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On Mon, 17 Feb 2014 18:04:16 -0500, Fred McKenzie
wrote: In article , Jeff Liebermann wrote: I hate to admit it, but I think I've built them backwards over the years. Maybe that's why J-poles have such a lousy reputation and why I think they suck? Please pardon my ignorance. I understood that a J-Pole is a half wave antenna connected to a quarter wave stub. The transmission line is connected to a low impedance point (50 Ohms?) on the stub. Yep, something like that. In the literature, it is usually fed as an unbalanced antenna, but it is not. Therefore, it should not matter which side has the center conductor or shield - they are both wrong! Fred K4DII Well, if it really were a balanced feed, I guess(tm) there should be no difference in the pattern, gain, VSWR, etc between the two unbalanced methods of feeding the antenna. Yet the author of the original article shows large differences in the antenna models. See Pg 10 thru 13: http://www.cvarc.org/tech/antenna_myths/antenna_myths.pdf -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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