The measured data linked below shows how the number of buried radials affects the performance of monopoles of various height to 90 degrees, for an applied power of 1 kW. Earth conductivity at the test site was about 4 mS/m.

http://i62.photobucket.com/albums/h85/rfry-100/BLandERadials.gif
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UR RST IS ... ... ..9 QSB QSB - hw? BK

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