ORIGINAL MESSAGE:
On Mon, 30 Apr 2007 16:55:57 -0400, "Joe Subich, W4TV"
<w4tv@subich.com> wrote:
>The only concern I would have is if you are shunt feeding the tower
>with that antenna. All elements on the X7 appear to be insulated.
>This makes the only connection to any elements through the balun via
>the shield of the "triband" feedline. I've seen reports of the
>Cushcraft balun failing under those conditions (perhaps at VE6WZ -
>I can't find it any more).
>
>If you shunt feed the tower, it may be wise to ground the center
>of the reflector and director (elements 1 and 7) simply to provide
>enough of a top hat that current is not forced through the balun
>to the log cell.
------------ REPLY FOLLOWS ------------
Good point, thanks. No, I'm not shunt feeding and don't plan to but I
will keep it in mind if I ever do. Depending on frequency and height
of tower I can see where there could be some extremely high voltage at
the top.
73, Bill W6WRT
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