3PDT True Bypass Looper wiring

[Drlufk00]

If I wanted to use the diagram below for my looper switch to completely ground input and output of the FX looped pedal (It’s an RC3 looper that introduces an annoying white noise when plugged that I can hear even when I have it looped using traditional 2DPT wiring), I have some questions;

I assume PCB in and PCB out are where I wire to my effect in and out?

Where would it be best to run the ground to? The ground/sleeve tab on one of the 4 jacks?

Do I still need to connect all 4 jacks via ground?

I also attached my first 2 versions I did where I could still hear the noise introduced from the pedal. I tried with a noisy germanium fuzz and it silenced it completely but the RC3 would not be silenced

 

[Feral Feline]

...

I assume PCB in and PCB out are where I wire to my effect in and out?

Yes.
"PCB IN" = SEND
"PCB OUT" = RETURN

Where would it be best to run the ground to? The ground/sleeve tab on one of the 4 jacks?

Yes.
Or..
A wire to one of the enclosure's corner screw-holes...
Or...
You could rig up some kind of spring like you see on EHX-PCBs that make contact with the enclosure — which brings us to...

Do I still need to connect all 4 jacks via ground?

No.
The jacks you've used are already grounded to the raw-enclosure via metal-on-metal contact. The ground wiring should be redundant.
Check this with your DMM set to continuity-mode. BEEP!
If you had plastic jack-bodies, then you'd need to wire up the jacks to each other, but one of the four jacks would need to be metal so as to ground everything through the enclosure...

Which, come to think of it, now makes me wonder...

If you switched the SEND and/or RETURN jack(s) to an isolated plastic jack — that might solve your RC3-Hum problem.

Maybe that's the problem, may be you NEED an isolated jack ...


Do you have one to try?



Maybe Stinkfoot's info will help:

Building a connection box for the pedalboard – stinkfoot.se

stinkfoot.se