[sdiy] The PAiA 2700 VC LPF

[TooManySynths]

It's linear, Just use whatever you've got, I'll bet
it'll work. Just a hunch, I think you're thinking
about it too hard. :)

Daryl

--- Scott Gravenhorst <music.maker at gte.net> wrote:
> I'm looking at this filter again and it's so simple
> to 
> build, well...  I'd prefer to use parts I have lying
> around.  I see that the 2N3391 has a beta of 250. 
> The
> parts I have here are pretty much 2N3904.  Is there
> a
> way to make a 'crippled' darlington pair that could 
> increase the 2N3904's beta to 250 ?  I understand
> that
> a simple D-pair will multiply the gains, and I don't
> think 10,000 would be right.  My *guess* is that a
> resistor between the first transistor's emitter and
> the second's base ????  Also, can anyone tell me 
> whether this filter is for expo of linear CV?
> 
>
=========================================================
>  
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> questioned.
> 
> -- Scott Gravenhorst | LegoManiac / Lego Trains /
> RIS 1.5
> -- Linux Rex         | RedWebMail by RedStarWare
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> 
> 
> 


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