Reverb Footswitch Mod
Some players would like their reverb to be footswitchable, so they can turn it off when using distortion or when using different time-based effects. I get emails and posts asking, “Can you convert the Fat footswitch to kill the reverb?”
Yes, you can, but then you lose the Fat function. Separating the the Fat button from the footswitch and wiring the footswitch to the reverb is more work, and starts to get complicated. And some people want both.
So here’s a quick-and-dirty way to add footswitchable reverb to your Blues Junior.
I’ve got a kit for that, in the Mod Kits and Services tab. It’s pretty simple — a jack, some high quality miniature coaxial cable… and that’s it.
Drill a 3/8 inch hole in the chassis next to the speaker and Fat footswitch jack. Connect the center conductor to the top lead of C19. Bend it around the lead, close to the circuit board. Connect the shield lead to the lower lead of C19. Solder both, using only enough heat to flow the solder. Too much heat could dislodge the solder joint on the back of the board; an extreme amount could damage C19.
When you need reverb switching, plug a guitar cord and an on/off latching footswitch into the new jack. When the switch is closed, it grounds the output signal from the tank and silences the reverb.
Keep the cord as short as possible to avoid picking up hum.