[Amps] AL-1200 Intermittent HV Short

[ka1xo at juno.com]

Hi Ed,

Regards from UPS destruction-headquarters.

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On to your amplifier:  Did you remove the tubes and try the experiment?

Did you open the +HV line and try the experiment?  This might indicate
if the flash/bang is in the power supply department or in the tank.

Look carefully from where the DC enters the RF cage, right through all the plate choke and bypass device departments. You might have a close proximity of hardware that's bridging an arc when the DC voltage is high enough to jump.

Hal Mandel
KA1XO