I've built six tube amps, four of which started their lives as crappy solid state amps i got for nothing. It's absolutely killing me that I have three low voltage power transformers kicking around with no project for them. One is a approx 150kva 120 x 50vac 2wire secondary from a peavey 100w head. Every solid state schematic shows a 3 wire secondary, ie. +50v, -50v with a center tap. Can I create an artificial center tap on the 2 wire secondary to give me +25, -25 and a reference of 0 volts? Is it safe? I'm really digging some of the rickenbacher ss amps and would love to build. I also have two power transformers with various taps 24v 36v 50v and 6v... I can see using the 6v for a heater on a 12ax7 preamp, but the other voltages are probably too low for a tube pre. Any ideas, or existing circuits for me to play with using these pt's? Am I crazy, and should scrap these and build an ac30 instead?