Yes Don, I knew when I used the term "classic Zepp" that I was taking a bit of liberty with the term. The original Zepp was indeed end-fed from the cabin of a Zepplin. I've often wondered how long the feeder actually was. They may have been closer to a simple end-fed wire.
I'd also noted the concept repeated in the J-pole. We "old ops" have certain advantages ... 73! Ken On Sat, Mar 10, 2012 at 3:23 AM, Don Wilhelm <w3...@embarqmail.com> wrote: > Ken, > > I will agree with all until I got to the end of your post - "classic zepp" > The original (and classic) Zepp antenna was a 1/2 wave wire fed through > a 1/4 wave transmission line connected to the end that was trailed > behind lighter-than-air aircraft (Zepplin). If you look at the J-pole, > and turn it horizontally, you will see exactly the same thing - a 1/4 > wave transmission line with one side connected to a 1/2 wavelength radiator. > > I am not sure how the "Zepp" term became associated with any kind of > center fed dipoles, but it has in ham circles, and I find it confusing - > there is the Center Fed Zepp (2 halfwaves in phase) antenna, and then > there is the Extended Center Fed Zepp (5/8 wavelength each side of > center), and then there is the "classic Zepp" that is the antenna > designed for trailing the aircraft. So we must be careful to explain > which kind of Zepp antenna we are referring to when we write "Zepp" > There is a lot of difference. > > 73, > Don W3FPR > > On 3/9/2012 9:53 PM, Ken G Kopp wrote: >> I have Varney's (G5RV) original article. The antenna was designed >> for -only- 20M . Since then it's taken on the proverbial "life of it's >> own" and become somewhat of a "cult" antenna, as is the case with >> the "Carolina Windom". >> >> Why would one start with a perfectly good balanced-line fed Zepp, >> cobble a piece of "special-length" coax onto the end of that balanced >> line so that the antenna becomes something else, and then have to >> use an antenna tuner to make the thing work? >> >> Since the antenna requires a tuner, why not connect the balanced line >> to a balanced tuner ... or one with a balun ... and enjoy all the virtues >> of a classic Zepp? >> >> 73! >> >> Ken Kopp - K0PP >> 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 >> > ______________________________________________________________ > 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 ______________________________________________________________ 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
