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Re: [TowerTalk] Water tower omni

Subject: Re: [TowerTalk] Water tower omni
From: Roger D Johnson <>
Date: Mon, 03 Jul 2006 21:47:26 -0400
List-post: <>
Nick Pair wrote:
> 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 

I agree that this seems to be the simplest solution. If lightning
takes out this array, then I'd think about the Yagis mounted
around the tower at a lower level.

73, Roger

Remember the USS Liberty (AGTR-5)

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