[TowerTalk] MODEL FOR TOWER

[jimlux]

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.