A four square over salt water is very difficult to build. It almost
requires a salt water marsh. If you have salt water available, you may
want to check out the vertical phased dipoles that some of the
DXpeditions have been using lately. It's actually a two element beam
oriented vertically with two elements configured in a diamond shape.
This should beat your XM240 by a significant amount below about 13
degrees elevation. Don't try this over average ground. The ground will
eat your signal.
Jerry, K4SAV
K4SAV wrote:
>..."I didn't tell the whole story about the 1/4 wave vertical:
>it's mounted 30' out in a saltwater river that has a pretty clear
>saltwater path to Europe, Africa, and South America. "....
>
>There is a huge difference between a vertical over salt water and one
>over average ground, maybe as much as 15 dB at very low angles. With a
>decent radial system to get connection to the salt water, the vertical
>should beat the XM240 below about 6 degrees elevation (even if the XM240
>happens to be over salt water too). From about 6 degrees thru 44
>degrees elevation, the XM240 should win.
>
>Or so says EZNEC.
>
>It sounds like the only connection you have to the salt water is the
>feedline (assuming you didn't add a choke).
>
>A four square over salt water is a very good weapon.
>
>Jerry, K4SAV
>
>RLVZ@aol.com wrote:
>
>
>
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