On 22 Oct 2004 14:13:12 GMT, ohawker (Andy
Evans) wrote:

From a man who will not / can not even measure the performance of his
own design

Let me repeat for the nth time where n is a large number that I have nothing
against engineering whatsoever, and I go out of my way to have my amps measured
on scopes and distortion meters.

As for "up-to-date" and valve technology

Yes, that's exactly what I said. Check posts on audio Asylum.

I presume that means that ECC83s, 12AT7s, EL43s and the like are
not to be found in your designs?

Correct. I've already given a list of valves that sound better. If you want
references:
a) Valve Amplifiers, Ed. 3 Morgan Jones
b)
http://www.audioasylum.com/cgi/m.pl?...hlight=6sn7+th
orsten&r=&session
c) http://www.geocities.com/la1zka/hifi/distortion.html
d) http://www.enteract.com/~joepage/tubelist.htm
http://users.rcn.com/joepage

I don't want references, what do you use? When were they invented and
how did you decide on the right ones to use?

And of course transformers no longer
have hysteresis losses and non-linearities?
And ss amps still use elecrolytics in the sugnal path.

My ss amp has none. And of course, in relative terms, the effects of
an electrolytic cap are absolutely minute compared to those of a
transformer.

d
Pearce Consulting
http://www.pearce.uk.com