using fender amp ground switch as impedance selector

[pula58]

Anyone ever use the ground switch on the back of an old blackface or silverface amp as a transformer output tap selector with a replacement multi-tap output transformer?

Is the location of the switch a food one for routing output wires between the output transformer and the speaker jacks??

[Ronsonic]

I've seen it done. It does run close to the AC power stuff and over the rectifier tube if there is one. Haven't seen problems in the ones that had it.

[donnyjaguar]

Be sure to label it with the appropriate impedances. And write them upside down. You'll understand why when your using it.

[Swarty]

There are 2 varieties; earlier amps have an on-on w/ 3 terminals that should work fine for selecting 2 impedences; later amps have a on-off-on switch that I don't believe will work (I don't recall there being a terminal for the "off" position). If there is a terminal for the "off" position it will work fine for selecting 3 impedences.

[pula58]

the chassis I might do this to is a silverface. The ground switch has only two terminals.. I'm getting a new a/b switch, that ought to do the trick.

Thanks!
P.

[pula58]

I did the mod..it works great..no problems! I had to get rid of the clutter of wire that was there for the (long removed) ground ("death") cap.

P.