I struggled quite a bit at first with NEC, the 80 column input format and trying to figure out what parameters affected others. The ground (GN) card was a trick in itself. Once I figured some of it out, it became pretty simple. Note, I am using a UNIX/Linux version which requires manual creation of the input file (deck). There is EZNEC for Windoze users which provides a graphical front end.
I'm hoping these pages will make it easier for someone else to start out with NEC.
Example input file.
Example input file parameters explained.
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