28-11-2017, 12:43 PM
OK, got that, the Cathode/filament bias is to both sides of the AC filament, sensible. And hum reduction by taking a mid point for the bias which is standard.
Re the capacitor pack, if it is a standard part then that would explain the odd use of C12 and C13 but how did they get away with C12 being only 100v? Surely the main HT is more than that?
The AC064 would seem to be an odd valve, very little used. There is comment about its hum reduced property. You are lucky it is still there, could you ever find another one? Shame its not a PX4.
Re the capacitor pack, if it is a standard part then that would explain the odd use of C12 and C13 but how did they get away with C12 being only 100v? Surely the main HT is more than that?
The AC064 would seem to be an odd valve, very little used. There is comment about its hum reduced property. You are lucky it is still there, could you ever find another one? Shame its not a PX4.
Boater Sam.
