In addition to AD5X's excellent work, anyone considering installation of a 43' vertical should first read Owen Duffy's (VK1OD) well-researched information, especially his information concerning feed-point alternatives:
http://vk1od.net/antenna/multibandunloadedvertical/index.htm One reason for the 43' vertical's popularity is that typical radiation resistance is better than 100 ohms on 40m-10m -- but falls to less than 10 ohms on 80m and much lower on 160m. On 160m/80m, system losses typically drop nearly in half with an ATU placed at the base feed when compared to a 4:1 current balun feed with ATU at the transmitter. Paul, W9AC ----- Original Message ----- From: "Julius Fazekas n2wn" <[email protected]> To: <[email protected]> Sent: Tuesday, March 22, 2011 12:51 PM Subject: Re: [Elecraft] K3 & S9 43' Vertical > Hi Tom, > > Check out Phil's, AD5X, site: http://www.ad5x.com/articles.htm > > He has written a number of articles related to your questions. Good > information with plenty of "how to" ideas with locally found materials. > > Elecraft's Balun kit is also capable of 1:4 unun and will easily work with > any 100 watt rig. > > QST has had several items related to the ubiquitous 43' verticals that are > all the rage now. I see at least one person has mentioned radials, which > are > a must have to effectively use this antenna on 80-30. > > The K3's ATU is very effective, but keep in mind that you will be matching > the feedline and antenna as a unit, versus matching just the antenna. The > K3 > will most likely find a match most of the time, but you still could be > seriously mismatched at the antenna. It may work, it just won't work well. > > GL es 73, > Julius > > ----- > Julius Fazekas > N2WN > > Tennessee Contest Group > http://www.k4ro.net/tcg/index.html > > Tennessee QSO Party > http://www.tnqp.org/ > > Elecraft K2 #4455 > Elecraft K3/100 #366 > Elecraft K3/100 #1875 > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/K3-S9-43-Vertical-tp6193993p6197137.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
