Hi Mike,

You can purchase a step up transformer which will plug into your 120 Volt supply and give you a 240 Volt output to run keyboard which requires this voltage. Power rating of the transformer is important (needs to be at least 100 VA). When I was living in Maryland in '92 I bought just such a unit from an electrical component supplier. I can't remember the name of the company. It was something like Tristate.

Cheers

Len C.