Of course, an AM radio works differently than an FM radio ... The crystal radio you built as a kid is very similar in design to the earliest radio receivers. A tuned circuit picks the frequency ...

[gpsKlaus] built this little FM radio (translated ... t want to let an integrated circuit do all the heavy lifting try this post for a guide on building your own radio tuner.

Tesla’s Spirit Radio uses a simple crystal radio circuit connected to a computer sound-in jack to generate spooky sounds from all kinds of electromagnetic sources. As you will see, it creeped ...

This fun little DIY device is labeled as a “crystal radio circuit in a jam-jar.” But that description doesn’t even to begin to do it justice. According to Tesla, this electronic wonder ...