Thanks Charlie and Don, that helps. This is the first time I have gone with an antenna that needs radials/ground poise.
Dick, n0ce On 12/29/2016 11:05 AM, Don Wilhelm wrote: > Dick, > > With buried radials, they do not have to be 1/4 wave long, and a > single one will probably not make much difference over your ground rod. > What you want to accomplish is a "ground screen", which means many > short (about 1/8 wavelength) close to the base of the radiator and a > few extending out further (to 1/4 or 1/2 wavelength). > > Ground conductivity plays a great part in buried radials, and what you > are trying to accomplish is to increase the ground conductivity in the > area at the base of the antenna. > > If you were instead using elevated radials, they would have to be > resonant - think of the various "ground plane" antennas that have been > published - 1/4 wave radiator plus 2 or 4 1/4 wave radials. > Buried radials do not have to be resonant, elevated radials must be > resonant. The ground effects will alter the resonance of buried > radials while radials in the air are a part of the total antenna > resonance. > > 73, > Don W3FPR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
