[Hidden-tech] extended range wifi needed

Kiernan G-S greenearthcomputer at gmail.com
Tue Jul 5 20:23:36 EDT 2011


Directional Antenna may do what you are looking for?

Hawking actually makes some good stuff for this:
http://www.amazon.com/Hawking-Directional-Antenna-outdoor-HAO14SDP/dp/B000B59J8I

There are also some useful dish antennas:
http://www.amazon.com/2-4GHz-Square-Parabolic-Antenna-24dBi/dp/B000V0ONTI/ref=sr_1_15?s=electronics&ie=UTF8&qid=1309911567&sr=1-15

I have actually seen people have surprisingly good luck with a pringles can
and an existing wireless antenna:
http://www.turnpoint.net/wireless/has.html
http://www.oreillynet.com/cs/weblog/view/wlg/448

Easy and cheap and directional.

Kiernan Gulick-Sherrill

Green Earth Computers
www.greenearthpc.us
kiernan at greenearthpc.us
413-282-TECH
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Member: Business Networking International (BNI)
Mill River Chapter: visit http://millriverbni.com



On Tue, Jul 5, 2011 at 7:44 PM, Dan Nachbar <dan at nachbar.com> wrote:

>   ** Be sure to fill out the survey/skills inventory in the member's area.
>   ** If you did, we all thank you.
>
>
> I have an "off the grid" wifi application (it's for
> realtime data collection) where conventional wifi
> doesn't have quite enough range.
>
> I need about 700 feet, outdoors, generally unobstructed,
> and line of sight. There are four data collection locations.
> Each data location needs to connect to a central location.
> All of the data locations are within about 180
> degrees of azimuth with respect to the central location.
> I don't have the option of putting repeaters between the
> central location and the data points.
>
> I've tried several amps and antennae from several different
> web stores but they don't seem to do much better than
> the little "rubber duck" antennae on the usual boxes.
>
> In contrast, I've had good luck with some 1-watt mesh-y
> units (i.e. Ayrston's Ayrmesh boxes -
> http://www.ayrstone.com/products.html )
> But these units always need to "contact the mother ship"
> at boot-time.  So "off the grid" doesn't work.
>
> Anybody have a good source for higher powered wifi units?
> I'd like to get away from Ayrmesh if general. They are
> pricey and I hate having to rely on their website in order
> to boot.
>
> Alternatively, it is possible that I'm botching the set-up
> of the amps/antennae that I already have.  Is there a good
> resource (website?, book?, person?) on the process and pitfalls
> of this sort of thing somewhere?
>
> Thanks in advance,
> Dan Nachbar
>
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