[sdiy] variable capacitor projects?

[harrybissell]

How about a wein bridge sine wave oscillator... very low distortion... not
VC (too bad
- so sad)

Need a 2 gang cap for that

H^) harry

rkmoore at memphis.edu wrote:

> Hi y'all,
>
> I just got my hands on a very old (I'd guess about 1940's)Philco
> radio/amplifier.  I saw it on the curb for the trash collectors and
> couldn't resist the urge to tinker.  It is sufficiently damaged to make
> it not worth repairing, but there's a slew of interesting old parts.  I
> hope to take the power and output transformers and throw together some
> sort of a 10 or 15 watt guitar amplifier.
>
> Another part that intrigued me was the large variable capacitor that
> was used in the tuning circuit. I know that variable capacitors are not
> generally used in synth DIY applications because of cost, size, and
> availability, but I would like to use this for something.  Maybe some
> sort of interesting filtering module or instrument preamp could use
> such a capacitor.  Has anyone used one of these in a synth or preamp?
> Any ideas for application?
>
> Thanks,
> Richard