Quote:
Originally Posted by Diabolical Artificer
But then we'd need more HT again as the R would have a big V drop? I'm guessing the choke would then allow for a higher voltage swing because of the inductance? I guess we'd need a high inductance choke, though thinking about maybe not as we don't need to test at all frequencies.
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No, you'd use the HT voltage you'd expect. The quiescent anode voltage would be equal to the power supply voltage (strictly, it would be a bit less owing to the choke's DC resistance, but it would be a few volts - easily made good). The parallel resistance would have no effect.
Frequency? Just use a frequency such that the choke's reactance is 10 - 20 times the parallel load resistance. You've got a free hand there, up to a few hundred kilohertz if you want!
Ultra linear... Choke would have to be tapped, which makes things complicated. But that wasn't part of Andy's initial remit!