On 12 Sep 2005 11:59:08 -0700, "Dungeon Master"
wrote:

+The addition of the ground plane kit in theory would lower the angle of
+radiation by a certain percentage. This gives the impression of gain.
+If your in a flat open area in Kanas someplace or are a avid DX'er,
+this may give you a very slight boost. But if you don't fall into those
+2 areas mentioned above, save the cash.
******

More important on a verticle antenna is that the ground plane helps to
isolate the feedline from the antenna. Then the feedline is no longer
part of the antenna system and does not alter antenna tuning.

james