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Old 02-14-2022, 12:50 PM
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Electronic M Electronic M is offline
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Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
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It's possible the issue is a H-K short or bad H-K hum coupling in sweep or sync tube(s)...If a cathode voltage is hum modulated it would be harder to change it with B+ filtering than B+ hum.
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