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On 16 June 2010 16:53, Gordon Henderson <gordon+dcglug@xxxxxxxxxx> wrote: > However, directional and high gain antennae is the way to go. Longest Wi-Fi > link we ran was 6.5 miles from a 12db omni to an 18bd grid antennae. That > was clear line of sight though, and those antennae were expensive a the > time. (We also ran a 17.5 mile 10Mb link but that was on posher kit with a > 2' dish at either end) I'm interested in antenna and learning what all this "12db", "omni" jargon means. :-) > Is it clear line of sight? If so, then a pair of good Wi-Fi access points > acting in bridge mode might just work. (And even if you do have line of > sight, lookup fresnel zone - it'll be a factor at that distance) It's not quite line of sight (hill rise), but I was hoping to experiment with a mast or something. > I'd go back to the Wi-Fi access points in bridge mode. Trouble is, as I > found out recently, most are over 50 quid when bought without an adsl > router! And then, what do you do with one that has 2 antennae? Which one do > you pick to plug the directional antennae into? And then there's the cost of > the directional antennae to connect to it, and cabling - basically I think Lets assume I have 2 dd-wrt flashed WRT54GLs to play with. I need to connect them. What antennae do I need exactly? Hopefully two directional antennae attached to each will allow good communication. I don't want high power since I want to connect the sheevaplug to a car battery. As I said I don't know too much about antennae, so be easy on me. Thanks for your input! p.s. incidentally I'm hoping to set a little weather station (only have a USB thermometer) and a bluetooth scanning service on the A30. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html