I do not use this amplifier frequently and maybe it is a mistake. I mainly work in CW with 50 W and that’s enough for me.
So last week, I turned it back on and after a few minutes I saw, that in the “stand-by” position, there was an anode flow of about 100mA.
Absolutely abnormal !!!
A 572B exibits a short-circuit between grid and filament.
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