stdp switch... can I use a stsp and connect the common?

[Garydean]

I'm replacing a toggle switch, on/off, in a Fender Champion 600. It's a 4 lug switch dpst. Being Sunday and most cool stores are closed, I found myself at Lowes purchasing a 20a 125v single pole single throw switch with only 2 lugs. Am I correct in thinking that I can just connect the commons together and run the hot via the switch? I know it's better to isolate both wires, but are there any drawbacks with running the common from the AC wire right to the PT primary? It's actually a connection on the board.

thanks,
Gary

[pineapple49]

i dont think u can but have a look here might help.

[Garydean]

Thanks I saw that too. It functions, but if it's wrong, I'd like to know why.

Thanks

[Mandopicker]

Here is the schematic for a closer look.

[pineapple49]

you could supposedly wire it like this.

[Garydean]

Thanks for the info. I did find that earlier. The only drawback is, if the wall outlet was wired wrong then it would put the hot directly on the transformer even with the amp shut off. There must be other reasons why a double pole is better than single.

[Jag]

If the outlet is wired wrong, nothing you do with a single SPST power switch will make a difference, short of rewiring it. Then you'd have to rewire when you moved the amp to an outlet that was wired properly.

I don't know about the Champion but Mitch's schematic is the way I wire my Champ style amps.

[Garydean]

I agree. I connected the commons and used a spst and it's out the door.

[Enzo]

Is the switch mechanically broken? If one side of the switch still works electrically, then simply wire one side together (neutral) like you plan for your new switch, then use the existing switch's working half on the switched hot wires.

Calling either side of the mains wiring "common" is not something I am comfortable with.

[Garydean]

I like neutral too. Thanks Enzo. I took the switch apart and the mechanism is smashed to bits. The bat handle toggle flaps around like a noodle. Never knew a banjo could do so much damage. Deliverance meets the Who.