hey-Hey!!!, The schematic for the PP 2A3 amp is done. Galahad is its name. It employs a Schmitt inverter front end pair of 12BY7 pentodes with neutralizing caps for the 2A3 finals.
The 10k load gives a -3dB point of ~23 kHz w/o neutralization. With the caps in place to eliminate the effects of Miller on the grid-anode capacitance, it should run to the limits of the output Iron.
To ensure Class A operation, I suggest the uprated 2A3's from Russia. They will also make a little bit more power. This amp ought to do 7W quite well. cheers, Douglas
Posting Rules
Members
Search
Help
Register
Login
Get a T-Shirt!
