At 11:45 PM 11/7/01 -0600, Harmon Seaver wrote: > Go tell that to the Seattle/Portland/wherever wireless people. Or the >people in rural MN who are putting them up on silos and running a 10 mile >radius. Totally depends on your topography. And even with p-p they aren't >doing parabolics, more like yagi directionals, which could be just another >TV antenna, cut to the harmonic. > Gee, maybe they'll start raiding home with TV antennas. >
The pages about 'pringle's chip canister yagis' show a piece of plumbing PVC enclosing the final package, a tube about the size of an arm. It doesn't look like a TV antenna, more like the microwave uplinks (Funny that.) from mobile tv vans, though those are usually helical. So the Ghz yagi is readily hidden. The 802.11 hacks claim a good 15 db with a homemade yagi. I think the RF deal is that you can't scale a yagi as far as you can a dish -past some number of segments the yagi doesn't give you more, but a dish keeps on giving (Areceibo for instance...) if you have the space for it and can take the wind.
