[TowerTalk] ez nec help

[jimlux]

On 5/3/20 12:09 PM, Dan Maguire wrote:
> On 5/3/20 9:28 AM, john nistico wrote:
>>>> I modeled a 2 element 20 meter wire beam on a 10 ft boom.
> 
> You might try opening EZNEC sample model 20M5ELYA.ez.  That's a
> typical 5-element 20m beam with stepped diameter tubing.  (EZNEC uses
> "stepped diameter" for telescoping aluminum tubes because "tapered
> segments" has a different meaning.)

Excellent point - tapered means "conical section" (i.e. smoothly varying 
radius), and most antennas are actually stepped.

In all the NEC engines, there's no problem connecting a "wire" with 
radius X to a wire with radius Y, especially if they're in a straight 
line, and the segment length isn't less than the diameter.


> 
> You could delete wires 23-55 and you'd be left with 2 elements on a 6
> foot boom.  Then start experimenting from there.
> 
> Dan, AC6LA
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