one 3pdt controling 2 pcbs. do i need something on the "IN" side of each board to prevent interfierence between the boards ?
Im assuming the boards are in series? If so it would be just the same as plugging one pedal into another, but with a lot of jacks/wires/switch removed. No need to put anything in front of them! Parrallel would be different deal though, you would have to use some sort of splitter/buffer, otherwise both boards would only see half of your guitar signal, and that probably will not sound to good.
Paul
yes, I'm going for the parallel idea. didn't want to totally give out my plan because this will be my march/April entry
Like Dutch says, as far as I am aware you will not be able to achieve 'true bypass' with a 3PDT switch for 2 PCB's in parallel.
might have to do 2 switches, may turn out more versatile anyways