[sdiy] Tau Systems

[Stewart Pye]

Usually the transistors in discrete microphone preamp designs are PNP 
too. I've always assumed this was because it was easier / cheaper to get 
low noise PNP transistors. Even modern discrete designs use PNP 
transistors. I left my copy of "Small Signal Audio Design" at work. It 
may shed some light on this...

Regards,
Stewart.

lanterma at ece.gatech.edu wrote:
> On Mar 30, 2011, at 1:51 PM, <jays at aracnet.com>
>  <jays at aracnet.com> wrote:
>
>   
>> In the day of Japanese radios most of the transistors used were
>> germanium and not silicon. PNP germanium transistors were easier to
>> build and I think may of been less noisy than NPN ones.
>>     
>
> PNPs also seem to be used all over old guitar pedals (like the original Fuzz Face), probably for the same reasons.
>
> - Aron
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>