On 4/26/19 2:33 PM, Michael Tope wrote:
It might be worthwhile to model part of the geometry (the smallest
triangle or square in the structure formed by the legs and braces of the
tower) and then move it around in Z (up and down vertically) and X
(along the boom axis) to see how much it distorts the pattern and how
much current get induced in that basic geometric element. If that in and
of itself creates a lot of distortion, then you may be in for a
difficult time. I suspect, however, it will just be a minor blip. If the
latter is true, then I would scale up the size of that basic element to
see how big it has to be before it creates any significant distortion in
the yagi pattern. That may provide a sense of how much margin you have.
Thirty inches is not even the length of a 2 meter Yagi element, so I
suspect it is going to take a much larger cross section to cause trouble.
You could start there and work your way up to a more detailed model of
the tower.
73, Mike W4EF............
That's a decent strategy, Mike.
if a flat 30" (or whatever) triangle in between the elements at a
notional location doesn't have a marked effect, then the tower probably
won't.
That's only 3 segments to add to a model so it's pretty fast.
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