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In Reply to: It's not a question of A1 vs. A2 posted by Tre' on May 11, 2005 at 15:57:08:
We just go by the measurements...If the tube does not cut off, its class A. If we drive the amp hard enough to make the tubes cut off, the amp is clipping a few watts earlier. IOW the tubes enter cutoff after the amplifier goes non-linear.
If the amp were to go into cutoff inside of its linear range, it would be a class AB2 amplifier. But it doesn't, instead that makes it class A2 according to the books.
The tube type is also very important. Its very difficult to ignore tube characteristics when designing any amp! If we used a pentode, this type of operation would not be so easy, not the least of which would be the grid current issue which is dramatically different then it is for a 300B or 6AS7G. 6C33s have a grid current character that is much closer to that of a pentode- these things can't be ignored even in theory.
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- Re: It's not a question of A1 vs. A2 - Ralph 19:33:20 05/13/05 (0)
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