This is what I have Turner JMU + 2 mic , Cobra 140 GTL an a King Bee 250 ( I think made by Palomar ) when I key the mic on AM only it squeals through my speaker unless I turn it down two 1 which kind if defeats the purpose of having the mic .Why doesn't it do it on SSB ? It doesn't do it with the stock mic , any thought's ? I have not tried changing the patch cord yet but that is new . Thanks !