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Roy and Tom,
Thank you. I actually tried that as one experiment. The loads window showed the connection as you described. When the antenna is configured close to what I expect there is a resonance near the intended frequency. So that is progress. Now I am just trying to tweak the parameters. On the SWR scan is there a way to print or plot the step outputs? I am trying to determine the resonance point. Thanks, Dan Roy Lewallen wrote: To add to Tom's excellent explanation, let me add that you only need one wire to model the vertical. I suggest beginning with the Vert1.ez example antenna to get an idea of how it works. Look at the model with the View Antenna display. Then specify a load in wire 1, 50% of the way from end 1. The load will appear in the View Antenna display as a little square. The Loads Window (where you specified the load) will show that the actual position is 55% of the way from end 1, which is the closest EZNEC could place it with the specified number of wire segments. If you change the number of segments to an odd number, EZNEC will be able to place the load exactly at the middle. You can specify other positions in the same fashion, but it might require more segments to get it really close to where you want. Source and load positions are specified in exactly the same way. Roy Lewallen, W7EL dansawyeror wrote: All, I am trying to model a loaded vertical using EZNEC. It is fairly easy to start with the vertical model and extend or shorten it. I also think I created a load correctly. However I seem unable to connect the load to the vertical segment. How can that connection be verified? Also, what type of also load supports a second connection to a second wire to simulate a mid load? Thanks, Dan |
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