So I recently aquired a Fender 75 tube amp. At the beginning it worked fine, some noise though but i thought that it was some of the caps or heaters that was acting up. So I put it on the bench and all hell breaks loose! The filter caps has been changed but the old electrolytics inside was still there. I changed those and the coupling caps aswell. I re-soldered the heaters which was needed. The resistors on the output tube sockets was original, so i changed those aswell. The only mod i have done is getting rid of the hum balance pot and placed two 100 ohm resistors on the pilot light. The hum balance seemed shot anyways. But... Now the amp blows fuses. The fuses that was is the amp when i got it was waaay to high.. Like 10A fuses. So I changed those to the correct value. (I did this before i put it on the bench) There is one 3A slow fuse directly after the on/off switch and two 500mA slow right before the rectifier. (the two 500mA fuses is not on the schematic, but i live in Sweden so I suspect it may have been added when the amp was imported. I've looked at others that has these fuses aswell.) I used a variac, turning the voltages up slowly and monitored the voltages inside the amp. When the variac is at 168VAC i reach the correct voltage meashurements inside of the amp. However we have 220VAC in the wall here. I have made shure that the correct primary lead is hooked up on the PT. Something is drawing way to much current and I can not for the life of me find out what..... I've got no tubes in the amp. I've tried with known good tubes aswell but to the same result. I have taken meashurements on the OT and those seem fine... Does anyone have an idea of what I am missing?? Any help at all would be very much appreciated! I attached the schematic.