[TowerTalk] Modeling a Yagi in EZNec

[Wes]

Since the leads are (ideally) non-radiating, I would call them a transmission 
line.  If you try to include them, then you run into stepped diameter issues, 
etc. On the whole, if this is HF and not VHF/UHF, I think you are overthinking it.

My 2 cents

On 5/29/2024 8:27 AM, Tom Hellem wrote:
> Those who use NEC to model a yagi, do you include the lead lengths in the
> model for the connecting wires that go from the balun to the feed terminals
> of the driven element?
> If so, do you model them as part of the element itself or as a transmission
> line?
> My leads are 4" long. So if I model them as part of the element, I would
> just describe the center portion of the element to be an 8" piece of say,
> #12 wire, then the next portion of the element would contain the correction
> for the element to boom clamps.
> Do I have this right or am I overthinking it?
> My goal is to get the model perfected to the point that when I actually
> build the beam, I will not have to make adjustments in the lengths of the
> driven elements to bring them to resonance.
> Maybe that's an unreasonable expectation, or not?
>
> Any input appreciated.
>
> Tom Hellem
> K0SN
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