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Old 7th Oct 2018, 11:51 pm   #49
Refugee
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Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,549
Default Re: Need help identifying old capacitor from 1930s radio

I am getting the impression that changing the output valve to an indirectly heated type has left the bias circuit floating on the heater supply.
It might well be an abandoned repair job that has never worked after the output valve was replaced.
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