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HELP WITH EZNEC+?

The more I work with this EZNEC+ program the more I agree with MrSuburban. I have a lot to learn about how to use this program on my own. I see that you can enter any reasonable alternate impedance you want to correct the match and it does not effect gain in the program. One thing I have noticed is missing in the Sigma model I was given to work with is the correct location of the source as it would be applied by the gamma.

The source on this antenna should be applied where the "dog bone" makes it's connection between the gamma and main radiator. Moving the source from the bottom, towards this higher location increased the free space gain to 6.21dbi. I'm bright enough to know I'm lost with this program because that's some place between 50% and 100% more gain then the design produces under real conditions.

I know there are several forum members familiar with EZNEC+ that have an interest in the Sigma design. Is anyone willing to help me understand if this program is able to accurately model this design or exchange any existing models for comparison? It would be great if someone could look at my 6.21dbi free space model and be like "there is your problem"! If you're interested, please message me.

<blockquote data-quote="Shockwave" data-source="post: 258947" data-attributes="member: 10882">HELP WITH EZNEC+?The more I work with this EZNEC+ program the more I agree with MrSuburban. I have a lot to learn about how to use this program on my own. I see that you can enter any reasonable alternate impedance you want to correct the match and it does not effect gain in the program. One thing I have noticed is missing in the Sigma model I was given to work with is the correct location of the source as it would be applied by the gamma.The source on this antenna should be applied where the &quot;dog bone&quot; makes it&#039;s connection between the gamma and main radiator. Moving the source from the bottom, towards this higher location increased the free space gain to 6.21dbi. I&#039;m bright enough to know I&#039;m lost with this program because that&#039;s some place between 50% and 100% more gain then the design produces under real conditions.I know there are several forum members familiar with EZNEC+ that have an interest in the Sigma design. Is anyone willing to help me understand if this program is able to accurately model this design or exchange any existing models for comparison? It would be great if someone could look at my 6.21dbi free space model and be like &quot;there is your problem&quot;! If you&#039;re interested, please message me.</blockquote>

[QUOTE="Shockwave, post: 258947, member: 10882"] [b]HELP WITH EZNEC+?[/b] The more I work with this EZNEC+ program the more I agree with MrSuburban. I have a lot to learn about how to use this program on my own. I see that you can enter any reasonable alternate impedance you want to correct the match and it does not effect gain in the program. One thing I have noticed is missing in the Sigma model I was given to work with is the correct location of the source as it would be applied by the gamma. The source on this antenna should be applied where the "dog bone" makes it's connection between the gamma and main radiator. Moving the source from the bottom, towards this higher location increased the free space gain to 6.21dbi. I'm bright enough to know I'm lost with this program because that's some place between 50% and 100% more gain then the design produces under real conditions. I know there are several forum members familiar with EZNEC+ that have an interest in the Sigma design. Is anyone willing to help me understand if this program is able to accurately model this design or exchange any existing models for comparison? It would be great if someone could look at my 6.21dbi free space model and be like "there is your problem"! If you're interested, please message me. [/QUOTE]

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