narcbug

I am trying to make a rc aircraft ,for this i need a long range transmitter about 1.5km range. I have send command in digital form,so that it can be interfaced with microcontroller .

i think this site will be helpfull for you
www.howstuffworks.com

Try to find this ebook or the (real) book:

Pirate Radio and Video by Newton Braga

It has very good explanations and projects

look this site

http://www.narcbug.com/circuits1.htm