I built a JTM45 copy. It's a great amp with Mustard caps, Piher resistors and very nice transformers from IGPW Germany. There are no problems with the amp, it doesn't hum or hiss, all is perfect and it sounds heavenly! My problem is that the wall voltage in my house is little "over the top". The "standard" is 230V (I'm from Europe...), but I have 240-245V. The HV from PT's secondary should be 350-360V, but I have 370-380V. There is a plate voltage of 475V with KT66s and 520V with EL34B. One of the big elyts is rated as a 500V cap, but it runs at 520V with those EL34B! My voltage for heaters is nearly 7 volts! Is it safe? Is it still "ok" for the "sound"? I can use a different PT's primary tap and wire the amp for 240V, but then the amp could run too "cold" at other place, because there is only about 210-215V in some clubs etc. And I have other amps too, so they might suffer too (on the other hand I have no problems with my amps and I've been living for 3 years in my house...) What would you do? Thanks!