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On Tue, 25 Sep 2007 17:18:16 -0400, "Reginald P. Smithers III"
wrote: Short Wave Sportfishing wrote: On Tue, 25 Sep 2007 16:40:58 -0400, "Eisboch" wrote: "Larry" wrote in message ... John H. wrote in : Another question: Most antennae seem to come with about 20 feet of wire. Mounted on a console with the radio right there, I could get by with about 3 feet of wire. Is all the extra wire necessary? No, it's not. If you're not a solderer, find someone who can put a new connector on the radio end of your cable or make up a new cable. The Metz does NOT have a cable attached to it....one of its great features. YOU put the cable on it so the cable can be replaced....not hard wired into the plastic, like the little whips from Shakespeare come. The farce of "tuning" the antenna with cable length is nonsense.... True, you don't "tune" the antenna with cable length, but you need a certain amount of it to properly tune the antenna. My memory is rusty and I'd have to go dig out the books, but I think you should have a 1/2 wavelength or so in cable length. Maybe it's a 1/4 .... can't remember. Too short will cause the antenna not to load properly (assuming it is the correct length) and result in an excessive SWR value that reduces effective transmitted power and, in the worst situation, cause damage to the output stage of the radio. If you have matching problems with the antenna and are fairly certain that the antenna, connectors are known good and the radio is presenting power properly, then the suspect is the length of the feedline. End result - you trim the feeline to bring the antenna to the correct match. Thus you are tuning the antenna using the feedline. That's why God invented antenna tuners. :) That is the beauty of rec.boats, even when you think every possible boating discussion has been beat to death, a new informative topic will arise, that we can learn from. Of course, we will beat this one to death. ROTFL!!! |
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