In the 1920s, crystal radios were all the rage: broadcasters abounded, the equipment was cheap enough and small enough to be fit anywhere -- including the surface of a postcard. There's nothing particularly spectacular about it as far as radios go, except for the ingenuity in micro-scaling the technology at a time when today's semiconductors and microscopic electronics were a pipe-dream. Want a postcard radio of your own? Shoppes in the UK have modernized kits for sale.
No comments at this time.