When i I plug in my coax I get 9 pound plus of static could this be down to bad coax and what would b the best replacement.

First of all,your radio should not even be on when you plug in your coax.second , what time of day is it? Third ,it could be bad coax. the coax you need should be 95% shielded or better and the dielectric should be and the plastic outer cover marked with type " IIA" this coax has a life time of 20 years. It is the best you can get.Is your radio a mobil or a base? A base could be picking up flouresent light energy and your car radio could also .If your car radio is hooked up to a cigarette lighter plug you can pick up extra noise that way.Try going directly to the fuse panel. It could be just a minor adjustment to the RF gain section or the Squelch section.You will need a tech.