Wes, thanks for posting this great reference. Certainly turns a bunch of stuff I have read on its ear and will help with my antenna building underway.
73, Bill K9YEQ -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Wes Stewart Sent: Wednesday, March 1, 2017 10:18 AM To: [email protected] Subject: Re: [Elecraft] 80 Meter Verticals Now that I provided the succinct answer, allow me to provide an in-depth answer. But rather than me doing it, I will take the easy way out and simply provide a link to the fine explanation done by Tom, W8JI: https://www.w8ji.com/radiation_resistance.htm Wes N7WS On 3/1/2017 7:27 AM, Wes Stewart wrote: > No truth at all. > > On 3/1/2017 6:25 AM, Charlie T, K3ICH wrote: >> Is there any truth in the theory of making the vertical radiator out >> of multiple wires such as ladder line and even adding a third wire >> woven through the ladder sections and fed on one wire? The physical >> result is three parallel wires but electrically connected so as to form and >> "up, down and up >> again" element. This supposedly raises the radiating element impedance >> relative to the fixed ground loss resistance. The idea I'm told, is >> that since the ground resistance (loss) is fixed at whatever it is >> but as the actual radiating element impedance is raised, the antenna >> becomes more efficient since the ground loss percentage of the >> overall feed point impedance is lowered. This impedance change >> happens in much the same way as a folded dipole feed is a higher >> impedance than a conventional dipole using a single wires. >> I saw this written up a few years ago as a means of increasing the >> overall efficiency of an inverted L for either 160 of 80 M. >> >> I had an "L" made of the smaller ladder line on 160 with only four ¼λ >> radials on the ground that seemed to work fairly well. My plan was to >> install elevated radials, but that would have been a LOT of wire around the >> yard. >> Something broke on it after a year or so, and I never re-installed it. >> >> 73, Charlie k3ICH __________ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
