This is a very nice amp and should NOT be turned on without a variac. I had one, enjoyed it very much and is worth having a tech go though it. A parts unit recently sold on eBay for $250.00 and a nice one $995.00. I suggest you buy it and contact Pat @ Classic Tube Audio for a checkup and cap replacement. I think I paid $180.00 or so for his services, well worth it.
http://classictubeaudio.com/
http://classictubeaudio.com/