09-29-2014, 02:00 PM
Frank, how much AVC voltage are you developing on a strong signal? You should have -10 to -15 volts of AVC, which will make the shadow meter deflect and narrow appreciably. Anything which reduces the overall gain of the receiver will affect the amount of AVC generated, which in turn will affect the shadow meter operation.
The meter really indicates the plate current of the AVC controlled tubes, which is reduced as the AVC voltage becomes more negative.
The meter really indicates the plate current of the AVC controlled tubes, which is reduced as the AVC voltage becomes more negative.
