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RE: Hmmmmmmm...

I just simmed a PP 300b amp with 375 volts plate, 560 ohm common cathode resistor giving a bias voltage of -65.

Driving it with 97 volts peak there is still some current flowing in each tube at all times. 8ma minimum.

Are the tubes still operating in Class A?

Driving it with 112 volts peak there's still 1ma.

Still Class A?

Without considering symmetry the "360 degrees conduction" is not much of a definition.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

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