On Oct 26, 8:27 am, Chel van Gennip wrote:
Andre Jute wrote:
That is why we have this thread, to explain to the three self-styled
"engineers" Graham Stevenson, Arny Krueger and Don Pearce that a Class
A amplifier must have its signal limited or it is no longer a Class A
amplifier. How can any properly educated engineer not know that the
signal in an amplifier class is by necessity limited? Yet those three
signed their names repeatedly to a claim that Class A is
an amplification Class in which "the output device(s) never cease
conducting under any signal condition."

You really should try to express yourself more clearly. There are
several modes of amplification. In Class A "the output device(s)never
cease conducting" Amplifiers are designed to use one (or more) modes of
amplification. When used outside the specified signal range, the
amplifier wont operate in the designed mode(s) of amplification. e.g. if
you don't supply mains power, none of the output devices will conduct.
Even switched off, and not operating at all, an amplifier designed to
operate in Class A will remain an amplifier desinged to operate in Class A,

Now you're down to pulling the plug to make an absurd misdefinition by
Graham Poopie Stevenson work. That is taking professional solidarity
among "engineers" too far.

But all right, Mijnheer van Gennip, you want to be a slim jannie --and
in English too! So show us how you would design an amplfier either
Class A or with substantial Class A output (i.e. Class AB) in which
"the output device(s)never cease conducting under any signal
condition". Note the important qualification "under any signal
condition". That means exactly what it says in plain English: you
design the amplifier, I choose the signal level to be vastly larger
than the specified bias, then you prove it still operates in Class A.

May you have Pinkerton's Luck. By all means call on the Three Stooges
for help.

Andre Jute
Visit Andre's books at http://members.lycos.co.uk/fiultra/THE%20WRITER'S%20HOUSE.html

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