Well here we go, another 5E3 I need help thread. Sorry. This is my second amp build (first was a 5F11). Followed @robrob 's startup procedure and everything went well. Voltages are all pretty close to those on his layout drawing on his website. I haven't plugged in a guitar yet, but with the amp on and the volumes all the way down it hums pretty loud. It takes a bit of time for the hum to build up (gradually gets louder, almost like charging up). Turning either of the two volume pots up seems to have no effect on the hum until you hit about 80% then it switches from hum to a light scratchy/fizzy noise. I read some threads on this forum and have tried moving around wires and making sure all the preamp wires are separate from one another and separate from the heater wires. I removed V1 and it was a bit louder hum maybe? I removed V2 and it seemed to take longer for the hum to build up but it was just as loud once it did. I used the modified mojotone layout attached expect I have not run any wires to the mute switch yet so you can ignore that. The only mods really are just bleader resistor for filter caps, backup rectifier diodes, and screen resistors. Any help would be appreciated. UPDATE: Plugged my guitar in. Sounds normal playing the guitar. Wow this thing has some sweet overdrive with a humbucker bpup. Perfect China Grove sound. Noticed my pilot light is blinking on and off so that's not good. Must have a bad connection to that. The hum doesn't seem very loud with the guitar plugged in, especially compared to playing volume so maybe I don't need to worry about it for now. But I do need to fix the pilot light wiring. Something is wrong there.