Wiring a 9 lug 3PDT A/B Switch

[EvanMidds]

Hey guys,
I'm fixing an intermittent A/B stompbox and plan on using a 3PDT footswitch however I'm a bit confused on which of the 9 lugs to use. I've used them before in building footswitches but had diagrams to show wiring. The box is as simple as it gets, passive, no LEDs, 3 TS jacks (1 in, 2 out), point to point wiring.

Any advice?

Thanks!

All the best,
Evan

[jabe]

For something that simple, 3pdt is about 6 lugs more than necessary. If you haven't bought the switch yet, save a couple of bucks and get a dpdt.

Holding the switch so the flat side of the lugs are facing up/down (like this: - - -), wire the input tip to the middle lug of a column, and the each of the two outputs to a lug above and below. Wire the sleeves together -- or heck, the case itself may already do that.

[Scodiddly]

This is a good application for a meter - put it in "continuity" or "resistance" or maybe "ohms" (ohms and resistance are different names for the same thing, continuity is usually resistance that beeps when resistance is almost zero).

Try measuring resistance between the various lugs, make a little map of the ones where resistance is zero (or extremely low, like under an ohm or two). Those are the lugs that connect together when the switch is in that position. Then just flip (or in this case stomp) the switch and make a new map. After that it should be obvious what's what. Probably the row of lugs in the middle are the common ones, and the ones on the sides are what get switched.

[EvanMidds]

Hey guys,
Thanks for the advice, went with a DPDT switch like you suggested Jabe. I appreciate the input guys, thanks again.

All the best,
Evan

[ThePitz]

I guess i'm too late on this one....

3pdt is good if you want an LED on it. This is the diagram I always refer to.

http://www.singlecoil.com/tb-strip/dia1.html

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