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[TowerTalk] Need help getting started with antenna modeling

To: towertalk@contesting.com
Subject: [TowerTalk] Need help getting started with antenna modeling
From: Kevin Zembower via TowerTalk <towertalk@contesting.com>
Reply-to: Kevin Zembower <kzembower@verizon.net>
Date: Mon, 13 Jul 2020 11:43:02 -0400
List-post: <mailto:towertalk@contesting.com>
Hello, all,

I'm just beginning to learn how to do antenna modeling. I'm a Linux user and using xnec2c version 3.6.1-beta. My first attempt was to model a 40m dipole in free space. The visualizations don't show anything like the double-torus images I've seen in books. Other calculations, such as VSWR from 7.0-7.3MHz also seem wildly off.

I've been searching around trying to find a good email list to post my beginner questions, but have been unsuccessful. I can't find an email list for xnec2c, I'm guessing because its user base is much smaller than EZNEC or others. I'm not sure that my problems come from, a) unfamiliarity with the xnec2c interface and program, or b) not understanding NEC2 cards and procedures, or c) lack of knowledge about the topic of antenna modeling itself. I thought I found one email list on NEC2, at http://www.gweep.ca/mailman/listinfo.cgi/nec-list from the page nec2.org, but it seems to be defunct.

Can anyone suggest a forum to post my beginning problems and questions? Is TowerTalk an appropriate place, or would it be too off-topic? Are there any other NEC or antenna-modeling email lists or forums?

Thanks for your advice and suggestions. I appreciate your help.

-Kevin
KC3KZ
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