Don is of course correct in his reference to the antenna actually being an "extended double zepp" using the dimensions in my example.
73 ! K0PP On Sat, Dec 8, 2018, 15:15 Don Wilhelm <donw...@embarqmail.com wrote: > Ken and all, > > More correctly if the terminology of hams is to be deemed correct, it is > a "Double Extended Zepp". The radiator each side of center is 5/8 > wavelength long (at 20 meters). The 32' 300 ohm ladder line is for > impedance transformation. It does provide some broadside gain on 20 > meters. > > I hesitate to call anything other than the original Zepp antenna (so > named because it was towed behind Zeppelin airships) a "Zepp", but hams > have known to construe antenna names before. > > The original Zepp antenna is a half wave antenna fed with a 1/4 wave > parallel feedline. Turn it vertically and what do you have but what is > commonly called the J-pole in VHF circles. > > Who said there is new antenna technology? Much is just renamed antennas > that have been around for 50 to 80 years in one form or another. > Various methods of radiator to feedline matching may be newer stuff, but > the behavior of radiators has been relatively unchanged over a long > period of time. > > 73, > Don W3FPR > > On 12/8/2018 11:32 AM, Ken G Kopp wrote: > > As I've already stated … I have a copy of the original Varney > > RSGB article that describes the G5RV and plainly states that > > it's a 20M only antenna. > > > > Remember, it requires an antenna tuner … > > > > Start with a dipole … > > > > Keep the "magic" 32' length of 300 ohm feedline. > > > > Delete the 68' of coax. > > > > What's left? A "normal" open wire fed dipole, better > > known as a Zepp. > ______________________________________________________________ > 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 elecraftcov...@gmail.com ______________________________________________________________ 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
