There is some erroneous information here, as well as in Don W3FPR's post.
Radials, whether buried or raised, only affect near field ground return
currents. You cannot improve ground conductivity beyond the radials,
and the strength of the low angle lobe is directly affected by the
ground conductivity several wavelengths distant from the vertical. This
is well established science and you can clearly see the effect in simple
models.
Dave AB7E
On 3/13/2020 11:14 PM, Edward R Cole wrote:
As far as a vertical mounted on solid rock, ever heard of radials?
Almost all analysis shows angle lowering by copious addition of
radials to a vertical. I suggest You find the QEX articles written
By Rudy-N6LF which studied radials thoroughly. Even with very short
radials my 630m inverted-L gets out over 2500-miles (at times0.
Another antenna I discovered that I really liked is the Moxon. I has
the gain of a two-element yagi but works well in almost all directions
(point it toward your favorite direction). I ran a 6m moxon at 0.7
wavelength height in CO during a contest and worked all four borders
of the lower 48 states using 150w. Worked quite well without turning
it (pointed east).
At home I use an inverted-V with center at 40-foot and tails at
20-foot. Works out to 800 miles very well; works West Coast
(3000-miles) from AK in BP40 with 100w.
73, Ed - KL7UW
http://www.kl7uw.com
Dubus-NA Business mail:
[email protected]
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