General Electric HM-225/226 Technical Information
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Television: Five channel (50-90 mHz) superhetrodyne. HM-225: 9 inch CRT. Electrostatic focus, magnetic deflection, approx. 45 degrees. HM-226: 12 inch CRT. Electrostatic focus, magnetic deflection, approx 50 degrees.
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Function |
Quan. |
Type |
Notes |
| TV Chassis | |||
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Oscillator/Mixer |
1 |
6F8 |
|
|
Video IF amplifier |
2 |
6AB7 |
Video (9.5-12.75 mHz), audio (8.25 mHz) |
| Video IF amplifier | 2 | 6AC7 | |
| Video detector | 1 | 6H6 | |
|
1st video amplifier |
1 |
6F8 |
|
|
Video output |
1 |
6F6 |
|
|
Horizontal (line) oscillator |
1 |
6N7 |
|
|
Horizontal (line) output |
1 |
6AL6 |
|
|
Vertical (frame) oscillator |
1 |
6F8 |
|
|
Vertical (frame) output |
1 |
6V6 |
|
|
Audio IF amplifier |
1 |
6SK7 |
8.25 mHz |
| Audio IF amplifier | 1 | 6B8 | |
| Audio detector, amplifier | 1 | 6SC7 | |
|
Audio Output |
2 |
6V6 |
|
|
Rectifier (HT) |
2 |
5U4 |
|
| High Voltage (EHT) |
1 |
2X2 |
4000 VDC |
| Radio Chassis (HM-226) | |||
| RF ampifier | 1 | 6SA7 | |
| IF amplifier | 1 | 6SK7 | 455 kHz |
| Detector/AVC | 1 | 6H6 | |
| Audio amplifier | 1 | 6SF5 | |
| Audio inverter | 1 | 6J5 | |
| Audio output | 2 | 6Y6 |