Most studies concur that "buried radials" should not be deep but preferably
at the surface. Also most instillations incorporate a conductive mat at and
around the base of a vertical radiator where the ground current is highest.
This supports the discussions of using more and shorter radials will be
better than fewer but longer radials. i.e. - 20 radials of 20 ft each will
be better than 4 radials of 100 ft each. In both cases, 400 ft of wire
required.
73
Bob, K4TAX
----- Original Message -----
From: "Stuart Rohre" <rohre@arlut.utexas.edu>
To: <tentec@contesting.com>
Sent: Friday, May 18, 2012 6:19 PM
Subject: Re: [TenTec] Radial Research
Oh Yes, Rudy is quite specific about elevated radials also.
They are the most efficient.
Just consider that dirt is not a very good conductor of RF, why would
you shield your radials by burying them in or near a non conductor?
Atop the ground would be the least of the lossy methods, while elevated
radials would have the best performance as his data shows. Rudy shows
they don't have to be elevated high to get the performance up.
Radials do tune your antenna depending on their type and length, also
covered in his experiments.
Stuart Rohre
K5KVH
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