footswich MARK 4 FU2a

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Hallo, my FU2a for MARK 4 was stolen. I must do DIY pedal.

Please, help me, do anyone FU2a schematic??

Thank you
Petr, Czech Republic

 

[Aart]

www.tubefreak.com has them I think.

 

[mr_fender]

FU-3 is the "correct" footswitch for the Mark IV, though the FU-2A worked. That's a pretty tough project for DIY. The only schematic I came across was so hard to read it was useless, but I could see that it was quite a complex digital switching circuit with lots of flip-flops and timer chips. It would probably be easier to build something that uses the switching jacks on the back of the amp rather than the multipin footswitch input. The three channel selects are momentary, and the others are latching, I believe.