[Lowfer] modeling

[Eric Smith]

Help!

I'm having trouble figuring out how much of a loading coil I need using 
NF.  Could one of you run these numbers for me?

My antenna is 30' from the ground to the top -- 22 gauge.
My tophat has 4 x 4' radials (5/16" dia) with a 4 x 22 gauge skirts at 1', 
2', 3', and 4' radius.
Target frequency is 185 kHz.

I was successful modeling this thing before I built it -- now I don't know 
what I'm doing wrong.  I want to build the loading coil, but I can't 
figure out how much inductance I need.

Thanks in advance for your help,
Eric