A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio. It uses only the power of the received radio signal to produce sound, needing no external power.
It is named for its most important component, a crystal detector, originally made from a piece of crystalline mineral such as galena.This component is now called a diode.
Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of wire, a capacitor, a crystal detector, and earphones (because a crystal set has insufficient power for a loudspeaker).
I’m thrilled to unveil my new 3D printed AM radio! I was inspired by the diy crystal and foxhole radios of the early 1900’s, but I created my own design to be as simple as possible.
- 1 Piezo Earphone
- 1 Coil of 24 AWG Magnet Wire (aka Enamel Wire)
- 1 1N34A germanium diode
- 1 aluminum foil
- 1 paper clip
- 1 package of Hildie & Jo 45 Cord Ends (5x10mm Springs)
These should be easy to find online. The springs I got are sold at Joann Fabrics. Search Silver Cord End Springs but any similar 5mm diameter springs should work.