I just finished my plexi clone (50W) with some mods (tube effect loops, power scaling).
I noticed I have some noise (like a ground loop) when I jumper channel (Bright Low , with Normal high) and I keep my guitar plugged in Bright High.
The noise seems like a ground loop or something like that.
As grounding scheme I used KoC galactic grounding, so every Filtering Cap has a ground point (like in Larry ground scheme) but the grouning point is isolated from the chassis and then a single wire connects all the "points" on together and goes finally on the chassis near to the input jack.
Both (couples) of jacks has their own ground wire going on the chassis on the point I said before.
I tried to use both a guitar jack to bridge the jack, and a stomp box cord. same result.
Do I have to use a special cable to have bridging withouth this "noise"
Thanks a lot.
Krusty