KEL84 noise in left channel

[Riggers]

Hi
I would second Snowman’s advice re poor solder joints. I had an infuriating noise in my WD88 similar to what you described which in the end was a poor solder joint that to the naked eye looked fine. Use a wooden chopstick when powered up to carefully prod joints or alternatively when NOT powered up pull at any wire to pcb or solder tag connections and check for looseness.

Worse case remelt all solder connections.

Cheers
Phil.