Frank wrote:
Now I understand the confusion. I am not using EZNEC, and am not familiar
with the program. . .

You can download a free demo version of EZNEC from http://eznec.com.
It's perfectly adequate for analysis of simple antennas with lumped
loads, and gives you full graphics, the ability to fix the power level,
and all the other features of the full EZNEC program with the single
exception of a 20 segment limit.

The demo version also includes the full EZNEC/EZNEC+/EZNEC pro manual,
and there's no time limit on its use.

Roy Lewallen, W7EL