As the Apollo 11 mission draws to a close there is a crisis at the tracking station on Guam: the antenna that will track the spacecraft during reentry, and allow mission control to communicate with the astronauts is stuck--and ten-year-old Marty is the only one small enough to reach in and grease the ball bearings that allow the antenna to move.

Basic Radio reveals the key building blocks of radio: receivers; transmitters; antennas; propagation and their applications to telecommunications; radionavigation; and radiolocation. This book includes simple, build-it-yourself projects to turn theory into practice--helping reinforce key subject matter.