"DoN. Nichols" wrote in message
....

You can't -- but there are 240 V rated ones with a center tap so
you can feed them from 120 V and still get the whole range.


I've got one of those that has considerable output droop under load
above the tap. IIRC the max current falls from 10A at the tap to
about 6A at the top end. I don't have it wired up in an enclosure, and
I'm not about to power it up exposed on the bench.