If you are interested in ham radio, here is a good place to start:
http://www.arrl.org/what-is-ham-radio
Ham radio offers CB and GMRS type communication (VHF and UHF) as well as long wave “HF” that allows you to talk around the country and around the world. Power limits for HF go as high as 1500 watts, though I have talked to all 50 states and 71 countries using 100 watts and a wire antenna.
More info on the setup in my camper:
Joel
