View Single Post
Old 26th Nov 2020, 6:24 pm   #550
Radio Wrangler
Moderator
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,803
Default Re: BBC TV: The Repair Shop

It would be unusual if the builder had done it all with original design, so I wonder where the sections of it might have come from.

The classic push-pull EL84 amplifier of the period was the Mullard 5-10. I spotted an ECC83 in a close-up shot (Real Mullard and yellow marking to boot) Or could it be a copy of the leak TL12?

With the Mullard modules in the tuner, is this a collection of circuits out of the Mullard book? That long slide pot for tuning looks odd with just a 9v battery, there isn't enough voltage for getting the best out of varactors.

Does the combination of preamp controls - especially those filters - fit anything known?

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is online now