-
the first hertz
Heinrich Hertz detects and produces radio waves -
the first radio
the first radio was invented in 1895 by Guglielmo Marconi -
antenna
marconi invents first directional radio antenna -
radio receiver
Edwin armstrong patenets radio receiver circuit -
first music on radio
the first time music was played in 1920 by an unlicensed professor -
fm radio
fm radio is born but only in mono -
reduction of radio
television is Brin and there is a major reduction of radio listeners -
small studio
first small studio is built -
radio receiver double
The number of radio receivers in the world exceeds the number of newspapers printed daily -
approves fm
FCC approves FM stereo broadcasting, which spurs FM development. -
fm plans
FM plans are finalized for WCBN -
digital fm
In Paris an experimental digital FM transmitter begins operation.
