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writes: > I have been up and down my tower like a yo yo and can not get the swr = > down on 40 .Have moved the tuners in and out ,but swr still 5 to = > 1..Changed the feed line to the Wireman 1:1 balun and no help there,not = > really sure what the distance should be on the phone part of the = > band,had it at 18 in. and in to 5 in..The only other thought I had was = > maybe the new Balun could be bad? The other bands are great,any = > thoughts?? It's been my experience that when the swr is high everywhere and it's not acting like an antenna (no discernible dip anywhere) that it's a feedline problem. Are you checking the swr directly at the end of the feedline? MANY antenna "problems" have been traced to bad jumpers, bad switches, etc. in the shack. There are only a couple of things in the system - antenna, balun and feedline - so by eliminating each one, you'll find the culprit. Have you tested the antenna AT the feedpoint? I have a PL259 with two short jumpers and alligator clips to attach directly to the feedpoint. If the antenna acts like one at that point, then plug your analyzer into the balun. If it looks okay there, then test the feedline. Since you've already changed it, you should be getting close. I've always had the F12 linear loaded antennas have a dip somewhere so unless there was a mistake in building the antenna, I'd say the problem is elsewhere. The problem with a balun is that there is no way to test one. You have to substitute one to see if it worked or not. Cheers, Steve K7LXC Tower Tech -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact force12@qth.com |
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