Using Damper Diodes for B+ Supplies
I'm contemplating using a pair of 6AU4GT damper diodes for a full-wave
bridge, with a 700 VAC CT tranny.
Yet the spec sheet for the tube has these limits:
Heater positive with respect to cathode:
DC: 100V
DC + Peak: 300V
Heater negative with respect to cathode:
DC: 900V
DC + Peak: 4500V
I assume that during an AC cycle the cathode will "see" -350 volts relative
to the heater which would normally be operating near ground.
Looks like I'd be in trouble without floating the filament at a minus
potential.
Is that a real concern in this application? And if so, is floating the
filament a -300V (using SS rectifiers) a practical work-around?
Else would I be better selecting another device or topology?
TIA,
Jon
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