Great enjoyment was had in watching many YouTube Videos about crystal radio receivers. So thought I would make one as well... Starting with the very simplest possible sort. Of course, that wasn't too much trouble, besides being great fun. Any follow-up will be a bit more difficult though! In this video I also try to explain how they work; and though I am not an expert I hope it is mostly correct? I'm sure that people will tell me what has been got wrong!