At some point I posted all of my antenna models at 32' feet over average Earth in a PDF file. I first put them in descending order of rank as to best gain and angle. This will confirm what my Eznec models, right or wrong, have generally shown for some time.
I probably have worked on many of these models and made changes that improved the model, and could have either resulted in more or a bit less gain. The only one I know for sure is the Vector 4000, which ended up with less gain, and I moved it in the file as a result.
See the PDF here in my post #1 noted as "View Attachment":
http://www.worldwidedx.com/threads/take-off-patterns-for-cb-antennas-we-use.158801/
IMO, there is not enough difference here to really matter just using our radio to tell.
I'm not sure what your point is here, but I guess you'll explain in due course.
Bob, I think I studied this idea with my models sometime back, but I don't remember exactly what I saw in the process, and I'm also not sure how Sirio's increasing the radial length played into all the considerations for a longer Vector either. I think their issue in changing to the New Vector 4000 design was to make the antenna a bit shorter without sacrificing any gain...in order to help improve the durability of the product. So, maybe they did give up a little gain. But I wonder how much gain could it be? All I know is I cannot make my model show the gain that Sirio reports for their New Vector 4000, in free space or over real Earth.
I can make my Sigma 4 show a lot better gain and angle if I cheat however...and maybe one day I will show how that is possible.
Fair enough Bob.
BTW Bob, with some of my contacts this past weekend...I would turn my power down to less than 5 watts and nobody was ever the wiser. I do not recall loosing a single contact as a result, but I do remember one guy that had no signal and I could only read him on my NTO...which at times was noticeable quieter.
Yes Bob, the cursor always pops up at the maximum angle given! I attached the pattern with the cursor moved to the maximum low angle which shows a fraction less gain.
