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Old 4th Dec 2017, 1:05 pm   #4
ukcol
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Join Date: May 2003
Location: Harlaxton, Lincolnshire, UK.
Posts: 3,944
Default Re: GEC BC 4750 Fault

Quote:
Originally Posted by Radio Tech View Post
....and some of the coupling and de-coupling capacitors.
Yes, change ALL the paper dielectric capacitors. They will all be leaky to a greater or lesser degree. Leaky decouples can alter the DC conditions on valves causing various symptoms and the AGC function can also be defeated by leaky capacitors.

I always change all the paper capacitors in a set and they always test leaky at their working voltage.
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