Re: NEC-LIST: Average gain test and diagnosing the source of the problem

Scott Townley wrote:
 
> Wire grid modelling is certainly tricky.
> Really the #1 and #2 error sources are just the modelling rules
> --segment length to diameter, etc. Watch the bends.
> A big gotcha is a bend with short segments where the centers of the
> segments lie in the coincident (overlapping) bend area.
> The equal-area rule works ok; my experience has been that box-y models
> work ok at about 1/2 the rule. Can't comment on curved surfaces.
> I triangulated a working model once and found it to be more effort than
> the results justified.
> Might I suggest a rules-checker...the ancient "NecDraw" by Bob Just

Without willing to push someone towards things, I could also suggest a free
rules-checker. 4nec2 does include both a number of geometry- and
segment-checks. Including one that does check on sharp angles, parallel
segmentation and more. Furthermore the build.exe program can create geometry
structures taking into account the equal-area rule, even if these structures
are none-symmetrical. (http://home.ict.nl/~arivoors/)

Arie.

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