Penfold modules up and running!

[Josh Brandt]

> I was wondering; did you pretty much stick to the
> original parts list and schematic or did you try to
> upgrade anything?  You'll let us know when and how you
> whip that VCO into submission, won't you?

I used pretty much all original parts, since I had the LM13600's kicking
around and some random op-amps. The 741's in this one are all in the
exponential converter side of the circuit, so I'm not sure how much effect
swapping them for better ones would have. I would think not as much, since
it's not in the audio path, but if it could help it track better, I'm all
for it. Any suggestions as far as this goes?

Josh