I have been asked to restore a Pye 12C console TV - what an honor!
The 12C was the first set which used the EF50 valve but due to the imminence of WWII, the government ordered Pye to recall any sets dispatched and to scrap all examples. The 12C table model, I think, was the 915 which was shown at the 1939 Radio show. However, one 12C seems to have escaped!
I can't find any service data on the set but I have obtained a paper on the design of a TV receiver intended for presentation to a professional institution in 1941 but the presentation was cancelled.
Fortunately, the paper contains a lot of very useful info including a circuit of a sound section which, with comparison of the existing set, proves that it is very, very close to the 12C - the differences are in the tone control circuits in the AF section. The vision and timebase info in the paper are a bit more sketchy but nevertheless useful.
The set comprises two separate chassis, each with its own PSU. The CRT is carried on the vision chassis, RF, Video and TBs and the sound chassis is bolted to the LS baffle board.
Unfortunately, as can be seen in the pictures, there is a lot of rust on both chassis which will need to be treated and the chassis painted which means, of course, all the electronics will need to be removed.
Here's a picture of the sound Chassis
Whilst dismantling the chassis, I came across this date printed on the loudspeaker:
Meanwhile, The electronics have been removed by drilling out some copper rivets. I have ordered some similar rivets and will re-rivet the assemblies back in place.
I have cleaned and primed the metalwork so tomorrow, I will be spraying them and assembling the transformers. The chassis will be left to harder for a couple of days.