building both a transmitter and receiver. At the most basic level, AM radio works by generating a carrier wave with an oscillator, and then modulating the amplitude with an audio signal.

Researchers have found a low-power, inexpensive way for large numbers of devices, such as machines in factories and equipment ...

Flames from the Eaton fire came perilously close to the Mt. Wilson transmitters, and local stations, including KABC, PBS ...