déjà vu all over again..... I have worked Japan on my oil filled dummy load on 10m during the peak. That does not equate to a great antenna. You can tune just about anything does that mean it is a great or efficient radiator, no. If it is the best you got great. If you were using an ISOLOOP sure the 43ft antenna will probably sound pretty dog gone great.
If you want to be humbled, visit a local contest superstation with big ole stacks or 4 squares. Most of us can't build a superstation so we have to make compromises. All that really matters is that you are happy with what you have. "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Steve Ellington Sent: Sunday, March 15, 2009 1:04 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] 43' Vertical and the K2 tuner So we've rediscovered the Gotham V80 Vertical! Steve Ellington n...@carolina.rr.com ----- Original Message ----- From: "Ron D'Eau Claire" <r...@cobi.biz> To: <elecraft@mailman.qth.net> Sent: Sunday, March 15, 2009 2:21 PM Subject: Re: [Elecraft] 43' Vertical and the K2 tuner > Dr. Megacycle has it on the head with the length: 22 feet is 5/8 wave on > 10 > meters. > > Good "commercial" automatic tuners will feed such an antenna all the way > down below 80 meters. The SGC-230 is commonly used on ships feeding a 23 > foot whip all the way down to the emergency SSB frequency at 2182 kHz. > > Many published tests have shown that getting the radials away from the > ground is *very* beneficial and may well outweigh the loss of efficiency > in > reducing the height of the vertical. Back in '87, A. M. Christman, KB8I, > published the results of studies he conducted in the Proceedings of the > Third Annual Review of Progress in Applied Computational Electromagnetics > for the U.S. Naval Postgraduate School, which he later summarized for hams > in an article in the Aug 1988 issue of QST. That article is available to > ARRL members on their web site. It gives numerous examples of the > improvements to be expected as various counterpoise systems are used above > ground. > > Let me point out to anyone interested enough to read my previous post that > I > misspoke. It was kindly brought to my attention by Arnie, PA3A, who > observed > I said a half wave radiator has a high radiation resistance when I meant > to > say it had a high feed point impedance. My conclusion was correct as to > the > benefit of a high feed point impedance, but there's a huge difference > between the resistive value of the feed point impedance and radiation > resistance! > > Ron AC7AC > > > ______________________________________________________________ > 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 ---------------------------------------------------------------------------- ---- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.13/2001 - Release Date: 03/14/09 06:54:00 ______________________________________________________________ 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
