DX Engineering shared an antenna with me that I put up and it works wonderful on all bands with a tuner. 120 ft and fed with 90 ft of 300 ohm line into a 1:1 balun of theirs and into the tuner with RE 213. Tuner is a Palstar AT2K. The feed line length must be 90 feet. YES, it really works.
Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 K3 #1605 CCA 98 00827 CRA 1701 W9DVM -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of dw Sent: Tuesday, July 14, 2009 12:26 PM To: Elecraft_List Subject: [Elecraft] The use of a doublet Great post Rick! Yes, the doublet has been over the years for me the easiest and best performing all band single antenna I've ever had. I feed mine with 450 also, but the top is only 135' long. I use the more robust SGC auto-tuner in external config. 40 feet of good quality coax and a high quality balun feed the tuner. With 20 watts applied, it finds best match in 3 seconds. It makes me feel like I'm cheating!! ;^D Duane N1BBR Hello Jim, I saw two of those tape measures once and they were actually part of a military dipole antenna system. The original antenna had 2 of them and you just pulled them ou to the coresponding frequency measurements on each side and you had a resonant dipole for that frequency. So if your friend used that to measue the wire with, then its most likely somewhere around 33 feet on each side. Being fed with 300 ohm balanced feedline makes your antenna a doublet - and a doublet is a very good all band antenna ! I use a doublet here that is 178 feet long - 89 feet per side and fed with 450 ohm feedline and it works 10 thru 160 meters via the tuner. 73 - Rick McKee, KC8AON Southern Ohio - EM88sn www.angelfire.com/electronic2/qrp With God all things are possible ~ ><(('> ~ -- [email protected] ______________________________________________________________ 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
