wrote in :

Look at this for an overview of NEC.

http://en.wikipedia.org/wiki/Numeric...magnetics_Code

At the bottom under External links you will find both free and commercial
implementations.

EZNEC by W7EL is popular among hams and has a free demo version that is
fully functional but limited in how complex a model you can generate.

NEC itself just crunches and produces numbers, but there are several
versions, including EZNEC, which have graphical interfaces to make
it easier to build the model and view the results.

I've used EZNEC+ for years.



Thanks again, I'll use that if it runs on W98. (Long story, but I decided to
stay with it for too many reasons not to do so). Graphic representations will
help me a lot. (There is a tool for laser beam optics that used graphical
feedback of inputs to demonstrate predictions, if it's anything like that one
it will be indispensible).