This circuit is essentially an amplified crystal set. The inductor could be a standard AM radio ferrite rod antenna while the tuning capacitor is a variable plastic dielectric gang, intended for small ...

The film explains the concept of electromagnetic waves, particularly focusing on their applications in radar, radio, and television. It describes how a crystal set functions as a simple radio receiver ...

At Hackaday, we like to see build logs, and over on Hackaday.io, you can find plenty of them. Sometimes, though, a builder really outdoes themselves with a lot of great detail on a project, and ...

A staple of starting off in electronics ion years past was the crystal set radio, an extremely simple AM radio receiver with little more than a tuned circuit and a point contact diode as its ...

I once read about soldiers making improvised radio receivers for themselves so that even if they were down in a foxhole, they might be able to find out something important. To make one of these, all ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Radios, like this Eveready model 2, ...

The Perseids are a favorite meteor shower of many Northern Hemisphere skywatchers, especially during the mild summer nights of August. But if you can’t get outside or if you’re clouded out, you can ...