I hope I am not hijacking this site. I live in Mexico, and have very limited access to technology hardware and knowledge.

Here is what I am desperately trying to achieve : transmitting live classrooms in small remote villages out of town, miles away.

Technically, I need to send - cheaply - a live analog video from an analog camera (image and stereo sound) inside a secondary school classroom in the middle of a city through directional antennas like the ones you are using (2.4 or 5.8 ghz) toward a classroom in a small village, where a TV set would receive the analog signal.

BUT I fail to understand what hardware I need. I wonder if antennas need to be line-of-sight or not. The school roof in the city is obviously not the highest of the town.

Mexican laws tend to be the same as US laws, so point-to-point transmission is relatively permitted under reasonable limits. I can use 500mw of output transmitting power with a transmitting antenna up to 14 DBI.

My feeling is that seeing your amazing achievement, you are the ones who can help !

In short, if you guys could list the most adapted, reliable, and cheapest hardware to do so would be of a tremendous help, so that I could directly order it shopping through Internet. Installation I guess is fairly easy.

I am used to send analog video signals from a camera attached to a kite, toward a TV on the ground. I suppose that technology is the same. I am using a tiny 500mw TX and a 8 DBI antenna. I am using 2.4 ghz.

I am sure you realise the potential of such a system in under-developped countries, where kids cannot go to school because they hae to stay at the village to help the family.

Many thanks in advance.

Phil