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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