🚀 go-pugleaf

I would recommend MINEC. It can handle just about any antenna,
from a 1/4 wave to a 12 element yagi. I do not know exactly 
where to find a PD version, I recommend asking over in rec.ham-radio.

I have sources for the ATARI STe/TT but you probably want them for 
some other, less user friendly system, like a PC or a MAC. :^)

Brian, WS1S
Bell Northern Research
Research Triangle Park, NC
bjgrier@bnr.ca