I believe you NB. You said the same thing earlier and that is why I posted a suggestion.
I don't think I have posted any models in this thread recently, at least not since Bob anounced his new old A/P install at his location. You must be talking to The DB in your added comments.
Right after Bob made his post I used a A/P model I had saved and I did some work on various mast lengths below the hoop. However I got to feeling bad and stopped. So, I'm far behind in this thread.
The other day DB posted some pattern results and I was very surprised at the antenna gain he reported. So, I got back at it for a couple of days trying to figure out what he was doing to get such high gains.
When he posted his updated model, "adjusted to be the same dimensions of the actual antenna," I could see one noticable difference. He is placing his feed point on the bracket wire, my wire #2 below. I place my FP on the radial that goes down to the hoop, top of wire #3.
I tested his idea but I got a very bad Average Gain result. I suspect this is likely the big reason for his high gain.
NB'r I post this model below. I used my dimensions so that could account for some differences in results, but like DB said of Ghz24's model...maybe it is close enough.
My point here is to help support my idea for Bob's claim that this antenna does not do so well without a mast in the radial area.
Below are three PDF files for my model (Astro P DB's FP 32'), over real Earth. Also note I have added my antenna notes for each model showing my wire length dimensions, and some comments for what I was considering.
1. has the feed point located on the bracket wire at 32' feet. In my model this is wire #2 in the close up view.
2. is the same model as #1 but it is in Free Space and has no supporting mast, only the mast inside the radials and just for consideration for various lengths modeled...it extends below the hoop approx 108" inches.
I also added an image of the bad Average Gain Result I get when I set the feed point on wire #2 as apposed to the top of wire #3...where I think is approximately where the A/P feed point should be located.
3. is the same as above but without any mast at all for the model like I think NB's might be suggesting is possible.
