A Variac, What size? What brand?

[transmaster]

I need a Variac. I already am going to pick one with a isolation transformer in deference to the hot chassis Zenith portable I am working on but I am undecided as the the power capacity. The biggest current draw I am likely to use one with would be an HF amp. The Heathkit SB-220 draws about 15 amps set to 120vac mains. But that isn't going to happen much, everything else will be receivers and will much draw much less then 10 amps. Go for broke or get what I will actually use. I have always used the light bulb inline for the first start up procedure in the past I figure time to get fancy.