Dave Locher
New member
As the title says, I have a 1978 Randall head. It has two channels and came with a footswitch that allows one to switch between the two channels and to run both at the same time.
Unfortunately the switch unit is big and heavy, has a long, thick, stiff cord, and the plug connector is a bit iffy at best. The cable is thick and stiff because it has a lot of wires in it. In addition to switching the channels it also activates LEDs on the amp as well as in the switch. It is much more complex than I need.
How hard would it be to rig up a simple switch that would only do one thing: turn one channel on and off? I just want to be able to go from one channel to both. I don't need or care about the LEDs or the A/B option. I just want to channel A on all the time and a footswitch to turn B on and off.
I am handy enough to do this - I have rewired every guitar I ever owned, swapped dozens of pickups, modded effects, built my own cap switch box, wired my garage and the car I park in it, and rehoused this amp, etc. I just do not know how to figure out which wires I would need to connect to a switch to be able to turn one single channel on and off?
The file is too big to post here but the owner's manual actually has a wiring diagram for the head. You can see it here: Firmowe/RANDALL/randall%20rg100es-rg80es.pdf.html#schemat
Is this doable? I am not worried about harming the value of the amp but I am worried about killing it (or myself!). I have owned it since 1988 or so and don't plan to ever sell it.
Unfortunately the switch unit is big and heavy, has a long, thick, stiff cord, and the plug connector is a bit iffy at best. The cable is thick and stiff because it has a lot of wires in it. In addition to switching the channels it also activates LEDs on the amp as well as in the switch. It is much more complex than I need.
How hard would it be to rig up a simple switch that would only do one thing: turn one channel on and off? I just want to be able to go from one channel to both. I don't need or care about the LEDs or the A/B option. I just want to channel A on all the time and a footswitch to turn B on and off.
I am handy enough to do this - I have rewired every guitar I ever owned, swapped dozens of pickups, modded effects, built my own cap switch box, wired my garage and the car I park in it, and rehoused this amp, etc. I just do not know how to figure out which wires I would need to connect to a switch to be able to turn one single channel on and off?
The file is too big to post here but the owner's manual actually has a wiring diagram for the head. You can see it here: Firmowe/RANDALL/randall%20rg100es-rg80es.pdf.html#schemat
Is this doable? I am not worried about harming the value of the amp but I am worried about killing it (or myself!). I have owned it since 1988 or so and don't plan to ever sell it.
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