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#1
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I live in a deed restricted community where CB antennas are not
permitted to be erected. I need a low profile antenna - one that will not bring attention to the homeowners association. I want something better than an indoor antenna. I was thinking about one that I can just put out on the grass in my backyard like on a ground plane or something. I want to talk. Any ideas? |
#2
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#3
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![]() "Vinnie S." wrote in message ... On 16 Nov 2005 05:21:44 -0800, wrote: I live in a deed restricted community where CB antennas are not permitted to be erected. I need a low profile antenna - one that will not bring attention to the homeowners association. I want something better than an indoor antenna. I was thinking about one that I can just put out on the grass in my backyard like on a ground plane or something. I want to talk. Any ideas? 1/2 wave wipole in a tree. Vinnie S. I second that motion. Use Bury-Flex cable to the tree. Not only can it be buried, critters will not chew on it, and it is a top quality cable with very low loss. Best of luck! Chad |
#4
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I thought about a 18 foot Dipole between my trees but my neighbors are
very nosy. Perhaps I can secure the Dipole on my roof. |
#6
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On 16 Nov 2005 13:15:57 -0800, wrote:
Where can I buy this stuff? http://cgi.ebay.com/Indoor-Dipole-CB...QQcmdZViewItem Use 100% shielded coax like Belden 9913 or equiv, to minimize TVI Or if you want to build it yourself: Or calculate here using 27.200 MHz as a center frequency http://www.scanshack.com/antcal.htm#dipole or http://home.att.net/~wizardoz/cbmw/antenna_fabri.html Coax Cable Vertical CB Antennas For a quickie CB antenna, a vertical dipole (1/2) wave can be made right from the coax itself You take your coax and very carefully, without nicking the braided shield, strip 102 inches of the outer insulation jacket off one end. After removing the outer jacket, start bunching the shield down the coax from the end. Now, where the outer jacket and the shield meet, separate the braided shield enough to get the inner conductor out through the hole in the braid. Pull all of the inner conductor through and stretch it and the braid out. Be careful not to skin any of the insulation off the inner conductor. Now attach an antenna insulator to the end of the inner conductor. Measure the braided shield. Cut it off at about 106" and attach an antenna insulator to the end. The total length of the inner and outer conductor should be about 17 feet (1/2 wave). You can haul it up to any height you want with a string or rope attached to the insulator on the center conductor. It's a good idea to coat the end of the coax cable where it separates with some kind of waterproof sealer. This keeps water from seeping into the coax, which could cause a high SWR. Just attach a coax connector on the end of the coax going to your transceiver and you are on the air. The SWR should be 1.5 or better, if cut to the proper length. It'll get out about as good as a ¼ wave ground plane CB radio antenna if you get it up high and in the clear. Do not hoist this antenna up next to a metal pole, because the metal will interfere with the antenna's operation and cause a high SWR. Vinnie S. |
#8
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Vinnie S recommended the Dipole in the link below. The only thing is I
dont know if it can it be used outdoor. Its insulated so I dont see why it cant be. http://cgi.ebay.com/Indoor-Dipole-CB...QQcmdZViewItem Im thinking that I would install it on my roof toward the back of the house in the "T" configuration as you recommend tying the ends down to the sides of the house like in the eaves under the garage. Then Im thinking to run the coax back on either side of the Dipole, down the corner of the house where it will go into the house. It will be out of the sight of the home owners association people. |
#9
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They are mature trees but now I came up with another idea. Read the
KAXN-9546 thread below. Id love to DX but my options are limited. |
#10
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On 17 Nov 2005 04:59:07 -0800, wrote:
Vinnie S recommended the Dipole in the link below. The only thing is I dont know if it can it be used outdoor. Its insulated so I dont see why it cant be. http://cgi.ebay.com/Indoor-Dipole-CB...QQcmdZViewItem Im thinking that I would install it on my roof toward the back of the house in the "T" configuration as you recommend tying the ends down to the sides of the house like in the eaves under the garage. Then Im thinking to run the coax back on either side of the Dipole, down the corner of the house where it will go into the house. It will be out of the sight of the home owners association people. You can use it outdoors, easily. You must seal the coax feed so water and ice don't get in at the feed point. It is perfectly ok if either leg of the dipole gets wet. Also, like Chad said, make a balun, which is a coiling your coax right before the feed point. The coax should be coiled 10 turns in a 6 inch radius. And use 100% sheilded coax. I use Davis Bury-flex. LMR-400 is good, but very stiff. Belden 9913 is good, but not as good outdoors as the Bury-Flex. If you was to save some money, just use the coax itself as the dipole. Once you separate the center wire from the braid, that is the star of you dipole. That needs to be about 102-104 inches long. The center wire is easy, but separating the braid is a pain in the ass. So cut about 1 inched of braid, and solder a wire to the braid, like 14 gauge from Home Depot. Remember, the length should be cut long, and then cut shorter to match up and get low SWR. Is alwasy easier to cut shorter, and to make longer. Vinnie S. |
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