How do crystal radios work? What’s the most rudimentary way a human could build one from scratch?
In: Technology
They work by using the radio waves themselves as the power source. The crystal is used as a diode to rectify it. A tunable coil/capacitor let you pick what radio station you’re listening to. Output power is very low, because there’s no amplification.
The simplest version is probably a foxhole radio. Though if you intend to use it regularly, you may want something a bit more complex.
Latest Answers