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Homer, you'll be surprised at these Exnec model results. You already know my opinion regarding shortened 1/4 wave radiators with a noticeable top hat attached, and how they can compare favorably with a full 1/4 wave radiator. For me, this idea also applies to radial elements too.

IMO, this idea that Nav2010's is describing is sort of like the model I posted for Bob85 up above, as a result of his post sometime back concerning what he and Multimode200 found out with MM200's end fed 1/2 wave. I think his antenna might have been a Silver Rod or Thunder Pole antenna rather than an A99 however. http://www.thunderpole.co.uk/1-2_wave.htm

BM, in my opinion there is a big difference in how a 5/8 wave radiator is affected by radials and a 1/2 wave. The same applies to a 1/4 wave, but it needs radials even more so. Since Imax is a 5/8 wave, one might ask how it performs without radials? If you doubt this then you are Homer try your 5/8 wave ground planes without radials...and you'll see they don't work so good. The answer is in the matching device, just like Shockwave told us some time back.

<blockquote data-quote="Marconi" data-source="post: 346923" data-attributes="member: 903">Homer, you&#039;ll be surprised at these Exnec model results. You already know my opinion regarding shortened 1/4 wave radiators with a noticeable top hat attached, and how they can compare favorably with a full 1/4 wave radiator. For me, this idea also applies to radial elements too. &nbsp;IMO, this idea that Nav2010&#039;s is describing is sort of like the model I posted for Bob85 up above, as a result of his post sometime back concerning what he and Multimode200 found out with MM200&#039;s end fed 1/2 wave. I think his antenna might have been a Silver Rod or Thunder Pole antenna rather than an A99 however. <a href="http://www.thunderpole.co.uk/1-2_wave.htm" target="_blank">http://www.thunderpole.co.uk/1-2_wave.htm</a>&nbsp;&nbsp;BM, in my opinion there is a big difference in how a 5/8 wave radiator is affected by radials and a 1/2 wave. The same applies to a 1/4 wave, but it needs radials even more so. Since Imax is a 5/8 wave, one might ask how it performs without radials? If you doubt this then you are Homer try your 5/8 wave ground planes without radials...and you&#039;ll see they don&#039;t work so good. The answer is in the matching device, just like Shockwave told us some time back.</blockquote>

[QUOTE="Marconi, post: 346923, member: 903"] Homer, you'll be surprised at these Exnec model results. You already know my opinion regarding shortened 1/4 wave radiators with a noticeable top hat attached, and how they can compare favorably with a full 1/4 wave radiator. For me, this idea also applies to radial elements too. IMO, this idea that Nav2010's is describing is sort of like the model I posted for Bob85 up above, as a result of his post sometime back concerning what he and Multimode200 found out with MM200's end fed 1/2 wave. I think his antenna might have been a Silver Rod or Thunder Pole antenna rather than an A99 however. [URL]http://www.thunderpole.co.uk/1-2_wave.htm[/URL] BM, in my opinion there is a big difference in how a 5/8 wave radiator is affected by radials and a 1/2 wave. The same applies to a 1/4 wave, but it needs radials even more so. Since Imax is a 5/8 wave, one might ask how it performs without radials? If you doubt this then you are Homer try your 5/8 wave ground planes without radials...and you'll see they don't work so good. The answer is in the matching device, just like Shockwave told us some time back. [/QUOTE]

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