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In Reply to: RE: Yours is not a conventional understanding of a "class" of operation... posted by Steve O on August 16, 2016 at 17:00:59
Class A has historically referred to a single-ended stage operating near the center of its conduction window. Such use may not be mandated by the broader definition you prefer, but it represents the original concept to which the delineation of the various classes was applied. No one 50 years ago would have accepted a stage operating at 1/20 of the midpoint as being Class A. If a design needed such reduced power, a smaller tube would have been used. You can attempt to change the meaning of CLass A to apply to such cases, but those of us who know better will always correct your error.
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Class A is a few things rolled into one. Most importantly, the final(s) don't get cut off within the power at distortion specification. The x watts Class A, and XX Watts AB is BS. It is an XX Watt, AB amp.
You can certainly cut off a SE stage if you push the distortion spec far enough, and feed it enough signal.
Class A is not just continuous conduction, it is continuous conduction at full power. That this effectively sets the tube operating in the middle of its characteristics is a side effect. Or maybe it is the other way around.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
....You've changed no minds, I've changed no minds, precisely nothing has been corrected . LOL
Have yourself a great day!
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