Hello to all, In this thread we'll be discussing some technical and electronic stuff. For starters this will be my summer vacation project. A combination of the svt cl and a 4 el34 power section. Hopefully for a 100w trough a single 15 inch eminence speaker. Now, the pre is no big deal. Just finished a Marshall plexi pre for a friend and it turned out grate. For the output stage I figured I'd just use the jcm800 schematic. Now, what modifications should be done to the pi and driver tubes of the svt to be compatible to the el34s? The output tranny has yet to be wound as is the case with the power transformer. And a bias knob for every tube. Will that require an extra tube? Hope it is posible to make one. PS The cost won't be to big? For the pre it was mostly tubes and cosmetics.