Early Electronic Television
Andrea 1-F-5, 2-F-5, KT-E-5 Technical Information
Two channel (50-90 mHz) superhetrodyne (some sets had three channel tuners). 5 inh CRT (5AP4) tetrode. Electrostatic focus and deflection, approx. 30 degrees. |
Function |
Quan. | Type | Notes |
| Oscillator | 1 | 6J5 | |
| Mixer | 1 | 6AC7 | |
| Video IF Amplifier | 2 | 6AC7 | Video (9.5-12.75 mHz), audio (8.25 mHz) |
| Video detector | 1 | 6H6 | |
| Video amplifier | 1 | 6AG7 | Some sets used 6V6 |
| Sync separator | 1 | 6AC7 | |
| Horizontal (line) oscillator | 1 | 6N7 | |
| Horizontal (line) output | 1 | 6F8 | |
| Vertical (frame) oscillator | 1 | 6N7 | |
| Vertical (frame) output | 1 | 6F8 | |
| Audio IF amplifier | 1 | 6AC7 | 8.25 mHz |
| Audio detector/amplifier | 1 | 6SQ7 | |
| Audio Output | 1 | 6V6 | |
| Rectifier (HT) | 1 | 5V4 | |
| High Voltage (EHT) | 1 | 2Y2 | 2500 VDC |
