restoring modified twin reverb w/master vol

8/17/2000 1:26 PM

Paul

restoring modified twin reverb w/master vol A friend has a Fender twin reverb with   master volume and hum balance. It had been   modified and he wants it demotified to   original circuit. The amp has 7 preamp   tubes and the 4 6L6's. I can not find   a schematic for this 135 watt amp that   includes that extra preamp tube. Is   that part of the modification? The hum   balance is connected to this tube.