In article
,
Audionut wrote:
On 8 Aug, 20:13, "David Looser" wrote:
"Eeyore" wrote in message

...



Not sure what you mean, I'm afraid.

That much is apparent. Doubt you know much about the concept at all,
nor the bases of stability.

I wonder why it is that some people on this NG post simply to be
offensive to others? Of *course* Jim knows the basis of stability, at
least as well as you do, probably a lot better.

David.

Indeed, you'd hope that he does, given that he teaches degree-level
courses in the subject. Now, let's remind ourselves what the lovely
Graham actually does........

FWIW I've assumed that Graham (Eeyore) designs audio items like power
amplifiers and that he has some knowledge of the relevant engineering. That
was why I was surprised by his reaction to the new page I put up. However I
have assumed this may be because he isn't familiar with the measurement
methods used by RF/microwave engineers to do things like determine
transmission line and load behaviour, and so misunderstood the purposes of
the measurements I graphed.

From his responses I do take it that he *does* think that there may well be
some audio power amps in use that are not unconditionally stable, and/or
which have high output impedance. if such amps are in use, then the results
I presented do have some relevance in practice in such cases. And if he or
others read the *earlier* pages in the series they can see I have already
discussed the use of output networks, causes of instability, etc.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
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Audio Misc http://www.audiomisc.co.uk/index.html