Re: [TowerTalk] DXE Yagi Mechanical

[Dan Maguire via TowerTalk <towertalk@contesting.com>]

Jim VE7RF wrote:
>>> The question I have is.... the Resonant freq that YM spits out for each 
>>> ele, is it close to what AutoEZ spits out ?   If not, is the YM resonant 
>>> freq a bit high..or low..and typ by how much ?

If the element is modeled in Free Space the Fres calculated by YM, by the NEC-2 
engine using the stepped diameter (Leeson) correction, or by the NEC-4 engine 
are all withing a few tens of kHz.  The NEC results will vary a bit depending 
on the segmentation density used.

However, if the element is modeled over real ground at realistic heights ... 
well, we've been down that road before.  See

http://lists.contesting.com/_towertalk/2016-05/msg00555.html

http://lists.contesting.com/_towertalk/2016-05/msg00583.html

http://lists.contesting.com/_towertalk/2016-05/msg00609.html

http://lists.contesting.com/_towertalk/2016-06/msg00054.html

along with a few dozen other posts on the same subject.

Dan, AC6LA
http://ac6la.com/
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