490v to 400v dual tap no sound!
Posted: Mon Apr 16, 2012 11:03 pm
I have a 2203 metro kit with the MM MP100-460 POWER TRANSFORMER with optional 400v taps. I hooked them (the 2 brown wires) to the appropriate tabs on the standby switch, but get no sound when powered on. I assume something needs to be changed in the bias circuit. I currently am running 6550 power tubes. Amp works fine on the normal 490v taps. Any help is appreciated 