I have an iMax 2000 mounted on PVC 20' in the air.. It is secured against the eve of the house and the base of the antenna is 4' above the roof line. I am using RG-8/U (78'). My problem is that I can't get the SWR down below 1.5 on all channels. Using modified SR-655HPC Stryker radio.

Anyone got any ideas about what I can do to get the SWR lower. Maybe ground the antenna or put on the ground plane kit??

Thanks in advance - 73 to all