[sdiy] ARP VCO PNP-NPN exponential pair matching

[Dave Leith]

OK, thanks, I have some handy

is there any matching or selection needed?

Dave

On 6/7/08, Paul Schreiber <pschreiber at sbcglobal.net> wrote:
> > The THAT 340P  may work fine for this application but I'm not going to
> > be able to squeeze a 14pin dip package into the space of 2
> > transistors, well at least not with extreme difficulty :-)  so I think
> > I'll prefer to go with discrete transistors if at all possible.
> >
> >
>
>  Then use a BC550/BC560 pair, cheap, high gain, better than ARP ever had :)
>
>  Paul S.
>
>