On Jun 14, 2006, at 9:46 AM, Dave Tipton wrote:
> Where it gets wierd, is that when you bury the radials, you can get
> away with much shorter runs, primarily because 4 or 5 radials 20
> feet long, will actually couple to ground nicely if buried. No
> need for full 1/4 wavelength radials if they're under ground.. It
> all gets muddled pretty quickly once their an inch under the surface.
I don't think that 4 or 5 20 foot radials are going to be a terribly
effective groundplane for a 160m vertical.... Even if you bury them.
True, the far ends of the wire do less and less "work" of a ground-
mounted radial system. If you had 60 1/4 wave radials and 60 1/2 wave
radials, the 1/2 wavers would be slightly more effective -- but only
slightly - perhaps a fraction of a dB. So, was it worth using twice
the wire?
With ground-mounted radials, .22 or .20 wavelength radials will be
nearly as effective as .25 wavelength, especially if you use 20-30 or
more.
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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