250k Log to 10k Lin? (volume to expression)

Frequently asked question regarding resistors, potentiometers, types, requirements, ratings etc.

250k Log to 10k Lin? (volume to expression)

Postby stubish » 09 Dec 2014, 04:45

Hey all,
I'm wanting to make a cable that converts my volume pedal to an expression pedal. I tried with an insert cable straight in but it was a bit screwy. So I need to create a cable to convert.

the pot in the pedal is 250k audio taper. As I understand a resistor across the Center and outside lug should get me close. It's a just a matter of which value? I've seen plenty of calculators for Linear to Log, but none the other way.

edit: I'm planning to wire in the resistor into the TRS jack, so i can use the volume for either...

Any suggestions would be most helpful!

thanks in advance.
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