[TowerTalk] One of our own...

Joe Subich, W4TV lists at subich.com
Thu May 26 12:58:44 EDT 2016


On 5/26/2016 12:31 PM, Jim Thomson wrote:
> ## Instead of feeding in the lower corner, if you really wanted 100%
>  true vert radiation, then feed it part way up on one side. I believe
>  it had to be fed 1/3 the way up one side of the loop. Then route
> the coax straight across from the elevated feedpoint....to the
> tower, then down the tower to shack.

That depends on the aspect ratio of the loop.  The correct feed point
for maximum vertical polarization is 1/4 wave down from the apex.  If
you have a true equilateral triangle, the feedpoint will be 1/3 of the
way up from the corner ... if the loop is "flatter" (lower tower) the
feedpoint will be farther from the corner.

73,

    ... Joe, W4TV



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