[TowerTalk] Ground Plane Model Problem

[jimlux]

K0SN wrote:
> Gentlemen:
> I have been modeling a ground plane vertical antenna with elevated radials.
> It's made of 3" aluminum tubing at a base height of about 15 feet.
> My problem is EZNEC is reporting the feedpoint impedance to be
> around 10 ohms, which disagrees with the conventional wisdom that
> says it should be in the vicinity of 50-75 ohms. Any suggestions? Has
> anyone encountered a similar problem while running EZNEC or another
> modeling program? Any input would be appreciated.
> Tom K0SN
> Porterfield, WI
> 

What does it give if you run the model in free space?

Are the radials drooped, or at right angles?

I think that the GP vertical is one of the examples that comes with NEC.