No subject

Class A at 250 VDC plate and screen volts and about 30 mA plate current.

Grid bias at this point should be about -12 VDC.

Calculating what the cathode bias resistor should be under these conditions 
gives a value for that of about 420 ohms or so.

Yet the receivers normally have a 1500 ohm resistor as cathode bias for 
about 300 mW output. I read in a maintenance manual that ARC changed 
the cathode bias resistor to 1000 ohms to provide 400 mW output in some 
receivers.

Measuring the grid bias on the 12A6 as it now is, I read about -14 VDC.

In our use, considering only hacked receivers, could one change the 
cathode-bias resistor to 500 ohms 3 W and by that means achieve greater 
audio sensistivity?

Kenneth G. Gordon W7EKB

"Courage is being scared to death but saddling up anyway."--- John   Wayne