Hello all, I have a problem with RF feedback on 20, 40, and 80 meters. If I run my AL-811H, I get RF feedback on those bands. Nothing on 10 & 15. Everything is grounded very well, but it is still there. Any ideas? Particulars: Kenwood TS 570D Gap Titan DX Vertical Ameritron AL-811H Heil Pro-set Plus head phones & boom mic Thanks, Pat WW9R