Flurko wrote: ↑Sat Mar 09, 2019 1:16 pm
Im going slightly nuts with what I want the rythm circuit to do :
I'm going to install two piezo discs inside the guitar, and i'd like them to have each their own volume pot (the classic JM slider pots), and I can't figure out how to wire the rythm switch to get the piezos in and out of the circuit, without them being controlled by the normal volume pot.
Hope you don't mind me taking this one Shadoweclipse13, but my brain is in circuit mode at the moment.
So Flurko you want to choose between just the piezos on their own or just the lead circuit on its own ? Or do you want to add the piezos on top of the lead circuit ?
I'm guessing the latter, but the former is simple, with the existing hardware. The rhythm and lead circuits are completely isolated in the stock JM wiring - the rhythm/ lead switch swaps between them. Same as in a jag (see below) - just with the JM's 3-pos toggle where the jag has the the two pickup on/offs, in the lead circuit (only). So just pull out the stock rhythm circuit and put your piezo circuit in place of it (using roller pots as your piezo volumes) and it won't be affected by the lead controls on the main control plate.
The latter could be done by swapping the rhythm/lead DPDT to a 3-way (middle on) switch (might need some drilling of the pickguard for greater switch travel, or another switch location ?) and moving it in the whole circuit to just before the output jack. Neck PU would be wired direct into the stock 3-way toggle, instead of to the rhythm/lead DPDT (which will be gone). And the new switch at the output stage would take the lead circuit, piezo circuit, or both outputs.
Note: Whoever did this classic jag circuit diagram got the rhythm vol and tone pot switched.
"I just knew I wanted to make a sound that was the complete opposite of a Les Paul, and that’s pretty much a Jaguar." Rowland S. Howard.