Not fair BM.
My topic is about JJ's A99 idea, and you interjected an idea about a 5/8 wave antenna, and that is what I responded to, nothing more. That idea had nothing to do with the question I originally asked. I never mentioned that any of JJ's models would or would not work, I just asked what folks thought would work best among the options available.
Again, I was referring to your idea, because you were curious, and I told you why I disagreed that there was any radial similarities between a 1/4, 1/2, and 5/8 wave radiator and how they respond. Don't you get it?
Other ideas are fine, but we have to be on guard when mixing results from different ideas. The same applies to free space models and real Earth models, although all we see in JJ's A99 models is a difference in gain only, the trend lines, and the maximum current angles are pretty much the same.
Nav, I've also wondered why the Imax GPK is at the bottom, and the A99 at the top of the mounts.
I don't know if this makes any difference in modeling the Imax, but IMO the radials just don't make much if any difference on the A99, modeling or real world testing. Reason being for me is: there is not much current flowing in that area of the antenna for an A99, and since there is more current flowing at the bottom of the Imax, maybe that is a good reason to put the radials at the bottom where there is some current. I've never tested a GPK on my Imax, but I find little to no affects...when installing a GPK on my A99.
The short piece of coax inside of the antenna should be almost totally transparent to the coaxial system, excepting for any affects from the connector, so making the coax to run all the way to the tuning coil would seem to me to be meaningless. It is similar to adding a short jumper.
