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Their performance differences may be less than sometimes expected.

Richard Fry
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Below is a graphic comparing some of the operational parameters of ground-mounted and elevated vertical radiators for the 40-meter band.

Their performance when installed at sites with relatively poor Earth conductivity is fairly similar.

enter image description here

Richard Fry
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    Interesting! I had always thought that the performance of a vertical with elevated radials was better than that of a vertical with radials buried in earth of poor conductivity. – rclocher3 Mar 03 '20 at 14:39
  • @rclocher3 Not better, but from the publications of N6LF (Dr. Rudy Severns) and others, I thought they could be the same. Please scroll past the table and graphs down to the "Relevant links" section [**here**](https://web.archive.org/web/20180815154501/http://w0btu.com/Optimum_number_of_ground_radials_vs_radial_length.html) and you can read them. Rich, this is new to me, and if this wasn't your answer I may have downvoted it instead of upvoting it. :-) – Mike Waters Mar 03 '20 at 16:35
  • rclocher3 commented: _I had always thought that the performance of a vertical with elevated radials was better than that of a vertical with radials buried in earth of poor conductivity._ –- Even for the 1 mS/m conductivity curves in my graphic, the red trace would be nearly identical to the green trace IF the vertical with buried radials was using 120 of them instead of 32. – Richard Fry Mar 05 '20 at 08:38