On Oct 23, 8:51 pm, John Byrns wrote:
In article . com,

Multi-grid wrote:
On Oct 24, 1:37 am, Andre Jute wrote:

As for Dougles Multi-grid's silly insistence that signal and
dissipation have nothing to do with Class A operation, thanks for the
giggle, sonny, but you'd better hit the books lots more before you
seek entry to this club.

They don't Andre, no matter how much you claim they do. Class A, is as
simple as you first stated it:

***Class A operating conditions do not permit the output device to
cease conducting.***

Precisely, that is why when the operating conditions of a class AB
amplifier are restricted by limiting the applied input voltage the
amplifier is able to put out class A power at a level that is lower than
the maximum available class AB power.

It should get the addition that remote cut off behaviour is not
included.

Most real world tubes display remote cut off behaviour as the plate
curves become distinctly compressed in the high voltage low current
quadrant. I guess that rules out the possibility of any tube amplifier
operating class A.

John, with respect:

Andre is out of his depth on this one. And his typical response to
being out of his depth is to repeat, attack, repeat, attack, and then
repeat again. But none of that makes what he states true or correct.

And as your life's work is somewhere between cleaning up after him,
powdering him and changing his diapers and seeking exceptions and
outliers, I am not surprised that you are joining this discussion as
per usual.

There have actually been some reasonable discussions on tube lore
lately - those from which Andre has stayed away. And, were he to
refrain from delivering (typically incorrect) absolutes he might even
be capable of intiating and even participating in such discussions.

But, it is very hard for a pretender to stick to what he knows and for
a poseur to pronounce with less than "papal" infallibility. Which
makes Andre little more than a charlatan and never-was with delusions
of adequacy. All-and-at-the-same-time, he is a big boy of some 60+
summers and well able to manage his own affairs and discussions... or
it would be so were he mature enough to understand. Infants usually
and eventually become potty-trained. And that is the essential
difference between Andre and an infant, and why your efforts at clean
up after him are futile. He will never change however heroic your
efforts.

If you want an analogy, GM, some time back had a V8 engine that
*could* fire on 4, 6, or 8 cylinders depending on load conditions. But
it was never "other than" a V8, nor could any amount of wishful
thinking or closely held beliefs make it "other than" a V8.

Peter Wieck
Wyncote, PA