GEC BT452 convertible (to UHF - 625) mono TV - UK Vintage Radio Repair and Restoration Discussion Forum

dazzlevision · 21st Mar 2011, 4:34 pm

Hello,

This is a long shot, but does anyone have the manufacturer's conversion instructions for this (Sobell designed but GEC badged) set, circa 1962? It was amongst the first TV sets to be produced after Sobell (Radio & Allied Industries) and GEC (UK) merged.

This model was also available factory fitted with a dual standard line timebase and IF unit, when it had the model number BT452 DS. In addition, if a factory fitted UHF tuner was present, it then became a BT452 DS-T.

The only 625 bit at the moment is the 405-625 capable LOPTx and a short tagstrip with some wiring to the LOPTx and line oscillator, over a slot where a 405-625 changeover slider switch can be mounted (for the 405-625 line timebase switching).

I have the switch, a 405-625 IF amplifier unit and a UHF tuner (all removed from other sets over the years) but the exact conversion instructions for this model would be very helpful.

Many thanks,

Dazzlevision

dazzlevision · 16th Apr 2011, 12:20 pm

Hello Mods,

Looks like I've drawn a blank on this topic, so please close this thread.

Thanks,

Dazzlevision

21st Mar 2011, 4:34 pm	#1
dazzlevision Dekatron Join Date: Sep 2003 Location: Near Swindon, North Wiltshire, UK. Posts: 3,612	GEC BT452 convertible (to UHF - 625) mono TV Hello, This is a long shot, but does anyone have the manufacturer's conversion instructions for this (Sobell designed but GEC badged) set, circa 1962? It was amongst the first TV sets to be produced after Sobell (Radio & Allied Industries) and GEC (UK) merged. This model was also available factory fitted with a dual standard line timebase and IF unit, when it had the model number BT452 DS. In addition, if a factory fitted UHF tuner was present, it then became a BT452 DS-T. The only 625 bit at the moment is the 405-625 capable LOPTx and a short tagstrip with some wiring to the LOPTx and line oscillator, over a slot where a 405-625 changeover slider switch can be mounted (for the 405-625 line timebase switching). I have the switch, a 405-625 IF amplifier unit and a UHF tuner (all removed from other sets over the years) but the exact conversion instructions for this model would be very helpful. Many thanks, Dazzlevision

16th Apr 2011, 12:20 pm	#2
dazzlevision Dekatron Join Date: Sep 2003 Location: Near Swindon, North Wiltshire, UK. Posts: 3,612	Re: GEC BT452 convertible (to UHF - 625) mono TV Hello Mods, Looks like I've drawn a blank on this topic, so please close this thread. Thanks, Dazzlevision