Forwarded because I wouldn't want Arny to think I talk about him or his
monkey behind his back. -- AJ

Andre Jute wrote:
If either if you two blustering nincompoop pinheads, Pinkothicko and
Poop Bear aka Graham (1), had been awake and paying attention any time
in the last ten or fifteen years, you would have known that I spent
years explaining to the ultrafidelista that their amplifiers are loaded
with negative feedback. that SRPP is not a constant current device but
in fact a form of cathode follower, that cathode followers are negative
feedback devices, that their beloved DHT sound so good because the
feedback is built in, in short that feedback is a natural concomitant
of audio engineering, as it is of virtually all engineering.

If either of you two mouthfoaming spittle-spraying moldgrowths had been
sober and attentive, you would have discovered that we discussed
internal feedback in a 300B at some length on RAT earlier this year.
But Pinkothicko, in that thread as in others, instead of learning from
his betters, ponced around sneering and jeering, jerking out insults
while the workers and grafters among us determined that the internal FB
in a 300B amounts to possibly as much as 14dB.

My beef isn't with feedback per se--I've clearly thought on it longer
and more deeply than you two have--but with quarterwits like you two
who think the world stopped turning the day they left whatever
tenth-rate school "edjicated" them.

You two impertinent wannabe anklenippers owe me an apology.

Andre Jute

(1) Arny's ignorance is as inexcusable, though at least he doesn't hang
around tube conferences trying to drain the glee from everyone else's
hobby, so he can't be blamed for not knowing that I know quite as much
as he does about feedback, and a damn sight more about double blind
testing. That Arnie drains the glee from silicon hobbyists is of course
no less reprehensible. But in this instance, Arny's ignorance is the
result of a wilful misreading of what I wrote, magnified by his usual
slimily immoral debating technique, which at least is preferable to the
soup of half-forgotten textbook rule of thumb incomprehension in which
the tenth-raters Pinkothicko and Poop Bear aka Graham flounder.

Stewart Pinkerton wrote:
On Wed, 07 Dec 2005 01:09:03 +0000, Pooh Bear
wrote:



Patrick Turner wrote:

Pooh Bear wrote:

Andre Jute wrote:

From the KISS AMP archive at Jute on Amps
http://members.lycos.co.uk/fiultra/
"an unbelievably comprehensive web site" -- Hi-Fi News & Record Review

Andre Jute explains why an ultrafi tube amplifier has Zero Negative
Feedback

Andre Jute is clearly a moron.

Graham

Well methinks moron is a very weary word to use about a description
of a simple amplifier technique that is quite valid for those
not wishing to use loop NFB.

Just what would you do if someone told you that you must not
use NFB?

Maybe you'd tell em to get nicked.

OK, fine, but what if you explored the idea?

Can you think around this idea of no loop FB, without
straight away conjuring up ideas about morons?

When you say 'loop NFB' do you mean overall NFB as opposed to local NFB ?

I actually use considerable local NFB in my own ( transistor ) designs before
using modest overall NFB to acheive the final result. There are several reasons
for this. I just prefer the idea of nice linear stages in the signal path rather
than correcting them 'after the event' so to speak. Also, applying local NFB
increaes the stage bandwidth and reduces the phase lag of the individual stages
thus leading to better overall stability considerations.

Without any NFB, the best that can be acheived is the basic linearity of the
amplifying device and this really isn't very satisfactory ( except to someone
with cloth ears maybe ).

I simply detest the unthinking 'all NFB is bad' idea that clowns like Jute seem
to have picked up which is seemingly based on a valid critique of some bad
practice that was widespread in the 70s. Actually a lot of the problem back then
was also a lack of decentfast devices - but that's another story.

The truth is that NFB is essential to any high quality audio device. Those who
want 1930s listening quality are welcome to it.

More to the point, sad old clowns like Jute seem quite unaware that
their beloved SET amps are jampacked full of NFB - it just happens to
be inside the bottles, rather like your own local NFB.
--

Stewart Pinkerton | Music is Art - Audio is Engineering