You might be able to find a slider switch for 110/240 vac, but adding 12vdc into the mix might be asking for too much. There's a reason why different voltages use different plugs. It keeps you from letting the smoke out.
Depending on the transformer ( specifically the output) you might be able to wire in after the xformer directly with the 12 vdc. Now you're staring to get above my comfort level, but this stuff should be a piece of cake to a good amp tech
How often would you be switching from 120/240 vac?
Quote:
Originally Posted by bflatsharp9
Yes this was my original thought but now I wonder .... I wonder if it's possible to have some sort of switch to go back and forth from 220v or 110v to 12v
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