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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!

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Old 22nd Sep 2015, 1:12 pm   #21
BottleMan
Tetrode
 
Join Date: Mar 2015
Location: Ashford, Kent, UK.
Posts: 93
Default Re: 1960 Vauxhall (and Ford) 3 valve MW/LW 12v car radio

Gentlemen

While waiting for someone to answer my question, I tried a bank of four white LEDs (horrors!), edge-lighting a new Perspex dial. This fed from the same point as the lamp at 15mA per LED. I then changed the parallel resistor to get half the radio's input voltage at the lower filaments. It does look quite good, so I'm sticking with it.
I then powered the radio up and found that the vibrator was dead. I took it apart and found that the contacts were beyond repair. Read up what other people had done and I decided that I should make a solid state replacement. I had some Unitrode (now TI) parts from some previous work and some PMOS FETs and I made up a circuit on a piece of Veroboard that just fits in the vibrator case. I'm about to test it. Wish me luck.

Graham
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