You probably hear a radio every day without thinking much about it. Radio is just one of the things you have grown up with. When radio first began, however, everyone thought it was wonderful that music and words could be sent all over the world without wires.
You can find out for yourself the excitement of the early days of radio and learn how a radio works by building one for yourself.
(Bear handbook page 190)
3a – Build a crystal or diode radio. Check with your local craft or hobby shop or the nearest Scout shop that carries a crystal radio kit. It is all right to use a kit.
3b – Make and operate a battery-powered radio, following the directions with the kit.
