The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

I have a Predator 10k antenna mounted (Breedlove mount) to the front bed rail of my Ford F250 pickup. Cannot get it tuned below the red; always above 3, on all channels. Continuity tests are ok. Using Galaxy 959 radio, tuned. Any recommendations? How can I be certain the antenna mount is grounded? I...