02-05-2014, 12:33 AM
Jerry, If the 84 has a heater to cathode short ( actually quite a common failure), it will provide a path for B+
to ground, which will have to return to the transformer through the bias resistor.
Removing the 84 just eliminates that possibility as the cause of overheating.
to ground, which will have to return to the transformer through the bias resistor.
Removing the 84 just eliminates that possibility as the cause of overheating.