We are developing a new class of non-radial 160m counterpoise solutions. We had a few installed, and in use in the Stew Perry Topband Distance Challenge last weekend. (We're actually TESTING them before we go into blather mode, fancy that.) Look up W0UCE in the 3830 TBDC score listing and compare his score to others in his area (NC, VA, DC, PA). Nothing like contests to point out weaknesses, or none. As of last count, he was in the top quarter of single op high power scores, worldwide.
W0UCE's transmit antenna had NO radials of any kind. He has a very minimal up 47 feet out 85 foot end-fed wire for 160 (limits dictated by available trees -- sound familiar?), working against a single wire elevated folded counterpoise, no radials. He has no space on his subdivision lot for beverages and used a pennant and K9AY loop for RX antennas. The counterpoise, while giving up on field cancellation loss below (the gift of DENSE radial fields) is designed to minimize ground induction losses underneath while being an effective counterpoise -- return energy for use in the RADIATING element. His words were "I felt loud." There ARE significant differences between actual measurements and model predictions (the expensive NEC4 pro EZNEC stuff) which we have not explained (not for lack of trying), but if you really want to test something, put it on line in a contest and go head to head with everyone else. There's no BS in contest results, just stark reality. You either beat or get beat (think NASCAR and tire and engine testing). W0UCE's signal over the period of the contest is documented in the Reverse Beacon Network, and we can compare it to anyone else's in the USA over the contest period. Jack's category of station is "small lot little guy, running an amp." Don, if you're interested, you're local, and we could put up one at your place, including the cook's tour about how we think it works. The 160m version of the counterpoise fits inside a a 45 degree right triangle that has short sides of 60 feet and a hypotenuse of 86 feet, to get the max out of small lots. It's specifically being designed for the little guy. UCE lives in Youngsville and a tour is easily arranged if you're interested. We won't be asking anyone to put up something we haven't already tried and tested. 73, Guy. On Tue, Dec 21, 2010 at 10:32 AM, Steve Ellington <n...@carolina.rr.com> wrote: > Logically ..... > > You may as well have a big loss in the near-field and get it over with. > > That way you'll have less to loose in the far field! > > > Steve > N4LQ > ----- Original Message ----- > From: "Guy Olinger K2AV" <olin...@bellsouth.net> > To: "Tony Estep" <estept...@gmail.com> > Cc: <elecraft@mailman.qth.net> > Sent: Tuesday, December 21, 2010 10:28 AM > Subject: Re: [Elecraft] Inverted-L (was OT: Vertical antenna) > > >> The only thing I would point out about the article is that it >> basically is a tabulation of model results, an extension of the model >> presentation, what do you get if you run the model over and over kind >> of thing. The modeling of dirt is in itself an attempt to extend a >> limited paradigm of MF measurements (aka commercial broadcast band), >> focused on measurements at the ground for very practical reasons >> (Norton-Sommerfield) and has its own set of well-known issues. It is >> quite common to model radial kinds of issues and then install a design >> and find quite different results. Dirt, and all its variability, >> remains notoriously resistant to being modeled. Modeling can, I say >> "can", get one in the neighborhood and it's back to cut and measure, >> and a degree of common sense. >> >> 73, Guy. >> >> On Mon, Dec 20, 2010 at 10:14 PM, Tony Estep <estept...@gmail.com> wrote: >>> For those who wish to pursue the radials question further, here's one of >>> the >>> many publications on the subject. This one is replete with numerous >>> tables >>> and graphical representations of the incremental value of more and longer >>> radials in various types of soil: >>> >>> http://www.ncjweb.com/k3lcmaxgainradials.pdf >>> >>> >>> >>> Tony KT0NY >>> ______________________________________________________________ >>> 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 > ______________________________________________________________ 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
