Ed, I was in the same situation and found a very nice Ten Tec Centaur amp. Runs QSK beautifully and puts out about 500w. I put in 572B tubes for the 811A's. Runs quite well on 110v. Only drawback is the noise of the fan. There are several approaches to quieting it down. I've only tried one since I fire it up seldom. Gary W7TEA