On Oct 25, 1:17 pm, John Byrns wrote:
In article .com,
Andre Jute wrote:
On Oct 25, 7:40 am, Eeyore
wrote:
John Byrns wrote:
Patrick Turner wrote:
Cancelation of even order harmonics occurs in amps working in class AB
during that part of the wave forms which are in class A, ie, the bits
either side of the zero crossing.
But once each tube moves into cut off, nothing is cancelled.
Patrick, I'm surprised to hear you say this. What are you trying to
tell us, that the even order harmonics are only cancelled during those
parts of the cycle when both tubes are conducting, but that the even
order distortion components reappear during those parts of the cycle
when only one tube is conducting? If you actually believe that you
should go back to the books and study the theory of harmonic distortion
more carefully. I hope you didn't get this notion from the RDH4, I
haven't read the RDH4's harmonic distortion explanation, but if this is
what it says I have just lost any respect I had for the book. In a
perfectly balanced PP amplifier the even order harmonic distortion is
completely cancelled even when the tubes are cut off for parts of the
cycle.
I'd love to know how that happens. There's no cancellation of ANYTHING once
one
side has ceased conducting !
Graham
Holy ****! Did I say yet that Poopie is ignorant and incompetent?
Nah, nobody can be that stupid and uninformed about tube basics.
There are a lot of "stupid and uninformed" people around, there are at
least three people involved in this discussion that have expressed this
same belief as Eeyore, they are Multi-grid, Patrick Turner, and Eeyore.
From Eeyore (Poopie Stevenson) I expect only the worst; he says
whatever comes into this head as the opposite of what is said by
someone he dislikes, without any reference to the facts in
electronics; I have made a separate thread to illustrate that Poopie
is joined in this perversity by Pearce and Krueger.
I've given up reading Cuddles Multi-grid's posts; it is too wearing to
think up new ways of explaining the same simple thing to him over and
over again.
Patrick is entitled to a mistake now and again; he makes so few. I saw
the above and knew you would call him on it, so I read on before I
wasted my own time telling Patrick he'd better explain himself -- and
there you were, pointing out the faux pas. Actually, I regret that
Patrick is both honest and not as slippery with words as some we have
seen here, or we could have had a dingdong as he tried to explain it
away without admitting he was wrong. I expect he will just say he
slipped up.
I actually find Patrick's total ignorance of woodsawing the most
amazing thing in this thread -- especially considering that we have a
fellow with real expertise (and ruler braces) on board RAT: Iain
Churches.
Regards,
John Byrns
--
Surf my web pages at, http://fmamradios.com/
Andre Jute
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