Q. about negative bias supply value

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

Studying circlotron OTLs for a little project of mine is making my brain hurt.....
Why is the bias voltage in the output stage of Scott Dorsey's OTL (schematic on this site) -200v instead of -100v?
Seems like -100v is more than enough to bias the valves down into cutoff - or aren't the cathodes of the output stage at 0v like I am assuming? Are they actually at -150v in relation to ground?

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Topic - Q. about negative bias supply value - thenewguy 13:48:39 08/29/02 (1)

Re: Q. about negative bias supply value - Paul Speltz 18:34:38 08/31/02 (0)

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