Antennas, Antennas, Antennas are a funny bread. Wilson is a ham radio operator. Antennas don't like metal, don't like to be mounted lower the the metal cab, fiberglass, I don't know. Had a friend mounted on the right front fender and asked me to check the SWR's, they were high, I tied a string to the antenna, he keyed the radio, I pulled the antenna away from the fender and the SWR's went down. Antennas don't like being mounted next to metal as on the rail of a truck bed next to the cab.