HMV 1800 Valve List

Mechanical TV
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Early Electronic TV
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Postwar TV
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Early Color TV
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Early Electronic Television

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