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Marconi
Was an itialian inventor who was credited with receiving the first radio signal, which was in esscence the day radio broadcast was invented. -
The Audion tube
In 1906 Lee De Forest created the audion tube which amplified the radio signals and allowed for a longer distance transmissions. Although he did no tcome up with the idea he is credited with the patend. -
Radio and the Titanic
Marconi's concept was sold to the marine industry because thanks to the radio now there could be communication with land. They where able to transmit a distress signal to others. -
The first radio station
One of the first radio stations broadcasted publicly is KDKA, it was started by Frank conrad and still broadcasts today from pensylvania. -
The FRC
Everyone wanted their own radio station and eventuallly there where way too many stations so the FRC was formed in order to better organize all of these stations.It asigned frequencies call letters, power limits, etc. It is now known as the FCC -
call letters
W is east of the mississippi river
K is west of mississippi river
They where made to facilitate the locatin of frequency broadcasts. -
AM Waves
Amplitude Modulation 535KHz-1605KHz
Thia was considered a secondary frequency. -
FM Waves
Frequency Modulation
88-108 MHz
Thia wasthe typical frequency for most public broadcast radio stations.
