I have enjoyed my Cornet 2 for a couple years now and it has been very quiet regarding hum and noise.
Friday night I noticed a 60 hz hum out of both channels, the right slightly louder. It isn't real loud but it is noticeable with no music playing.
I have several sets of tubes and swapped them in, including another Bendix 6106, but the hum remained.
When I turn off the Cornet 2, the downstream electronics are dead quiet, same situation when I select another input on my preamp. Unplugging the turntable power supply has no effect.