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Well Marconi, I had a 5' pole I hammered into the ground about a foot to hold the Penetrator while I built it. Once on the roof it was about 40' to the radials.
Maybe being 4' off the ground and one wave length plus 4' in the air saw similar ground influence but all I know is I tuned it with the MFJ259 at 4' and simply straightened out the match wire once in the air to regain my almost zero reactance and 1:1 swr.
I would be surprised if the elevation above ground didn't have a much more significant effect on horizontal antennas, but the radials are there for a reason, to elevate ground and decouple the coax, and perhaps the specific match and radial placement design may be even more oblivious to earth ground, or perhaps my ground isn't nearly as conductive, or all of the above.
Remember that post on copper forum where tech833 tested it and saw a pattern that sharply cut off all downward radiation below the radials?
Maybe it works both ways.

<blockquote data-quote="Needle Bender" data-source="post: 344528" data-attributes="member: 13339">Well Marconi, I had a 5&#039; pole I hammered into the ground about a foot to hold the Penetrator while I built it. Once on the roof it was about 40&#039; to the radials.Maybe being 4&#039; off the ground and one wave length plus 4&#039; in the air saw similar ground influence but all I know is I tuned it with the MFJ259 at 4&#039; and simply straightened out the match wire once in the air to regain my almost zero reactance and 1:1 swr.I would be surprised if the elevation above ground didn&#039;t have a much more significant effect on horizontal antennas, but the radials are there for a reason, to elevate ground and decouple the coax, and perhaps the specific match and radial placement design may be even more oblivious to earth ground, or perhaps my ground isn&#039;t nearly as conductive, or all of the above.Remember that post on copper forum where <a href="http://www.copper.com/discus4/messages/7750/111489.html?1316149099" target="_blank">tech833 tested it</a> and saw a pattern that sharply cut off all downward radiation below the radials?&nbsp;Maybe it works both ways.</blockquote>

[QUOTE="Needle Bender, post: 344528, member: 13339"] Well Marconi, I had a 5' pole I hammered into the ground about a foot to hold the Penetrator while I built it. Once on the roof it was about 40' to the radials. Maybe being 4' off the ground and one wave length plus 4' in the air saw similar ground influence but all I know is I tuned it with the MFJ259 at 4' and simply straightened out the match wire once in the air to regain my almost zero reactance and 1:1 swr. I would be surprised if the elevation above ground didn't have a much more significant effect on horizontal antennas, but the radials are there for a reason, to elevate ground and decouple the coax, and perhaps the specific match and radial placement design may be even more oblivious to earth ground, or perhaps my ground isn't nearly as conductive, or all of the above. Remember that post on copper forum where [URL="http://www.copper.com/discus4/messages/7750/111489.html?1316149099"]tech833 tested it[/URL] and saw a pattern that sharply cut off all downward radiation below the radials? Maybe it works both ways. [/QUOTE]

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