Sierra Leonean Kelvin Doe built his own radio station by the age of 15 where he plays music and broadcasts news under the name ‘DJ Focus.’ He built working batteries, an FM transmitter, a sound amplifier, a three-channel mixer, and microphone receiver from scraps. – WTF Fun Facts
Source: https://weetracker.com/2018/12/24/kelvin-doe-sierra-leone-boy/