[sdiy] oscillator transistors, on Vox , was: RE: Oscillator caps - please help!
Peter Blackett
dragon.servicing at virgin.net
Fri Aug 17 17:53:05 CEST 2007
Hi,
I've changed some transistors on a Farfisa Console Organ and I found
that using different types of transistor doesn't affect the stability
very much, as long as they are Silicon transistors.
if the original uses germanium transistors then the stability won't be
as good.......
but if you replace them with Silicxon ones you may have to change the
bias components.
( was it the early Vox's that used Germanium transistors ? )
regards Peter
Antti Pitki wrote:
> Oh, I forgot. I assume it's OK (by OK I mean that the oscillator is
> stable) to use any basic general purpose transistors for the main
> oscillators of my Vox Continental 2 (as long as the polarity is
> correct)? These don't need to be special temperature stable
> transistors (if there are such transistors, as I said, I'm a beginner
> in this stuff)? The oscillator is a typical "organ oscillator" (a
> Hartley oscillator?) with a adjustable coil, two caps and a transistor.
>
> Antti P.
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