No I haven't tried that becouse I didn't think that it would make much difference, but maybe it will. I'm O.K. with the reception, but I think that it can be better becouse of the type of antenna, height of the antenna, the LMR-400, and I have no restrictions nearby. I think that a preamp will help me out since the set-up that I have is pretty good besides the "T" and the axtra connectors. I will be honost and admit that I haven't been in the game long so any suggestions will be appreciated.