Well Bob, the model did not work as you suggested. I think I found this before. My S4 model is set at 28.7' feet and that was where I stopped, but I don't remember why I stopped there. I do remember you suggesting I go longer before, and again I noticed the same thing then as now...the gain went down a bit when I went longer than 28.7' feet, so maybe that is why I stopped there.
I went the other way, down to 26.4' feet for radiator length and the gain improved. I did not change the segment counts for the wires involved as I made them longer and shorter, so I saw the current in the radiator increases, which might be expected. However the currents in the radials, and mast decreased without changes to their lengths and I would consider that good. BTW, the pattern started getting a high angle lobe as I went shorter. So, even while the gain shows some improvement the pattern is not. If I tweaked the segment count as I made such changes, the model may not show the same however. That is just too much to try and keep up with. Boy, I don't know how in the world you could have determined this without testing using very fine detail. I could never see such changes using real world adjustments and using my radio. EzBob is a real optimizing wizard worker to detect such small changes. I changed the antenna length 1" at a time, up to a point, then I started moving the radiator shorter 5" at a time near the end.
If an inch makes this much difference while adjusting the radiator length, then imagine how small adjustment might have to be adjusting a gamma match. But I've said this before.
Here are my notes if you can read them on these post-its.
The three columns to the right are for:
Radiator tip height in inches
Gain
Angle
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