Badstone external voltage control mod suggestion

[Paul Perry (Frostwave)]

This is a post from Tony Allgood (Oakley Sound, UK) in reply to a quest for a voltage controlled phaser.
"The manual pot in my Badstone is slung between ground and a point just
below half the supply voltage. The wiper therefore varies between 0V and
4.5V or so.
I think one could simply detach the wiper connection and take this to
the NC lug on a normalised socket. Take the signal tag from the socket
and feed this back into the point where the wiper used to attach on the PCB.
The new CV in socket will be able to get its ground from the metal
connection on the casing if you use a lock washer.
The CV input could probably go between 0 and 5V and control the complete
frequency range. The input impedance is 27K, so it should be able to
driven very nicely from a midi-CV convertor. I don't think you need to
worry about overdriving it if you do have any incorrect voltages.H could have made the Badstone a bit better. The pots in mine are all
2M log pots. The Manual sweep pot is much better as a 10K linear, so
long as you remove R39 on the PCB. This gives much finer control over
the manual setting.

The feedback pot is better as a 10K linear too.

The rate pot would have been better ground referenced instead of being
used as a variable resistor. This would give you a larger range of
usable speeds. I haven't tried this last one, but I think I will now
since writing this..."

I havn't tried it either, but it certainly looks feasible.