[TowerTalk] Water tower omni

[Nick Pair]

I vote for the 4 pole folded dipole with the dipoles spaced 90 deg.around a mast horizontally and phasing harness distance vertically. The commercial type where the dipoles are welded to arm on half opposite feed point. They have survived many a strike in commercial installations. You would want to use discharge devices above them on support mast and have everything well bonded together and to lightning down wire to whatever ground is present at tower base. There should be a grid if this is a community water system and access to this is important. The individual patterns on these are great enough that you get pretty good omni out of a set of four. Use factory spacing from support for best omni.
  Also if you can run the feed line horizontally from the support pole base through a grounded run of metal conduit just big enough to accommodate the coax will choke the large current surge down to a less than melt down level. About 20 feet will do it.
  That's my $.02 worth anyway, 
   
  Nick WB7PEK 

 				
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