-
marconi sent and recieved the first radio signal.
-
lee de forest created the audion tube that amplified signals.
-
KDKA was invented by frank conrad. its still around today in pennsylvania.
-
in 1922 weaf aired a 10 minute commercial. they got 50$.
-
they prganized lisencing of transmitters and assighned radio frequences and power limits.
-
radio provided family medium shows. also had a little music
-
edwin armstrong invented the fm transmitter. listeners where forced to buy better radio sets.
-
advertisers go to tv and radio shows jumped the boat.
A list shows items. A timeline shows sequence.
Use Timetoast to make dates, milestones, and turning points easier to understand in a clear visual format. Timetoast is a timeline maker for work, school, research, and stories.