UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

FERNSEH · 27th Jun 2021, 12:12 pm

The HMV 1920 is proving to be an excellent set but that can't be said for the remote control system, it's hopeless! Sometimes it can work well but from time to time the RC system just goes erratic, either not responding to the remote control handset or with a single click from the handset the tuner goes into constant rotation and can be only be stopped by turning the relay current control down.
This remote control system was not used in any other Thorn group models, Ferguson, Ultra, Marconi and Philco. Philco employed the "SelectaFlash remote control system which worked very well. The remote handset was a torch.
The Ferguson Senator 705T used a cable remote control.
I'll keep faith with the HMV's remote control but modifications will be necessary in order it works properly. That circuit arrangement in which the triode section of the PCL84 operates a reflex 45Kc/s amplifier and also as the DC relay driver is suspect. A separate relay driver valve perhaps? That's how Murphy did it in the remote control versions of the V659.

DFWB.

27th Jun 2021, 12:12 pm	#59
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: HMV 1920 made in 1960. The HMV 1920 is proving to be an excellent set but that can't be said for the remote control system, it's hopeless! Sometimes it can work well but from time to time the RC system just goes erratic, either not responding to the remote control handset or with a single click from the handset the tuner goes into constant rotation and can be only be stopped by turning the relay current control down. This remote control system was not used in any other Thorn group models, Ferguson, Ultra, Marconi and Philco. Philco employed the "SelectaFlash remote control system which worked very well. The remote handset was a torch. The Ferguson Senator 705T used a cable remote control. I'll keep faith with the HMV's remote control but modifications will be necessary in order it works properly. That circuit arrangement in which the triode section of the PCL84 operates a reflex 45Kc/s amplifier and also as the DC relay driver is suspect. A separate relay driver valve perhaps? That's how Murphy did it in the remote control versions of the V659. DFWB.