[W5ALS]

Alright i found were the hum is coming from, this is the first on me in 25 years. If you look at the pictures the top tube has 2 yellow caps hook to it. to the left the is a small metal plate covering the 7B7 tube, that plate was the problem take plate
out hum go's away put plate back in hum comes back and the plate was touching nothing. Strange!!!!!!
alton w5als