Why were Specified Low-Power Radio Stations divided by application? The history of the license-free system that was not 'free for low power'

For those looking at the radio station licensing system for the first time, a simple question arises.If radio waves are weak ...

Why LED Lighting Causes Radio Interference: Non-Transmitter Devices, the Radio Act, and EMC

You turn on the Light Emitting Diode (LED) lighting in your room. Suddenly, you hear a buzzing or static sound from an AM ...