08-25-2012, 04:52 PM
Thanks, but I still don't get it. There should be NO current flowing through resistor 34, since the 1H4 driver is operating in class A. So the grid voltage on the 1H4 should be -9 volts (it will be less if measured by a DVM or VTVM since even a 10meg input resistance will pull it down). I don't see how resistor 40 would affect that voltage in any way (other than running down the battery prematurely!)
