How to Make/Build a Crystal Radio

How to Make/Build a Crystal Radio Video Clips. Duration : 11.75 Mins.

Step-by-step instructions for making a tunable crystal radio. This is a radio that gets its power from the radio waves. I made it almost entirely from junk except for the diode (1N34 germanium diode) and the earpiece (though you can use a speaker from a phone instead.) The capacitor is made from aluminum foil and a paper towel roll. The coil is rolled on a toilet paper roll. The wire is enameled magnet wire. For the antenna I use a 15 foot wire laid out on the floor. For the earth ground I connect a wire to the ground in the household wiring. I originally got this circuit from the book "Radio Receiver Projects You Can Build" by Homer L. Davidson. The crystal earpiece (piezoelectric earphone) and/or 1N34 germanium diode can be orders from these sources: www.scitoyscatalog.com www.maplin.co.uk You can find the circuit diagram shown in this video on this page: rimstar.org See also: How a Crystal Radio Works video: youtu.be Crystal Radio Troubleshooting and Tips video: youtu.be Make Crystal Earphone/Earpiece for Crystal Radio video: youtu.be Use Earbuds/Earphones with Crystal Radio video: youtu.be Make a Crystal Radio Coil with Taps video: youtu.be Follow me on Twitter: twitter.com - rimstar.org