Thanks, Trevor. I have no taste for discussing this in a thread already
so contaminated with Krueger's deceit. I have lifted your post and
started an entirely new thread "SET v. PP, the big fight tonight". See
you all there. -- Andre Jute

Trevor Wilson wrote:
"Andre Jute" wrote in message
oups.com...

Trevor Wilson wrote:
"Andre Jute" wrote in message
oups.com...
Arny Krueger wrote:
the usual SET dogma of maximizing distortion.

Is this a troll Krueger or do you really believe your own dumb ****?

**Nope. It's actually close to the truth. Please refer to the Radiotron
Designer's Handbook, for further information. If you want me to provide
page/section numbers, let me know.


--
Trevor Wilson
www.rageaudio.com.au

Amazing. I have several copies of the RDH so I can read it anywhere,
like a bible. I have never seen anywhere in the RDH anything to support
Krueger's claim. I'll deconstruct Krueger's silly claim later.

**Then I suggest you read the following sections, VERY CAREFULLY:

Section 13.1
Section 13.2
Section 13.4 (Not entirely necessary for this discussion)
Section 13.5 (note the following words on page 574: "Push-pull operation
tends always to reduce the effects of hum in either the grid bias or plate
supply voltage.")
Section 13.6 (Not strictly for discussion, because they speak of non-Triode
amplifiers)


Meanwhile, could I suggest politely that you compare Krueger's claim

**I am responding to what YOU wrote. If Mr Krueger wrote something
different, then you'll need to post a clarification.

carefully to those pages before you embarrass yourself by posting page
numbers on which I shall demonstrate clearly that Krueger's claim is
not supported, in fact, quite the opposite. I wouldn't want a
fellow-Australian, even a silicon-head, publicly to fall into the same
trap as a recklessly blustering American like the thief Bret Ludwig.

**I have enjoyed some robust argeuments with Mr Ludwig. Some of his ideas
are completely nutty. On the issue of SE(T) amplifiers, however, we are in
agreement.

Your disgrace may reflect badly on Patrick and Phil and me and several
perfectly decent, if misguided, fellow-countrymen on RAO.

**I am quite happy to discuss the merits of various amplifier technologies.
Patrick, for instance, steadfastly refuses to address the following points I
made about SE(T) amplifiers:

---
* ALL SE amps suffer from even order harmonic distortion, which is
automatically reduced by using push pull topology. IOW: All things being
approximately equal (same output valves, high quality iron, good power
supply, same bias current, etc) push pull will outperform SE.

* ALL SE amps suffer appallingly bad load tolerance. IOW: A 20 SE amp (at or
near clipping) will deliver 10 Watts @ 4 Ohms, 5 Watts @ 2 Ohms and so on.
Unless the user has an almost resistive load, then severe power problems can
be expected. This problem can be eliminated by using push pull topology.

* SE amps are MUCH less efficient that a similar power PP amp.

* SE amps, generally, exhibit higher levels of hum and noise than PP amps.

* SE amps have a lower damping factor than a similar PP amp. This may lead
to audible frequency response problems, within the audio range.

---


--
Trevor Wilson
www.rageaudio.com.au