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Early Electronic Television

HMV 1800 Valve List

Single channel superhetrodyne, 9 inch triode CRT. Magnetic focus and deflection, approx. 50 degrees.
Function
Quan.
Type
Notes
    
RF amplifier 1 Z62
Oscillator/mixer (frequency changer) 1 X41
Video IF amplifier 3 KTZ41 3-6 mHz
Video detector 1 D42
Video amplifier    1 KTZ41
Sync separator 1 D63
Sync amplifier 1 KTZ63
Horizontal (line) oscillator 1 KTZ63
Horizontal (line) output 1 KT44
Vertical (frame) oscillator 1
KTZ63
Vertical (frame) output 1 KT61
Audio IF amplifier 1 KTW61M 2.5 mHz
Audio detector/noise limiter 1 D63
Audio amplifier 1 DH63
Audio output 1 KT61
Rectifier (HT) 1 U52
HV (EHT) rectifier 1 U16 3500 VDC

 


 
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