Time to get this site upgraded, so we are passing the hat around. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html
We appreciate your help
in keeping this site going.
Disconnect the B+ from the pin 8 of the 5U4 rectifiers then measure from B+ to center tap and to ground. Measure from pin 8 to center tap and to ground.
Threaded Mode