Jerry wrote:
I'd like to know more about any data anyone has that shows
where EZNEC gives wrong data.

Here's one where all the geometry and segmentation checks
are OK but the conductors are too close together. It results
in an omnidirectional antenna with a 24 dBi gain.

http://www.w5dxp.com/SUPRGAIN.EZ
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73, Cecil http://www.w5dxp.com