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#21
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Digital TV Antenna Design
"Cecil Moore" wrote in message
... Are the GPS coordinates for the transmitting antenna available anywhere? I called the local TV station and they don't know the coordinates for their transmitting antenna. They used to be able to be found in the FCC database. I recall when a digital station in Kingsport, TN, first went on the air several years ago, I looked up the data on location. The FCC even had the antenna pattern on file. -- 73, Dr. Barry L. Ornitz WA4VZQ [transpose digits to reply] |
#22
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Digital TV Antenna Design
Dr. Barry L. Ornitz wrote:
"Cecil Moore" wrote in message ... Are the GPS coordinates for the transmitting antenna available anywhere? I called the local TV station and they don't know the coordinates for their transmitting antenna. They used to be able to be found in the FCC database. I recall when a digital station in Kingsport, TN, first went on the air several years ago, I looked up the data on location. The FCC even had the antenna pattern on file. www.fccinfo.com will give you an aerial photo of the transmitter site. |
#23
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Digital TV Antenna Design
On Mon, 16 Feb 2009 15:55:39 -0800, dave wrote:
Jeff Liebermann wrote: On Mon, 16 Feb 2009 12:32:51 -0600, Cecil Moore wrote: Are the GPS coordinates for the transmitting antenna available anywhere? I called the local TV station and they don't know the coordinates for their transmitting antenna. Sure. It's on the FCC page for the station. Start he http://www.fcc.gov/mb/video/tvq.html Inscribe the call sign in the call sign box. For example, this is the results for KNTV: http://www.fcc.gov/fcc-bin/tvq?list=0&facid=35280 The Cavell Mertz web page does a much more elegant job than the FCC's: http://www.fccinfo.com/CMDProEngine....Number=1087036 The info is identical. Agreed. I just noticed that they have a link to a Google Earth map of various services: http://www.fccinfo.com/fccinfo_google_earth.php Oh swell... Google Earth crashed while trying to view everything at once. Oops. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#24
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Digital TV Antenna Design
"Cecil Moore" wrote in message ... snip Are the GPS coordinates for the transmitting antenna available anywhere? I called the local TV station and they don't know the coordinates for their transmitting antenna. -- 73, Cecil http://www.w5dxp.com This thread got a little tangled. If, as I think, you're asking for coordinates for a US station, try, http://www.fcc.gov/mb/video/tvq.html 1. Enter the call letters for a known station. KLTV might be a good one. 2. Press Enter or scroll down and click Submit Data. 3. On the following page, click the station call letters. If a station has more than one listing, click any of them, as they all lead to the same web page. 4. On the next page, scroll down, observing the different documents issued by the FCC for the station. They may have a "TV" license for analog, also have a "DT" license and/or a DT Construction Permit. KLTV has seven irons in the fire, those busy bees. 5 Each one of the entries for a different document provides specifics for the installation (or proposal) document. You will see ERP, transmitter location, antenna height above ground, above average terrain and above sea level. There are links to area maps, including a coverage map. (For an agency that wants its licensees to toe the mark, this FCC database is not free of errors. If the given locations are, in fact, correct, your desired coordinates are provided to the arc-second, about 100 feet.) Here's a quick sample: Licensee: KLTV/KTRE LICENSE SUBSIDIARY, LLC Service Designation: DS Special Temporary Authority (digital) Channel: 10 192 - 198 MHz Application File No.: BSTA-20060217AAS Facility ID number: 68540 CDBS Application ID No.: 1115172 32° 21' 6.50 " N Latitude 95° 15' 59.20" W Longitude (NAD 27) This website accepts data query in a variety of formats. Interesting to enter a LAT/LON and a distance (in km). The website returns all stations within that distance. (Some may be low-power translators aimed away from you, thus useless.) |
#25
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Digital TV Antenna Design
"MTV" wrote in message ... Bill Bowden wrote: Anybody have a good antenna design for the new UHF digital TV stations? I get reasonable results from my old VHF/UHF antenna (55% signal strength) , but it's big and ugly, and I want to replace it with a smaller, more efficient UHF design (maybe a Yagi) I can construct at home. Anybody know the dimensions of such an antenna, probabaly in the frequency range of 400-800 Mhz ? -Bill You could just cut off the long VHF elements and use them, cut to UHF size, to extend and increase the number of director elements. MTV Yes. I have a seven foot TV parabola on my roof, but my next-best antenna is an absolute piece of junk, literally. My neighbor was throwing out an all-channel antenna that was blown down in a storm and badly damaged. I clipped the connections between the UHF & VHF sections and hacksawed off the mostly undamaged UHF section (12 directors, I think). With a section of pipe rudely jammed into the boom as a counterweight, I'm pulling in stations 125 miles away almost as well as with the parabola. Turning other people's discards into functional devices is an art. (I'm the guy who worked Hawaii on 20m with 100 Watts into an extension ladder. ... and no, I wasn't feeding it with ladder line.) "Sal" (KD6VKW) |
#26
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Digital TV Antenna Design
"Sal M. Onella" wrote in message ... snip coordinates for a US station, try, http://www.fcc.gov/mb/video/tvq.html For many people, the Cavell Mertz site beats the pants off the FCC site I posted. It must use the FCC raw data, since I see it has a long-standing FCC error, KFMB-DT on Channel 55. They moved to Channel 7 (interim) last summer. "Sal" |
#27
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Digital TV Antenna Design
Sal M. Onella wrote:
"Sal M. Onella" wrote in message ... snip coordinates for a US station, try, http://www.fcc.gov/mb/video/tvq.html For many people, the Cavell Mertz site beats the pants off the FCC site I posted. It must use the FCC raw data, since I see it has a long-standing FCC error, KFMB-DT on Channel 55. They moved to Channel 7 (interim) last summer. "Sal" fccinco.com is a third party front-end for the FCC Query database. When you submit a search Cavell Mertz submits a query to fcc.gov. There is a little report at the bottom of the page. |
#28
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Digital TV Antenna Design
Ian Jackson wrote:
It's pretty hard to keep secret the location of (say) a 1000 foot TV transmitter mast! Not much of a T-hunting challenge, is it. :-) ac6xg |
#29
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Digital TV Antenna Design
On Feb 15, 6:59*pm, Bill Bowden wrote:
Anybody have a good antenna design for the new UHF digital TV stations? I get reasonable results from my old VHF/UHF antenna (55% signal strength) , but it's big and ugly, and I want to replace it with a smaller, more efficient UHF design (maybe a Yagi) I can construct at home. Anybody know the dimensions of such an antenna, probabaly in the frequency range of 400-800 Mhz ? -Bill All my antennas for DTV and analogue are Quads and Quagi antennas. A two element Quad for channel 2 and 5 VHF(its wideband enough for this), a three element for channel 11 VHF and a 9 element Quargi for channel 63 UHF. Thats all the TV stations we have here on the island. Easy and cheap to make and they perform like hormones IMHO. My non technical wife says they and the array looks like a Christmas tree, therefore not ugly but cute -) Need more info... Tons on the Inet or let me know. Chris |
#30
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Digital TV Antenna Design
On Feb 16, 10:35 pm, "Sal M. Onella"
wrote: "MTV" wrote in message ... Bill Bowden wrote: Anybody have a good antenna design for the new UHF digital TV stations? I get reasonable results from my old VHF/UHF antenna (55% signal strength) , but it's big and ugly, and I want to replace it with a smaller, more efficient UHF design (maybe a Yagi) I can construct at home. Anybody know the dimensions of such an antenna, probabaly in the frequency range of 400-800 Mhz ? -Bill You could just cut off the long VHF elements and use them, cut to UHF size, to extend and increase the number of director elements. MTV Yes. I have a seven foot TV parabola on my roof, but my next-best antenna is an absolute piece of junk, literally. My neighbor was throwing out an all-channel antenna that was blown down in a storm and badly damaged. I clipped the connections between the UHF & VHF sections and hacksawed off the mostly undamaged UHF section (12 directors, I think). With a section of pipe rudely jammed into the boom as a counterweight, I'm pulling in stations 125 miles away almost as well as with the parabola. Turning other people's discards into functional devices is an art. (I'm the guy who worked Hawaii on 20m with 100 Watts into an extension ladder. ... and no, I wasn't feeding it with ladder line.) "Sal" (KD6VKW) I found an old 5 element yagi cut for channel 52 which was used years ago for a pay TV station called "ON TV". It has 3 (10.5 inch) directors spaced apart 5 inches, one (12 inch) reflector and the driven element is about 11 inches. The diameter of all elements is a little larger than a coat hanger. Wondering what the bandwidth would be for other UHF stations below and above 52? And is there an easy way to modify it for wider band? I also need to get the high VHF band for channel 7-13, so maybe one more reflector is needed? -Bill |
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