RCA TRK-12 Tube List

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Early Electronic Television

RCA TRK-12 and Westinghouse WRT-703 Tube List

Television: Five channel (50-90 mHz) superhetrodyne. 12 inch CRT (12AP4) tetrode. Magnetic focus and deflection, approx. 40 degrees.

Radio: Short Wave (7-22 mHz), Medium Wave (2.3-7 mHz) and Standard Broadcast (540-1720 kHz) bands.

Function	Quan.	Type	Notes
TV Chassis
Oscillator	1	6J5
Mixer	1	6AC7
Video IF Amplifier	4	6AB7	Video (9.5-12.75 mHz), audio (8.25 mHz)
Video IF Amplifier	1	6AC7
Video detector	1	6H6
Video amplfier	1	6AC7
DC restorer	1	6H6
Sync separator	1	6N7
Sync separator	1	6Y6
AVC	1	6F8
Horizontal (line) oscillator	1	6N7
Horizontal (line) output	1	6L6
Damper	1	5V4
Vertical (frame) oscillator	1	6N7
Vertical (frame) output	1	6J5
Audio IF amplifier	1	6SK7	8.25 mHz
Audio IF amplifier	1	6AB7	8.25 mHz
Audio detector/AVC	1	6H6
Radio Chassis
RF amplifier	1	6K7
Mixer	1	6A8
Oscillator	1	6J7
IF amplifier	2	6K7	455 kHz
Detector/AVC/audio amp	1	6R7
Audio amp	2	6J5
Audio Output	2	6F6
Tuning eye	1	6U5
Radio Power Supply Chassis
Rectifier (HT)	1	5U4
TV Power Supply Chassis
Rectifier (HT)	1	5T4
High Voltage (EHT)	1	2V3	6000 VDC

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