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previous: Dan I believe, by definition, all SE am... -- 12/1/2003 10:12 PM

Re: Voltage Q: 6L6GT SE cathode bias

12/2/2003 1:33 AM
Rob Mercure	Re: Voltage Q: 6L6GT SE cathode bias Dan, Not so - and as fate would have it - I commented on this in one of the other forums. Class A just means that current flows through 360 degrees and, if one wants minimum distortion, a single tube must be Class A. But it ain't perxactly the same thing. Lots of radio frequency oscillators and amplifiers operate SE in Class C where current flows less than 180 degrees using a resonant "tank" circuit to create a sine-type waveform. And we musn't forget tubes used for DC purposes or switching. And, for yucks, you can bias a Champ type circuit to scant AB1 and get some interesting, and nasty distortion artifacts. Rob

12/2/2003 1:33 AM

Rob Mercure

Re: Voltage Q: 6L6GT SE cathode bias

Dan,

Not so - and as fate would have it - I commented on this in one of the other forums. Class A just means that current flows through 360 degrees and, if one wants minimum distortion, a single tube must be Class A. But it ain't perxactly the same thing. Lots of radio frequency oscillators and amplifiers operate SE in Class C where current flows less than 180 degrees using a resonant "tank" circuit to create a sine-type waveform. And we musn't forget tubes used for DC purposes or switching. And, for yucks, you can bias a Champ type circuit to scant AB1 and get some interesting, and nasty distortion artifacts.

Rob