I've noticed that on my brand new LA-1K amplifier it sends out a rather husky birdy on 20 meters and possibly other bands.? It actually runs up and down the band.? I verified that it was caused by the amp by turning it off and it disappeared.? I read that this was an issue when the amp was operating on 120VAC but when the person hooked it up to 240VAC the birdy disappeared but obviously not in my case.? I attached ferrite cores on all the cords and cables but didn't even reduce the level of the birdy much less remove the issue.? It most likely is getting back into the radio via the coax cable center conductor.? Has anyone else have this problem and made it go away?? Thanks for reading.
John? N1JP
