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swr goes up on antenna
On 12/18/2014 2:12 PM, Channel Jumper wrote:
I'm not quite sure, but I don't think that it is legal, according to the Part 97 to transmit a carrier without saying anything. FCC demands that you must issue your call sign within the period required after beginning your transmission as he did. One other thing - as Columbo would say, the SWR meter does not indicate resonance, it only tells you what the feed line tells it. By changing the length of the coax you can make the antenna appear as being resonant or non resonant, even though the antenna may or may not be a perfect 50 ohm load. Your first sentence could be construed as accurate, depending on accepted terminology. Your second sentence is inaccurate and is in conflict with your first sentence. Instead of taking down the antenna and looking at the components, you chose to visit this forum and ask us to look into our crystal ball for a solution to your problem. I'm thinking you do not have such a crystal ball or you would have used it show your superiority over everyone else here. There is no way for sure for us to know how the PL connectors were installed, the condition of the coax you used for a feed line, the condition of the coax you used to build the antenna and the soldered connectors in between each and every junction. Who is "us"? You have someone sitting beside you? So, you want his problem handed to you(and the person next to you) on a platter? You don't really know how to help him, in other words. ONE guess would be that you have a intermittent loose connection and today it chose to work and tomorrow when it rains, snows, wind blows etc, it might not make contact and present a high swr as you put it. Perhaps, as you put it. Can you suggest some tests that might be helpful for him? How would you suggest making tests or measurements that you think could be problems? Find someone with an antenna analyzer to diagnose your problem for you. Oh yeah! And learn nothing in the process. You would be standing around for weeks with an analyzer in your hands waiting for the first sign of intermittent connections. Then what? Your measurements have already told you have a problem. Forget that Channel Jumper non-ham idiot. You are much more capable than him. Try some more things and report back. Shake your feeder (you know what I mean) and have someone watch your meter. Look at each end of both the feeder and antenna to make sure you have no corrupted insulators or limbs touching. With a digital ohmmeter, you can measure resistance across the insulators (power off, of course). The idea is: can I find a way to measure something using what tools I have to give me a lead to the problem? Keep looking. The group would love to help, I'm sure. There are lots of gurus here. Good Luck! |
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