On Sun, 28 Sep 2008 20:02:03 -0700, John Smith
wrote:

Here is one guys construction attempt ...
http://www.findmorecollectibles.com/wifi.html
Just a general USB (dongle type) wifi adapter could be substituted for
the specific one he uses, the hole in the can adjusted for it ...

Yech. 19.5dBi maximum gain from a 0.6 meter dish at 2.4GHz. Most
such construction efforts end up with about 12-14dBi:
http://groups.google.com/group/alt.internet.wireless/msg/95865cfd18b0f102

Pick a do-it-thyself wi-fi antenna, any antenna:
http://www.dxzone.com/catalog/Antennas/WiFi/

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558