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Bob, I don't want to get off track with my comment "...you would be disappointed in the results..." in my posted overlays in #452. But, I remember you commenting a while back that my AstroPlane models were showing 60+ ohms of impedance and the match was not 1.20:1 SWR like you were getting with your original A/P. It was a new model and I have not worked with it.

Along with the overlays I also produced the currents and I figure if you were disappointed in the SWR...whatever the currents showed us...you could correctly question such results. That is why I only posted the overlays which showed there was little to no difference in the patterns when I made the antenna part of the mast longer by 12" inches in 3 iterations for the idea. This is a short range compared to DB report of similar effects...but this is what I thought you were looking for.

So, I dug out the model of my Old Top One and posted the Free Space model to show the Average Gain and a near perfect match to boot.

I was thinking, if I then changed the mast length like I did above with my AstroPlane model in post #452, you might feel better taking a look at the currents report...which is 6 pages long and showing the currents and phase for every segment in the model. Then you could check out if there was a difference in the currents that really made a difference. I mentioned the difference I saw were fractional at best and I don't expect that to change if I do the same with this model of the Old Top One.

Then all I have to consider is if you have any confidence in the Old Top One being a fair equal of the original AstroPlane which has modestly different dimensions.

I hope this is clear.

<blockquote data-quote="Marconi" data-source="post: 594197" data-attributes="member: 903">Bob, I don&#039;t want to get off track with my comment &quot;...you would be disappointed in the results...&quot; in my posted overlays in #452. But, I remember you commenting a while back that my AstroPlane models were showing 60+ ohms of impedance and the match was not 1.20:1 SWR like you were getting with your original A/P. It was a new model and I have not worked with it.Along with the overlays I also produced the currents and I figure if you were disappointed in the SWR...whatever the currents showed us...you could correctly question such results. That is why I only posted the overlays which showed there was little to no difference in the patterns when I made the antenna part of the mast longer by 12&quot; inches in 3 iterations for the idea. This is a short range compared to DB report of similar effects...but this is what I thought you were looking for.So, I dug out the model of my Old Top One and posted the Free Space model to show the Average Gain and a near perfect match to boot. I was thinking, if I then changed the mast length like I did above with my AstroPlane model in post #452, you might feel better taking a look at the currents report...which is 6 pages long and showing the currents and phase for every segment in the model. Then you could check out if there was a difference in the currents that really made a difference. I mentioned the difference I saw were fractional at best and I don&#039;t expect that to change if I do the same with this model of the Old Top One.Then all I have to consider is if you have any confidence in the Old Top One being a fair equal of the original AstroPlane which has modestly different dimensions.I hope this is clear.</blockquote>

[QUOTE="Marconi, post: 594197, member: 903"] Bob, I don't want to get off track with my comment "...you would be disappointed in the results..." in my posted overlays in #452. But, I remember you commenting a while back that my AstroPlane models were showing 60+ ohms of impedance and the match was not 1.20:1 SWR like you were getting with your original A/P. It was a new model and I have not worked with it. Along with the overlays I also produced the currents and I figure if you were disappointed in the SWR...whatever the currents showed us...you could correctly question such results. That is why I only posted the overlays which showed there was little to no difference in the patterns when I made the antenna part of the mast longer by 12" inches in 3 iterations for the idea. This is a short range compared to DB report of similar effects...but this is what I thought you were looking for. So, I dug out the model of my Old Top One and posted the Free Space model to show the Average Gain and a near perfect match to boot. I was thinking, if I then changed the mast length like I did above with my AstroPlane model in post #452, you might feel better taking a look at the currents report...which is 6 pages long and showing the currents and phase for every segment in the model. Then you could check out if there was a difference in the currents that really made a difference. I mentioned the difference I saw were fractional at best and I don't expect that to change if I do the same with this model of the Old Top One. Then all I have to consider is if you have any confidence in the Old Top One being a fair equal of the original AstroPlane which has modestly different dimensions. I hope this is clear. [/QUOTE]

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