Technological devices are becoming advanced enough to do just about anything, but the concept of radio hasn't changed much in several decades. Despite all of the innovations stations now use to broadcast and record, you still can make a simple FM radio at home. All you need are a few items and no tools. It takes only a few minutes to build one.
Instructions
Putting It Together
1. With the pencil tip, poke a small hole in one end of the cardboard tube. Thread the end of the magnet wire through the hole and tie it to the tube.
2. Wrap the magnet wire around the tube for the entire length of the tube. Be careful not to break the wire and make sure you make as many turns around the tube as you can.
3. Secure the tube to the board with a thumbtack.
4. Slip one end of the magnet wire coming off the tube underneath the razor blade, so the blade and wire touch. Secure the wire and razor blade in place on the board below the tube by hammering it with one or two thumbtacks.
5. Cut the jack off the earpiece with the wire cutters and trim back some of the insulation to expose the wire.
6. Wrap the exposed wire on the earphone jack around the large end of an open safety pin.
7. Stick the sharp end of the open safety pin into the blunt end of the pencil tip and place the graphite tip of the pencil tip on the razor blade.
8. Attach the antenna wire to the magnet wire that runs from the tube to the razor blade.
9. Attach the ground wire to the end of the magnet wire that runs from the other end of the cardboard tube.
10. Secure loose wiring with thumbtacks against the board if needed.
11. Place the radio in a position that will receive radio signals well (e.g., a window) and position the antenna and ground wires. Insert the earpiece in your ear and listen.
Tags: magnet wire, razor blade, around tube, blade Attach, cardboard tube
