Pringles can wifi experience needed.

[reddragdiva]

I have a friend who is attempting to pick up a wifi signal from rather too far away (though thankfully still line of sight). They would like to try the famous Pringles can wifi, or similar excessive-gain antenna.

Now, the theory is fine — and we've been looking through the one zillion web pages on the subject. But what I want to ask you lot is: have any of you ever actually built such a device yourselves and had it working reliably? If so, what design did you use and what did you use for the wifi device?