I recently started to learn how to use W7EL's Eznec antenna modeling program so I decided to try to model the 43' vertical. I don't quite see the magic but a 4:1 un-un looks like it will bring the impedance into reason for 80, 40, 14 and 18. The antenna resonates at 5.7, 16.7 and 28 MHz.
I posted the SWR and a couple of elevation plots at www.ke7x.com (click on The 43' Vertical). 73 all, Fred KE7X Fred Cady fcady at ke7x.com "The Elecraft K3: Design, Configuration and Operation" www.ke7x.com > -----Original Message----- > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > boun...@mailman.qth.net] On Behalf Of K4SC > Sent: Sunday, September 18, 2011 4:51 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 Internal Tuner and 43' Vertical > > I ran my K3 with internal autotuner on the DX Engineering 43' fast- > taper > vertical with their 4:1 UNUN with excellent results on 40 meters and > up. I > tried a couple of local qso's on 75 and it worked ok, but I was only > running > 100watts on a KW band. I tried loading on 160 meters and think it did > load, > but the QRN was so bad I never tried to make any contacts. > > This was all at my Arizona QTH where the vertical was my only option. > I > replaced my Butternut vertical with the 43' vertical and definitely > thought > it was the better antenna. Ground field was poultry netting spread out > in > an X pattern about 30' on each side. If I could hear it, I generally > could > work it. Again all done with 100Watts. You refer to the Elecraft > tuner for > the KPA-500, I don't know there is one, yet. > > Good Luck > > Chuck K4SC, York SC > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/K3- > Internal-Tuner-and-43-Vertical-tp6805633p6806800.html > Sent from the Elecraft mailing list archive at Nabble.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
