12-04-2017, 12:00 PM
Plate voltages are measured at 346v on both tubes. I replaced a single 15Watt? wound cathode bias resistor and cap to ground with a 10Watt resistor and cap on EACH 6V6 cathode to ground. I forget the cap value (I dont have my notes with me), but I duplicated what was there. My workbench has a dismantled guitar on it at the moment, but I will get back to the Ampeg to plot my power dissipation and plate currents when that is off the bench....waiting for parts.
I get lots of sound at volume setting 2-3, so maybe increasing the bias resistors would not hurt. Also, I am pretty certain that the speaker is original. I might shop around for a nice recone kit or a replacement.
Larry
I get lots of sound at volume setting 2-3, so maybe increasing the bias resistors would not hurt. Also, I am pretty certain that the speaker is original. I might shop around for a nice recone kit or a replacement.
Larry