Hi Henry,
>Centurion Gurus -
>
No, I'm not, but I'll venture to guess anyway.
>I heard
>a small pop -
>
>Resting plate current at first division - about 70 ma.
>Plate voltage only 2000 volts and transformer hum sounds like the supply is
>loaded heavily but showing only the 70 ma on the plate meter.
>
I wonder if a fault in the HV power supply rectifier or filter is
loading the transformer, making the HV supply low as well as other
control system and bias supplies that come from other secondaries on
that transformer? Maybe that pop was a diode in the HV recifier going
bad, although I understand they usually make loud pops when they do that.
I would not recommend leaving it turned on for very long while it is
making the hum like heavily loaded.
DE N6KB
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