When I was going to engineering school one of the toughest courses was wave theory. The course included a lot of antenna studies. Not to brag, but I got the highest grade on the final. It was 45. That was the highest mark in the class and thank goodness the course was graded on a curve. I asked the professor if anyone ever received a passing grade not using grade curving. His response was.....I have been teaching the class for 10 years and nobody ever got as high as 70. My point is that antenna theory is a complicated study and the study of vertical antenna theory is more complex since we have the ground as an important factor in most cases. So I caution anyone to do your research and do not listen to "old wive's tales" about specific antenna installations. 73deGeorge, W6GFProduct owner of a ZEROFIVE 43 footer
--- On Tue, 3/22/11, NZ0T <[email protected]> wrote: From: NZ0T <[email protected]> Subject: Re: [Elecraft] K3 & S9 43' Vertical To: Date: Tuesday, March 22, 2011, 8:41 AM I have an S9 43' vertical. You will need the unun to match 60 meters and up. The 80M coil works well too. I ended up building the matchbox that Phil AD5X designed. You can see his article here: http://www.ad5x.com/images/Articles/Match160.pdf Phil also has a nice presentation on the 43' antenna here: http://www.ad5x.com/images/Presentations/Vertical43.pdf It's a great antenna if matched properly. It must be matched at the base with a remote tuner, an unun, or coil to work properly. The unun (on 60M and up) keeps the SWR down to manageable levels that you can match with a tuner in the shack with acceptable coax losses. The SWR gets out of hand below 60M and must be matched at the base. 73 Bill nz0t -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-S9-43-Vertical-tp6193993p6196827.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:[email protected] 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
