Tube Amp Archive

A wood chasis was a terrible idea for grounding. I basically used star grounding and ran the outlet ground to the 2 star grounds. let me know if you want any specific close ups.

Attached is my PT. The 2 green wires go to the tubes and the green/yellow is grounded. Do i need to ground the green wires through 100ohm resistors too? Also- would it make a difference if the 2 green wires were reversed?

I made a diy 5f6a bassman from scratch and it sounds fine except for a loud, low pitched hum. It starts as soon as i flip the standby switch and is unaffected by volume controls (even when volume is off). I'm thinking it might be from switching the leads on the OT. I'm using a classic tone 40-18001 ...