HMV 904/905 Technical Information

Television: Single channel superhetrodyne. 45.0 mHz video, 41.5 mHz audio. The 904 uses a 5 inch CRT (Emiscope 3/1) triode and the 905 uses a 7 inch CRT (Emiscope 3/2). Magnetic focus and deflection, approx. 45 degrees.

Radio: Short (16-52 meters), Medium (200-550 meters) and Long (750-2000 meters) wave bands.

Function	Quan.	Type	Notes
RF amplifier	1	MSP4
Oscillator/mixer (frequency changer)	1	X41C	37 mHz local osc. frequency
IF Amplifier	1	KTZ41	Video (5.5-8 mHz), audio (4.5 mHz) and radio (456 kHz)
IF Amplifier	1	KTZ41	Video and audio
IF Amplifier	1	KTZ41	Video only
Video detector/amplfier	1	MS4B
Sync separator	1	KTZ63
Horizontal (line) oscillator	1	KTZ63
Horizontal (line) output	1	KT63
Vertical (frame) oscillator	1	KTZ63
Vertical (frame) output	1	KT63
Audio detector and AVC	1	MDH4
Audio Output	1	KT41
Rectifier (HT)	1	U52
High Voltage (EHT)	1	U17	2500 VDC