[Multi-grid]

That's a bunch of nonsense and drivel, if the cancellation were simply
the result of "the finals are biased so that the change in
characteristic for the opposing phases approximately cancels", then the
amount of odd order distortion could also be changed by PP connection.
The fact is that the even order cancellation is not dependent on the
biasing of the tubes, beyond the requirement that the two tubes are
identical and are both biased the same.

So then John, when one is cut off, what is cancelling?

and on this: "The fact is that the even order cancellation is not
dependent on the biasing of the tubes, beyond the requirement that
the two tubes are identical and are both biased the same.

And how are two tubes 'the same' when one is in the traditional AB
bias piont? Further, as one starts cutting off( not far from its idle
point ), how is this remotely like what is going on in the other
phase?

I'll give you a hint.....nah, you'll get it eventually.

Do try and keep your answer out of the Nonsense&Drivel category.
cheers,
Douglas







Check your High School Trigonometry book to understand why the even
harmonics cancel while the odd ones don't, it's a simple bit of math
that doesn't depend on bias, only that the two sides of the PP circuit
are identical.

No kidding. Where would one get these magical identical tubes?

Getting a class A amp to cancel its 2nd HD is not a trivial exercise.
I suggest you try it on your AB amps, just for kicks.
cheers,
Douglas