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About two weeks ago, the day before I went on holidays, as usual, I disconnected all antennas from my radios. (This allow me to have a more relaxed vacation :0) Without coincidence, later that same day, very dark clouds sudenly appeard and promised a storm. But despite some rain drops, no thunder or lightning was observed. However a (very) wierd thing was noted: when those dark clouds were forming, on my back yard a strange sound come out of no where! First it sound like a "clik", but then sounded more like a "chirp". The cadence wasn't constant, but during a brief period it was less than a second, like: "chirp-chirp-chirp". I look around for the source of the sound and it lead me to my new self suported 15m tower. On top there are 3 antennas: 5 elem 6m and 21 elem 2m yagi from Tonna, and a Force 12 C4XL. I was about to climb to the top to check exactly the origin of the sound, but for obvious reasons I gave up the idea. Even so, I'm preety sure the sound came from the C4XL. But I don't understand why! I never have "seen" this kind of efect on an antenna. Have you? Do you have a reasonable explanation for this? If you, I really apreciate your help. Thanks in advance. Best 73 F.Costa, CT1EAT http://www.qsl.net/ct1eat P.S. FYI the tower has a good earth (8.9 Ohm, last measured) -------------------------------------------- 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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