Rick , ever try a jumper cable grounded to the base of your antenna & dropped in the water ? I had a 63' Ford Econoline Van , use to park on a boat ramp ( off season ) & clip a jumper to my van & drop the other end in the bay . It made a difference . IMO
Had a friend years ago did the same thing from his Charger, Battery Charger clamp onRick , ever try a jumper cable grounded to the base of your antenna & dropped in the water ? I had a 63' Ford Econoline Van , use to park on a boat ramp ( off season ) & clip a jumper to my van & drop the other end in the bay . It made a difference . IMO