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Jack Twilley wrote:
"This is the kind of experience I had hoped to hear." A look at the vertical radiation patterns of half-wave horizontals broadside to the antenna wire such as that shown on page 3-11 of the 19th edition of the ARRL Antenna Book provides evidence of the best height. A vertical angle of 50-degrees gives a first reflection target distance of 80 to 500 miles, depending on the height of the reflecting layer, from the graph on page 92 of Ed Laport`s "Antenna Engineering". A vertical angle of 5-degrees gives a target distance of 700 to 2500 miles according to the same graph. For angles between 5 and 50-degrees, a dipole height of 1/2-wave maximizes radiation around a vertical angle of about 30-degrees. Best regards, Richard Harrison, KB5WZI |
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