Booty I have not even attempted to try to learn how to use a modeling program.
That is not to say I do not research the www and read about the graphs and how they relate to the different type of antenna's.
I will study the graphs then go build an antenna and see how it does.
As DOC said, the modeling is sort of like an "It may work like this" type of thing IMO. Have to take into consideration all the surroundings and the type of ground under the antenna. I think DOC said all this already.
I firmly believe, and have tested the theory of Height and TOA.
Three element at 75' I could work into Japan from Florida with no problem on 15 meters. The yagi is a Mosley TA-33.
The Mosley PRO67B has three active elements on 15 meters. It was at 45' in height and I could not even hear the JA station good enough to make a contact.
That 30' made all the difference.
I study Eddie's graphs and read Bob's comments, build the vertical and try it on 11 meters. If it works out on 11 meters then I build some for the other Pork Butt bands, and they usually work good there also.
Guess what I am trying to say is modeling has it's use and does serve a purpose, but it is not at all conclusive as to how that antenna will perform "on the air". That is why I like it that Eddie takes the time and effort to model his antenna's, then install them and compare them.
None of it is Scientific approved method, but then again I do not think any of us are scientists.
Just real world results with a real world effort put into the testing and evaluation. Thanks Eddie for all the time and effort you have put into this modeling and testing. I am learning from these threads, as are many others.
