[sdiy] Request brain dump on balanced lines

[René Schmitz]

>If the 3rd harmonic would be so much more unpleasant than the 2nd
>harmonic, there would be no such rule as trimming amps for
>symmetrical clipping. (I don't know which is wrong, 3rd harmonic
>being worse than 2nd, or the goal to have symmetrical clipping.
>Just wanted to point out that both can hardly be right at the same time.)

I've heared that some guitarists don't use matched pairs of output tubes (and 
not using the bias pots in the amps either) in their amps to get a better sound.

In the old days of tube amps one tried to make k2 and k4 small, to obtain 
a low overall THD. Not necessarily do that to get a pleasant sound. There was 
little you could do about symmetrical clipping, except keeping the amplitudes down.
(negative feedback came later.) Also this means that you obtain maximum power. 
At least thats the impression I have after reading some old sources like Ratheiser 
"Rundfunkröhren - Eigenschaften und Anwendungen".

Cheers,
 René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159