Would anyone know if the Diamond X50 VHF/UHF base antenna needs to grounded in order to perform properly?. The reason I am asking is I have this antenna in the corner of the attic and run a Icom 2200H into it. This setup appears to work fine and I always get good reports but I was told that this antenna needs to be grounded otherwise the SWR could be to high and damage the radio. I am somewhat skeptical in accepting this as the antenna has a ground plane but just wanted some advise whether grounding is needed or not.
Thanks
Thanks