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Long range rural wireless high speed data options...
On Mar 3, 1:28 pm, (Michael Black) wrote:
"Day Brown" ) writes: No, I'm thinking about 180 mhz, kinda close to TV channel 8, but... out here, the nearest TV channel 8 transmitter is 300 miles away. Besides, TV antennas are being scrapped all the time; everyone is switching to Dish TV. Out in rural areas, RFI/EMI from ham gear no longer bothers anyone watching TV. Besides, seems like there mite be pulse emitters/detectors that work at this speed. No Carrier wave, no IF. Technically, its *NOT* "radio". Ordinary tuners would ignore it; it aint AM nor FM. A 12 db antenna would be about 13' foot long. Awta go 30 miles to an ISP in some town that stays up serving users on the weekends. I've tried all three of the local small town ISPs, which have a nasty habit of crashing on friday nite, and not coming back online til monday morning. Of course it's radio. You'll find that if you aren't radiating a signal, there's no signal and it's not radio. Otherwise, it's radio. And that means licensing and all the rest. And there's a good reason wifi is higher in frequency. Because the bandwidth is there, to allow for multiple signals. Likewise, the shorter range means losts of points can reuse the same frequency, because the range is quite limited. And of course, the higher the bandwidth of data, the more radio space it uses. Move to a lower frequency, and you'll have less chance to control the signal. You may find there's too much interference to other users. There may not be enough radio bandwidth for everyone who wants it. That you don't realize this would be radio is a good indication, like someone else suggests, that there is no solution for you because you don't have the grounding to go anywhere with it. The whole reason there's a problem is that there aint that many users. If there was, DSL would be here. If you drive from Little Rock north thru the Ozarks up US 65 twards Springfield MO, most of the time you can use your cell phone. But get 20 miles east or west of that string of transponders, and its dead even if you are on a mountain, never mind behind a ridgeline, much less down in a creek bottom. For right now, there arent any other users. And even if I get this developed and working, there wont be that many. The population density is low. The biggest town in Van Buren county is Clinton, pop 3000, and in Searcy county Marshall, 1200. And if you drive from Clinton to Marshall, the only town is Leslie, pop 627. Moreover, if you drive up US 65 from Leslie twards Marshall and hit the search button on your FM, it'll find the Christian fund radio station in Marshall. Hit 'search' again, and it'll find.... the Christian fundy radio station in Marhsall. There is dead air all over the TV and radio bands out here that nobody is doing anything with, nor will they ever. Bring a portable TV up here, and the rabbit ear antenna will find two TV channels: 4 & 6; and if you come down off the ridgetop, only 6. I got a 12ft boom Yagi on a 25' mast on the top of a ridge, and all I can get are 2,4,6,7,11 in watchable condition. 16,20,38,42 are too snowy to bother with. Anyone who wants to watch much TV or listen to the radio gets a satellite dish. I'm only 6 air miles from Clinton, but the ISPs to hook up to are all in town, down in the valley with a mountain to get over. CB radio at 27mhz can bend down in there, but anything over 100 mhz looks dubious. Leslie has an ISP up on the side of a ridge, that would be close to line of sight, but I'd havta clearcut about 14 miles of timber to get thru unless I get down to 400 mhz which has a wavelength longer than wet pine needles. Even if I could get over that, the pine grows about 18"/year. One of the reason folks live out here is we like the woods; there's a lot of it. National & state forest, game & fish land, transnational paper loblolly pine plantations and our own private woodlots. None of the commercially available transceivers can punch thru it all, especially when its wet. Looks like there's a problem with my Hughes.net satellite dish when it gets wet too. I called after the last hard rain, over a week ago, they said they'd get a service rep right out. I heard from him on thurs finally saying he'd be out next tues. Its a hundred mile drive, so its not somethign they like to do often. I need a piece of equipment I can maintain myself and deal with the server end when I go to town shopping. Its only been in the last 5 years that Alltel in Searcy county replaced *rotary dial* with touchtone. Til then, the "Welcome Home" community fire dept had a party line. If you know what that is. The sheer backwardness of many rural areas makes low frequency transceivers necessary. I dont blame them; its damn expensive to bury cable when you need 3000' foot per customer. When I first got on line, I hadda run a mile of my own cable. With 12db tuned yagi on each end, I should be able to cover the distance with only a few watts. It aint like it'd be walking on anything anyone else had, and it aint like the FCC is gonna bother sending agents all the way out here to try to find my setup. They couldnt even find jerks in major metro areas putting 1000 watts on a CB channel. We usta hear them walking all over our own neighborhood rigs in the woods. All the folks in town have DSL; that leaves only maybe 15,000 spread out over 1250 sq miles of hills. And of those, with 4/house, less than 4000 PCs that mite possibly want to be online on about 200 acre farms each. Scattered in all directions. With the directionality of tuned Yagi, nobody would be interefering with anyone else's signal. Arent there notch filters that only accept a few megahertz? And pulse detectors that'd recognize clipped sine wave peaks for zero and the normal amplitude as one? |
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