Any pointers on this? Assuming the 4 terminal one is center tapped. Doesnt seem to use the center tap when i look at the circuit board for anything on the depth control. Anyone know which lug is the center tap? Or is there a way to know with measure resistance? could I omit it entirely and just use 3 lug?
Haven't run in to a pedal that uses a 4 lug center tapped pot before.
Pots can be tapped in places other than center. You can figure it out with your ohmmeter if you take it out of the circuit. I think a tapped pot can be simulated with a standard pot and added resistors, but it gets complicated.
Some 4 terminal pots just have a fourth connection for grounding the case, in which case (ahem!) it can often be ignored. Again, the best way would be to remove the pot and measure it.
HTH,
Tom