On Mon, 25 Oct 2004 22:13:16 +0300, "Iain M Churches"
wrote:


"Stewart Pinkerton" wrote in message
.. .

Right, you interpret an amp which *changes* the input signal as
'better'. OK, I see where you stand.

No, sorry Stewart. Neither I or any one else as far as I know has said that.

You said that valve amps sound better. Good SS amps are sonically
transparent, i.e. what comes out sounds the same as what goes in. That
being so (and readily proveable under level-matched blind conditions),
then if you prefer 'valve sound', then you *by definition* prefer an
amp which *changes* the input signal.

You are an ignorant fool.

Please try, just for once to be civil.
Your loutish outbursts do not
become you.

That is not a 'loutish outburst', it is a simple observation, based on
your posts and confirmed once again in this one.

Given a flat open-loop response, NFB affects
all harmonics equally. What cancels even
harmonics is push-pull operation, not NFB,

If you had taken the trouble to read carefully what I wrote,
instead of frothing with expletives, you would have realised
that I was referring to the feedback loop from the secondary
of a push pull output stage.

I read what you wrote. You claimed that NFB cancels even harmonics,
implying that it does nothing to odd harmonics. That is rubbish. It is
also rubbish that the feedback loop from the secondary
of a push pull output stage affects only even harmonics.

The NFB greatly reduces the even harmonics, but not the
odd. Come on over and have a look at the spectrum analyser.
I have a HP3581A. Even you cannot argue with that:-)
You can even go for a spin in the Armstrong:-)

You are talking nonsense, and you clearly cannot use your
instrumentation.
--

Stewart Pinkerton | Music is Art - Audio is Engineering