Back before cell phones … before video games … before television … even before electric radios, there were crystal radio receivers. In the early 1920s and 1930s, magazines offered instructions on how ...

No nameplate or maker's marking. A fixed inductance coil with sliding control and crystal detector. Inductance of the tuning coil is varied by a slider. Binding posts on wooden base. A .0003 mfd.

Marked: "Martian / Big Four / Newark, New Jersey / Pat. Pend.". A crystal radio detector with binding posts for headphone connections on top, posts for antenna and ground connections on bottom.

Before you streamed everything, there was this: The National Capital Radio & Television Museum spotlights how airwaves have changed our lifestyles, from a 1921 DIY crystal radio kit made out of a ...

Gecophone crystal detector radio set no. 1, complete with instruction handbook, made by the General Electric Company Limited, British, 1923. Polished mahogany case with a lift up lid and ebonite ...

Of all the horrors visited upon a warrior, being captured by the enemy might count as the worst. With death in combat, the suffering is over, but with internment in a POW camp, untold agonies may ...

Did you know you can build your very own working 3D-printed radio — without any soldering, electronics experience, electric cord, or even batteries? That’s exactly what talented Houston, Texas-based ...

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