MOTM

Electronotes had a "plan" for a through-zero VCO (I don't think
Bernie got all the bugs out).

Mainly, you need good matched PNPs ans the only ones you can get now are the
SSM 2220s.

As Doug said, the circuitry is rather involved. It reamins to be seen
if the market can bear an even more $$$ MOTM VCO!

Paul S.