Temolo Speed Control Pedal for a Yamaha RA-100

[ipozestu]

I am new here. I have to say I think I came to the right place for these questions. I just bought this Amp the other day. It's a sweet little piece of audio nostalgia. It has 1/4 stereo out to a dual switch that control voice: either through the main 12s or through both the 12s and rotating tremolos. The second switch is for switching the tremolos speed with is controlled by a knob on the back panel. I though it would be cool to be able to drive the speed of the tremolos with a foot pedal. I'd like it to function as it does now except when the remote pedal is plugged in it bypasses the Amps internal speed control and sends it to the pedal. The overall concept is solid.  The execution, well that leaves a lot to be desired. I've attached a couple of links to give you an idea of what I'm talking about.

http://www.grouseguitars.com.au/sold/morepics/moreyamahara100.htm

http://www.scribd.com/doc/4628147/Yamaha-Leslie-RA100

[ipozestu]

Nothing huh? Any suggestions?

[Cliff Schecht]

Find a dead wah shell and a normally closed switching jack. What you're trying to do has been done many, many times before. Your only problem may be fitting a potentiometer inside of the wah pedal that is the correct value.