04-04-2017, 08:15 AM
Yes, I agree with Arran that there is a problem in the 6R7 circuit. Double check that resistor 20 is around 190K, and there is full B+ voltage on one side of it.
The 6R7 tube could also be bad. This tube operates with bias derived from the AVC circuit, so the voltage on the plate should change as you tune in a strong station and you vary the volume control. The plate voltage should rise with the strength of the received signal and increasing volume control setting.
The 6R7 tube could also be bad. This tube operates with bias derived from the AVC circuit, so the voltage on the plate should change as you tune in a strong station and you vary the volume control. The plate voltage should rise with the strength of the received signal and increasing volume control setting.
