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writes: > My C3E, which was working great, all of a sudden developed SWR of 3:1 on > all bands and throughout all bands. (no dip varying the freq). Visually, > all elements are in place, wires out of balun are still connected.. > > It is at 9,000 ft. in Colorado, so no corrosion or salt. We have not had > any lightning yet either. It has been up only 2 years. > > The only think I can think of is the balun. The ant. is at 100 feet on top > of a 40 mtr beam, it is not possible to get at and inspect. It will have to > be lowered. I thought If I have a crane lower it (put it up that way and it > was easy) I would like to be able to repair and get back up while crane is > still available. > > I have replaced the coax to the shack.. High swr everywhere indicates a feedline problem. If you're sure the coax and joints are okay, then the only thing left is the balun. Did you check the antenna at the end of the feedline directly? Sometimes something in the shack (i.e. switch, jumper, meter, etc.) is TU but the antenna is okay. Eliminate everything you can before blaming the balun. What kind of balun is it? I've had excellent luck with the F12 B-1's. Cheers, Steve K7LXC TOWER TECH -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |
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