Early Electronic Television
Baird T-18C Technical Information
Television: Single channel TRF. 45.0 mHz video, 41.5 mHz audio. 12 inch CRT (Baird MW-3) Cathovisor triode. Magnetic focus and deflection, approx. 50 degrees.
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Radio: Short (15.5-51 meters), Medium (198-550 meters) and Long (850-2000 meters) wave bands. In the television mode it tunes 41.5 mHz TV sound frequency.
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Function |
Quan. |
Type |
Notes |
| RF Chassis | |||
| RF amplifier | 2 | SE4 | TRF - 42 -45 mHz |
| Video detector | 1 | D1 | |
| Video amplifier | 1 | TSE4 | |
Deflection Chassis |
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| Sync amplifier | 1 | AC2/HL | |
| Horizontal (line) Sync Separator | 1 | 2D4A | |
| Horizontal (line) osc/output | 1 |
41MP |
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| Damper | 1 |
UR1C |
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| Vertical (frame) sync separator | 1 |
2D4A |
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| Vertical (frame) osc/output | 1 |
AC/P |
Osc/output transformer also serves as the deflection coil |
Radio/Power Supply Chassis |
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| Osc/mixer (frequency changer) | 1 | TH4B | AM/SW radio, 41.5 mHz TV audio |
| Audio IF amplifier | 1 | VP4B | 456 kHz |
| Audio Detector | 1 | 2D4A | |
| Audio Amp & 41.5 mHz amp | 1 | SP4B | Amplfies 41.5 mHz TV audio and detected audio simultaneously |
| Audio Output | 1 | AC4/PEN | |
| Rectifier (HT) | 1 | UU5 | |
| High Voltage (EHT) | HVR2 | 5000 VDC |