Early Electronic Television
RCA TT-5, RCA TRK-5, Westinghouse WRT-700 and WRT-701 Technical Information
Television: Five channel (50-90 mHz) superhetrodyne. 5 inch CRT (5BP4) tetrode. Electrostatic focus and deflection, approx. 30 degrees. The TT-5 amd WRT-700 have only low level audio output.
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Radio (TRK-5 and WRT-701 only): Short wave (7.0-22 mHz), medium wave (2.3-7.0 mHz), and standard broadcast (540-1720 kHz) bands.
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| Quan. | Type | ||
| Oscillator | 1 | 6J5 | |
| Mixer | 1 | 6AC7 | |
| Video IF amplifier | 2 | 6AC7 | Video (9.5-12.75 mHz), audio (8.25 mHz) |
| Video IF amplifier | 1 | 6AB7 | |
| Video detector | 1 | 6H6 | |
| Video amplfier | 1 | 6V6 | |
| Sync separator | 1 | 6N7 | |
| Horizontal (line) oscillator | 1 | 6N7 | |
| Horizontal (line) output | 1 | 6F8 | |
| Vertical (frame) oscillator | 1 | 6N7 | |
| Vertical (frame) output | 1 | 6N7 | |
| Audio IF amplifier | 1 | 6AB7 | 8.25 mHz |
| Audio detector/amplifier | 1 | 6B8 | |
| Rectifier (HT) | 1 | 5V4 | |
| High Voltage (EHT) | 879 | 2500 VDC |
Radio Chassis (TRK-5/WRT-701 only)
| Oscillator/mixer (frequency changer) | 1 | 6A8 | |
| IF amplifier | 1 | 6K7 | 455 kHz |
| Detector, AVC, audio amplifier | 1 | 6Q7 | |
| Phase inverter | 1 | 6J5 | |
| Audio output | 1 | 6K6 | |
| Tuning eye | 1 | 6U5 |
Radio Power Supply Chassis (TRK-5/WRT-701 only)
| Rectifier | 1 | 5Y3 |