dansawyeror wrote:
Roy,

Thanks, I did and I have tried all the combinations.

I would suspect that 'free space' would show a mis match for 'short
radials'. It does not. Simulations of free space dipoles seem accurate.
Am I missing something?

You'll need to send me the model description (.EZ file) so I can see
what you've got. Attach it to an email to me.

I also tried to simulate several values of real earth. None of them
produced high input impedance values. What ground values represent
suburban clay?

We have clay here, and by comparing a dipole and vertical at various
times of year, I've estimated that the soil is about equivalent to
EZNEC's "poor" quality ground in the summer when it's bone dry and "very
good" ground in the winter when soaking wet. It's an approximation at
best, though.

Roy Lewallen, W7EL