Hi all I want to put a bracket on the side of my tower to mount something like a Comet GP-6 or Diamond X500, how far should a antenna like this be away from the tower to minimize interference from the tower, a wave length or more? Or will I waste my time installing a antenna like this next to a big chunk of steel, must it actually be clear of most things to radiate properly? I can't put it right at the top hence the side mount, I have a hex beam which goes right at the top, this might change in future when I get a nice big triband yagi to replace the hex beam. I currently have a Comet GP-1 which I use as my general repeater and simplex antenna, but I'll be moving out of the city much further from the closest repeaters, so I'll need a bit more punch. I do have horizontal VHF and UHF yagi's for working long distance, but at this stage I don't want to get another yagi just for vertical work.