By the way, the Ultravalve came plug and play. Frank and his merry men have designed a very special carton to get the amp to your house in one nice and shinny piece, with tubes on board. This is accomplished with 2 custom designed inserts to snug the transformers and put a very slight and captivating amount of "hold power" on the tubes. It's just a fantastic product! Of course, I'm biased, Fit and finish are first class.
It only took a few minutes to plug in the amp, set the initial bias to 1.6VDC (with no input), rechecking after about 15 minutes, and then it was rock and roll.
Wayner