[sdiy] Restoring a Pro-One, need simple electronic advice

[Colin f]

> Signals go directly through the Mod Wheel
> potentiometer
> so any CV solution would involve replacing this with a
> VCA. not TOO hard but not what I'd call easy,
> either...

I did this to my Pro-One about ten years ago - I put a little board in, with
an LM13700, an op-amp or two and a few caps and resistors.
The mod wheel itself was converted to output a voltage, and a normalised
socket on the back allowed a CV input to over-ride the CV to the modulation
VCA from the wheel.
It was a very effective mod.
Sadly I no longer have the P1, or any circuit details. Wasn't too hard
though.

Cheers,
Colin f