Quote:
Originally Posted by astral highway
Donald, now that you’ve checked the speaker, what about C20? The reason I mention it is that in some fault conditions, EHT can develop on the primary side, making this leaky. This was linked to the first ever problem I encountered in a valve radio.
That would be one candidate for your symptoms. May as well systematically work backwards from one side of the speaker into that red zone.
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Thanks for your ongoing interest and support.
C20 has been replaced with a 1kV 0.01μF ceramic capacitor but I can easily remove that and change if required.
I do like a systematic approach rather than randomly changing components in the naive hope that the problem will somehow be resolved.
I'm pressing the
PAUSE button on this Thread - as I said earlier
"I think I'll put this DAC90A back on the shelf for a few weeks until I've got the stamina to tackle all those checks!"