 2V
ADJ.)
(1111MONO
MORN& flOMMIMMIK. 01110111111.
11111111111IMIM
R136
(LEFT)
R128
RIO 6 CI II CI 12
R108
CRI 13 CR114 CR115
C117
4101110MES1
Cue
1111 4111111101
1=11,
1
Q108 CRIO6
CI 10 C109 RIO 5 R104 CR108 CRIO 9 RIO 3
C114
CR110
CRIII
RI 0.9
C115 CR112 RHO C113
CR107
RI33 (SCA I
MOD)
R131
(SCA 2 MOD)
RI2N\RI21
RI22
TP113 RED
CRII6
C122
RI3 2 (SCA I
INJ)
TPIIO
8I30 TPI09
(SCA I ( SCA 2 ( SCA 2
INJ)
1NJ)
INJ)
P134 (PGM)
TP108 R135 (PGM) (RIGHT)
TP107 (RIGHT)
40111111111111Mall.
C120
IC101
anniintomet ...mai. arrow
R119
RII7
R118
madmom
RI2 6 RI25 R123 RI 2 4 RI27 C123
CI 19
R115
RII4
RII6
Rill
11111111. 111111111,
TPIII
BRN
4111111111011/11
4.111,
.111111111MMIV
1111111111,
01000111111111M
C121 1K039
R113 0109
R1I2
TP113 ORN
C118
Cl 2 5
CI 24
50
+22V
ADJ
TP101
(+22V) TP102 (+I5V) TP103 (-15V) TP104 (+3.5V) TP105
(GND) METER
ZERO TP106 (LEFT)
LEFT
8100
R107
1 0 K
c1 t
w T
1 5 K 1--
Y27 C130 5 0 s0
2N 3053 IZCIOTIO(1N_4C74a0/_C R 106
2N30s.3
C"2 COI ) ,.., 4600I--
R105
RI 2
4 (BLK 3 3K}.
RI 29 2 0 0
)WHT
RI 3 6 I 0,6
C 109
2 5 0 50
cR110
*OA) 002 vR10PO
F
1002 CR 1090
I NW 7 5 I All-C3-4111
0
CRII7 11: I° -11500
R104
17q4R"
10 2
0
470
0
103
0-
0
0
R109
O
-122 0 1-
CRIO7
-
CII3
O
OR IN 4745
0
-{ 470 r"0
O
412C161=C%R 1-12
O
OR 184745
CR113
O
*--C1 10 02 CAi 14
C115
0
4-
0: 4°
O
TB102
BLK
20"M
BLU
O'M
WHT/GRY
BLU
2o"Ei
WHT/ORN 22
WHT/BLU 6
YEL
25
HT/BLK/BRN 22" =t
HT
22"8-
WHT/BLK 22
RED
24"1F0
WHT/RED
GRN
24" 1121
24"
ORN
BLK/RED
24 14
24"
WHT/GRY 26
GRY
BLK /RED
26" 26' F171
BRN
WHT/BRN 26"
TP107 (RIGHT)
1------1WHT
RIGHT -1
TP108 (PGM)
R135
10 K
WHT
PGM -1
-4_ TP109
(SCA2 INJ)
RI34 10K
IWHT
SCA2 1NJ ---1
TPIIO (SCAT 'NJ)
R130 10K
I WHT
SCAI INJ-11
R132 10K
SCA2 MOD
RI 31 10K
SCA1-1
MOD
81 33 OK
OR I N4 7 31
O
CI 17
-
Rlii
RI16
0
2W
0
117
0
R1C19lif
RII6 -I 56K
0
-1 2.2 +
0
RI 14 T.P 0:
4
N
0 0
CA3010
101 2
T
ORED
CR116
.84154
oNN N
ii&-.TC 122
RI 26
BRN
C118 5112 i,1 R113 0121
RI 2 3
01.21
15001R127
O
T.P. ORN
0
283063 0
0 0
0 0
0
0
0
BRN BLK/GRN VI 0
#26 GRY
28" 21
28" 22
28
#22 WHT/ORN 38"
M102(±)
#22 WHT/BLK 38" M102(-)
ANT/V10 32"
TO SIO2
26 BRN 34"
WHT
32" pi
#26 RED 34"
WHT/BRN 31
#26 ORN 34".
WHT/ORN 32
33 #26 VIO 34"
WHT/GRN 32" #26 ORN 34"
# 28 BLU 34"
0
O
0 TO SIO2
WHT/8RY 30"
# 28 YEL 34"
wifrivEL. 50"(-61 B LK /RED 32"r--1
1411
3K020 12082070-0
NOTE: UNLESS OTHERWISE SPECIFIED, RESISTOR VALUES ARE IN OHMS, 1/2 WATT, 10%. CAPACITOR VALUES ARE IN MICRO FARADS.
Figure 16. Main Frame Metering Amplifier Board, Parts Overlay, Top
51
T13102
111 BLK
20"
BLU
20"
WHT/GRY 20"
BLU
20"
WHT/EILU 22"
YEL
28"
25
WHT/BLK/BRN 22" 8
NHT
22"
9
WH /BLK
10
RED
24"
WHT/REO 24
12
GRN
24"
13
TO S102
M102(+) MI02(+)
O
TO
5102 \
BLK/RED 24"
WHT/GRY 26"
it GRY
26"
8 BLK/RED 26"
19
WHT/BRN 26" 28"
BLK /GRN 28"
22
VIO
28"
*26 GRY
41 2 2
#22 HT/BLK 38"
WHT/V10 32
#26 BRN 34" EWHT
*26 RED 34"
EWHT/BRN
#26 ORN 34"
WHT/ORN 32"
*26 VI0 34"
HT/GRN 32
#26 GRN 34" 26 BLU 34"
WHT/GRY 30" 26 YEL 34"
WHT/YEL
41E10(711E0 32"
CR110, 1002 OD 2
C109 230 50
01 0
C129
C130 250 50
II
2613565
CRIO
CI OR 161474
RII0
70
CR113, 1002
I ZC43 RII5
473
RIII, 470, 21,/
RII4 10K
00 RED
8
4154 2200
8121
220'
+22V
ADJ
R106 OK
(BOTH)
TP101
(+22V) TP102 (+I5V) TP103 (-I5V) TP104 (+3.5V)
TP105 (GND) METER ZERO TP106 (LEFT) LEFT
TP107 (RIGHT)
3- RIGHT
TP108 (PGM) PGM TP109 (SCA2 1NJ) SCA2 INJ TPIIO (SCAI INJ) SCAIINJ
SCA2 MOD
SCAI MOD
(2082070-L) 36021 NOTE: UNLESS OTHERWISE SPECIFIED, RESISTOR VALUES ARE IN OHMS, 1/2 WATT, 10%. CAPACITOR VALUES ARE IN
MICROFARADS.
Figure 17. Main Frame Metering Amplifier Board, Parts Overlay, Bottom
P2
RF
AMPLIFIER
PI
MODULATED OSCILLATOR
AND AFC
53
C6
C15
RII R7 R13
Figure 19. Exciter, M.adulated Oscillator Board, Parts Location
54
R19
L7
C22
R22
Figure 20. Exciter, Modulated Oscillator Board, Parts Location
91
C90
L24 CR17 CRI4 CR18 C47 ICIO LIO R55 R35 R32JR51 R30 R29 CR13 R54 C38 CRI9 R49 C42 C49 R25 CRII 1C9 C32
CR18
R44
C84
C46 R3I Q7 C40
R36 CR2I C45 C89
ICH
C41
IC14 R45
Ic12
R38 R4I C43 R48
CR16 R40
U049
CR15 R42 C44 R46 R53 R47 C48 C5I
SEE FIGURES 19,8i 20
C 33
C84
ICI
IC8
C34
102
R39 CR12 1C3 C35
IC7
R27 R26 R28
Q6
1C4 C37
R52
106
R37
IC5
1013 C50
56
R7I L19 Q5 (SOCKET) R66 C69 R68 Q4 (SOCKET) R63 C63 C65 Q3 R65 JI
Figure 22. Exciter, RF Amplifier, Parts Location, Top
57
JI
ZI R64 Q3
C66 LI4 Z2
R 67
LI7
C7I C88 Z3 R69 Q5
C87
C77
C79
CR20 R70
C81
R60 R6I R62
C92
C82
L12
C61
C59 C60 CR23 LI 5
C95
C64 LI 3 CR24 C68 Q4 LI8 C70 C96 LI6 C73 C86 L20 C75 C97 L21 C76
L22
C78
L23
C80
Figure 23. Exciter, RF Amplifier, Parts Location, Bottom
NOTES: I. UNLESS OTHERWISE SPECIFIED
RESISTOR VALUES ARE IN OHMS, I/4W, 10%. CAPACITOR VALUES -WHOLE NO.'S ARE Pf
DECIMALS ARE /..L.f 2. DIODES, UNLESS SPECIFIED:
I DENOTES MV 840 (MOTOROLA)
DENOTES 10 D2
2K027
3. * NOMINAL VALUE TYPE NPO 4. ** NOMINAL VALUE TYPE N750
NOTES I. UNLESS OTHERWISE SPECIFIED
RESISTOR VALUES ARE IN OHMS, I/4W, 10%.
CAPACITOR VALUES -WHOLE NO.'S
Pf
DECIMALS ARE p.f
2. DIODES, UNLESS SPECIFIED.
I
II DENOTES MV 840 (MOTOROLA)
-4- DENOTES 10 D2
2K026
3. * NOMINAL VALUE TYPE NPO 4. ** NOMINAL VALUE TYPE N750
.022µ.f .01824f
2
1
o3
8
45 67
LID Fly 1
m 0TRIO
IK BLK
C89
NOTES: I UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN
OHMS, 1/4 W, 10%.
CAPACITOR VALUES ARE IN MICROFARADS.
2 '"11E: DENOTES I N4154 DIODE
I C9
MC8 9 OP
ICI MCI 027P
TP8 GR Ye,
C8 -awe--
VC 89 OP
0 TPI BRN
14
r()
I C2
MCI 013P
TV PI 070 ,r) 0
1 C 7 MC89 OP
T P 2 RED
14
TP5
GRN
IC 13'
MC 825P
2N3640
2K022
NOTES:
I UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS, 1/4 W, 10 %. CAPACITOR VALUES ARE IN MICROFARADS.
2 -111=1-- DENOTES IN 4154 DIODE
2 KO 2 1
62 Figure 28. Stereo Generator, Overall View
TP3I0
TP3I6 R327 TP315 R345 R320 R32I 1C301 C318 R350 R305 R303
CR304
CR303 TP307
TP306
TP305---11111W-777- " R326 C302
C310
C309
R304
R307 C303 TP301 Q301
C304
R308
8306
Y301 L3 02
ft
1K045
P
0415
R438 TP409 R470 R467 R468 R471 C423 10407 C424
C321
R469
10404
C3I6 R440
R437
R337
-R341
L R336
C416 1C304 C3I51 1R338 R339 0304 R340\ Q404 R450
TP309
TP312
C4I9 R455 R358 R453 R454 R357 R354
R353
10306 R355
IK044
RU
NO
TP3I4 R336 TP4I1 R472 R365 C414 R431 C322 R444 R445 Q406 Q405 R430
R449 TP408
R 428
TP4I0
R433
R435
1
C420
C418
C4I3 R443 R442
R447
R332 R334 R329 R328
R448
R446
C329
R333
R330
N
R335
C320
R349 R331 C314 C313 R343 R342 R347 Q305 R346 'Q306 R348 R344
TP308
I K042
Ire
41
P
a**
1K043
TP3I1
R336 R362 R360 R351 CR305 P361 CR306 CR402
C319 R352
Q302
CR301 R3I1
R309 C305
R45I
TP31Z C307
R3I6
C312
R325
01
R318
R324
C311
0303 R452 TP304 R323
R310 R312 C306 1C302 R314 R313 R315 1C303 CR302 C308 R317
TP302
TP303
R319
K302 CR312 CR315 R377 R381 R375 R376 R374 R373 R473 R474 R476 R475 R477 R378 CR3I1 K301
CR3I0 CR309 CR313 CR3 4 CR316 CR317 R382 CR3I9 CR318
CR320
R380 R383 R379 C325
C328
C326
C327
I K034
68
NOTES I I. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS, I/2W, 10%, CAPACITOR VALUES ARE ,uF 'S. 2.-1=11-,4154 DIODE
Figure 34. Stereo Generator Board, Parts Overlay, Top
69
R307 470 R304
1K
8445 4700
447
10K
NOTES I. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS, 1/2W, 10%, CAPACITOR VALUES ARE juF S. 2.-C111-=4154 DIODE
Figure 35. Stereo Generator Board, Parts Overlay, Bottom
NOTES I. RESISTOR VALUES ARE IN OHMS , 1/2W , 10% 2. DIODES ARE 10D2
0
K301 limminump
S -M E .AY
2K024
K301
SIM
RELAY
R475 330
R477 .180
378 100K.
9V
C325
4 7p. f
R379
68052 2W
CR311
R383
11< 5W
R380
1K 5W
s9oLvoz aavos -v
CR31
R 382 2W
CR 8 CR320
R381
68052 2W
CR310
CR312
13
1
16
NOTES: I. RESISTOR VALUES ARE IN OHMS, 1/2 W, 10%
2. DIODES ARE 10 D2
O
K 3 0 2 RE APY
21(025
S201
2K0I5
NOTES: I. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES
ARE IN OHMS, I/2W, 10%.
S201
21(014
NOTES: I. UNLESS OTHERWISE SPECIFIED RESISTOR VALUES
ARE IN OHMS, I/2W, 10%.
0BLU
TP207
I (2;N TP201
ORO...1/4Z)
-1-1CR202
TP2096":,\
D3501 (GRN)
LOW PASS FILTER
R515 S501 R587 DS502 (RED)
R546
1K035
4.4*1111c4"4.
dre-4
114.4117/14-
4
mp. itud
prft 1,
r
or
Alet4.4!).
le
* -
r,
ir
sip
or?' A
,
CR511
T501
R505 R502 R504 R503 R501
SCA OPTION SELECT BOARD
75
R550 R547
C521 C520 R551 C5I9
R548 R540 R539 R544 Q502 Q501 r3584
R573
R549 R541
TP504 R542
G RN R545
R543 10503
L502
TP503
V I 0
C517 C518
L501 C5I6A C515
C5I4 R574
R575 R 578
C516B C5I3 R576 R577
R582
C533 R583 10505
R581
R569 R572 R568 C534 R570
R 571
Figure 41. SCA Generator Board, Parts Location, Ser. No. 1 through 999
76
R546 DS502 R587 S501
R515 DS501 R506
R536
CR504 R535
R537
1
1
1
CR505 CR506 R534 R579
1
R538
CR507
7
I
I
C532 I R5611 R570
R533
R532 C510
C5Il R530
R529
R53I
R519 R517 R520 C522
TP502 BLUE 1
C 523
R5601
R524 CR502 CR503 C508 10502 R559 R557
I
C530
R527 C529 R562 R565
10504
R566 R523 R522 C526
R564 R563 C53I R556 C527
IIIIt 411=2.1Mi.
Figure 42. SCA Generator Board, Parts Location, Ser. No. 1 through 999
77
R546 DS502 R587 5501 R5I5 DS50I P506
IR536
I I
R537
I CR505 CR506 R534 R579 CR507 C532 I
R538 C512 C535 R580 CR509
R561 R570
0530
R535
R533
R532 C510
C511
R529 TP502
BLU
R53I
R5I9 R5I7 R520
C522
I R518
C528
TP506 R530 10502 C508
GRN
R560 R559
C529 R562 R565
10504
8566 R522
C526
N
R557
R564 R563
C531 R556 C527
1111.111111ME10
11111M1101ONINIP
411111M11110111111111.
41101111111111111MII.
411111111101011112.
1K038
Figure 42a. SCA Generator Board, Parts Location, Ser. No. 1000 and Up
78
41.10 S141111
1111111
/0.00/11I, IMMO.
TP504
GRY
C521 C520 R551 C5I9.
R550 R547
R54 R540 R539 R544 Q502 Q501
C537
R549
R54I
R542
,..
R545
.
'
________..-.----t:':
R543
..
10503-
I:. .t'
.....,
',.
S;-----4, ,
A
L502
TP503
V I
C517 C518
L501 C5164 C515
C514 R574
R575 R578
0516B C513 R576 R577
R584 R573
R582
C533 R583
__-IC 505
R58I R569 R572 R568 C534 R570 R571
41111.1.1
ANION/M
411=11111100 ,=NO/11_//.
01111.111MOO
Am=111111
.11110111MIIM
1K036
Figure 42b. SCA Generator Board, Parts Location, Ser. No. 1000 and Up
79 .11111
TP506
GRN
R525
R526
TP505 BLK
TP507
ORG
R514 C505
R5I3 C506
C509
R 554
R585 C525 R558
T P501 YEL
R5I2
R5I I
0503
CR510
R586
TP508 RED
R516
R553
R 552 10501
R508
C504 R509 C501 C502 R507 R555
R510
Figure 43. SCA Generator Board, Parts Location, Ser. No. 1 through 999
0
C509 C506 R516 R585 C525
R512 R511 C503 CR510
Figure 43a. SCA Generator Board, Parts Location, Ser. No. 1000 and Up
RED 0T1P35°7
BO
TP505
4-
GRN
TP508
TP0506
044-
r -
- K)0
0G RY
ap 0
TP
504
-n
Lc)
O
,0t 00
0 N-
M'
4a.
8 554
100
R 525
2
(1) c-)
6800
k P 526
6 800
3 502
CA
3016
co
O
R 514 22K
4
504
O
(0 508)
R 5 22
2200
R 527
Co
CO 0
O
UD
2200 R2250230
CC
F2 575
100
8
C5 28
C 529
4 7 kt. f
Q 502 2 N
2200
r -
O
-fO
N
R559 100K
P. 560
220K
R 5 5 7
4 700 R 556
22Q
563 68K
R4750602
12
C 5 3 4
-4-
4:1 -7
3053
rM 00
47) 7,1
4)0
0 5 8 6
2 1 00 2W
R564
10K C 531
.0 2 2 /If
0
0
oo)
8563
270
(.0
CO
Of
NOTES:
I UNLESS OTHERWISE SPECIFIED
RESISTOR VALUES ARE IN OHMS, 1/2 W, 10%
CAPACITOR VALUES ARE IN MI CROFA RA DS.
2-E1- DENOTES IN 5154 DIODE
3. *
FREQUENCY DEPENDENT COMPONENT
VALUES.
FREQ.
67KHz
41 KHz
C507 C 508 L501 820 pf 820 pf 4700
Fo. H
820 pf 820 pf 10,000 +58opf +560pf H. H
L502 3900
I.L.H
4700
H.H
C514 470 pf
750 pf
C515 C516 C5I7 C 518
120 pf 820 pf 430 pf 82opf
+120pf
150 pf 82Opf 82o pf 820 pf
+820pf
+560 pf
NOTES:
I. UNLESS OTHERWISE SPECIFIED
RESISTOR VALUES ARE IN OHMS, 1/2 W, 10%
CAPACITOR VALUES ARE IN MICROFARA DS.
2-1-11- DENOTES IN 5154 DIODE
3. *
FREQUENCY DEPENDENT COMPONENT
VALUES
FREQ. C507# C508# L 501 L502
67KHz 560 pf 560pf 4700 3900 µH µH
41KHz 820pf 820pf 10,000 4700
+330pf +330pf _H. H
/LH
# NOMINAL VALUE GIVEN
C514 470 pf
750pf
C515
120pf
150 pf
2K0I9
C5I6 C5I7 C518
820 pf 430 pf 820pf +120pf
820pf 820pf 820 pf
+820pf
+560 pf
NOTES'.
I. UNLESS OTHERWISE SPECIFIED
RESISTOR VALUES ARE IN OHMS, I/2W, IO %
CAPACITOR VALUES ARE IN MICROFARADS.
2-n1- DENOTES IN 4154 DIODE
* 3.
FREQUENCY DEPENDENT COMPONENT
VALUES.
FREQ. C 507 C 508 L501 L 502 C 514
67KHZ 820 pf 820 pf 4700 3900 470 pf
µH µH
41 KHz 820 pf 820 pf 10,000 4700 750 pf
+ 560 pf +560 pf p. H
µ H
C 515 C 516 C517 C518
120 pf 820 pf 430 pf 820 pf +120pf
150 pf 820 pf 820 pf 820 pf
+820 pf
+560 pf
NOTES'.
I. UNLESS OTHERWISE SPECIFIED
RESISTOR VALUES ARE IN OHMS, I/2W, 10 %
CAPACITOR VALUES ARE IN MICROFARADS.
2-111- DENOTES IN415 4 DIODE
* 3
FREQUENCY DEPENDENT COMPONENT
VALUES.
FREQ.
67KHz
41 KHz
C507# C508# L501 L 502
560pf 560pf 4700 3900 µH µH
820 pf 820 pf 10,000 4700
+330pf +330pf p.H
i.e.H
*NOMINAL VALUE SHOWN
C 514
470 pf
750 pf
2K020
C 515 C516 C517 C518
120 pf 820pf 430 pf 820pf +120pf
150 pf 820 pf 820pf 820 pf
+820pf
+560 pf
86
IK144
NOTES: I. USE SOLID LINE WIRING FOR 67 KHz UNITS USE DOTTED LINE WIRING FOR 41 KHz UNITS 2. RESISTOR VALUES ARE IN OHMS
ADD THIS JUMPER TO ENABLE TELEMETERING TONES TO BE
APPLIED TO SUBCARRIER
Figure 46. SCA Option Select Board, Parts Overlay, Top
IK14 5
NOTES:
I. USE SOLID LINE WIRING FOR 67 KHz UNITS USE DOTTED LINE WIRING FOR 41 KHz UNITS
2 RESISTOR VALUES ARE IN OHMS
ADD THIS JUMPER TO ENABLE TELEMETERING TONES TO BE APPLIED TO SUBCARRIER
Figure 47. SCA Option Select Board, Parts Overlay, Bottom
87
NOTES:
I. -F11-- DENOTES 10 D2 DIODE 2. UNLESS OTHERWISE SPECIFIED
CAPACITOR VALUES ARE IN MICROFARADS
Figure 48. BTS-1B Power Supply Board, Parts Overlay
1K047
NOTES:
I. -F-1- DENOTES 10 D2 DIODE
2. UNLESS OTHERWISE SPECIFIED CAPACITOR VALUES ARE IN MICROFARADS
Figure 49. BTX-1B Power Supply Board, Parts Overlay
IK048
88
SEMICONDUCTOR BASE DATA
H.3.32400 --1 DIA.
.105 .095
.205 .195
INSULATION 3 PINS :gg
.300 .245
I .115
.105
1
.095 .440
.420
1
.160 .140
!Iffl
10-32 NF 2A
.453
U.42 THREAD
2
2N4440
2N5102
DETAILS OF OUTLINE IN TNIS
ZONE OPTIONAL 100 miN
009
125
o
3 LEADS 82 MA.
.260 .240
SEATING PLANE
MIS
TERMINAL CONNECTIONS
PIN NO. I EMITTER PIN NO.2 BASE PIN NO.3 COLLECTOR, CASE
70.
9°
3 26.
NOES -A8-
2N4427 2N 3866
3 LEADS 022 016 DIA
ass, Lad No 2 Emitter
Leal No I
4
I
I
400 MIN
u
100 050
100
Collector
090
Leml No 3
070
2N3640
r.AN CAA-.
200
7214-1
OUTSIDE CORNER
RADII .007 MAX.
.260
.240
45"
T
..0102952
3 LEADS :S1Z DIA.
.034
.045
.028
.029
INDEX TAB
2N4037 2N 3053
450 .250
312 PAIN.
0
r TO -3
35 NIA,
- 205, .420 ; $55
T -263
--
11
33,- 3,33
2 MOUNTING HOLES 014.
2N3055
525A 90,
4,Z NS
539 "
.340 .250 .360 MIN.
.500 I TO -66
SEATING PLANE
L,I00 MAX.
TERMINAL CONNECTIONS
118973
PIN NO. I BASE
PIN NO.2 EMITTER
FLANGE COLLECTOR,
.210
CASE
. 190
962 .958
1,40VA.1.141 2 MOUNTING HOLES
:1,5d DIA R. MAX SPINS 014'
2N3054 2N3740
H9
SEMICONDUCTOR BASE DATA
.180 (4.57)
MAX.
(12.70) MIN.
12 LEADS
.019 (.482) DIA .016 \,407,/
.370 (9.39' .335 \03.51.:
DIA.
1..._.245 (6.22) .215 \5.47)
CA3018 CA 3015
.034 ( 863) .028 \.712
.045 (1.14\ .024 \ .61)
111
.185 (470\ .165 0.19/ s
a
.500(12.70) .040(1.02)
MIN.
MAX.
.045 (1.14 ) ,
.029 `.74 al
11
-r .370 (9.40\ _t
.335 k 8.51 /
.034(.864\ .028 \ .711 /
.335 (851 .305 7..75) 016.
L 050 (I.27 015 1.39/
1111
8 LEADS 019 483) DIA. 016 \ 416
_#.
..211900(54.3832)DIA
L. .160 (4.06) 1 .140 \3.56/
CA 3028
14
0.035 TYP RAO MECHANICAL INDEX POINT
I1I
0 025--
TYP
r-1
1.-9
__I
0.030
0.240 0.260
0.062 TYP
0100 TAP
REF
glg
0.023
(i) This dimension is measured at the seating plane.
0.150 MIN
0.290 D-1-0
Ci)
4 insulating standvstts ere provided.
MCI027P MCI013P MC890P MC8I9P
90
INTEGRATED CIRCUIT SCHEMATICS
91
MC790P MC890P DUAL J -K FLIP-FLOPS
[1] (3) 3 [2] (5) 2 [1] (3) 1 [1] (3) 12 [1] (3) 5
13 (10) [3] 14 (10) [3] 9 (10) [3] 8 (10) [3]
CLOCKED INPUT OPERATION (1)
tnC)
tn + i()
S
C
Q.C)
0
0
0
1
00
0
Qn an®
NUMBER IN PARENTHESIS INDICATES LOADING FACTOR FOR mW MRTL. NUMBER IN BRACKETS INDICATES LOADING FACTOR FOR MRTL.
fro, 4 MHZ Po = 182 mW
Two J -K flip-flops in a single package. Each flip-flop has a direct clear input in addition to the clocked inputs.
1. Direct input (Co) must be low. 2. The time period prior to the negative transition of the
clock pulse is denoted to and the time period subsequent to this transition is denoted 3. Q. is the state of the Q output in the time period t..
4. Clock pulse fall time must be < 100 ns.
CD 12
R1
R2
13 R2
Vcc Co
14
114
10
R2
R2
R2
RI
R2
R2
R2
R2
R2
R5
001115
RI
Aiffillhei 116
R1
RI
4o
S
T
C
GND S
TYPICAL RESISTANCE VALUES
R1=450[2R3 = 510 9.
R2 = 640 17 R4 = 225 E2 R5 = 300 El
RI
T
C
-11000,1, ELECTRICAL CHARACTERISTICS
TEST PROCEDURES ARE SHOWN FOR ONE FLIP-FLOP ONLY. THE OTHER FLIP-FLOP IS TESTED IN THE SAME MANNER,
@ Test
Temperature Yin
(
0°C 0. 960
MC890P !. +25°C 0. 910
( +75°C 0.820
+15°C 0. 865
MC790P) +25°C 0.850
( +55°C 0.800
TEST VOLTAGE VALUES (Volts)
Von
VI NT
V011
0. 930 1.80 0.570 0.880 1.80 0.500
0.790 1.80 0.450
0. 865 1. 80 0. 475
0.850 1.80 0.460
0.800 1.80 0.430
Vcc
3. 60 3. 60 3.60 3. 60 3.60 3.60
Characteristic
Input Current
Output Current
Symbol
lin 2Iin lin lin
IA3 1
Pin Under Test
1
2 3 12
MC890P
Test Limits
0°C
+25°C
+15°C
Min
Max Min Max Min Max
- 600 - 1200
600 - 600
600 - 570 1200 - 1140 600 - 570 600 - 570
Unit µ Adc
I
MC790P
Test Limits
+15°C
+25°C
+55°C
Min Max Min Max
500 - 500 1000 500 - 500 500 - 500
Min Max
470
9400
470
13 1. 80 -
14
-
1.80
1.71 - mAdc 1.65 - 1.65 - 1. 56 -
;
-
;-
;;
-
;
-
;
Unit i.t Adc
;1
mAdc
;
TEST VOLTAGE APPLIED TO PINS LISTED BELOW:
Vin
V,.
Vinn
Vet
Vcc
1
13
11
2
3
-
14
1
12
14
-
13
1
12
11
-
14 3,
-
- 12,14 312
-
;
Gnd
2,3, 4, 12
4,12
1,2, 4, 12
1,2,3,4
2,3,4
1, 2, 4
Output Voltage
Vout
13 13**
-
500
13***
13***
14*** -
14.n -
14°C -
400
400 mVdc
-
-
_
400 - 300
320 mVdc -
-
-
-
-
12
-
1,3
1
1, 3
-
3
-
-
-
11 1,2,3,4,14
4,12
3
3
-
1
1,3
i
Saturation Voltage VCE- (sat) 13
- 400
1341
-
1 440 -
;
300
-;
Ground unused input pins. Other pins not listed are left open.
* Clock pulse to pin 2, see Figure 1,
IA10 is symbol for MC790P.
- 350 mVdc
300 - 290
320 mVdc -
-
;
;
;
-
;
-
;
;
* Pin 13 = LOW t Set by a momentary ground prior to the Co Pin 14 = LOW 1 application of the negative -going Clock Pulse.
-
12
12
-
11 1,2,3,4,14
-
i
1,12,23:34,412
92
MC718P MC818P DUAL 3 -INPUT GATES
Two 3 -input positive logic NOR gates in a single package. Each may be used independently, paralleled for increasing the number of inputs (subject to loading rules), or cross -connected to form bistable elements.
TYPICAL RESISTANCE
VALUES
R1 = 1.5 k R2 = 3.6 k
(1) 2 (1) 12 (1) 13
(1) 5 (1) 6 (1) 9
3 (4) 10 (4)
3 = 2 + 12 -I- 13
NUMBER IN PARENTHESIS INDICATES mW MRTL LOADING FACTOR
= 27 ns
Pc = 12 mW (Input High) 6 mW (Inputs Low)
ELECTRICAL CHARACTERISTICS
TEST PROCEDURES ARE SHOWN FOR ONE GATE ONLY. THE OTHER GATE IS TESTED IN THE SAME MANNER.
Characteristic
Input Current
Symbol
lin
Output Current
1A4
Output Voltage
\rout
Saturation Voltage VC...(.sat)
Pin Under Test
2
13 3
3
3 3 3 3
MC818P
Test Limits
0°C
+25°C
+75°C
Min Max
MM Max
MM Max
-
150
- 140
140
-
1
:
1
-
1
570
-
570 -
535
-
400
- 350
300
-
1
:
1
:
1
-
250
- 250
- 250
-
-
1
-
1
:
1
Switching Time too + toff
90
-
Unit p.Adc
1
5Ade mVde
1
mVdc
1
no
TEST VOLTAGE VALUES
MC818P MC718P
@ Test Temperature
0*C ) +25°C ( +75°C
+15°C .1) +25°C ( +55°C
(Volts)
Vi 0.880 0.830
V°, 0.850 0.800
Vow.
1.80 1.80
0.740 0.710 1.80
0.865 0.865 1.80
0. 850 0. 850 1. 80
0.800 0.800 1.80
V.11
0.500 0.460 0.400 0.475 0.460 0.430
V5c
3.60 3.60 3.60 3.60 3. 60 3. 60
MC718P
Test Limits
TEST VOLTAGE
+15°C
+25°C
+55°C
APPLIED TO PINS LISTED BELOW:
Min Max MM Max
MM Max
Unit
Yin
V.
VBOT
Von
Vcc
Gnd
150
:
1
- 150
:
1
-
150 Ode
2
12
-
1
13
12, 13 2, 13 2.12
11
4
1
570
570
570
µAdc 3
- 2,12.13 11
4
400
- 300
-
320 mVdc
-
:
1
:
1
--
1
1
12
-
1
-
23
-
-
11I 2,4,13
2,4,13
t 4,12,13
- 220
- 230
- 320 mVdc
-
:
1
:
1
-
1
1
-
12
11 2,4,13
13
2,4,12
1
2
I 4,12,13
Pulse Pulse
In
Out
no
13
3
-
11 2,4,12
Ground unused input pins. Other pins not listed are left open.
IV
0 500 ns
f = 1.0 MHz t, < 10 ns tr < 10 ns
SWITCHING TIMES TEST CIRCUIT AND WAVEFORMS
1/2 MC817P
TPe, 0
0 TPout
rS
1N3036
OR
EQUIV
4-/
1/4 MC817P
= GROUND ALL UNUSED INPUTS.
+17Poo
L 0.5 V t
0.5 V
MC1013 MC1213
85 -MHz AC -COUPLED J -K FLIP-FLOPS
Designed for use at clock frequencies to 70 MHz minimum (85 MHz typical). Logic performing inputs (J and K) are available, as well as dc SET and RESET inputs.
POSITIVE LOGIC
3 4 5 6 8 9 10
R -S TRUTH TABLE
R
Pin No. 12
0
S Om"
2
13
0
Qn
0
1
1
1
0
0
1
1
N.D.
All J -k Inputs Are Static
JD -RD TRUTH TABLE
5D RD 0n+1
Pin No.
13
0
0
Qn
0
1
0
1
0
1
(Tan
1
1
All OtherJ-K Inputs And The R -S Inputs Are At a "0" Level
11
12
DC Input Loading Factor = 1 DC Output Loading Factor = 25 Power Dissipation = 125 mW typical
'Any 3 or K input, not used for Cp. "CD obtained by connecting one J and one K input together.
CLOCKED J -R TRUTH TABLE
I
k CD
On
Pin No.
13
0
0
0
an
0
0
1
5n
0
1
1
1
The J and K inputs refer to logic levels while the ED input refers to dynamic logic swings. The J and K inputs should be changed to a logical "1" only while the CD input is in a logic "1" state. (ED maximum "1" level = VCC -0.6 V). Clock CD is obtained by tying one J and one K input
together.
1
0
1
0
Qn
1
1
1
All Other J -R Inputs And The R -S Inputs Are At a "0" Level
CIRCUIT SCHEMATIC
1
13 Q
14 Vcc
0
0
(GND) 0
210
210
425
1.6 k
60
875 21.6 k
1.8 k
2 k
500
500
2
00
SET
4
0
0
.71
30 pF
1k
7
0 VEE
1.5 k
1.5 k
30 pF
2 k
5 1k
Resistor values are nominal.
8
9 10 11
0
0
00
"--...........
K
12 0
RESET
94
120 -MHz AC -COUPLED
MC1027
J -K FLIP-FLOP
Designed for use at clock frequencies to 100 MHz minimum (120 MHz typical). Logic performing inputs (J and K) are available, as well as dc SET and RESET inputs.
POSITIVE LOGIC
3 4
13 5 6 8 9 10
R -S TRUTH TABLE
R
S OnT1
Pin No. 12 2
13
0
0
Dn
o
1
1
1
0
0
1
1
N.D.
All J -K Inputs Are Static
JD-KD TRUTH TABLE
5D KD Qn+1
Pin No.
13
0
0 an
0
1
0
1
0
1
ran
1
1
All Other :1-R Inputs
And The R -S Inputs Are At a "0" Level
11
12
DC Input Loading Factor = 2 DC Output Loading Factor = 25 Power Dissipation = 250 mW typical
*Any J or K input, not used for di> obtained by connecting one J and one R input together.
The J and R. inputs refer to logic levels while the CD input refers to dynamic logic swings. The J and K inputs should be changed to a logical "1" only while the eD input is in a logic "1" state. (Cl) maximum "1" level= VCC -0.6 V). Clock CD is obtained by tying one J and one R input together.
CLOCKED J -K TRUTH TABLE
.7
Pin No. 0
0
R
C.D.
an
13
0
0
an
0
1
an
o
1
1
1
1
0
1
0
Dn
1
1
1
All OtherJ-17 Inputs And The R -S Inputs Are At a "0" Level
CIRCUIT SCHEMATIC
ia 1
13 Q
14 Vcc
O
(GND)O
105
105
215
800
30
435 2 800
900
)
23
4
0 ',.0........ 0
0
SET
]
30 pF 500
7 0
VEE
1.0 k
250
250
\1/4/ 30 pF
750
750
1.0 k 500
8
O
Resistor values are nominal.
9 10 11
O
00
K
12 0
RESET
T108
lAIDEBA ND
O
/717
. '7.109
-EFT IN
1 1 (31
la HT 1N
2.
7:2-. 1 1 1
TEL.E11\ETRy
3-112 sc..c. 21N
1
A- " "--) r 71
i
a, 3
4
3 '<:,'..----,"---\%-----). _ _
\
.5/ \4% \./7
\:, ,`')
24
n.
25
/
J106
c/ STEREO
I
k
C---,/\--)\
-/\--\5/-\6/ 4-
Y Y Y " k 20 82, 9 ?2
II
12
<1,4 24
J/
C->
34
95/96
,0 2
SrUOsWTER
-IS
CV 0421,13740
-HE-
cizs
.01
R41il0o
0
-I5V
1
0I 16
. 02
111---11111- -0-14-40
-^
C 1 15
.01
CR111 16v
w
CP..113
CR114
2.000RV cOo,PRv 1002 1002
el ZC I 6T/0
E13O
E19
=200 -..,E.21
Deli 0_2-s
=.
2.4
sue,
pRoG61p, o.314.5015 I INSE_c-roN
RIGHTAUDIO
,-.6CT 4,0,010
(.../yso,,o)
,0-.
O sue a
Z _L,r"'S,4uTeQC2.T.- 0 ,
S102.
=.330 5,330
0 E2
OE. -0
a"'
0;ro9 SOB 2
0E"
2_35
0 400
01T0P
SUB
C3_ '2/ TP . 108 PGM OUT
0E 34
R I 3 I
R130 10K
1 0 K.
R152. 10K
--\/\.NP
IRv t I
4-10
2.W
C42.R3\115 12C43T/0
=220
+T3P0.150v4
R112. 2-7C1K.
RII4
10K
R5.1614K6
P -P +10
C 1 cl
S
RI 20 0 0
i
Ri2)
220
2411200
+0.6
11
lc. io 1
CA3018 ,2
4R1I'20.04
ci2.5 47
I
(.118 2.2
o 31ROwN
TP111
-4 Ss/ P -P
_ CI A7 To1
=2004A0,.. ORFULL,._
'0C_PLE 0t4
M10a
8113 22K
4.4
RitS R11 -
1000 ;OK
1411
10 LSUBSTRATE.)
2
RE
-TPi 13 7.SV P -P
R122
2200
121C
IS
qic,
-2.N5033
CRlibi. 0122
IN4154
5
TP1050
GND BLA.C.v. METERING AMPLIFIER 3c>ARD
R125 10
R12.8 3Wc.
-rP112.
ORANGE
R(2,
200.
HERO
ADS
R124. 1.1123- C124
10K IS
GPT
2121 1500
0
-41
.103
1000
12 zJ
22;00
NOTES:
UNLESS OTHERWISE SPEC_11-ThEr. ARE IN 01-1t"
1/2 1.4 , 1012, CAPACITOR v6o....0e5 ARS, 1N 111 CROFARADS.
2. El DENOTES T13 I O 'a
D DENOTES -n3101
4 A MASTER GROUND
5. INTEGRATED CIRCUIT 4 TRANSISTOR CONFIGURATIONS alms AWAY FROM VIEWER.
ice$ 4
(61 (
91
1i
3
I o
2
(E1
CA3018
2N3053
aN 30 54
2N3055
2N 3/40
SIMILAR TO 3476747
K
Figure 50. BTE-15A Main Frame, Schematic Diagram
M 102
FINAL
CURRENT MON k "roFt ExT.
ON- OFF COMMAND
11s1
41 31
21/,1
JIOI
THESE CONNECTIONS I N57 ALLED
IN ETE-IDP7 ONLY. LEAFFROM JI07-18 TO TERMINAL TE 1°2-41, ALSO DISCONNECTED ANII, TAPED 11.1 IITE- 1OAT ONLY_
J 102
REMOTE
STEREO I R.,c..t--k-r
I
SP.4"E 21 II
q®
3 5
K10,2.
G
ON LOCK - '7
st<, so, \./
7
- - 7
8 '9
22
34
0
09
JO
0
M lot I 5 00
24 '2.25 13/
_ -
k
CUT POff_JixT.
,Or
150 87BUFrEDRPk7E -R.
0 ac. 0 310,I-/A 6
do
011
PWQ, AMP
ok,..k7-P 07-
4
3 8
10 REM oTE
i=101
5103
RIO
12. 5.
Fr]
O
C126 .01
g/ +2.2_ g101 2N10
eD.5101
Pov4E.R
Q102
0.102I7
2NI 5293
55
25
..10 2.13053
-(!; TP101
+22V
0
0
a."'
C130 250
8103 470
C129 ,0
R137
IK
R104. 1.500
C.0;110 ---
0106
2n1 3565 CHI
.01
RI 05 1800
R10(,, 10 K
R107 10K
R22lo0y
14
TPiO2
CR1
CR II7 A IN475IA
c1
C 109
250
OR I 06
C.112.
. 0
10V
1W izciorio
R108
5K -^0.10113
=1S
JCR 10 ov
'ZC IETIO
O
En
C110001
CR102
0,11 544P.
5105
2.-"T
1HE--
C.,07
.01
ti:
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2.4 I.)W
L102
011
r0
J
C..10(o
.01
0810 I
0
L
MrY-V-YThrn
I-
',7 Z J ei
J r}-
4
re
ED
2-7Lv9H
- 024-
270 PR
R2.3 220 K
23
943
0t
2. '1
+22 I1
/500 0
CZY/-/Y- \D C.02071
M 0D. 0 5C.
t.3
97/98
77110_,Thr-scs,
I ZI2
( C28 .001
TP6 MCM,C9-07 P
0
14-
D
2C
CC 12
5-a s
7C C
O -77,) 10
TP7 V10
0
108 C 5'90 P
I4
s D1-3-
T P8 CRY
0
109 MC 890P
14C S G?
13
2C
C
c
12
5
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12
0
50 43B
7
II
GT
-C37
.01
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10
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QO
10
0
35
TP WHTC
C4S
22 OF 20 V
I R44
CR \ 6
10 K 1N4154
Ei00 E170'
C94 2.2 20 \I
R45 OK
of C4C, ...TsC 4-7
.022 2o v
1 O
R41 048 2200 .01
BR
12
4R7a0n0
CR14 IN 4154
(
14
C41 CRIS
_OI I N454
C-'12 I N4154--"-
R39 -042
100K .01
R4740I 0
I(
C43 .01
CP,16 1N14154
14
MCRIS IN4154
IN 4154- 4` R1-3
2200
R42
100K
T- 0.0414
R03070
R10o0o0
IC.14-
CA. 30I 5
12_
2
I0
2R24K-8
2R24K9
"AP
1R0s0oK
R 10 K.
10 K
OOTPN13 ±-1C.2429
CS 0
7 CR 9 1
K4.'
IN41 S4-
E9
2089
LEA0 .4777
ES
R51 - .471
1 5 K 3v
0 08
E6
55
051
K
.
7
C52
.001
LOS
MI -1
R1csoe.
5W
>10
. L05041-
0
AFC. UNLOCK \21
RELAX( SIGNAL. /
O-N)11 F C-
51
D\ Sr\BI.5_
E
E
C55 -
.001
.C0S0cri, .00c5)7I
X T
o sC.
S
LIVID ER OUTPUT
AFC. VOLTAGE
2.050t31,
\JOLT" A.G-E
=M
ES + 22 FROM REMOTE RELAY
>22
+22 FROM RF PowER. CONTROL >23
El
E2-
4R77010 E3
- E4 R-1 2. 4-700
DRIVER. CURRENT -16
PWR, AMP. CURR,E_NT 17
>14 R.S._MoTE Fl AV CURRENT N401.4 il-OR
>Is
.11 .1
ES
- R-73 K EC.
Pt.tR_ AMP. OLyt-Tu-t>13
G
GN-D
'
44
7ICI,262 r
NOTE:
1. UNLESS CT 1-s E_R t".1i SE SPE:11F ED RESISTOR
C.R/.ASAPiLSEuT-E2O1SP+A.O-5RR.EOVA,NNLMUOEOHSDMA,SRC1ED/2,S1\C1.MIC1AR0FO%CF. A5RDASDSA,RE
2.- u NZ.: ER Li NtE_D 1,4 GROS ARE FRONT PANEL CON -7k01 -S.
3474743 REV 7
.3.- IN'T E0RA-1-Co
TRANSISTOR 00NIFtGuRA-TioNS-..
PINS AWAY 'FROM VIEWER
1.1-5121110 9
4
4 5
MC F580 P
MC,0021-1,PP
6
8
CA S028
CA3018
(E)
(6)
(a) tr.suovr.NG
Ere -E15
:45E1
(C :ASE)
(
(B)
ON .1,86 2N 4057
(E)
c)
(B)
2-N3640
(B) (C)
21\14440 2N51 o2
(E)
2.N3054
2N44217
4. FACT)
eek.- acr &CD coivir>o
NOM/NA L VALUE SHOWN.
E Ta5,
co)5E
57
0
13.) FF EIR INPUT
Figure 51. BTE-15A FM Exciter, Schematic Diagram
MOD. OSC
L4. 2o HY
ReD
(A)
E,
(3)
'(EL
RII
GR
to
41-11-K/
Cis
2.7
7
0c0s1
o
orr,-034
4
.0052 1
.001
R I
.35K.
R2
16
C6 270 PF
.c0a015 zs
I NA/V-0
04-
R3
5514v
NOM
Et,
26
SESE
CR I _orE-41. 1N5240
0 0
CI
.001
R7b R77
IOK 10K
3R340
RS 2.2K
L I RG 27uH
470
SP
.47
410K
C.R2 9.78
MV340 ik
CR3
CF
r4v84c
22
R74 10 K CR4 1002
L3
2.7 u1-1
R75
10K CIORD1 2
270 PF
RI2
UH
4700
CIO
IS(sPaFe 1N..7).5,w04
__I5E1,, '40,"
CII, 15 Pr
Cie. 35 PP
4.1
R15
1000
CR9 I,AV840
CR8
ci2 NIOTE4
isPF NPO RIO 10K
CI 3-25
AAoFikC/ST
CI4
1-1.3
R 14-
22 LS
270 Pr
R IS
21
N41i 4427
CI1+C19
2P1F0 /0°
20V
MV840
PF
PF
0-
E?2,
E3
RIB
10 RI1 27
4R70190 C2.0
27 0 pi=
L7
2.7 U H
L33 .41 H
2Nq4427
C3-222S
59
1R02000
R2 1
^ 2C/2I
47
PI=
CI IN
R.
10,
R 79 100 C29
.001
+40
NC
AFC D.
CR/1 IN4154
14
R2S
2200
E30 Cto3P2F
4 0,
8
9 10 IL
IC I
MC 1027 P
21
TPI
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0
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S
3S
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la C 3S -
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3
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el
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4-1-22
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14
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II
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0
m0I30912oP
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2C
It
.001
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100 25v
R57
220o
s
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FREQ.
514
AD TO
3C-3394 SF
SIC
51=3 R31
2200
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TRIO
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3
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C
T
C
3
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0
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. c=3
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C95 IIItroo.0C0691
00 1 cac.
ic rh352V7
CR2.3 IN4151
LIE. /77 RFC
LI3
RFC
5141440-2
4R7G0B0
C91 27 35V
LI 8
551444.-3
I
014 amma=exml .001
L2c--3
111 111. MK. 41111111111111
L22
5A14-25-2 54.1425'
L23
5A1425 -
Cc, I
3-25
PF
2N33.:66
XC?.3
064
.01
066
C92
4.7
3-23
PF
PF
Li4
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PF
2N4440
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5I444/,4
CbC. loPF
- C13 .01
XQ 5
PS
2N-8102
3-25PP
017
3-25 PF
C. -76
3-25 PF
c79
3-25 PF
3-25 PF
cal c32
PF
2.2 PF
C.0E0.21
IRG4 4-7
066 3-23
F F
567 15
27 PF
9
.c0a071
4,21
7171 325
PF
.=C0m-o712
C87
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22
2,2
PF
,1==m.
R70 47
CR20
IN4154-
'Imownw
s.A/V R35 I oK
1r2ouC83
8321 100
-F9
34-
PILOT LEVEL
C43710 ---- 1R030'202
-c(,os PF
IW-40
R319 10 K
+6_5(:)E
R524 2200
350
PILOT
PHA -3E. 3LU
0 -119-RK3Hcz 4 SJ P -P -I-4.Z V
L301
10 NI H NOM,
C31 k
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2.5V P -P
1
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st FILTERED STEREO
,
55
F
-P
7
1-P 31 3 0
FL 302
L P. F LINEAR
12s
220o
IC 06(c)
CA.3col5
12
1700
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t9.52:4 P -P
R 5( 2
4700
- 321
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P 3
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1 LTG ,Dc_rrF.3J T
C 322
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FILTER
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R 5
1000
it
R3343G03
T '"C424
12
11
2
10
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9
CA 801
4 -
0 TP411 Co nr-o \-r3 CVTVVr OV DC
3,51 P -P
R1407020
lo K
3101
+13
41
9 2 IA
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P305
FED
0
+15
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0 CR 30 i0v iZC/07-/0
99/100
R.3.04 Icy IW
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3,_L) 0
a>15
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-15
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1=1
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DIODES ARE 200 Ply .5A
F4 E0
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A 4_,,/43
cR14309
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R.C3o-7K3
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._05,030
SW
0
0
> 20
41 KHa SCA DISABLE`
19
+
/15
STEREO REMOTC 25
0 9
CR312
G3 co
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3.31:.25 C P<31
R. C., H7-
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0
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-0 S
30-
LEFT REMOTE
21
0328
C1
j
MAST ER C..,P.OUNP >4
i-11E1-.17.)
COMPOSITE OUTPUT >1
COMPOSITE METER OUTPUT
18
7/1:6e431.
NOTES:
UNLESS 0-1JAL IJ ES ARE
RIN.1...0114SME 3E/2PE4C,1IF0%`D
5ES,,I
S7
-0R.
CAPACITOR
ARE
-0, ODES AIRS_ 11,44 \ 54.
R.,c)
ADS
2. INT `G.RATEiJ CIRCUIT -1R.At-4Si ".sT'c> R
CON FIG.) RAT ON 5:(PINS AWAY F Rom v,ENCR)
3
87 G
-3.1211 ,O 9 o
4_
3.
9
2
1 23 4 5 6 7
8
12
C/.. 3023
CA.B015 CA.3016
mC 590 P
De,
C
1\30S3
4 21,14037
3474744
REV 6
Figure 52. BTS-1B Stereo Generator, Schematic Diagram
PILOT
FRE_q tJE N CY
2.2-34 PF
R303 R304 1000 1000
FOR c'PE0 C-a.s E2
I C302 15 PR 1101,4
E3 01
76Y.30001C
KHz
1 iCaot CA5028
5
3
L302
.111Y
52'23000
8305 1000
R307 470
+4.v
R309
5311
2200
47
01301 2r4403-1
C.33)3
470 pp
4.5U P -P 74 IKH
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5437008
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II
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b
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TP 308
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R
L203
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11
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4
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C 3,
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id P -P
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0
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0
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7.1 5 0 15 KH z T..
R-635 10K
R340 4-100
R 3 42 4D 90
R343 4-700
5345 4100
8313
1000
r30s,
15312
2200
Ic..303(4) 'IA ',sate
3
5
4
v
15 317
1000
0 TP 302 3.3 KHz
4_5`,/ P -P + 2.5
.C04307e,
1010)5(31
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82321040 6 7
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+42.5.5 P -P
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IC 305(6) -8018
IC307 47 CR 301 N 4154
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4R130S.02
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ft.: 4 ,
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C3
4
c_i29
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8346
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5051
101K
R353 4700
R 354
2200
LEFT INPUT TP4o8
0 /EL
2.3v
C4 S
3-3
8436
a zoo
11
R 437
2200
N(Y:r1
35'T
5142076 "
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7
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I
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4R740403
YEL FILTERED P -P
or P410
0 44*,
47
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0 TP 409
/EL_ e RP
O V 00
8 CARRIER
e.AL..t.,4c.E.
0. R13050C0,
9
EMVAE5-1T,4 O-
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5451 R452
10K
10K 4-'700
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7140,
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IC 30G(5) A 3012
10
12425040
420
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R445 8448 4700 4700
544 7 10K
8433 47'00
IR4 55
4-700
STEREO GENERATOR BOARD
WM.
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AP ExT- MTR
DEFT
FL201 17K Ma
1.-PF
MONAURAL AUDIO BOARD
3209 11
E210
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FILTERED A, 0-0 T P2 04A GREEN
IA VP
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R213
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84272060
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R211
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R2I9
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I OK.
0227 10Ka
NOTES: UNLE55 OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS cARACITOR VAL.LIES ARE IN MICR0PARADS.
2. INTEGRATED CIRCUIT AND TRANSISTOR CONFIGURATIONS.
8
12
CA3015
203033
61-10WN WITH PINS A.R.( FROM VIEWER
'STRAP: A1%Z 043 709 ce: -it4-
:EgfAi9T6'"
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J
3471136 Figure 53. Monaural Audio Module, Schematic Diagram
103/104
R532 41K
RS'SS R517 41K .20K
R545, 330C+
SEE NJTE "1 FOR FILTER VALUES
LS0 \
L502.
R541
4100
R543
220
f0 C51 I
Z:. .1
C0S055
110--0
0--00-0 0-0
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8542
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5
icsc>.5 301e,
0.5121
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SEE NOTE
PART OF BD. 20. 209
514
Ala
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44 .45. LIGHTED + 1 5 T-4 07
LIGH-TED
E_31
STEREO SCA, MUTE EXTERNAL SCA MUTE
3476716
Figure 54. BTX-1B SCA Generator, Schematic Diagram Ser. No. 1 through 999
R252001 R282003
/ 220 I
R502 R2S2005
0/5.1
SEE NoTE. 5
O E9
E130
FREq
--VVR150V1050
+5.4
rir
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OR BUMPER
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II
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R105009
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+ CR S02
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855 OTHERKISE SPECIFIED RESISTOR UES ARE. 11N OHMS, 1/2 1,-1, 10 v. CAPACITOR UDEE5SAARREE. I1N1-1.1,e14I1CsR4.O. FARAPS.
GRATED CIRCUIT AND TRANSISTOR CONFIGURATIONS
AWAY FROM
ER.
3 4.567$ CA3018
Pe
2 N3053
ER.LINSD WORDS ARE FIR0N-T PANEL, c_oNerRot...S. L
1-A A.5 uREt-"E_NTS MADE WITH 20 K
METER:
RPWUU.I.T.THMATE4A0M0SAIU-XIRINEAMMLOE) DMNUT. LSAPTIEOANK,0-T-008rPAENApKt..Wyr,ITMHUO-TS-CILLOSACNODPE,
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UN
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12
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S< AF METEF 14< AF METEF
NC
105/106
.1.1111r
8532
4/ K
P2.336- R53-7 41K 120K
SEE NOTE -1 FOR FILTER VALUE
R7,41
4100
8543
220
1.52V03P -P
0-0 0----o 0-
)
C511
-r12 +3.2'
+..z.4
S 14
61
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R533 R554 R5'34.
IOK 4100 10K 22K
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22 K
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20
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27
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e071
2
+15 I0
ES
,-T'E.RE.0 SC 4 MUTE
EXTERNAL SCA, MUTE
11( .4er. 't
3177298 REV 3
Figure 54a. BTX-1B SCA Generator, Schematic Diagram, Ser. No. 1000 and Up
REg
F0S0I00
+5..4
05
+5.6 0
E -t
+ 5.7
0 ECG
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22 K
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501
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- 2525
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4.1 C25.250
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SS AORTHEEINRWOIHSMESS, PVE2CIFIE10DVRoE2AS,IPSATCOITR0R. E55AARiREGIN- tIeNN4ICIRSo4FA- ,Rp.--DS.
RA --TED CIRCUIT AND 7}-,ANSiSToR LoK)FIGURA-TiONS
;WAY FROM
112
to
C
.$
4.547I6
CA3018
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A e. OREMENTS MADE W MEASUREMENTS
-_4y1rTAHT40M0A-IXIMMUOMD.ULATION
ITN 20 I0 D5M
K A/ METER. INPUT\T)HMOUSTCINILGLOAKSHCoOPE
4R750507
gV P -P AU D10 4- 1.8
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I
C.052227--5R050508 As
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41 11-1-e. UNITS.
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qt- 0.507 050e. L501 Lso2 2514 0515 c...S1'6, 0617 CS,
$.'00 F.v" $!:4=E
4 -too
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Hz
8-32300P0rr
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UN
7 SO VT
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s '2) Afr
v-4.? ,++e,x7.6"4.
34.7L 74G.
Ar s /As.
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INAL VALUES SHOWN.
P563
28 K
e, V F. -I
C25.232
IC 504C.\ 30 t,3
7
4,2_41
-=,.`.3,D8
4-e\\ 570
470
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R25270.30
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I0 l< .022 100
0533- 0534
47
R572 OK
R587
10cD
DEL As(
13 < 67
IN
25< 6D7 Kt-ia IN 12<41 K.He
24< 41 Kr -le
4 <TELEMETRY
5 AF ME -TER 14\ AF ME ER
NOT
107
-yre-v-es
--inerry-rws TIOI
BLK BLK/ WHT BLK/
PRIMARIES
L101
RED
GRN
17
J103
C106
CB101
BLK/
WHT
0
18
1
t_ _ _J
CONNECTIONS TO TIO1 FOR 117 VOLT OPERATION
JI03 JI03
rre-rry-
evy-v-vvsrvd. TIO1
BLK BLK/ WHT BLK/
PRIMARIES
L101
RED
GRN
L_ J
CONNECTIONS TO TIO1 FOR 240VOLT OPERATION
miimisezimrs-ri01
ev-v-y-y-r-etry".
BLK
WHT BLK/
PRIMARIES
L101
GRN
1;) BLK/
WHT
L J I
_I
CONNECTIONS TO TIOI FOR 208VOLT OPERATION
Figure 55. T101 Connection
45mH
600
600
.125
IN
FROM
60011
GENERATOR
OPTIONAL DE- EMPHASIS NETWORK
2K016
RIGHT
LEFT
EGLIAL (L=R)
I
OFF -
- OPPOSITE ( L. --R)
TO
> LEFT
CHANNEL
L-
0
0
Ri-
TO RIGHT CHANNEL
R-
0
SCREW HOLE
MAIN PC BOARD
T501
IN GND OUT LOW PASS FILTER
2-1283 (MI -560721)
(OPTIONAL)
INSTRUCTIONS FOR INSTALLING THE OPTIONAL MI -560721 LOW PASS FILTER IN THE BTX- IB SCA GENERATOR.
I. REMOVE RIGHT HAND PC BOARD MOUNTING SCREWS AND SWING THE MAIN PC BOARD UP. DO NOT REMOVE THE LEFT HAND MOUNTING SCREWS; THEY ATTACH THE PC BOARD TO THE HINGE POSTS.
2. MOUNT THE LOW PASS FILTER AS SHOWN WITH THE SCREWS PROVIDED
3. WIRE AS SHOWN IN B.
4. SWING THE PC BOARD DOWN AND REPLACE THE MOUNTING SCREWS.
5- IT MAY BE NECESSARY TO READJUST THE FRONT PANEL MOD CONTROL SLIGHTLY TO COMPENSATE FOR THE LOSS CAUSED BY THE FILTER.
LJ LLLI
B
WIRING WITH FILTER INSTALLED
A
SCA GENERATOR (TOP VIEW)
WIRING WITHOUT FILTER INSTALLED
2K023
NOTES :
I. MATERIAL-THIS ASSEMBLY 2C1270-2 DOOR ASSEMBLY 2C1270-I DOOR OVERLAY (NOT SHOWN) R101 OHMITE TYPE 0314 MIDI API METER MODEL 302 0-50 UA MI02 API METER MODEL 302 0-200UA S101 CTS SWITCH 212-22920-2 9102 CTS SWITCH 212-22921-I S103 ARROW H 81 H CATALOG#80994-BD DSIOI LAMP ELDEMA C-LITE 1762, 28V, 40MA, YEL. WITH SOCKET DC40.
2. UNLESS OTHERWISE SPECIFIED
WIRE IS AWG #26.
3. 0 DENOTES TERMINAL ON TB102
-4------i-DENOTES TEFLON SLEEVE.
WHT/BRN 20"
WHT/RED 32'
ED
E-1 WHT/ORN 32" ®W4H4-T/YEL 28"
32 WHT/GRN 28" I
E9 WHT/BLU 28" I
37 4 GRY 28"
a WHT/BLK 20" 4 WHT 24"
6( 5101
Aim
Ai"' 4 ,
A11444...
.r65/ ..
SIO"I.',,2
fiilik
I jik
i
4WHT/V10 28' oat
El ,WHT/GRY 28" 41
rrii A- .44WHT/BLK/GRY 281
Pr
1 r
1
Tid,t/4110
EI .4BLK 20"
I
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1
#22 BLK/WHT
FROM
PC101
BOARD
2082070
113/114
2K032
#22WHT/YEL 16"
RED
E.41#18
16"
1
El #22 WHT/GRY 16 tr' El #22 BLK 16"
DSIOI
#18
RED
#18
RED
Figure 59. Main Frame Door Assembly, Wiring Diagram
21C2/47K
3 AL,i 3740091
TUBING SHRINK HEAT WITH COVER AND VK200/4B CUBE FERROX
P2
10
BLK
> 14 T GRN/ 17" BLK
[>.
BLK
16
WHT/V101
1/2" 115
WHT/BRN
/.11>
12"
BLU
'' 11
WHT/RED
11"
WHT/BLK/BRNE>
13" I
RN WHT
>
1/2' I11 WHT/YEL
1/2" ID
WHT/BLU
1/2" 14
T /WM N CT.
1/2' 112
RED
I> 13" ORN I
D 1/2" 13 ORN
PI J1 TO
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e (E6)
OSC.
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ll
C27 113RN WHT
(E2)
(El)
0
GENERAL INDIANA C26
AR9102 BEAD FERRITE R24
ORN
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0 C52 (E16)
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I
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io
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11>
so WHT
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1
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X 4 1 VIEW TOP
D
SEPARATE '1'1- N
ti
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1
.2.
5A1669 STRAPS----., GROUND
PANEL) ON (CENTERED 8" GASKET RF
A1419 5
5A1409
SINK -HEAT
BRACK
RFA
ET\
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L 'Lj
u
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PLATE
5C1414-1 PLATE
581367
PANEL
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\:C 1269 BASE
r
5A1635 PER MODIFIED -2 PDLN 100 LORD MOUNT SHOCK
HEAD FLAT 5,'8 X 6-32
5A1669
STRAPS
5B1389-3 581339-4
- 581410-1
HANDLE
3 REV 3740084
T BLU/WH GRN/WHT
.001
THRU - FEED BRADLEY - ALLEN
BLU WHT GRN WHT
WHT/YE T,VISTED
BLK WHT
Pf 1-10
-280 NVC
JFD 5A1420
40L-LOCKWASHER
T -I/W1 EL Y
2CI282 CHASSIS
TH 107 SITE FU
PI
L__J
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r
YEL RED BRN
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07/
1
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16
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AR9102
L225
GRN BEADS FERRITE
4
2 20A20t BD.
YEL
CIRCUIT PRINTED
5A1417 ON MOUNTED
I
Pf 3-34
5A1427 COUPLER
5A14L
SHAFT
POST
OF TOP
TO WIRE 5
SOLDER
._
6
\A\ I
10
11111
POST OF TOP
D WHT/RE I XTAL
30A0004 OVEN & XTAL
2
8
XTAL
r-
3054 N 2
A
B
2(46k 21C
GENERAL INDIANA
- AR9102 BEAD FERRITE
DETAIL TOP
.2
5
OSC MOD
WHT/BRN
27 C 26 C
J
TO
8
3 1/2W 1000 R279
WHT/ORN
4
5
L YE WHT/
6
WHT/GRN
9
WHT/RED
10
WHT 30
BLK
C56
C29
AFC
C55
rC54
1
XTAL QE
2N5293 208 Q
SMITUR ST OFF STAND SELECTRO
A A- SECTION
POST CAPACITOR OF TOP TO
WHT/YEL
OUTSIDE ON MOUNTED
2&4 ;8 6 PINS BETWEEN JUMPER REMOVE
-e,B SECTION
R59 TUR SMI ST
SELECTRO
3740091 ASSEMBLY NEXT 3.
3476743 SCHEMATIC, 2.
:22 AWG
IS WIRE
. I
NOTES
SEALECT PO -1-S -350
C9E,
C4,
,NESCO 69012-0022 C97
119/120
CA101310N 3650-I 21 RED D
U,-.3 -'094/ SOLDER 1 N
501395-I -/dr
UG-1094/ U SOLDER IN
DENOTES SELECT ED VALUE
MA/ELT AD
ST -S11 -1 -TOR
F---
..--,_:____-&
-......"-- LIZ
SAi.46
NOTE: RESis-TA1AAcE IAA 0111'15 AND cA fisic/r4ovez- iN PAcoi--ARA92?S o'v E55 SPEC/F/ED.
095
MAKE LEADS AS SNORT AS POSSIISLIt ON COMPONCSITS TO IMAM STAtIDOrr
___.
c:-,4 0
LIS
- VA...6-S
1111
IN
SAIL.ti-L \\(.°LIB
YfSt .
RL3
L14
.........---- LI/
--)) so, i4.44-1
.15.414.6-Y
\--.
.--
4 TWINS it L21
sAt4,23-x
0 41., ANS A IL ....1 Is 22
SA1.231-2
.TURNS Olt
OM: 2. 3
SA ALS-2
0
11;2...)
I
1
5C 1393-
SC 1393-
SC1593-3
5C 1393-4-
5131280-6
2NS102
PERROXCUBE YK206/411
AND COVER 14/7N y4177
51/R/NK TOR/A/6.
P2
HEAT SHRINKABLE TUBING
2/Ca 12 7P
37 4009 0 REV
Figure 62. Exciter, RF Amplifier Assembly, Wiring Diagram
SCALE 1/3 PATH BUNDLE
PANEL FRONT
3476744 SCHEMATIC 5.
P301
O
O 2062064 BOARD ON PIN DENOTES
O 20A2065 BOARD ON PIN DENOTES
a, 1P37041/UO-NRPGINIS
DENOTES CABLE COAX
4. 3.
#22 AVVG IS WIRE HOOK-UP 2.
581366 OVERLAY FRONT WITH 2C1268 CHASSIS 1.
NOTES:
2082064
20A2065 -BD SUB STERO
P301
OUTPUT OMF'OSITE C
- SHIELD
- +40
- GND
MTR. EX1. AF [LEFT
-CND
16 & 15 TERMS. BETWEEN
2162139
BUNDLES DIVIDE
Q
PICTORIAL ASSEMBLY
V2-/'
-0 405 ARCO YEL C421
OUT --CD-
(7),
" 81
Ansi\
ENDS
TEST
FINAL IN
SOLDERED
2-1276 FL401
-OY
FINISH
0
DS301 S301
doh 9 10 2
T401
18" BRN
16" \L2-;
ENDS FINISH NOT DO
MTR.
AF (RIGHT
OUT MTR COMPOSITE
>1 DISABLE
SCA KHZ .{41
DISABLE SCA KHZ {41
14" WHT
8" (941HT/ORN " 16 (\/VFIT/BLU
16" BLU
6
4 3
WHT/BRN/BLK
1
16" 84/HT/V10
OUT BLU
1
BLK 1262 2
FL302
M6 1 WHT/BRN
/BT4LK01
1WHT/V10
-15 I
REMOTE _
LEFT
REMOTE
(RIGHT
-+I5
REMOTE
11>
STEREO
14' WHT/RED 20' WHT
S301
20" S303V4T/BRNALK
4" RED 20' BLK/W
S302
IN
25"
16'
RN 0y.HT
1
/ BLK WHT/BRN
T301
WHT/V106
6
1
LEFT IN OHM 600
RIGHT IN OHM 600
O 17.1 WHT/YEL
17"I YEL
O 17"I WHT/VIO VIO
Y-E0L
4 3
WHT/BRN/BLK
1 130 1
;
16" VIO QWHT,
/ OUT
18"
17"(------"Thi
405 ARCO C330
2-1276
-0 0 3 L F 1
YEL
OM C
BLU
INN
CE
18"
WHT/YEL
1
YEL
ENDS FINISH
VIO
O 1WHT
VIO
25" ...
BLK
0.W II
..V1200/11 S303 D 20"
...BLU/W 5303
I 20'' ....GRN/W1 DS301
1 20."
..YEL/W S301
20''
DS302
20" BRN/W
S302
20"
TEST FINAL IN SOLDERED
S301
281-0
GRY 20"
T/GR WH I
20" BLK
GRN
CC 100K R359 CW
CCW 1K
R356 CW
ORN
IWHT/BLU WHT/BRN/BLK
RN /WHT
IWHT/BLK EL WHT
WHT
17"
RIGH S303
RED
.01
0326
STERE 5302
YEL
LEFT 5301
GRN
CCW
1K R322 CW
10 WHT/V -2187 RCS
DS303-CF03
WHT/ORN ACS-2187
DS302-CF03-
GRN GCS-2187
DS301-CF03ORN
PANEL FRONT
ORN.alig pf 9-54
C301
WHT/ORN
COM
FL401
OUT FL302
-7 T40 IN
FL401
COM
FL401 OUT FL401
CCW R359
IN FL301
OM C
FL301 CW
R359
BRN WHT...
OUT F1301
CCW R356
COM
FL302
CW
ARM R356
BLK I BLK
ORN YEL
2082064 BD. GEN. STEREO
SOLDERED IN FINAL TEST
T 301 UTC A-20
F L302
2-1262
T4 0 I UT° A ZO
SOLDERED IN FINAL TEST
F L 4 01
2-1276
co
BOARD 20A2065 -
BOARD 20B2064
NO TES 1 BRACKET 515111-H
2 WIRE 15 ANN, 4 22
3 COAX IS RG- I74/U 4 NEXT ASSEMBLY 3140089 5 * COAX. CABLES FROM FL ,;)1
FL401 MUST bE EQUAL LENGTH
HEAT SMR N TuDING
3740093
SLIP<
:5/ I -20
r--
,--- P201
ra.T.APH: t -f -Z oa 50
- 422
SEAL COTTRO
iTuR
3 1FKO'D
CLIP THE Z YELLOW WIRES OF THE 2-1276 IN5IDE POTTING
COMPOUND MAKING SURE NO 4544ORTING" OCCURS_
YzA 0A,6LE LA.-ioor
t2409
z -r NI
F
OI
5 F5 V5.e.c.i5
OV 6RA_tIPo.,"-(-int_sna5
C. 5 e, t
\ vosal -3
H01,1,
n<I>k-r7A-+C.C)
- V C. \A./ \
-
1
<
41R.Y
1-1 077 E...J
.
tr Ca
Comex 1 S RG - 1744-/u
IDEN0.-ra
on.) Paco
s:31,-P:::$7-E.Th PIN-) Ot..1 PC, C3Up. ZOA7_06c,
3K0I0 DERIVED FROM 3740083 REV 0
-
Grof
T OW-
FL201
FL 2O/ T201-12
T201-7 7201 6
T201 1
CA tl
OP' v«PIN
((i
YC L 4-v,..r
sk.i %Leo
43 2 CH
0 4 * 3
RC. 504..R.C) 2-oA.206
Figure 65. Monaural Audio Module, Wiring Diagram
3476736 SCHEMATIC 5.
o 20A2069 BOARD ON PIN DENOTES
0 20A2068 BOARD ON PIN DENOTES
P401 ON PIN DENOTES ZI\ 4. 174/U - RG IS CABLE COAXIAL 3.
22 * AWG IS WIRE HOOK-UP 2.
5A1365. OVERLAY ONT FR WITH 2B1267 CHASSIS 1. NOTES:
P501
3740088
P501
SCALE 1/2 PATH BUNDLE WIRE
PANEL FRONT
- OUT SCA
{ OUTPUT METER AF KHZ 41
- GND - OUTPUT METERING
INJECTION KHZ 41 PUT N -TELEMETRY
OUTPUT METER
AF KHZ .t7 110
MUTE SCA -STEREO
OUTPUT METERING
INJECTION KHZ {67
MUTE SCA -EXT.
20A2068
CHASSIS
5A1452 STRIP BACKING WITH 20A2069
BD. SELECT OPT SCA
CHASSIS
>24 YEL/W GRN
RED/W
> ORN BRN GRN/W BLU VIO/W
2124 SMITH OFF STAND
WIRING LINE DOTTED USE
FILTER BYPASS
GRN
BLU \-TO
OUT
FL501 P.F L. 5KHz
2-1283
IN
BLK GRN
YEL/W WHT RED
GRN ORN
BLK/WHT
WHT WHT
YEL V10/ GENE
CCW R506
CW R506
5K OUT
R546
(;)
CCW
(OFF)
R506
5401
RED
YEL
ARM R506
ARM
(ON) BLK/W
CCW
R515
S401
R515
VIO
BRN/W
GRN CW
W
ARMGRN
BLK/W
DS501
ORN/W
R515
/15 R587
DS502
BLU
WHT
RED/W
VIO/W
CW
CCW
R546
R546
BLU/W ARM
R546
_DS502-CF03-RCS-2180
RED 12
RED/WHT,
WHT
BRN/WHTc)
4. 100K
A, DELAY R587
CCW
BLU
VIO
GRN
DS501-CF03-GCS-2180
CW
1K FRED R515
CCW
D5501
20A2068 BOARD GENERATOR
SCA BTX-1B
RED 1501 ORNART--0. CW
OUT FL501
PANEL FRONT
129130
Broadcast Equipment
Supplement 1
BTE-10AT FM
Broadcast Transmitter
ES -560698 and ES -560698A
Communications Systems Division/Front and Cooper Streets/Camden, New Jersey, U.S.A. 08102
131
EQUIPMENT LIST
BTE-10AT FM BROADCAST TRANSMITTER, CABINET MOUNTED VERSION, ES -560698
Quantity
Description
Reference
1*
BTE-15A FM Exciter System as Specified on Sales Order
BTE-15A FM Exciter System, Mono
BTE-15A FM Exciter System, Mono and 1 SCA
BTE-15A FM Exciter System, Mono and 2 SCA
BTE-15A FM Exciter System, Stereo
BTE-15A FM Exciter System, Stereo and 1 SCA
BTE-15A FM Exciter System, Stereo and 2 SCA
**
Spare Crystal Unit
**
Set of Spare rf Transistors
1
Panel, Blank
1
Cabinet Assembly
1
Installation Material Kit
ES -560631 ES -560632 ES -560633 ES -560634 ES -560635 ES -560636 MI -560717-* MI -560718 MI -36547-1 MI -560304-A MI -560883
*Crystal unit to be ordered to suit customer's assigned frequency. **One supplied if and as specified on sales order.
BTE-10AT FM BROADCAST TRANSMITTER, RACK MOUNTED VERSION, ES -560698A
Quantity
Description
Reference
1*
BTE-15A FM Exciter System as Specified on Sales Order
BTE-15A FM Exciter System, Mono
BTE-15A FM Exciter System, Mono and 1 SCA
BTE-15A FM Exciter System, Mono and 2 SCA
BTE-15A FM Exciter System, Stereo
BTE-15A FM Exciter System, Stereo and 1 SCA
BTE-15A FM Exciter System, Stereo and 2 SCA
**
Spare Crystal Unit
**
Set of Spare rf Transistors
1
Installation Material Kit
ES -560631 ES -560632 ES -560633 ES -560634 ES -560635 ES -560636 MI -560717-* MI -560718 MI -560883
*Crystal unit to be ordered to suit customer's assigned frequency. **One supplied if and as specified on sales order.
TECHNICAL SUMMARY
ELECTRICAL SPECIFICATIONS
Power Output
10 Watts
All other specifications are identical to the BTE-15A. Refer to the BTE-15A TECHNICAL SUMMARY at the front of this
instruction book.
MECHANICAL SPECIFICATIONS
Exciter Height, inches (cm) Width, inches (cm) Depth, inches (cm) Weight, pounds (kg)
Cabinet Height, inches (cm) Width, inches (cm) Depth, inches (cm) Weight, pounds (kg)
Net 10-1/2 (26.7) 19 (48.3) 12-5/8 (32.1) 40 (18.1)
Net 17-1/4 (43.8) 23-1/2 (59.6) 17-1/4 (43.8) 20 (9.07)
Shipping (approx.) 19 (48.3) 24-1/4 (56.5) 17-1/2 (44.5) 59 (26.8)
Shipping (approx.) 22-1/4 (56.5) 28 (71.1) 24 (61) 35 (15.9)
132
Figure 67. BTE-10 AT FM Transmitter ES -560698
DESCRIPTION
GENERAL
The BTE-10AT FM Broadcast Transmitter consists of a standard RCA BTE-15A FM exciter system, together with provisions for power output determination. The BTE-10AT is available housed in a metal cabinet or without a housing, for rack mounting. The version which includes a metal cabinet is identified as ES -560698. The version intended for rack mounting is identified as ES -560698A.
The BTE-10AT FM Transmitter provides an rf output of ten watts at any specified frequency in the FM broadcast band. By selection of the proper BTE-15A Exciter System combination, the BTE-10AT may be used for transmission of monophonic or stereo and SCA signals. Low distortion, wide frequency response, ease of adjust-
ment, and high reliability are characteristics of this
equipment. All circuitry is solid state.
The BTE-10AT is designed to conform to FCC
requirements for educational transmitters.
When stereophonic operation is desired, the
BTE-10AT Transmitter should include The BTS-1B Stereo Generator. If, in addition, SCA operation is
desired, the BTX-1 B SCA Generator should be used. One or two additional SCA program channels may be transmitted along with the regular FM monophonic program channel. When stereophonic programming is transmitted, only one SCA channel may be utilized, using a 67 kHz BTX-1B SCA Generator.
For circuit description and information on technical features of the BTE-15A, see the DESCRIPTION section at the front of this instruction book.
Power output is controlled by R101, the RF POWER ADJUST control. Ten watts power output is provided when M101 indicates 100 (full scale) with the MULTIMETER switch set to the PWR AMP OUTPUT position.
133
INSTALLATION
The installation Material Kit, MI -560883 provides the components required to complete the BTE-10AT Transmitter installation, to be used with the BTE-15A Exciter
System and cabinet items. A power output metering modification is also included, enabling power output determination in compliance with FCC regulations.
The power output metering modification consists of a simple wiring change in the BTE-15A main frame, MI -560710. Although normally done at the factory, this wiring change is described for reference purposes only, as follows:
1. Remove the BTE-15A Exciter Main Frame bottom
cover and make the following changes. Refer to the schematic diagram, Figure 50 and the wiring diagram,
Figure 58.
A. Disconnect and tape the brown/white wire at
TB102-46.
B. Connect the precision metering resistor (MI 560883 item 3A) between TB102-46 and TB102-57.
C. Ground TB102-56 by connecting it to TB102-55 with a short jumper (Part of MI -560883 item 3D).
WARNING
Check that pins 1 and 3 are connected on the dummy plug, and that no other connections are made on the plug. Installation of an improperly wired
dummy plug can cause extensive damage.
D. Install the dummy plug (MI -560883 item 5) in the K101 socket. Refer to Figure 11.
E. The BTE-15A is normally supplied with the transformer connected for 115 Vac input. For other
line voltages or to check the line voltage connections, refer to Figure 55.
F. Install the blank panel, MI -36547-1 at the bottom of the cabinet with the hardware provided with the cabinet, as shown in Figure 67.
G. Replace the BTE-15A Exciter Main Frame bottom cover.
NOTE: Wiring changes outlined above are shown in heavy lines
on the upper left corner of
Figure 50.
2. Mount the BTE-15A Exciter Main Frame in the BTE-10AT cabinet, using the hardware provided with the cabinet.
3. Install the Type N to BNC coaxial adapter
(MI -560883 item 2) at the TRANSMITTER connector of directional coupler Z601. Directional coupler Z601 is supplied preassembled to panel assembly, MI -560883 item 6.
4. Install panel assembly, MI -560883 item 6, immediately above the BTE-10AT Exciter Main Frame using the hardware provided.
5. Install connector plug P602 (prewired to panel assembly MI -560883 item 6) at J102 on the main frame.
6. Install cable assembly (MI -560883 item 1) between the BTE-10AT rf exciter output jack J2 and directional coupler Z601 TRANSMITTER jack, utilizing coaxial adapter installed in step 3. Refer to Figure 68 for connector cap assembly details (M1-560883 part of item 6).
11/16
5/16
1
1.
3/32
5/16 7/16
11 P, CRIMP, SOLDER
7/32
1111
gall=i2nEilffBlU3SH3ING1:3RE-SHISTOR'
TUBING
SHIELDED DC LEAD
0
TUBING CONNECTOR ASSEMBLY
THE CAP ASSEMBLY SUPPLIED WITH THE COUPLER CONSISTS OF A CONNECTOR, BUSHING, RESISTOR AND TWO LENGTHS OF TUBING. THESE PARTS MUST BE ASSEMBLED TO THE SHIELDED LEAD AS
OUTLINED BELOW.
!KOS!
Figure 68. Connector Cap Assembly Details
7. Connect antenna transmission line to the LOAD connector jack on directional coupler Z601. The transmission line coaxial connector is provided by the customer.
8. Make audio (program) connections using MI 560883 item 3C connectors.
9. If connections through 1101 are to be used, wire and install connector plug P601 (MI -560883 item 3B).
10. Set CB101 in the OFF position (see Figure 11).
11. Set the RF OUTPUT switch, S103 to the OFF position (see Figure 6).
134
CAUTION Before applying ac power to the
BTE-10AT, make certain that the ac power line voltage is 115 volts ac. For other line voltages or to check line voltage connections, refer to figure 55.
12. Install the ac power cable assembly (M1-560883 item 7).
13. The BTE-10AT FM Transmitter is now ready for operation.
PANEL ASSEMBLY PART OF MI -560883 ITEM 6
INSTALL P602 PART OF MI -560883 ITEM 6
INSTALL P601 M1-560883 ITEM 3B HERE
INSTALL AC POWER CABLE
ASSEMBLY --MI-560883 ITEM 7
HERE
' -7
1
om mit tmiaow Me um MtlArt ' . L71 IN idg mg mmi mu OW gm lut
lot MI MN MI ME ME wr irll>c I11>ot In
: 7P. no IL% 11111 NI in MI NM MR
".
Poi wit flu pm mu pi so mio
Ai: A Ian iONP
1.e Ela sou Ira
SMIN I
VAI
z
INN
iIf/PEEINNC
ad NE Wit
NIOD
NOil 0111
Mt
.maw! r war t,e't ' NW Nit.
.11
I
--Z. ILA
prz
1111
NIN
1111
ri= to
1111
Pqr
Figure 69. BTE-10AT FM Transmitter, Rear View
2601 COAXIAL ADAPTOR MI -560883
ITEM 2
CABLE ASSEMBLY MI -560883
ITEM I
INSTALL AUDIO
CONNECTORS
MI -560883 ITEM 3C HERE
I K060
OPERATION
The BTE-10AT FM Transmitter may now be put into service. For detailed operating instructions, refer to the Operation section of the BTE-15A instructions.
No provision is included for use of the "indirect" (efficiency factor) method for power output determina-
tion.
With the output metering circuitry now provided, the "direct" method of power output determination is em-
For FCC application purposes, the efficiency factor "F" for the BTE-10AT, operating at 10 watts power
ployed. When M101 reads 100 (full scale) with 8101 in output, is 0.83.
the PWR AMP OUTPUT position, power output is 10 watts. Adjust R101, the RF POWER ADJUST control, as required.
For typical panel meter readings, refer to the table on page 20.
REPLACEMENT PARTS
Symbol
Stock No.
Drawing No.
Description
P603 P601 P602
921359 211509
32661 55808 54254 101966
424269 243867 426159
MI -560734 1510013 101
481799 001
878243 001 727969 008 727969 018 3722886 007 3722890 001
8544669 001
8528981 001
SET OF CONNECTOR PLUGS FOR BTE-15A CONNECTOR, UG88C/U (CONNECTS TO J2, J108 AND J111) CONNECTOR, AUDIO (CONNECTS TO J109, J110, J112
AND J113) CONNECTOR, 2 CONDUCTOR (CONNECTS TO J103) CONNECTOR, 8 TERMINAL FEMALE (CONNECTS TO J101) CONNECTOR, 12 TERMINAL FEMALE (CONNECTS TO J102) DUMMY PLUG (SUBSTITUTE FOR K101) DRAWING, DUMMY PLUG WIRING INSTRUCTIONS
CONNECTOR, COAXIAL (ADAPTER BNC-N) RESISTOR, CARBON, 1 500 OHMS 1%, 1/2W DIRECTIONAL COUPLER
Broadcast Equipment
135/136
Supplement 2
BTS-1B
Stereo Generator Complete with Rack Mount and Power Supply
ES -560639
Communications Systems Division/Front and Cooper Streets/Camden, New Jersey, U.S.A. 08102
Quantity
1 1 1 1
EQUIPMENT LIST
BTS-1B (RACK MOUNTED) ES -560639
Description
Main Frame BTS-1B Stereo Generator Module Extender Set of Connectors
137
Reference MI -560711A MI -560713 M1-560719 MI -561322
TECHNICAL SUMMARY
ELECTRICAL*
Output Power Line Requirements
3 5 volts peak -peak, nominal 117/240 V ±5% 50/60 Hz
MECHANICAL
Height, inches (cm) Width, inches (cm) Depth, inches (cm) Weight, pounds (kg)
3-1/2 (8.9) 19 (48.3) 10-5/8 (27) 19 (8.6)
5-1/2 (14) 20 (50.8) 13 (33) 24 (10.9)
*For additional technical information, refer to pertinent information in the BTE-15A TECHNICAL SUMMARY in the front of this book.
138
Figure 70. BTS-1B Stereo Generator ES -560639
DESCRIPTION
In addition to use in the BTE-15A FM Exciter system, the BTS-1B Stereo Generator is available in a separate housing and with a self-contained power supply, for use in other applications.
A typical application for the separately housed BTS-1B Stereo Generator would be to convert a monophonic FM transmitter installation to stereo operation.
FM transmitters using "Direct FM" modulation are best suited to this conversion. A transmitter utilizing the RCA BTE-10C FM Exciter is suitable for use of the separately housed BTS-1B Stereo Generator.
Program output level required for full transmitter modulation will vary, depending on the characteristics of the FM exciter in use. For example, where the BTS-1B Stereo Generator is used with an RCA BTE-10C FM Exciter, it is recommended that feedback resistor, R471,
in the BTS-1B be changed to 27,000 ohms, 1/2 watt, to reduce the program output to approximately 1 volt peak -to -peak with 10 dBm audio input. This level provides approximately 100% modulation of the FM signal when using the BTE-10C Exciter.
Similar simple circuit changes may be required with other FM exciters. Any changes required may be determined from a study of the exciter instruction manual.
Operation and maintenance of the separately housed
BTS-1B Stereo Generator is similar to that for the BTS-1B when part of the BTE-15A Exciter system.
Refer to the appropriate section of this instruction book for detailed information. The separately housed stereo generator main frame schematic diagram and main frame wiring diagram is presented in figures 72 and 73 respectively. Power supply board parts location information is presented in Figure 48.
139
S
.40
4 40
Main Fra me - EITS - 18 MI -560711
See
I K052
Figure 71. BTS-1B Stereo Generator, Rear View
Symbol
Stock No.
REPLACEMENT PARTS
Drawing No.
Description
F7,11 J7,,1 J7,17
J7J3 J7)4
.J7J
X17)1 M7o1
4273d3 245131 245131 211511 21151' 223973
48894 430531
C701
432444
c70;7
432444
E7o3
432444
c7r14
428u44
C715
428J44
C7eb
428044
cR71 THRJ
cp7,q,
234552
CR7k,7
CR70P L701 L7o2
P7,11
0701 0702
24512P 245125 245137
2451.32
248265 213054 24125)
8702 S701 7701
07,)1 070,,
522122 225745 423o19 248361 24836?
211501 921351
BTS-1B MAIN FRAME ASSEMBLY MI -560711
FUSE 1/4 AAP SLM H. LM CONNEcTOR COONEcTuk COANEcTOR AUDIO CONNECTOR AUoIo CONNECTOR 8NC FUSE DPST HOLDER
kIETER
BTS-1B POWER S UPPLY ASSEMBLY
.01 OF 6u0V
,01 OF 6000
.01 OF 600V
1500 LF 50V ELECT
1500
50V ELECT
1500 OF 50V ELECT
0IODE - TYPE 1002 IIDDE - TYPE 1ZC16T10 ZENER 111JOE ,. TYPE 1ZC1(3T10 ZENER REACTrk - RF CHOKE REACT 'R - RF CHOKE
CONNECTOR TRANSISTOR - TYPE 2N3u54 TRANSISTOR - TYRE 2N3740
220 (10DS 10% 2W COOP SWITCH TOGGLE SPST TRANSFORMER SOCKET TRANSISTOR SOCKET TRANSISTOR
SET OF CONNECTORS MI -561322 CONNECTOR AUDIO (CONNECTS TO J703 AND :704) CONNECTOR "CP uG-88C" (CONNECTS TO J707)
SUGGESTED EQUIPMENT SPARES
Description
Capacitor, Electrolytic - 1500 MF Fuse - 1/4 Amp Slo-Blo One each of all integrated circuits,
transistors and diodes (1ZC16T10, 10D2, 2N3054, 2N3740)
BTS-1B MAIN FRAME'
Symbol C704, C705, C706 F701 MI -560743
Quantity
1
5
1
Stock No.
423020 300124 80395
*For the Stereo Generator spares, refer to the BTE-15A Suggested Equipment Spares.
141/ITT
-0Et
S.EC
ME'ERING
L0,1_,E5 OTHER...051, 50E,FIF RESISTOR .0E, 11E5 APE 14 ,11
2
P
bOAqb , A 5466
,
PONE N' I AYOU! ,0.42154
P
1
0_ A,,,G1T,
POWER SUPPLY BOARD
RED
5IA5129, 2042071
POWER SUPPLY SLIDE
RED/YEL
[ RED
EC PoEuEl,
F
4
T701
3-1035
BLU/YEL7
01
L701 L702 2.4M4 2.4uH
370
---
METERING
6701
AMTEPRBINDGO 5145466
20A235.4
I
I
1110
O
goTA0
WA)
cv
c
CR 701
1.
CR7 03i
CR CR704
R701 CR707
2w
CR708
6y
4702
-DI I
CR706 1002
G
____
I
7--c7. I
.1. 1500 I 1
GNDVGNVJ 14ABAAA6A- 17 3
3Z:Y7
METERING AMPLIFIER BOARD SCHEMATIC
STEREO GENERATOR MI -540713
9106263 21C2142
4 r AkAAAAAA3P301411-4
0
p
F701
.25A
NOTES: I . UNLESS OTHERWISE SPECIFIED, CAPACII0k
VALUES ARE IN MICROFARADS.
3742605 NEU 0
RI
T
AUDIO INPUTS
3702
ONO
A7 (.:1-/.0)5
--/ OUTPUT
ROTES
UNLESS OTSEIREI. SPECIE!.
RESISTOR VALUES ERE IN 021213,1/2 Of .10%
CAPACITOR VALUES RE IN MICROFERAOR
2 P. C SPERO 5,A sEEE SCHEMATIC 91 2982
METERING AMPLIFIER BOARD PARTS LOCATION
Figure 72. BTX-1B Stereo Generator Main Frarne,Schmatic Diagram
J702 TO STEREO
143;144
J701
TO POWER SUPPLY
(AAAAA
A A
VS MD 41.
=MNIMO
ONIMMMMIM
BL K/ BLK/
RED/
RED
BLU
BLK
WHT WHT
WH T
20"
9" 9"
WHT/ ORN
10"
J701 OUTPUT
WHT 10"
J701Z
rJ701
B L U/N1 HT
10"
J701 J701
BLU/WHT'
ORN
S702
WHT/ORN J702
REMOTE
GND
FUSE FUSE
5702
117V 117V WHT WHT
J701 J701
I
1
J702
0
AUDIO INPUTS
RIGH T V I 0,,IW
LEFT
YEL
YEL /WH T
J704
J702
J703
OUTPUT
BLK
I-- REMOTE -i
S GND R L
J701
NO--TES :
vo,&702
1-- WIRE -g22
COAXIAL CABLE RG-174/U
J701
2. ASSOCIATED DWGS:
EXPLODED VIEW 21C2152
SCHEMATIC 91 86295
PWR SUPPLY SLIDE ASSY 21C2183
STEREO SLIDE ASSY 2102142
BLK
GRN
RED/ WHT
10"
J701
J701
REMOTE REMOTE
L
R
FUSE F701
.25 AS. B.
WH T
VI 0 WH 9" 9"
V
LEFT RIGHT
AUDIO AUDIO
IN
IN
REMOTC
S
BUS H KP
CAMB I ON 3650-2
SMITH 939
3732376 REV 2
J705
BRN WH T
BLK WH
J702
21[32.184C
Figure 73. BTS-1B Stereo Generator Main Frame, Wiring Diagram
Broadcast Equipment
145/146
Supplement 3
BTX-1B SCA Generator
Complete with Rack Mount and Power Supply
ES -560640 and ES -560641
Communications Systems Division/Front and Cooper Streets/Camden, New Jersey, U.S.A. 08102
Quantity
1 1 1 1 1 1
*Specify SCA carrier frequency
EQUIPMENT LIST
BTX-1B (RACK MOUNTED) ES -560640
Description
Main Frame BTX-1B SCA Generator Module Extender Blank Panel 5 kHz Low Pass Filter (installed) Set of Connectors
147
Reference MI -560720 MI -560714-* M1-560719 MI -560715 MI -560721 MI -561323
BTX-1B (RACK MOUNTED) (ES -560641)
Quantity
Description
I
2
1
2
I
*Specify two SCA carrier frequencies
Main Frame BTX-1B SCA Generators Module Extender 5 kHz Low Pass Filter (installed)
Set of Connectors
Reference
MI -560720 M1-560714-* M1-560719 M1-560721 MI -561323
TECHNICAL SUMMARY
ELECTRICAL
Output* Power Line Requirements
Adjustable to 4 volts peak -peak max. 117/240V±5% 50-60 Hz
MECHANICAL
Height, Inches(cm) Width, Inches(cm) Depth, Inches(cm) Weight, lb.(kg)
Net 3-1/2(8.9) 19(48.3) 10-5/8(27) 17(7.7)
Shipping 5-1/2(14) 20(50.8)
13(33) 22(10)
*For additional technical information, refer to pertinent information in the BTE-15A TECHNICAL SUMMARY in the front of this book.
148
Figure 74. BTX-1B SCA Generator ES -560641
DESCRIPTION
In addition to use in the BTE-15A Exciter system, the BTX-1B SCA Generator is available in a separate housing and with a self-contained power supply, for use in other applications.
A typical application of the separately housed BTX-1 B SCA Generator would be to add SCA operation to either a monophonic or stereophonic FM transmitter. FM transmitters using "Direct FM" modulation are best suited to this type of operation. For example, any transmitter utilizing the RCA BTE-10C FM Exciter is suitable for operation with the separately housed BTX-1B SCA Generator.
When the BTX-1B SCA Generator is used with FM exciters other than the BTE-15A, it will usually be
necessary to make adjustments for the desired SCA injection and SCA modulation levels. For technical information concerning adjustment of the OUT control, R546, for the correct amount of injection, and for correct adjustment of the MOD control, R506, for the correct modulation level, refer to steps 4,5, and 6 of the BTX-1B SCA Generator adjustment procedure on page 20.
Operation and maintenance of the separately housed BTX-1B SCA Generator is similar to that for the 13TX-1B when part of the BTE-15A FM Exciter system. Refer to the appropriate section in this instruction book for detailed information. The separately housed SCA generator main frame schematic diagram and the main frame wiring diagram are shown in Figures 76 and 77, respectively. Power supply board parts location information is presented in Figure 49.
'49
Fiewle-111TX .111 MI -6110720
Sc.!
C.2 41C1.00
OUT T.L.E.Ittilv OUT
Figure 75. BTX-1B SCA Generator, Rear View
150
Symbol
Stock No.
REPLACEMENT PARTS
Drawing No.
Description
FR01 Jaol j824
J808 JAW, XF801
427383 223973
21151:: 21151') 245138
48894
cilot
C892 C803 0804 cpAol
CR807 CR803 LR01 LR02 P901 Q801 Rgn2
SUol 7801 X0801
432444 432444 432444 248371 23455? 23455? 245128 245132 245132 248266
2113054
522122 225745 423018 248361
921351 211509
BTX-1B MAIN FRAME ASSEMBLY MI -560720
FUSE 1/4 AHP Sl.[] a111 CONNECTOR - ANC CONNECTOR - AUDIO CONNECTOR - AUDIO CoNNEcTOR FUSE POST MOLDER
BTX-1B POWER SUPPLY ASSEMBLY
.01 OF 600V .01 OF 600/ .1)1 OF 600V 1500 ';1F OIODE - TYPE 1002 UIUDE - TYPE 1002 DIODE - TYPE IZE16T10 ZEHER RF CHOKE RF CHOKE CONNECTOR TRANSISTOR - TYPE 2N3o54 220 flri 10% 2W CrIMP SWITCH, TOGGLE SPST TRANSFORMER SOCKET, TRANSISTOR
SET OF CONNECTORS MI -561323
CONNECTOR, BNC UG 88C/u (CONNECTS TO J801, J804 AND J8O5) CONNECTOR, AUDIO (CONNECTS TO J802 AND J803)
SUGGESTED EQUIPMENT SPARES
Description
Capacitor, Electrolytic - 1500 MF Fuse, 1/4 Amp Slo-Blo One each of all integrated circuits,
transistors and diodes (1ZC1610, 10D2 and 2143064)
BTX-1B MAIN FRAME
Symbol
C804 F801 MI -560744
Quantity
1 5 1
Stock No.
423020 300124 R0396
*For the SCA Generator spares, refer to the BTE-15A Suggested Equipment Spares.
1801
3-1033
BLK RED
RED/YE
[ RED
OWER SUPPLY BD. 51A5129
L802 2.4uH
R802 22052 2W
C R803
1ZC16T10
P801
J806
F801
.25A S.B.
GND
m
117VAC
NOTES: 1. CAPACITOR VALUES ARE IN UF.
POWER SUPPLY
SLIDE
151 / 15.2
TM.
limmM11110 ..=1=11 .11NIMEND
1171,
SC A2
SCA GENERATOR SLIDE MI -560714
Q801 I I
2N3054
C803
x.01
C804 +
1500
I
OR SCA BLANK PANEL MI -560715
I/
I
50
P501
+15 J808
0 BRACKET
TIE POINTS
SCA1
SCA GENERATOR SLIDE MI -560714
SCHEMATIC 9106263
I
P501
J807
TELEMETRY J801
J802
J803
/77 ,4-A1KUHDz IO6I7 KHzi SC A2
OUT
J805
3732379
/77
SCA1
OUT
Figure 76. BTX-1B SCA Generator Main Frame, Schematic Diagram
153/154
5A1458
(3) AM PH . 17-10250
FUSE FUSE
3 18 19
117V 117V
W
W
10 24
BLK BLK
=1111111111==.
BLK W
BLK RED W
J806
WH T
GRN
J806
PINS 24,27-
I
J806 PINS 18,19
SMITH 939 CAMBION 3650-2
LK/WH T
FUSE F801 XF801
.25 AS. B.
BUS HKP
I
J804
TERMINALS
J802-1
BLK 2 GRN 3
TERM
J803-2
TERM
1
TERM
J803-1 RED REC
r r rJ802-2
GRN
3LK
GRN
2 V_
iv_
J805
J807-10 J807-3 J807-4
581466
J803-2
TERM
J803-1
TERM 1
TERM 3
J802-2
J802-1
I
-\ A
BL K eRr. RE R OR YEL YEL
WW
=I=
=NM
0 0 C) C) C) C) C)
J808-10
2 3 4 10 24 12 25 13)
RED
J807
NOTES.
1. WIRE -#22 COAXIAL CABLE RG-174/U
2. ASSOCIATED DWGS: EXPLODED VIEW 21C2153 SCHEMATIC 9166296 PWR SUPPLY SLIDE ASSY 21C2265 SCA SLIDE ASSY 21C2144
TELEMETRY
J808-3 J808-4
BL K
tBLK GRNREDOR OR YEL YEL
WW
0 0 0 0 0 0 0 WNW =Ma MON= =MD
011.E.
2 3 4 10 24 12 25 13
J808
jr- J808-1
t
I GRN
I TO
-I ERM 3
J807-1
.11=111
AUF
OUTPUT
TELEMETRY
AUDIO
OUTPUT
SCA1 OUT
ORJ80¶5 Ttl
J801
I
YEL
SC A2 OUT J 804
OR
OR ,'W
YEL/W
J807-12 J807-12 J807-24 J808-24 J807-13 J808-13 J807-25
J808-25
AUDIO
INPUTS
00
J803
3732377
Figure 77. BTX-1B SCA Generator Main Frame, Wiring Diagram
Symbol
1XV101 1xv102 1XV102-46
1XV102-03 1XV102-04 1XV102-05 1XV102-15 1Xv102-15 1xv102-15 1XV102-15
1XV102-15 1Xv102-15 1XV102-15 1XV102-15
1XV102-49
1XV102-45 1XV102-48 1XV102-47 1XV102-09 1XV102-10 1xv102-11 1XV102-16 lXv102-39 1XV102-41
Stock No.
243469 236438 225091
220958 220959 220960 225081 725091 225081 225081
2250"
225081 225081 225081
232298
236512
232301 232302 225106 225087 233405 097459 217719 208115
Drawing No.
464586 005 3471557 802 8465194 901
644382 n04 644382 005 644382 006 8446964 002 8446964 002 8446964 n02 8446964 002
8446964 002 8446964 n02 8446964 002 8446964 n02
3462635 501
3467564-501 3462634 001 3462634 002
8519978 001 8863044 007 8519977 004
426763 003 426763 009 426765 n09
67
Description
SOCKET - 7203/4CX2508
SOCKET ASSEMBLY - TUBE, 4CX15000A CONTACT ASSEMBLY - SCREEN. GRID CCLIET,
2 REOUIED PER SOCKET CONTACT - CONTROL GRID CONTACT - OUTER FILAMENT CONTACT - INNER FILAMENT CAPACIToR - SILVER MICA, C117A CAPACIToR - SILVER MICA. C1178 C117 -DESIGNED CAPACIToR - SILvER MICA. C117C IN 4 SEGMENTS CAPACITOR - SILVER MICA. C1170
CAPACITOP - SILVER MICA. C145A CAPACITOR - SILVER MICA. C1458 CAPACITOR - SILVER MICA. C145C CAPACITOR - SILVER MICA. C145D
C145 -DESIGNED IN 4 SEGMENTS
CONTACT ASSEMBLY - PART OF 1L113 SLIDING ADJUSTMENT
BASE ASSEMBLY, SCREEN GRID COLLET SPACER PT OF 1L113 SEMI -FIXED ADJUSTMENT SPACER PT OF 1L113 SEMI -FIXED ADJUSTMENT
RING - INSULATOR WASHER - TEFLON BUSHING INSULATOR - POST, 1/2 IN DIA X .655 IN LG INSULATOR - NS5w4001, BOTTOM OF SOCKET
INSULATOR - NS5w4n03, TOP OF SOCKET INSULATO - vS5w0106
MECHANICAL PARTS
11
230429
8
243458
10
243459
9
243473
22
n99933
161
243460
29
230433
28
230432
156
243471
155
243462
157
243461
158
243463
39
230424
167
243472
42
230435
159
211081
160
231640
54
733872
55
233869
57
233871
58
233870
59
230430
60
230431
63
233834
68
233835
8761072 001 8486379 001
8486379 003
8494379 001
464586 003 3467932 001 8766808 n02 8766808 nol 3464209 503 3456357 n01 3730738 001 3456428 001
8468301 801 69273 183
8766821 501 426767 018
426767 ni5
480368 n07 8886047 003
480368 008 480369 010 8761074 801 8761074 502 433422 806 748586 012
P/L 8541907-504 REV 14
SHELF - UPPER, FOR C113 SUPPORT - PLASTIC. MOUNTS. STOCK NO 230429,
RIGHT SIDE SUPPORT - PLASTIC. MOUNTS. STOCK NO 230429.
REAR SUPPORT - PLASTIC. MOUNTS. STOCK NO 230429.
LEFT SIDE CHIMNEY - FOR 1xV101 SHORTING - RAIL, PART OF 1L105 PLATE . RACKING, PART OF 11.105 PLATE - BACKING, PART OF 11_106 LEAD SCRE,4 ASSY - PART OF 1L1n5 OR 1L106 GUIDE - STRIP. PART OF 1L105 nR 1L106 RING - SPACER, USED UNDER IC113
BLOCK - SPACER, USED AT BOTTOM OF OUTPUT
LINE ASSEMBLY CONTACT ASSEMBLY - FOR 1L105 AND 1006 BRASS STUD - 1/4-20 X 2.75 LG. pART OF
1008 AND 1L106 OUTPUT LI,E ASSEMBLY
INSULATOR - 2 REDD, 3/4 DIA X 3.00 IN LG PART OF 19106 HARMONIC SUPRFSSOR INSULATOR - STEAT., 3/4 IN DIA X 2.50 LG PART OF iRi07 HARMONIC SUPRESSOR STUD - FASTENER, DOOR LIPPFR WASHER - .DETAINING, DOOR STUD STUD - FASTENER. DOOR MIDDLE STUD - FASTENER, DOOR BOTTOM CONTACT ASSEMBLY - DOOR. 15.75 LONG CONTACT ASSEMBLY - DOOR, 17.00 LONG DIAL - ASSEMBLY DRIvE --RIGHT AIME
68
Symbol
69
4 7 8
10 117
70 11
7 8
10 72
75 76 79 80 86 87 107
108
38
33 32 52 136
1011
101 101 102
102
102
1L112 101
101 101 103
103
103
Stock No.
220304 097461 212531
922202 235298
2.20303 097461
212531
922202 922202
735436 208711 211370 211423 230425 230428 226714 215854 243464 243890
243903 243904 243889 243899
'
243892 243891 243893
743894
243896
243892 243891
243895
243896
134
243897
133
243898
134
243897
133
243898
160
231640
173
249529
1C7 1C10 1L3 1M4 1R24
220328 810004-4 229894 229895 229896
Drawing No.
8494371 501. 8986503 002 8827138 002 8914895 s01
8513284 rot 748586 n13
8494371 502 8986503 001 8827138 002 8914895 501
8513284 nol 8513284 001
1510920 017 8898610 00]
426772 003 426765 n03 8491388 503 8544458 001 3450782 003 8413444 501 8544435 507 8489378 501
8494375 002 8494375 001 8543110 001 3475614 001
3455763 n01 3455763 002 3455135 001
3455764 001
3462864 001
3455763 001 3455763 002
3455764 002
3462864 001
3455147 001 3455156 001
3455147 001 3455156 001
426767 n15
3721194 009
Description
COUNTER ASSEMBLY COUNTER GEAR - MITER GEAR ASSEMBLY - INCLUDES MITER GEAR AND BRASS Bu SHING JOINT - uNIVERSAL
DRIVE - RIGHT ANGLE. DRIVES iLlos, 1L106
COUNTER ASSEMBLY
COUNTER
GEAR - mITER
GEAR ASSEMBLY - INCLUDES MITER GEAR AND
BRASS RUSHING
JOINT - UNIVERSAL
JOINT - UNIVERSAL. ATTACHES TO RIGHT kNGLE
DRIVE FOR 1L105 AND 1L106
KNOB . PA PLATE TUNING CR PA OUTPUT Lr.ADING
COUPLING - INSULATED, FLEXIBLE
INSULATOR - STEAT, 1/2 IN SO X .75 IN LG INSULATOR - STEAT. 3/B IN DIA X .50 fk LG CABLE ASSEMBLY (Connects 1XV102 to 1C115 and 1C116 -
RETAINER
2 required)
CONTACT - FINGERS. nOOR
CONTACT - ASSEMBLY, DOOR 4.88 INCHES 100
JUMPER CABLE ASSY JUMPERS DOOR HINGES
PLATE - CONTACT FINGER MOUNTING, FOR 1L105
AND 1L106
BLOCK - SPACER, FOR TOP OF 1L105
BLOCK -.SPACER. FOR TOP OF 1006
DOOR . HINGE, FOR RF BOX
CONE . AIR GUIDE, FOR lXv102
INDUCTOR - VARIABLE, FRONT
SHORTING BLOCK, 880 MH7 TO 105.9 MHZ
SHORTING BLOCK. 1116.1 MHZ TO 107.9 MHZ
PLATE - GRID TUNING INDUCTOR,
88.1 MH7 TO 89.9 MH7
PLATE - OHIO TUNING INDUCTOR,
93.1 MH7 TO 105.9 MHZ
°LATE - GRID TUNING INDUCTOR,
106.1 MHZ TO 107.9 MHZ
INDUCTOR - VARIABfE, REAR
NOT USED - SHORTING BLOCK. 88.1 MHZ TO 89.9 MHZ
SHORTING BLOCK. 90.1 MH7 TO 105.9 MHZ
SHORTING BLOCK. 106.1 MHZ TO 10/.9 MHZ
NOT USED - PLATE - GRID TUNING INDUCTOR,
88.1 MHZ TO 89.9 MHZ
PLATE - GRID TUNING INDUCTOR,
00,1 MH7 TO 105.9 MHZ
PLATE - GRID TUNING INDUCTOR,
1.05.1 MHZ TO 107.9 MHZ
HARMONIC suP9ESSo9. INCLUDES 19105
TUBING - 2 REQUIRED, 1 1/8 nIA x 8 3/8 LG CLAMP - 1 RFOUIQED
RESISTOR - 14106, SEE ELECTRICAL PARTS
HARAONIC StJPRESSOR, INCLUDES 1R107
TUBING - 2 REQUIRED. 1 1/8 DIA x 8 3/8 LG CLAMP - 7 REQUIRED
INSULATOR _ 2 REOD, 3/4 DIA X 2.50 IN LG
RESISTOR - 1R107, SEE ELECTRICAL PARTS SCREW, PH - .090 (10) - 32 x .75 LONG, PPD
POWER DETERMINING COMPONENTS MI -560508
990194 n51 36091 523
8494093 001 993052 153 8491308 n03
PAPER, HIGH VOLTAGE FILTER 3 MF 10% 7500 V MICA, METER RYPASS, .010 HF 2n% REACTOR - HIGH VOLTAGE FILTER AMMETER - PLATE RELAY SHUNT
-1601 CE
time." any at notice without change to subject are and present the at prevailing those are bulletin this in mentioned be may which prices Any otherwise. or models, production new for equipment existing exchange to modifications, of cost the for pay to parts, supply to responsibility or obligation no assumes RCA information, this furnishing By equipment. such of modifications possible or alignment maintenance, the in aid to equipment RCA of users to service free a as furnished is bulletin this in contained information "The
transformer. -voltage constant "Sola" the is closely maintained is frequency line the where unit satisfactory such One voltage. filament of fluctuations
these control to available units satisfactory of number a are There value. optimum the at voltage filament the maintaining prevent may variations
voltage line The lines. rural long of end the at or buildings tall of top the at experienced be may as such fluctuations voltage line are there where
true particularly is This voltage. filament the regulate to transformer voltage constant a using by realized be may life tube in increase further A
voltmeter. accurate an require not does voltage filament the adjusting of procedure this Following power. full near or at operated is 4CX10,000D
the where true particularly is This obtained. are hours of thousands extra several voltage, filament the of adjustment careful and regular by point that at maintained carefully very is and installed first is tube new the when power, the limit not does that value lowest the to adjusted is voltage filament the when that us to reported have stations many However,
used. be will accuracy sufficient of voltmeter a that assumed is it Naturally 4CX15,000A. the for volts 6.0 suggests list The tubes. 4CX10,000D
and 4CX5000A the for volts 7.2 be voltage filament the service" cation communi- and broadcast in life "extended for that suggests newsletter The
volts. 6.3 is voltage filament 4CX15,000A normal The volts. 0.225 only of increase an is
3% this 4CX10,000D, and 4CX5000A the for volts 7.5 normal the at that Note
loss". carbon to due life in decrease 50% a and emission, peak in increase 20% a temperature, in increase 20°K a in result will voltage filament in increase 3% a that estimated is it "Theoretically
states Newsletter Engineering Eimac An life. tube limited in 'resulting filament the of deterioration rapid causes voltage filament .Excessive
life. tube increased greatly in result can transmitters broadcast FM RCA in used tubes 4CX15,000A/8281 and 4CX10,000D/8171 4CX5000A/8170, the of voltage filament the to attention Proper
TRANSMITTERS FM IN LIFE TUBE EXTENDING
2 of 1 Page 1972 4, February
IB-8027529 -364-1 TB
BTF-5+5E1
Division Systems Electronic Commercial RCA by supplied equipment on notes modification and Maintenance
Bulletin Technical RCA
RCA Technical Bulletin Maintenance and modification notes on equipment supplied by RCA Commercial Electronic Systems Division
BTF-5+5E1
TB -364-1
IB-8027529
February 4, 1972 Page 1 of 2
EXTENDING TUBE LIFE IN FM TRANSMITTERS
Proper attention to the filament voltage of the 4CX5000A/8170, 4CX10,000D/8171 and 4CX15,000A/8281 tubes used in RCA FM broadcast transmitters can result in greatly increased tube life.
.Excessive filament voltage causes rapid deterioration of the filament resulting in limited tube life. An Eimac Engineering Newsletter states "Theoretically it is estimated that a 3% increase in filament voltage will result in a 20°K increase in temperature, a 20% increase in peak emission, and a 50% decrease in life due to carbon loss".
Note that at the normal 7.5 volts for the 4CX5000A and 4CX10,000D, this 3% is an increase of only 0.225 volts. The normal 4CX15,000A filament voltage is 6.3 volts.
The newsletter suggests that for "extended life in broadcast and communication service" the filament voltage be 7.2 volts for the 4CX5000A and 4CX10,000D tubes. The list suggests 6.0 volts for the 4CX15,000A. Naturally it is assumed that a voltmeter of sufficient accuracy will be used.
However, many stations have reported to us that when the filament voltage is adjusted to the lowest value that does not limit the power, when the new tube is first installed and is very carefully maintained at that point by regular and careful adjustment of the filament voltage, several extra thousands of hours are obtained. This is particularly true where the 4CX10,000D is operated at or near full power. Following this procedure of adjusting the filament voltage does not require an accurate voltmeter.
A further increase in tube life may be realized by using a constant voltage transformer to regulate the filament voltage. This is particularly true where there are line voltage fluctuations such as may be experienced at the top of tall buildings or at the end of long rural lines. The line voltage variations may prevent maintaining the filament voltage at the optimum value. There are a number of satisfactory units available to control these fluctuations of filament voltage. One such satisfactory unit where the line frequency is maintained closely is the "Sofa" constant -voltage transformer.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipmentfor new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time. -
U -1607
Tail(s)r,
Printed in U.S.A.
TB -364-1
Page 2 of 2
Further, the Sola types listed have sufficient capacity to also handle the bias supply in the present RCA transmitter. The following chart lists the various types for 50 and 60 Hertz.
Tube Type
60 Hz Type
50 Hz Type
4CX5000A or 4CX10,000D
23-25-210
23-25-710
4CX15,000A
23-25-215
23-25-720
Connection instructions are available for using the Sola type constant voltage transformers indicated. Please write to:
Mr. A. S. Jarratt RCA Building 2-2 Camden, NJ 08102 U.S.A.
A. S. Jarratt
RCA Technical Bulletin Maintenance and modification notes on equipment supplied by RCA Commercial Electronic Systems Division
BTF-5+5E1
TB -364-1 IB-8027529
February 4, 1972 Page 1 of 2
EXTENDING TUBE LIFE IN FM TRANSMITTERS
Proper attention to the filament voltage of the 4CX5000A/8170, 4CX10,000D/8171 and 4CX15,000A/8281 tubes used in RCA FM broadcast transmitters can result in greatly increased tube life.
Excessive filament voltage causes rapid deterioration of the filament resulting in limited tube life. An Eimac Engineering Newsletter states
'
"Theoretically it is estimated that a 3% increase in filament voltage will result in a 20°K increase in temperature, a 20% increase in peak emission, and a 50% decrease in life due to carbon loss".
Note that at the normal 7.5 volts for the 4CX5000A and 4CX10,000D, this 3% is an increase of only 0.225 volts. The normal 4CX15,000A filament voltage is 6.3 volts.
The newsletter suggests that for "extended life in broadcast and communication service" the filament voltage be 7.2 volts for the 4CX5000A and 4CX10,000D tubes. The list suggests 6.0 volts for the 4CX15,000A. Naturally it is assumed that a voltmeter of sufficient accuracy will be used.
However, many stations have reported to us that when the filament voltage is adjusted to the lowest value that does not limit the power, when the new tube is first installed and is very carefully maintained at that point by regular and careful adjustment of the filament voltage, several extra thousands of hours are obtained. This is particularly true where the 4CX10,000D is operated at or near full power. Following this procedure of adjusting the filament voltage does not require an accurate voltmeter.
A further increase in tube life may be realized by using a constant voltage transformer to regulate the filament voltage. This is particularly true where there are line voltage fluctuations such as may be experienced at the top of tall buildings or at the end of long rural lines. The line voltage variations may prevent maintaining the filament voltage at the optimum value. There are a number of satisfactory units available to control these fluctuations of filament voltage. One such satisfactory unit where the line frequency is maintained closely is the "Sola" constant -voltage transformer.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
U-1607
Tmk(sK,
Primed in U.S.A.
TB -364-1
Page 2 of 2
Further, the Sofa types listed have sufficient capacity to also handle the bias supply in the present RCA transmitter. The following chart lists the various types for 50 and 60 Hertz.
Tube Type
60 Hz Type
50 Hz Type
4CX5000A or 4CX10,000D
23-25-210
23-25-710
4CX15,000A
23-25-215
23-25-720
Connection instructions are available for using the Sofa type constant voltage transformers indicated. Please write to:
Mr. A. S. Jarratt RCA Building 2-2 Camden, NJ 08102 U.S.A.
A. S. Jarratt
RCA Technical Bulletin
Maintenance and modification notes on equipment supplied by RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5+5E1
TB -364-2
IB-8027529
Page 1 of 3 February 6, 1974
P.A. OUTPUT LOADING ADJUSTMENT - 1L106
The output loading of the "E" line FM transmitter is by means of a coaxial tuning line assembly and shorting bar assembly with finger stock contact making the mechanically active portion of the tuning of the P.A. output loading (1L106 - Figure 17 of IB for BTF-5E1).
The finger stock should be mechanically under slight compression all along the tuning line, and the whole assembly including the inner conductor of RF output feed line should be mechanically stable with essentially no movement in the component parts.
The spacing of the tuning line should be held to 2.00 inches where measuring from the outside of the backing plate (mechanical part 28) to the inside of the complementary plate that is part of the output line assembly (part 42), as in Figure 1 attached. This dimension should be held to a close tolerance of 1/32 of an inch preferably, or no greater than 1/16 of an inch the entire length of the tuning assembly.
Should the tolerance of these lines be out, and if the shorting assembly finger stock is not under slight compression along the entire range of tuning, then several things must be done.
Disconnect the inner conductor of the coaxial output feed line from the plate blocker (1C113) and rotate the inner conductor until the lower insulating post of the inner conductor is perpendicular to the tuning line plate or until it is mechanically secure. Reconnect the inner conductor and remeasure the spacing of the strip lines. If the tolerance of the strip tuning lines is not improved or if the finger stock is not under slight compression along the whole length of the line, then you may want to replace the coaxial assembly or the inner conductor assembly.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to changewithout notice at any time."
CE -1607 12/73
Printed in U.S.A.
TB -364-2
-2-
2/6/74
The output line assembly is ordered from RCA Parts and Accessories under Stock No. 230435, and the inner conductor can be ordered separately under Stock No. 429559. This latter part has been recently added to the materials available from P&A. Please mark your instruction book accordingly.
W. W. Warren FM Transmitter Product Management
att (1)
1L10 6
TOP OF 1?/4" l/N/T
OUTER CONDUCTOR
INsNroEcRn CNoON.D4Z2ic9750'5/59
INNER
CONDL/C701?
A101/4/77/Y6 SCREW
1C126
_ _
7UBe-- PLATE
2.00 -0- MAX, VRR/4770A/ 21%6
71/13,e SPEC F
FIG_ I
FRONT WEW
OF RF COMPA IfT/VeN 7
RCA Technical Bulletin Maintenance and modification notes on equipment supplied by, RCA Commercial Electronic Systems Division
BTF-5E1
TB -339-3
IB-8027529
February 4, 1972 Page 1 of 2
EXTENDING TUBE LIFE IN FM TRANSMITTERS
Proper attention to the filament voltage of the 4CX5000A/8170, 4CX10,000D/8171 and 4CX15,000A/8281 tubes used in RCA FM broadcast transmitters can result in greatly increased tube life.
Excessive filament voltage causes rapid deterioration of the filament resulting in limited tube life. An Eimac Engineering Newsletter states "Theoretically it is estimated that a 3% increase in filament voltage will result in a 20°K increase in temperature, a 20% increase in peak emission, and a 50% decrease in life due to carbon loss:
Note that at the normal 7.5 volts for the 4CX5000A and 4CX10,000D, this 3% is an increase of only 0.225 volts. The normal 4CX15,000A filament voltage is 6.3 volts.
The newsletter suggests that for "extended life in broadcast and communication service" the filament voltage be 7.2 volts for the 4CX5000A and 4CX10,000D tubes. The list suggests 6.0 volts for the 4CX15,000A. Naturally it is assumed that a voltmeter of sufficient accuracy will be used.
However, many stations have reported to us that when the filament voltage is adjusted to the lowest value that does not limit the power, when the new tube is first installed and is very carefully maintained at that point by regular and careful adjustment of the filament voltage, several extra thousands of hours are obtained. This is particularly true where the 4CX10,000D is operated at or near full power. Following this procedure of adjusting the filament voltage does not require an accurate voltmeter.
A further increase in tube life may be realized by using a constant voltage transformer to regulate the filament voltage. This is particularly true where there are line voltage fluctuations such as may be experienced at the top of tall buildings or at the end of long rural lines. The line voltage variations may prevent maintaining the filament voltage at the optimum value. There are a number of satisfactory units available to control these fluctuations of filament voltage. One such satisfactory unit where the line frequency is maintained closely is the "Sola" constant -voltage transformer.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipmentfor new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607
Tmk(s)®
Printed in U.S.A.
TB -339-3
Page 2 of 2
Further, the Sola types listed have sufficient capacity to also handle the bias supply in the present RCA transmitter. The following chart lists the various types for 50 and 60 Hertz.
Tube Type
60 Hz Type
50 Hz Type
4CX5000A or 4CX10,000D
23-25-210
23-25-710
4CX15,000A
23-25-215
23-25-720
Connection instructions are available for using the Sola type constant voltage transformers indicated. Please write to:
Mr. A. S. Jarratt RCA Building 2-2 Camden, NJ 08102 U.S.A.
A. S. Jarratt
RCA Technical Bulletin
Maintenance and modification notes on equipment supplied by RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1
TB -33 9-4
IB-8027529
Page 1 of 3 February 6, 1974
P.A. OUTPUT LOADING ADJUSTMENT - 1L106
The output loading of the "E" line FM transmitter is by means of a coaxial tuning line assembly and shorting bar assembly with finger stock contact making the mechanically active portion of the tuning of the P.A. output loading (1L106 - Figure 17 of IB for BTF-5E1).
The finger stock should be mechanically under slight compression all along the tuning line, and the whole assembly including the inner conductor of RF output feed line should be mechanically stable with essentially no movement in the component parts.
The spacing of the tuning line should be held to 2.00 inches where measuring from the outside of the backing plate (mechanical part 28) to the inside of the complementary plate that is part of the output line assembly (part 42), as in Figure 1 attached. This dimension should be held to a close tolerance of 1/32 of an inch preferably, or no greater than 1/16 of an inch the entire length of the tuning assembly.
Should the tolerance of these lines be out, and if the shorting assembly finger stock is not under slight compression along the entire range of tuning, then several things must be done.
Disconnect the inner conductor of the coaxial output feed line from the plate blocker (1C113) and rotate the inner conductor until the lower insulating post of the inner conductor is perpendicular to the tuning line plate or until it is mechanically secure. Reconnect the inner conductor and remeasure the spacing of the strip lines. If the tolerance of the strip tuning lines is not improved or if the finger stock is not under slight compression along the whole length of the line, then you may want to replace the coaxial assembly or the inner conductor
assembly.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 12/73
Printed in U.S.A.
TB -339-4
-2-
2/6/74
The output line assembly is ordered from RCA Parts and Accessories under Stock No. 230435, and the inner conductor can be ordered separately under Stock No. 429559. This latter part has been recently added to the materials available from P&A. Please mark your instruction book accordingly.
W. W. Warren FM Transmitter Product Management
att (1)
r
TOP OF A? f UN/T
I L106
OUTER CONDUCTOR
INsNroEcRxCNOON.D4U2C9T5O'5/49
INNER
CONDUCTOR /FOUNT//?6
SCREW
TUBE I'LATE TUBE SHELF
Le- 2.00 MAX, Vicift/4770/V 21%6
FIG_ I
FRONT WEW
OF /?F COMPARTMENT
RC/1 Technical Bulletin
Maintenance and modification notes on equipment supplied by RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1
TB -339-5
IB-8027529
LOOSE HARDWARE ON PRIMARY TERMINALS OF HIGH VOLTAGE POWER TRANSFORMER
Reference: Transformers MI -34507, MI -561022
Page 1 of 2 July 8, 1974
Recent factory tests of the high voltage power transformers used with the BTF-20E1 and BTF-40E1 have conclusively proven that if the hardware (nuts, links, flat washers, and lock washers) is not tight, the temperature rise at the terminals of the primary input connection becomes excessive.
In summation, it is our conclusion that all hardware on the primary side of the high voltage transformer must be tightened and regularly inspected to assure that they have not been loosened by the normal expansion and contraction cycle of on and off operation of the transmitter.
Inasmuch as the loosening effect of the hardware has been found to exist in the BTF-20E1 and BTF-40E1 Transmitters, we are also advising owners of the BTF-5E1 and BTF-10E1 Transmitters of this condition. The terminal hardware on the high voltage transformer for these latter two transmitters should also be inspected for tightness to be assured of trouble -free operation.
A proper procedure for tightening the series of three nuts without breaking the primary terminal board is to use two wrenches against each other. To rely on tightening the nuts against the terminal board using only one wrench results in eventual loosening of the bolts.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 12/73
Printed iral.S.A.
TB -339-5
-2-
July 8, 1974
We urge each station to immediately inspect their high voltage transformer primary connections since abnormal temperature rise at the connections can cause serious charring of the terminal board and damage the transformer itself.
Failure to observe the condition of the tightness of the primary connection to these transformers could affect the warranty replacement of these transformers.
w. W. Warren FM Transmitter Product Management Building 2-7 Camden, NJ 08102
RCA Technical Bulletin
Maintenance and modification notes on equipment supplied by
RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1
TB -339-6
IB-8027529
Page 1 of 2 February 10, 1975
GROUNDING SWITCHES (1S19 and 1S20) USED IN BASIC TRANSMITTER MI -560507A
As a precautionary warning it is suggested that all owners of the BTF-5E1 using the MI -560507A Basic Transmitter unit immediately inspect the grounding switches 1519 and 1520 mounted on the transmitter frame behind the rear doors and in the middle of the door opening on the bracket beside the door interlock pushbutton switch.
Occasionally a malfunction is experienced with the plunger which is part of the grounding switch and which acts against the contact spring to open or close the grounding contacts. The malfunction is in the form of a "hang-up" of the plunger which then does not allow the grounding switch to operate when either back door is opened.
This condition can be highly dangerous to the safety of station personnel during maintenance and other occasions when the basic transmitter rear doors are opened, and high voltages are exposed.
During regular maintenance checks, it is recommended that these grounding switches be manually operated several times on a regular basis. They should be removed and cleaned also on a regular basis so that foreign matter will not accumulate in the plunger hole and bind the plunger mechanism. Do not attempt to lubricate with any lubricant or graphite powder since the lubrication or powder tends to attract foreign matter and thus invite the possibility of a malfunction of the switch.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 12/73
Printed in U.S.A.
TB- 339-6
-2-
February 10, 1975
It is further suggested that a notation be placed in the transmitter instruction book (listed above) to the effect that the grounding switches should be operated several times when the transmitters rear doors are open, and that regular inspection and cleaning be undertaken to assure proper operation. If the station maintains a "Maintenance Log", it would be wise to have the Maintenance Engineer indicate that the switches were inspected, manually operated, and cleaned during each major maintenance period.
W. W. Warren FM Transmitter Product Management Building 2-7 Camden, NJ 08102
WWW:pw
RC/1 Technical Bulletin
Maintenance and modification notes on equipment supplied by
RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1
TB -339-7
IB-8027529
Page 1 of 2 February 10, 1975
HIGH VOLTAGE GROUNDING SWITCH FOR MI -560342-6 POWER SUPPLY UNIT
It has come to our attention that the High Voltage Grounding Switch (2S4) installed in the MI -560342-6 Power Supply for the BTF-5E1 transmitter can be made to fail by allowing the shorting bar to drop clear of its ground contact. Should the mechanism become loose, the shorting bar will not function properly when the top lid of the power supply cabinet is lifted. This condition can be highly dangerous to the safety of station personnel during maintenance and other occasions when the pwer supply unit is opened.
Within 30 days a new High Voltage Grounding Switch Kit (2S4) will be sent to all stations using the MI -560342-6 Power Supply. This kit is designated MI -561378-3 and will be furnished free of charge for all present installations.
When the MI -561378-3 kit is received, please remove and destroy the present switch and install the new High Voltage Grounding Switch (2S4) immediately, following the instructions supplied with the kit. Do not retain the parts of the old switch assembly or attempt at some future date to reinstall the unit.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 12/73
Printed
TB- 339-7
-2-
February 10, 1975
If in the future you should feel the need to replace any part of the new assembly (MI -561378-3) parts are available from RCA Parts and Accessories, Deptford, NJ under the following stock numbers and drawings:
Symbol
Stock No.
Drawing No.
Description
29
432038
31
432037
32
432036
3724531 168
3720249 005 3454962 502
Spacer -Grounding Switch
Bar -shorting Strap -Flexible
W. W. Warren FM Transmitter Product Management Bldg. 2-7 Camden, NJ 08102
WWW:pw
NOTE: Please make the above information a part of the referenced instruction book.
RC/1 Technical Bulletin Maintenance and modification notes on equipment supplied by RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1
113-339-8
IB-8027529 & IB-8027529-1
August 25, 1975 Page 1 of 4
CLARIFICATION OF NEUTRALIZATION PROCEDURES
The PA neutralization procedures as described in the tuning section of the above transmitter is intended for use during the initial tune up of the transmitter. The step by step instructions do not provide simple explanation to the reader of a way to re -neutralize or to confirm the neutralization adjustment of an operating transmitter.
The following explanation will clarify the procedures of neutralizing your transmitter and includes alternative methods of disabling the plate voltage to facilitate this procedure.
NOTE: Prior to performing any of the steps described below, carefully examine the condition of the grounding hooks provided with the transmitter. Make sure the cable is intact and that good electrical connections exist at the hook and at the point where the cable is grounded to the transmitter frame.
Hang the hook on the connections of any components or touch the connections firmly with the ground hook before you attempt to remove (or replace) any components or perform any adjustment.
Never presume upon safety.
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipmentfor new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 1.2/74
Pr011ed in U.S.A.
-2 -
NEUTRALIZATION PROCEDURE
1. Connect a dummy load and wattmeter (0 to 15 watt, 50 ohm) to the PA output line, using a reducer cone (MI -27791K -5A) and a short length (6 ft.) of RG-8U cable with appropriate connectors.
2. Remove and carefully lay aside resistors 1R13, 1R14, 1R15, and 1R16 to remove PA screen voltage and to open the PA screen path to ground. Set the multimeter switch 1S2 to some other position than to the PA Eg2 position during the neutralization procedure.
3. Remove and lay aside resistor 1R9 and replace with 1R13 or 1R14 (6300 ohms) previously removed in step 1. Set the Driver Screen Control 1R38 to the center of its range.
4. PA plate voltage can be removed by either of the two methods which follow. The first method is "easier on the transmitter" than the second, but is more time -consuming.
a) Disconnect the primary connections to 3T1 (the high voltage plate transformer). Tape the exposed connectors at the ends of the disconnected wires to prevent short circuits between the wires and from grounding out against the transmitter frame.
OR ALTERNATIVELY
b) Remove and lay aside resistor 1R25. NOTE: If this method is used, the PA plate voltage meter needle will indicate off scale when power is applied. This is not harmful to the meter.
5. Set switch 1S13 to the "disable" position.
6. Depress the transmitter on and plate on pushbuttons. After the plate time delay relay cycles, applying plate voltage, readjust driver plate tuning control 1C112 for minimum driver cathode current. Set multimeter switch 1S2 to the PA lg position. If a grid current indication is noted, adjust both 1C112 and 1C123 for maximum indication. (If no grid current is apparent initially, operate the power raise pushbutton as required to initiate grid current).
-3 -
Using the power raise/power lower pushbuttons, establish a reference value of PA grid current. A reading of 35 milliamperes is a convenient value. This reference value should be held constant during the neutralizing procedure.
7. The small wattmeter connected at the PA output now indicates feed -through power (power coupled from PA grid circuit to PA output circuit through the "feed -through" capacitance of the PA tube).
8. Adjust PA plate tuning control 1L105 and PA output loading control 1L106 for a peak in the wattmeter indication.
9. Remove power from the transmitter. Adjust the front neutralizing slide (part of PA tube socket assembly) 3/8 inch to the right. Reapply power, adjust 1L105 and 1L106, and note the change in the wattmeter reading. If the meter reading has decreased, repeat this procedure until a minimum wattmeter reading is obtained. If the meter reading increased, move the neutralizing slide to the left and repeat. If an appreciable movement is required at the front neutralizing slide, all four slides should be adjusted so that they are approximately balanced. If necessary, one of the s mi-fixed slides may be removed.
Normally, with 35 milliamperes of PA grid current (to establish a reference driving voltage) it should be possible to obtain a feed -through power indication of less than one watt. However, the important consideration in neutralization is to secure a minimum feed -through indication.
Note that the reflectometer meter is not sufficiently sensitive and cannot be used in place of the wattmeter specified in step one.
10. Depress and hold the power lower pushbutton until the driver Eg2 indication is zero, then remove all power.
11. After completion of neutralization of the PA stage, replace resistors 1R9, 1R13, 1R14, 1R15, 1R16, and 1RI7 in their normal mounting positions.
-4-
12. If method 4a was used to remove plate voltage, reconnect the primary leads of high voltage transformer 3T1 (refer to Table 3). Tighten connections securely. OR ALTERNATIVELY If method 4b was used, replace resistor 1R25 (first apply the grounding hook to both resistor clips).
13. Disconnect the dummy load and wattmeter and reconnect the PA output line as before. Tighten the coaxial connectors securely.
This completes the neutralization procedure.
W. W. Warren FM Transmitter Product Management
RBA Technical Bulletin
Maintenance and modification notes on equipment supplied by RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1
TB -339-9
IB-8027529
August 25, 1975 Page 1 of 4
TRANSMITTER COOLING SYSTEMS
This information is supplied to assure optimum performance of cooling systems employed in conjunction with RCA BTF-E line FM Transmitters.
Several recent installations of RCA "-El" line FM Transmitters have experienced an undesirably high temperature rise in the transmitter cabinet.
Upon investigation, it was found that air plenum or duct configurations at these installations were so constructed as to allow hot exhaust air from the RF power amplifier to re-enter the transmitter cabinet through the perforated top cover of the cabinet. The recirculation of heated air through the transmitter power amplifier caused an abnormal build-up of heat in the transmitter cabinet. Components located in the control section of the cabinet were thus subjected to higher than normal temperatures. This is believed to have caused component failure in some instances.
If the air exhaust system of your transmitter is of such a configuration as to allow recirculation of heated exhaust air, as described above, it should be changed to air exhaust method I or II, described below. (A typical example of an undesired exhaust system is one with a large plenum chamber installed to cover the entire transmitter top, with power amplifier exhaust air vented into the plenum and ductwork from plenum to outside air).
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possible modifications of such equip-
ment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to exchange existing equipmentfor new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 12/74
Printed in U.S.A.
-2-
BTF-E LINE AIR EXHAUST SYSTEM
Most of the power dissipation in these transmitters occurs in the power amplifier stages. Heated exhaust air from the power amplifier is ducted to the perforated transmitter top cover by sheet metal air conduit (approximately 13x17 inches in crosssection). This air conduit (from transmitter power amplifier to transmitter top cover) is part of the transmitter cabinet.
It is considered acceptable to vent heated PA exhaust air from the transmitter by one of the two following methods:
Ductwork Used To Vent Transmitter
I) Extend the 13x17 inch power amplifier exhaust air conduit, previously described, through suitable ducting, into an exhaust system which removes the heated air to outside the transmitter room. No part of the added ductwork, other than the vertical run which connects to the 13x17 inch power amplifier duct, should be located less than 18 inches from the transmitter cabinet. The added ductwork should not introduce a back pressure of more than 0.1 inch water pressure. This requirement makes the use of rightangle extensions, or sudden changes in cross-sectional shape in the added ductwork, undesirable. In order to achieve a sufficiently low back pressure, it may be necessary to incorporate a large fan in the added ductwork.
Cooling of the interior of the transmitter cabinet is accomplished by drawing air from the transmitter room through the perforated transmitter top cover above the control section with air flow through the control section (left half of transmitter cabinet, front view), through the large fiberglass air filters, into the blower compartment, and thence up through the power amplifiers.
No Ductwork Used
II) Using a procedure of no ductwork, the heated exhaust air from the transmitter power amplifier is allowed to vent directly into the transmitter room. When this method is used, appropriate action must be taken to maintain the transmitter room air temperature within the prescribed limits of -20°C to +45°C0
-3-
A large transmitter room exhaust fan or sufficient air conditioning will normally be required. Cooling of the interior of the transmitter cabinet is by the same cooling action as in method I previously described. (See Figure 1).
Note that neither method I or II is intended to allow appreciable recirculation of heated exhausted air into the transmitter cooling system. Method I is superior to method II in this regard, and in preferred over method II.
The subject transmitters have been designed for a maximum air temperature in the interior of the transmitter cabinet (excluding power amplifier exhaust air) of 60°C (140°F). The rise in air temperature, in the interior of the transmitter cabinet, is thus limited to a maximum value of 15°C above transmitter room temperature, when the room temperature reaches 45°C (113°F). Recirculation of hot exhaust air from the power amplifier into the control section of the transmitter cabinet will readily cause this 15°C rise to be exceeded.
Under no conditions should hot exhaust air from the power amplifier be allowed to recirculate into the control section of the transmitter cabinet.
AIR EXHAUST KIT MI -563465 (FIGURE 2)
A modification kit is now available from RCA which will afford optimized cooling of the interior of the transmitter cabinet. It is designed to be used with either exhaust method I or II, previously described. It is not designed for use where heated exhaust air recirculation, previously described, is allowed. This modification adds air holes in the sheet metal shield behind the BTE-15A FM Exciter Unit (to allow air flow into the exciter area) and in the sheet metal shield above the exciter unit (to allow air flow out of the exciter area). Also, a non -perforated sheet metal section is installed to cover the left half of the perforated transmitter top cover, blocking air recirculation through the top cover. A ceiling fan (590 CFM rating at low pressure) is added, mounted near the center of the new top cover. Finally, a sheet metal cover is placed over the inside fiberglass air filter.
-4 -
This modification provides a positive air flow through the control section of the transmitter cabinet, from bottom to top, with a lowered temperature rise.
This modification, Air Exhaust Kit MI -563465, is available from RCA Order Service, Bldg. 2-3, Camden, N.J. 08102. Price is (estimated) $495.00 f.o.b. Meadow Lands, PA. One kit is used per transmitter (two for BTF-40E1 or BTF-10+10E1 Transmitters, etc.).
W. W. Warren FM Transmitter Product Management WWW:pw
h1M2IN.
12 MIN, 3I, RECOMMENDED
EXHAUST FAN 5000 CFM NOT SUPPLIED
TO INCOMING POWER
32
SOURCE
POWER SUPPLY
0 23
X
LOCATION OPTIONAL O
-
4 AIR INLET
CFM
(THROUGH DOOR)
24 MIN.
3lo RECOMMENDED
30 TRANSMITTER
133Ig
HARMONIC FILTER
484-1
,1*
AIR EXHAUST
CFM
C FM
INLET-
h -A J ST
137f -2e, eI 700 576-
131f -/.0 E., 575 475
.61-E--57 500 27S
0" uriohstri.t. fed
A i t-
TO ANTENNA
-r-Rpkt \15 NI IT TE R
77
22 LID
POWER
SUPPL(
55
FLOOR
SIDE ELEVATION
THESE DRAWINGS AND SPECWICAT IONS ARE THE PROPERTY Of RCA CORPORATION AND !MAU NOT IN REPRODUCED, OR COPIED, OR USED AS THE ASPS FOR THE MANUFACTURE OF SALE Of APPARATUS OR DEVICES WITHOUT PERMISSION.
OGD CAB/NET' alifriff
VIEW A
P4 A/R
EXI/gt/ST
/8/NCl/ES
MOBSTRUCTED 4'/R FLOW
SEE V/EW .
0z
O
1
BTF 5/10/20(1 REWR_ ,VIEW--
FI6u.E_ 2
A
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_CODE I DENT NO. 496711 SHEET 3 CON T'D ON SN F
Real Technical Bulletin
Maintenance and modification notes on equipment supplied by RCA Communications Systems Division, Camden, New Jersey, 08102
BTF-5E1 TB -339-10 IB-8027529
Page 1 of 1 September 15, 1975
GROUNDING SWITCHES (253 and 254) USED IN POWER SUPPLY CABINET
As a precautionary warning it is suggested that all owners of the BTF-5E1 using the MI -550342-1 Power Supply Cabinet immediately inspect the grounding switches 2.53 and 254 mounted on the power supply frame beneath the top lift cover.
Occasionally a malfunction is experienced with the plunger which is part of the grounding switch and which acts against the contact spring to open or close the grounding contacts. The malfunction is in the form of a "hang-up" of the plunger which then does not allow the grounding switch to operate when either back door is opened.
This condition can be highly dangerous to the safety of station personnel during maintenance and other occasions when the power supply top lift cover is opened, and high voltages are exposed.
During regular maintenance checks, it is recommended that these grounded switches be manually operated several times on a regular basis. They should be removed and cleaned also on a regular basis so that foreign matter will not accumulate in the plunger hole and bind the plunger mechanism. Do not attempt to lubricate with any lubricant or graphite powder since the lubrication or powder tends to attract foreign matter and thus invite the possibility of a malfunction of the switch.
It is further suggested that a notation be placed in the transmitter instruction book (listed above) to the effect that the grounding switches should be operated several times when the power supply top lift cover is open, and that regular inspection and cleaning be undertaken to assure proper operation. If the station maintains a "Maintenance Log", it would be wise to have the Maintenance Engineer indicate that the switches were inspected, manually operated, and cleaned during each major maintenance period.
. Warren FM Transmitter Product Management Building 2-2 Camden, NJ 08102
WWW:pj
"The information contained in this bulletin is furnished as a free service to users of RCA equipment to aid in the maintenance, alignment or possib!e modifications of such equipment. By furnishing this information, RCA assumes no obligation or responsibility to supply parts, to pay for the cost of modifications, to , charge existing equipment for new production models, or otherwise. Any prices which may be mentioned in this bulletin are those prevailing at the present and are subject to change without notice at any time."
CE -1607 12/74
Printed in U.S.A.
Symbol
1xv101 1xv102 1XV102.46
1XV102.03 1XV102.04 1XV102-05 1XV102-15 1XV102.15 1XV102-15 1XV102-15
1XV102-15 1XV102-15 1XV102-15 1XV102-15
1XV102-49
1XV102-45 1XV102-48 1XV102-47 1XV102-09 1XV102-10 lxv102-11 1XV102-16 1XV102-39 1XV102-41
Stock No.
743469 236438 225091
72n958 220959 220960 225081 225081 225081 225081
225081 225081 225081 225081
232298
236512
232301 232302 225106 225087 233495 097459 217719 208115
Drawing No.
464586 005 3471557 502 8465194 501
644382 r04 644382 005 644382 006 8446964 n02 8446964 002 8446964 n02 8446964 002
8446964 002 8446964 002 8446964 002 8446964 002
3462635 501
3467564-501
3462634 001 3462634 002 8519978 001 8863044 007 8519977 004
426763 003 426763 009 426765 n09
67
Description
SOCKET - 7203/4CX750B
SOCKET ASSEMBLY - TUBE, 4CX15000A CONTACT ASSEMBLY - SCREEN. GRID COLLET, 2 REQUIRED PER SOCKET CONTACT - CONTROL GRID CONTACT - OUTER FILAMENT CONTACT - INNER FILAMENT CAPACITOR - SILVER MICA, 0117A CAPACITOR - SILVER MICA, C117B 0117 -DESIGNED CAPACITOR - SILVER MICA, 01170 IN 4 SEGMENTS CAPACITOR - SILVER MICA. 0117D
CAPACITOR - SILVER MICA. C145A CAPACITOR - SILVER MICA, C1458 CAPACITOR - SILVER MICA. C145C CAPACITOR - SILVER MICA. C145D
C145 -DESIGNED IN 4 SEGMENTS
CONTACT ASSEMBLY - PART OF 1013 SLIDING ADJUSTMENT
BASE ASSEMBLY, SCREEN GRID COLLET SPACER PT OF 11413 SEMI -FIXED ADJUSTMENT SPACER PT OF 11_113 SEMI -FIXED ADJUSTMENT RING - INSULATOR WASHER - TEFLON BUSHING INSULATOR - POST, 1/2 IN DIA X .655 IN LG INSULATOR - NS5w4001, BOTTOM OF SOCKET INSULAToR - NS5w4003, TOP OF SOCKET INSULATOR - NS5w0106
MECHANICAL PARTS
11
230429
8
243458
10
243459
9
243473
22
099933
161
243460
29
230433
28
230432
156
243471
155
243462
157
243461
158
243463
39
230424
167
243472
42
230435
159
211011
160
231640
54
233872
55
233869
57
233871
58
233870
59
230430
60
230431
63
233834
68
233835
8761072 001 8486379 001
8486379 003
8494379 001
464586 003 3467932 001 8766808 002 8766808 001 3464209 503 3456357 001 3730738 001 3456428 001
8468301 501 69273 183
876682n 501 426767 011
426767 015
480368 n07 8886047 no3
480368 008 480368 010 8761074 501 8761074 502 433422 506 748586 012
P/L 8541907-504 REV 14
SHELF -.UPPER. FOR C113 SUPPORT - PLASTIC. MOUNTS. STOCK NO 230429,
RIGHT SIDE SUPPORT - PLASTIC. MOUNTS. STOCK NO 230429.
PEAR SUPPORT - PLASTIC, MOUNTS. STOCK NO 730429,
LEFT S. IDE CHIMNEY - FOR 1Xv101 SHORTING - RAIL, PART OF 1005 PLATE . PACKING, PART OF 11.105 PLATE - BACKING, PART OF 1.L106 LEAD SCRE.4 ASSY - PART OF 1005 OR 1L106 GUIDE - STRIP. PART OF 1005 nR 1L106 RING - SPACER, USED UNDER 10113
BLOCK - SPACER, USED AT BOTTOM OF OUTPUT LINE ASSEMBLY
CONTACT ASSEMBLY - FOR 11_105 AND 1L106 BRASS STUD - 1/4-20 X 2.75 LG. pART OF
1005 AND 11_106 OUTPUT LI\,= ASSEMBLY
INSULATOR - 2 READ, 3/4 DIA X 3.00 TN LG PART or 1R106 HARMONIC sUpRpSSOR INSULATOR - STEAT., 3/4 IN DIA X 2.50 LG PART OF 1R107 HARMONIC SUPRESSOR STUD . FASTENER, DQOR UPPER
WASHER - rPTAINING, DOOR STUD STUD - FASTENER, DOOR MIDDLE STUD - FASTENER, DOOR BOTTOM CONTACT ASSEMBLY - DOOR. 15.75 LONG CONTACT ASSEMBLY - DOOR, 37.00 LONG DIAL - ASSEMBLY DRIVE - RIGHT ANGLE
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