If you would like an excellent solution to powering up your wire go check out Fry's. The one in San Diego has variac's for around $25 to $60. I can't remember all of the spec's but I think the cheapest one would do the trick.
It's in a nice metal case with rubber feet, plugs into your AC outlet, has an on/off switch, and a dial to dail in any voltage within it's voltage range. I bought mine over the Internet (search for Variac's and you should be able to find one for sale near you) and paid a bit more but it may be higher quality. I may have also just paid too much