Does anyone know of an anti feedback module for this radio? I have a Give em hell echo box with a 20 second recorder in it. I do not use the echo feature but like the recorder. The only problem is that whenever I key the mic I get a loud squeal. I tried turning everything down or even off to no avail. I just bought the radio and really like the features as well as the performance but I would also like to be able to use the toy box. Any suggestions:bdh:?