[sdiy] oscillator transistors, was: RE: Oscillator caps - please help!

[harrybissell at wowway.com]

A good transistor sub would have similar gain (Hfe or beta)

Temperature is not an issue in this type of circuit. All transistors
are ~not~` temperature stable. For use an a log or expo converter, they have
to be stabilized by controlling the ambient temperature (heating) or measuring
and compensating (tempco resistor or other circuit). 

H^) harry



On Fri, 17 Aug 2007 17:31:17 +0300, Antti Pitkämäki 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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Harry Bissell & Nora Abdullah 4eva