|
Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE! |
|
Thread Tools |
14th Nov 2008, 4:26 pm | #1 |
Tetrode
Join Date: May 2008
Location: Bristol, UK.
Posts: 86
|
Bush TR82B
I have been after an "82 B" for some time and everyone always says how reliable and easy to work on these sets are.
This one was acquired in non-working condition. When I examined it, it looked clean enough but the tuning dial was loose. When I turned the dial the pointer stayed put! Removed the dial (string method) and removed chassis. The rubber bushes had crumbled away and the vanes were seized up. I had some 20mm bushes (used in the electrical trade) and cut them more or less in half. I then curled them up and forced them into the original holes. I then inserted the brass sleeves. The tuning capacitor was then looked at to see why it had seized. As no vanes were bent I went to the rear and with a spanner and screw driver loosed the end bearing. As soon as I loosened it the capacitor could be moved. I removed the adjusting screw completely and cleaned the five ball bearings with WD40. I then lightly greased the ball bearing and reassembled. One of the ball bearings was larger than the others and goes in the middle and acts as a pivot. I inserted the bearing with a tooth pick. When I adjusted the end bearing I tightened it so that the vanes looked equal distance to each other when they were meshed. The radio then worked OK. |
14th Nov 2008, 4:49 pm | #2 |
Nonode
Join Date: May 2005
Location: Godalming, Surrey, UK.
Posts: 2,593
|
Re: Bush TR82B
Well done Keith,
These and the early TR82Cs don't give a lot of trouble cos they don't have AF117 transistors fitted. I've never heard of a tuning capacitor seizing up as bad as this one was but it was easy enough to fix. The rotten grommets is a common problem, one can get replacements which fit without surgery from Halfords for 99p. Howard |