Among pre-teens, mostly boys took to radio.1 At its simplest, radio was affordable. Boys could buy or make parts to build simple receivers and even low power spark transmitters. Typically, a kid would hook together a crystal receiver using a metallic mineral such as galena, scraps of used wire and a set of headphones, perhaps the most expensive component. This basic receiver was not much more than a rock, some wire and a telephone receiver. But it was magic! A … Continue reading →