eddie--

1) Find a Volume pedal, an old wah pedal, an old MIDI expression pedal, what you need is one that uses a Potentiometer that is turned by the pedal action (NOT one that uses lightbult with shutter to phototransistor or the like, although it would be possible to use one, it would likely take more circuitry and savvy ti implement.)

2) Now you will have to identify the resistance and taper of the original Potentiometer in the target device. It will likely be a Linear Taper pot.

3) Once known, you then have to obtain a potentiometer of the same value and same mechanical mounting and shaft dimensions as the one in the Volume Pedal.

4) Remove the pot from the Volume Pedal and replace it with the new one of the right value. This may involve having to drill a small hole thru the shaft of the new pot for a pin, or it may be done using epoxy adhesive to hold the gear or pulley to the pot shaft.

5) There are three connection points to the pot, you need to find out which one of the three references Ground or Chassis Common.

6) Use a standard two-wire with shield "mic" or balanced type cable to go between the pedal and the unit. Wire the shield to the pin that is Ground on the unit's original pot after disconnecting it.

7) Don't make that cable too long, just long enough to reach where it has to go.

All that said, be advised that there are MUCH better tonewheel organ and rotary speaker simulators around today. For example, the CASIO WK series keyboards with the Drawbar Organ section sound simply amazing and the street price for new is under $500. A used one can be found for a lot less.


--Mac

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