Using the EZNEC ARRL version that comes in the ARRL Antenna book, I attempted to create a simple model of the antenna as it’s currently set up.
Using a tape measure and some very rough estimating, I came up with this plot of how the antenna is set up, without the ladder line in the middle (haven’t figured out how to add the feed line yet).
![EZNRC antenna diagram](http://blog.ab4ug.net/images/HamRadio/AntennaDiagram.png)
![EZNRC antenna diagram XY](http://blog.ab4ug.net/images/HamRadio/AntennaDiagram_XY.png)
The far field plots EZNEC gives me look like this
80m
![EZNEC far field plot 80m](http://blog.ab4ug.net/images/HamRadio/AntennaFF_80m.png)
40m
![EZNEC far field plot 40m](http://blog.ab4ug.net/images/HamRadio/AntennaFF_40m.png)
20m
![EZNEC far field plot 20m](http://blog.ab4ug.net/images/HamRadio/AntennaFF_20m.png)
10m
![EZNEC far field plot 10m](http://blog.ab4ug.net/images/HamRadio/AntennaFF_10m.png)
The antenna model is pretty simple and nowhere near perfect. I’m probably missing a lot by not having the feed line included. Based on these rough simulations though, it looks like I’m warming a lot of clouds (ham speak for when your antenna is sending radiation mostly straight up).
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