Good evening,
Just a quick progress report and a couple of pictures. It's now starting to look a bit more like a TV chassis again with all the main bits bolted back together. I even managed to find some new speed fasteners the exact same size and style as the original rusty ones! The frame TX and mains choke cleaned up nicely and have been refitted.
I am now going to turn my attention to the IF pcb which needs some TLC. It needs a good scrub to get rid of the layer of mud on each side. There is a bunch of high value resistors which will need replacing and several crumbly Hunts caps. I will also remove the screening cans and check for obvious problems, check the coils for continuity and generally give it a good seeing to!
The cores all looked to have been well twiddled, but at least they all move. I expect a full alignment will be necessary.
I carefully cut open the main smoothing can under where the clamp will sit, and spent some time removing the innards and cleaning up the inside of the can. I have the new caps ready to install, but need to come up with a neat method of holding them in place.
Once the can and the IF board are ready, they can be re fitted onto the chassis and then most of the wiring can be re connected.
That will still leave the LOPT, all the pots, tuner, mains dropper, aerial input, rectifier, scan coils and speaker to attend to- so still a long way to go before first power up!
I noticed that 'MerlinMaxwell', on a thread about the Thorn 1500, was surprised how simple and how few components were needed for a B/W TV! Trust me, when you have to refurbish every single bit it seems that it takes a remarkably large amount of stuff to make a TV
In fact, it makes you realise just how difficult it was, back in 1960, to make a TV at all. Not so much in components, but all the hardware: countless metal stampings, transformers, wire, plastic mouldings, nuts & bolts etc. Also to do this on a mass production basis and to keep costs as low as possible and to produce a reliable product was some achievement
Anyway, here are a couple of pictures of progress so far.
Cheers Nick