Antenna won't handle the power!! Bottom line. Get some N-male connectors or even Din Male connectors and upgrade the antenna itself. This is just what it sounds like to me. These antennas are over rated as far as power goes IMO, and I have seen a couple burn out with less power. With the power you're running why not look into something like a shockwave antenna?? Much better antenna and will handle the power you are using no problemo!! Again, JMHO. Good day.