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When my Old Top One was at or near your current height, the antenna worked great. If raising works out good...you might even think you have a NV4K up there.

I may have asked this already, but what do you figure is the cause of your match not being lower that 1.50:1?

Again, I've heard reports for the Avanti version as being very low in the US CB band, similar to what I see with my Old Top One. That said, my model using the specs for the Avanti version shows +10.4 ohms if reactance, so the model is inductive. It is not much, but I can't explain that either. Thus the SWR is a little higher and the match is a bit lower in frequency, at resonance, than my OTO. I can fix the model to show better results, but it will require shortening the top hat and a change in the specs.

I think you told us earlier your A/P only showed 1.50:1 SWR pretty much the CB band. Do you see better resonance anywhere?

Sorry Bob, for getting off track in this thread and talking about the AstroPlane, but I did ask you the question.

<blockquote data-quote="Marconi" data-source="post: 615261" data-attributes="member: 903">When my Old Top One was at or near your current height, the antenna worked great. If raising works out good...you might even think you have a NV4K up there.I may have asked this already, but what do you figure is the cause of your match not being lower that 1.50:1?Again, I&#039;ve heard reports for the Avanti version as being very low in the US CB band, similar to what I see with my Old Top One. That said, my model using the specs for the Avanti version shows +10.4 ohms if reactance, so the model is inductive. It is not much, but I can&#039;t explain that either. Thus the SWR is a little higher and the match is a bit lower in frequency, at resonance, than my OTO. I can fix the model to show better results, but it will require shortening the top hat and a change in the specs.I think you told us earlier your A/P only showed 1.50:1 SWR pretty much the CB band. Do you see better resonance anywhere?Sorry Bob, for getting off track in this thread and talking about the AstroPlane, but I did ask you the question.</blockquote>

[QUOTE="Marconi, post: 615261, member: 903"] When my Old Top One was at or near your current height, the antenna worked great. If raising works out good...you might even think you have a NV4K up there. [I][B]I may have asked this already, but what do you figure is the cause of your match not being lower that 1.50:1?[/B][/I] Again, I've heard reports for the Avanti version as being very low in the US CB band, similar to what I see with my Old Top One. That said, my model using the specs for the Avanti version shows +10.4 ohms if reactance, so the model is inductive. It is not much, [I][B]but I can't explain that either.[/B][/I] Thus the SWR is a little higher and the match is a bit lower in frequency, at resonance, than my OTO. I can fix the model to show better results, but it will require shortening the top hat and a change in the specs. I think you told us earlier your A/P only showed 1.50:1 SWR pretty much the CB band. [I][B]Do you see better resonance anywhere? [/B][/I] Sorry Bob, for getting off track in this thread and talking about the AstroPlane, but I did ask you the question.[I][B][/B][/I] [/QUOTE]

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