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Solve : Extending wireless signal?

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Where I go to church I have one building that has comcast with a wireless access point. I want to put a computer in another building about 100 feet away. The computer has wireless network CARD. Could I use a BRIDGE to extend the wireless signal to the other building?I had a similar need a few years back and ended up using a wi-fi extender that connects to a computer usb port. My need was for a laptop to be used in cases where a wi-fi location was available but distance of reception was variable and could be a 100 feet or more. For the most part i was satisfied with the result. However i ALSO used the device at home where i had the further ability to enhance the reception. I did this by purchasing an antennae to be attached to my router (which is connected to my DSL modem) for  stronger transmission capacity than that which came with the router. While this may achieve your desired result a few things additional to consider are that the ability of a wi-fi connection to be readily receivable is NOT only governed by distance. The intervening materials of construction can greatly INFLUENCE reception as well.For instance   air is better than glass which is again better than bricks. As an example if you are using your computer inside the building where the wi-fi connection is located it will be stronger than if you are outside even at a shorter distance because of construction material obstacles. Here is a parameter of search that will produce a great deal of EXAMPLES of what i am referring to "wifi antenna extender". This is the link to the one i have used. http://www.hfield.com/
Something for you to consider.truenorth

http://www.turnpoint.net/wireless/cantennahowto.html
http://www.turnpoint.net/wireless/has.html
http://www.freeantennas.com/projects/template2/
http://www.freeantennas.com/projects/template2/Windsurfer_Pic.JPG

Just trying to show some examples.
A bit of time with Google, and you'll find a LOT of these things. 
Try: "wifi parabolic"   and then "wifi antenna extender"

A friend of mine did the parabolic reflector.   Just used some thin cardboard and tinfoil.  A totally flimsy awful looking thing.... but he saw a LOT of improvement.  His shop is well over a hundred feet from his home.   

Good luck with it.

What bra d of coffee do you drink?
With Maxwell House the  can is proven to extend  WI-Fi range.
Maxwell House Wireless Antenna
Others may work, but do not taste the same.



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