I agree with Bob. Mixing could also occur down at the guy anchor area, where cables are woven through the turnbuckles. Had it happen here...
Laryn K8TVZ > > The cause of your interference problem is not RX "overload". It is as > others have suggested: a mix occurring somewhere in the near field of the > antenna. Pads may eventually mask the real source of the problem, once > you've added enough to drop the signal below your RX's noise floor, but > you'll end up with a deaf repeater. > > How far away were the separate TX & RX antennas when you tried that? I'd > think if they were far enough apart that you would lose the mix. OTOH if a > tower joint is the source of the mix (likely since a lot of length is > required to couple in the AM BC station), it might be all over the tower. > > A similar problem was partially cured here by spraying some conductive > paint into all the tower joints. Each time it was done the interference > would disappear for a few months, then return. > > Bob NO6B >

