This circuit is for my 50 Amplifier. You guys can thank Pixelplay for drawing this. Zenelectro is also responsible for some of the circuit, it''s the best soundÃng amp i have heard, Magical indeed, but it is more than just the circuit, it's the wire, choice of parts, and then years of tuning. I do not run 400V into the rectifier, mine is around 300v at the Valve. I dont push the UX250 valves to run hard. Mine has about 2 to 2/5 watts, but with 450 volts you can get 4.6 watts. If you plush them they will not last as long, and can sound stressed, The circuit picture was not right, i will resubmit the correct revised picture soon