Anyone have CB's?
#11
07-25-2012, 11:27 AM
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#12
07-25-2012, 12:01 PM
Legend
In regards to the "Cedar Hill Antenna Farm"'s close placement of towers,
Originally Posted by AK Dart
The towers are far enough apart to prevent disruption in the stations' coverage patterns. There is little or no interference or intermodulation between digital television stations because the signals are tightly filtered and anything outside their 6-MHz channels is 100 or 110 dB down. That's what makes it possible now to have adjacent TV channels coming from the same antenna farm, whereas in the analog days the only adjacent channels were 4 and 5 (because there is a gap between the two), 6 and 7 (big gap), and 13 and 14 (huge gap).
Originally Posted by AK Dart
The advantage of the candelabra is that several TV stations can share a large tower and have the same height above ground. It also helps make the radiation pattern more omnidirectional, because it's better to have another antenna support 75 feet away than to mount the antenna on the side of the tower. Especially at UHF.
Of course, many AM radio stations use several towers in close proximity, intentionally interacting with each other to produce an antenna pattern that conforms to the areas they want to cover, and more importantly, protecting the other stations on the same frequency that have been on the air longer. A few very old stations like WBAP are non-directional day and night and don't have to protect anybody. One interesting case in Dallas is KRLD, which protects a station in Hartford, Connecticut at night. Another oddball is 1190, which has separate day and night transmitter sites.
Of course, many AM radio stations use several towers in close proximity, intentionally interacting with each other to produce an antenna pattern that conforms to the areas they want to cover, and more importantly, protecting the other stations on the same frequency that have been on the air longer. A few very old stations like WBAP are non-directional day and night and don't have to protect anybody. One interesting case in Dallas is KRLD, which protects a station in Hartford, Connecticut at night. Another oddball is 1190, which has separate day and night transmitter sites.
http://www.firestik.com/Tech_Docs/SNGL-or-Dual.htm
http://cbradiomagazine.com/May%20200...everything.htm
Last edited by magnethead; 07-25-2012 at 12:06 PM.
#14
01-13-2013, 03:46 PM
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#15
01-16-2013, 04:45 PM
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#17
01-21-2013, 11:43 AM
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I have a small Cobra mounted next to my gear shifter. I ran into the same issue with my Dakota because I have a manual as well and couldn't really find a good place to mount it. After some thought, on the side of the the gear shift was best for me. Its worked out pretty well for me. It is a pain trying to put the mic back on at night but its not bad at all, get used to it. I've always used dual antenna whips and haven't had any issue with signal.
