On 9/29/20 10:00 AM, Mark - N5OT wrote:
Back when I would model stuff all the time (K6STI's YO) I just put in
the swaged parts as separate segments that were the correct diameter and
length as the swaged parts. That does not really compensate for the tiny
bit of transition from larger to smaller, but my segments were chosen
arbitrarily to be halfway through that tiny bit of transition (i.e. the
combined lengths added up to the actual phisical length of the HyGain
part I was modeling. I figured no matter how inaccurate my method was,
but does the model actually show much difference? One can get way down
in the weeds with this - put a tapered segment in that's 1 cm long, etc.
But if the wavelength is 20 meters, a 1 cm transition is 0.0005
wavelength. I'd worry more about numerical instability than model
accuracy at that point.
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