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RE: Geez...

"BTW he didn't address the fact that for it to really be ultralinear, the taps have to be properly placed."

Somehow you are missing what I said and what he said.

He never talks about a circuit that has the screen grids of the output tubes connected to taps on the output transformer. What you and I (and most everyone else) calls "Ultra-Linear". No where in the video does he address that in any way.

When he uses the term ultra-linear he means "limited Class A" where the amplitude of the input signal to the amplifier is limited to prevent the output tubes from operating in the non-linear cutoff region and the non-linear saturation region of the dynamic operating curve. The tubes are only permitted to operate in the center (the most linear part, straightest part) of the curve. What I simply call "properly executed Class A".



You and I talked about this type of tube operation by phone years and years ago. Your remark to me was "My amplifiers are not that kind of Class A".

"The graph you showed earlier was of a 6L6 whose transformer designer was dodging the patent or working from a design that did (out of 'tradition')."

I said, and it is true, that it doesn't matter where you place the taps, a pentode or a beam power tube ran in ultralinear is less linear than that same tube ran in triode mode. Also none of them, no matter how you operate them, are as linear as a directed heated triode.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"


Edits: 10/15/24
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