JAWUG

First, you must have contacted someone and arranged to connect to them. Use WugNet to find someone near you.

You'll need a Wireless Access Point thats capable of operating in Client mode. The LinkSys can do this.

Encrypted :: If your having trouble getting an AP, or your supplier is out of stock you can also use a regular windows (not recommended) or linux (recommended) PC. Contact me if your having trouble getting the card running under linux. Most AP's are just little PC's (normally not x86) running a miniture linux distribution. AP's are recommended due to the ease of placement and management, however, feel free to build your own AP or use a regular PC.

Then you'll need a pigtail that converts the little connector on the back of the Access Point to an N-Type connector.

You'll need enough LMR-400 to go between the Access Point and the Antenna that you're planning on using.

Encrypted :: Placement, placement, placement. You want as little of this ugly black cord as possible. If you can get your PC/AP into an outdoor enclosure and stick it next to your antenna then do so.

Be sure to read SomeInstallationTips before you start putting everything together.

Once you've got everything connected up, you'll need to aim your antenna and make sure that you've got a working connection. Most Access Points have a section in their configuration where you'll be able to see your Signal Strength, the better your Signal, the better your chances are of getting a nice fast connection.

Encrypted :: Also try do some IP tests, run ping for a while with a large packet size (1000bytes) to test loss/times, tune the antenna to get the best results. You can also do TCP throughput tests, easiest way would be to just run an ftp server one side and use a decent ftp client on the other side. Also, once your antenna is aimed perfectly make sure its secured well, you dont want to loose signal the next time a strong wind blows.

You can assign some testing IP addresses to everything, and once its all running send admin»jawug a request for some IP addresses. Please include the number of PCs at your location and you upstream Node Name.
We'll assign you an appropriately sized subnet, and setup the routing on our Backbone so you'll be able to contact everyone else.

Daffy :: I built a box recently, and took some pictures as I went.
First, I drilled 3 holes.
(1 for Power, 1 for Cat5 and 1 for the LMR400 that goes to the Antenna)
The location of the holes isn't an exact art, but this layout seems to be the best. In this picture, the hole on the extreme right is for the LMR400 cable.

And fitted 3 glands
(The reason there's no blue rubber bit in the right gland, is because its already on the LMR400 cable. It was a tight squeeze, but it fits snuggly, and watertight too!

Then I put everything inside. The Linksys WRT54G fits perfectly. There's a TNC to NType Jack on the Antenna port of the WRT54G (which you can see in the background of the first 2 pictures), and then the LMR400 plugs into that. The power cable has a standard extension cord head on it, with a 2-prong adapter for the WRT54G's power supply.
I dont recommend doing the power this way! I'm just running it for a while to see what happens, but I intend on taking the power supply out of the box and running 12v straight into the WRT54G.

The glands that I used fitted the LMR400 cable perfectly, and I coated the whole gland in Silicon glue to keep it water proof.