Hello..I am getting hum only in the AM position and it goes up and down with
the volume control.
I replaced the caps in the high voltage section but not in the 12 volt supply
as they are hard to get at and since I do not hear the hum on SSB I am
assuming, maybe incorrectly, that they are ok.
The hum sounds like about 400 cycles, not as low as 60 cycles. Voltages in the
set look good, and the receiver works good otherwise although I am sure it
needs some peaking up in the alignment.
I am waiting for a set of tubes in case one of them has developed the hum but
again since I do not hear it on SSB maybe a tube is not at fault.
Any suggestions would be very much appreciated. Thanks..Cliff
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