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Frequency Modulation (FM Waves)
The modulation of a radio or other wave by variation of its frequency and to carry and audio signal -
First radio broadcast
Guglielmo Marconi, an Italian inventor, broadcast the first radio signal, which traveled about a mile. This signal was tapping, which is known today as Morse Code (invented after this event). Marconi was not getting support by the Italian government to further his research in radio so he moved to England. -
Amplitude Modulation (AM Waves)
the modulation of a wave by varying its amplitude used chiefly for radio broadcasting -
Audion tube
The Audion tube was an amplifying machine invented by an electrical engineer Lee De Forest in 1906. It was the first triode and consisted of many parts -
AM Radio
during radio's popular time, AM radio was more for talk radio because of the sound quality and it helped people identify the stations. -
Dawn of Advertising
Companies wanted to advertise themselves on the Radio and the station would charge them for however long the commercial was. -
Uncle Charlies
Uncle charlie was a name used for people who tried to create their own independent radio stations from their home. -
FM Radio
When Radio started to get more recognized, FM radio was more for music played because of the sound waves produced that gave it better quality. -
Station KDKA
KDKA was the first commercial broadcasting station on the 20's. It is a radio station that still runs today in Pittsburg, Pennsylvania. -
Call Letters
Stations that were east of the Mississippi river had "W" at the beginning of their station name , and stations west of the river had "K" -
Federal Radio Commission (FRC)
The FRC was created to control all the Uncle Charlie's broadcasting their own stations from their home. -
Radio's Demise
TV makes an appearance in the late 30's and radio popularity goes down. People enjoyed TV more and Radio actors would've appeared differently on TV then they sound. -
Golden Era
The Golden Era was a time period where families enjoyed their radio system in their homes and it brought people together to have a good time, and used a family medium -
Shows to Music
Radio shows had to make a comeback since TV had taken its spotlight so in order to do so they played music on the radio for the first time. People listened to to the radio in their car and at jukeboxes and other places. -
Modern day radio
Radio has changed a lot since the early 1900's. We have things like Spotify and Pandora where u can choose what you want to listen to for free with the choice of no ads.
