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Homer, look at the overlay again, there are three models to compare and they all show the same pattern, same gain, and same angle.

 

The model that shows to be the best model was done by lowering the angle of the radials to about 20* degrees from 40* degrees. I just threw the "Merlin Low Angle TH no coil" model in to show you how you might modify your antenna to show slightly more gain.

 

There are four models noted, and I added notes hoping to avoid any confusion. The other three models are the ones I compared using the original Merlin model and that was my primary focus. 

 

I'll be posting the models soon, but I hope this explanation clears up what you are seeing in error. For now, just forget about the "Merlin Low Angle TH no coil" model. It is not a part of the 3 antennas in comparison.

 

I posted more about this on the other forum, if that helps. I should have just done a ditto of the post on Charlie Tango. Sorry for the confusion.