I recently completed a 310A+300B Amp. The schematics is attached. After assembly, I first used Russian's 310A equivalent 10*12C for test. The voltage at various nodes are shown.
I am concerned with the plate of 10*12C is only about 90V now (I was originally thinking it should be around 190V). Apparently the plate current is larger than I had expected as 2.8mA instead of 2mA.
The Amp still produce good sound. What should I do? Should I adjust the screen voltage down to 100V or 90V? Will that help to make the plate back to above 150V? Or should I reduce the plate load resistor?
Thanks for your suggestions and comments.
I am concerned with the plate of 10*12C is only about 90V now (I was originally thinking it should be around 190V). Apparently the plate current is larger than I had expected as 2.8mA instead of 2mA.
The Amp still produce good sound. What should I do? Should I adjust the screen voltage down to 100V or 90V? Will that help to make the plate back to above 150V? Or should I reduce the plate load resistor?
Thanks for your suggestions and comments.