just an update......it turned out to be the 6sk7 tube i had to order one and just got it in today
plugged it in and no more noise
thanks ron for your time.....

with the input unplugged and the avc on yes it makes the noise
with the input unplugged and the avc off no noise

well i checked the ground on the mech it was tight but i cleaned it anyways but on the one mech plug in harness it was wrapped with electrical tape so i up wrapped it to find the wires twist together i tugged on the ground and it just pulled apart and i said to myself "there it is" :D so i...

the amp is a MRA4-L6
i might add that it doesn't always do it
everything else works fine just that loud noise and the beginning of record play

Hello everybody!! i was wondering if any one had any ideals as to what would cause this noise
i figured it would be easier to show you guys instead of trying to explain it http://www.youtube.com/watch?v=TBk28yf6u_Y
amp has been recapped and has new tubes