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James Moritz schrieb:
> Dear Uwe, LF Group,
>
> The author is Douglas Self, quite well known for his audio PA designs in
> "Electronics Wold" magazine here in the UK. This figure seems to come from
> http://www.dself.dsl.pipex.com/ampins/dipa/dipa.htm#3 - near the bottom of
> the page.
>
> Cheers, Jim Moritz
> 73 de M0BMU
>
>
Dear Jim,

what a coincidence you knew the answer!
I studied the text "Distortion In Power Amplifiers" some years ago and copied 
the last diagram and nothing else.

thanks, Jim

best regards

Uwe/dj8wx