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On Fri, 21 Nov 2003 10:37:02 -0800, "A.Pismo Clam"
wrote: ... I have not read the document in question, but it does sound too good to be true. Such feelings are generally indications of dreaming. In essence he says that the: "...[Federal] government will defend your right to crawl up on the roof and put up a BIG, HONKING antenna..." The government will DO NOTHING! Which means you won't get arrested. The converse notion of their helping is dreaming in technicolor. Want to know how? Here is the URL: www.fcc.gov/mb/facts/otard.html Now you may have to prove to "the opposition" that the antenna you have erected can indeed receive "local" television stations, but that should not be that difficult to do... Hi Pismo, Big honkin' antennas? This completes the picture with dreaming in surround-sound: (1) A "dish" antenna that is one meter (39.37") or less in diameter (2) An antenna that is one meter or less in diameter or diagonal measurement (3) ... Masts higher than 12 feet above the roofline may be subject to local permitting requirements. Such interpretation of the law, while asleep, has created a vast culture of lawyers who are willing to do follow-up work. The trick is to design your antenna to within the law. 1. Choose the highest point of your roof line and erect the allowed 12 foot mast; 2. Place suitable dish or simple TV antenna (remember, local means no 40 element booms); 3. Run your favorite coax STRAIGHT UP (as nearly you can) to the top; 4. Ground to radial system and AC earth ground at bottom; 5. Gamma match to coax shield at the bottom (hidden). Antenna does not have to be functional. It only needs to look functional (do not point at the northern star, Polaris, for example). If it is functional, you may need to provide for a choke at the feedpoint to the antenna (to separate the two functions - your hobby from your TV). Try to place this effort away from major home interference sources (TV's and computer monitors, fish tanks, fluorescent fixtures, and so on). To extend the service frequencies in the HF region (because the mast is still too short), then add guy wires attached at the top electrically and physically, which are insulated about halfway down with egg type insulators, or use rope the rest of the way to ground. This top-load skirt may also serve as the choke, but don't count on it without figuring in the time to experiment and confirm. 73's Richard Clark, KB7QHC |
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