Posted by Tnuctipun [ 64.12.116.14 ] on January 27, 2005 at 20:14:27:

In Reply to: Quick and simple formulae for Ra posted by Damir on January 26, 2005 at 15:14:26:

a.k.a. changing plate z. Drawing the 3k5 load line on the WE 300B curves shows a significant variation in plate z from one end to the other. Less variation from idle to g1=0, but from idle to g1=cut-off the variation is more pronounced and damping factor goes from 5:1( 3k5 load/700R plate z ) to a significantly lower number.

I suspect this effect is responsible for some of what is referred to as SE magic. change in output z dependant on position on the waveform. Looks to vary a lot more than Class A PP. I do prefer to listen to PP power stages, and am always searching for an answer to the 'WHY' question...
regards,
Douglas

Replies:

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