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Old 10th Feb 2018, 9:51 am   #20
Freya
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Join Date: Jan 2009
Location: Falmouth, Cornwall, UK.
Posts: 1,987
Default Re: GEC BT336 possible tube change

It sounds like you have an issue with the line oscillator, as well as an EHT fault.
The previous suggestion of passing a voltage through the overwind for a time may be enough to drive out the residual moisture that causing the overwind breakdown, its certainly worked for me on numerous occasions.
Out of interest, in your initial post you said the CRT was worn out, have you checked all the other valves conditions. If the CRT was worn out maybe some of the valves are tired too.
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Last edited by Freya; 10th Feb 2018 at 9:58 am.
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