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Re: [TowerTalk] Measuring resonance of a yagi element

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Measuring resonance of a yagi element
From: john@kk9a.com
Date: Thu, 23 Apr 2020 12:16:02 -0500
List-post: <mailto:towertalk@contesting.com>
I use insulated elements (DX Engineering element brackets) and avoid short sections in my EZNEC models. The Yagi SWR curves basically match and I trust the model. Modeling is certainly quicker and better than the old cut and try method. AutoEZ is a great tool for quickly optimizing EZNEC files.

John KK9A



Jeff Blaine AC0C wrote:


When I see this thread, it brings back memories.  Doing this accurately
is far more difficult than one would think.  If you come away with a
"how hard can it be" - then you are probably not considering the
infinity of error sources.

My solution?  Cut the element and measure it in place where it would be
used.

Impossible?  then trust the model.  If you are building a beam with
insulated elements and no traps, assuming the model matches the build
otherwise, it will probably be "close enough."

Good luck and have fun!

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com


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