That's alright Bob, I used the dimensions in the Schematic diagram I posted above. I didn't really intend for you to go to the trouble of actually measuring the GM.
Here is the model...it is still a work in progress. I have not tried to add the stub yet.
It is in Free Space. The AG reports 1.082 = 0.34 db, which is not too good. Eznec also shows the model contain Loss. This loss is due to my adding the loss for the coax in the radiator and the coil at the 10 meters level. You will see this in the Transmission Line tool details report.
The AG error value of 0.34 db is the overstated error for the maximum gain and angle. In this case, we subtracted the error correction value from the reported gain since the correction value is a (+). If the value was (-) the value would be added to the reported maximum gain and angle value.
2.76 dbi - 0.34 = 2.42 dbi, for the real maximum gain and angle.
Bob, this model is to specs as best I can tell.
The PDF file below also includes the wires description report that shows all the wires, the Transmission Line tool details, and the capacitor details I added at the feed point.
The main thing I see is what happened with the coil when I made it coaxial instead of just a wire helix as I posted earlier. Then the coil started acting like a choke. The inductance, which was over >600 ohms, in the model to start with, dropped the inductancee down to +27.14 ohms at the feed point as soon as I setup the details using the Transmission Line tool on the coil and the bottom radiating element.
