Needing advice on a swr problem I’m having. I’ve got 18 foot shielded coax that’s brand new and I’m getting above 3 on channel 1 and around 2.5 on 40. I’ve tried a 102 whip, 48 inch k40 and a 36 half breed. All with around the same results. Even tried with different coax. I have the mounting bracket grounded to the frame with a 10 guage wire. What am I missing here? I’m using just a galaxy 44 barefoot. No kicker