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marconi
was an italian inventor he sent and recived the first radio signal in 1895 was the first or was it a case of good PR -
audion tube
lee de forest created (or brrowed the idea for) the audion tube, a vacuum tube that amplified signals
it is widely believed that a canadian inventor, reginald fessenden, actually came up with the isdea but fessenden didnt seem to make it into the history books for that invention -
radio stations
8XK, later renamed KDKA was the name of the first radio station
frank conrad hosted the first radioshow
this show is still around today -
how do the stations make money?
in 1922 they decided that they would air commercials to make money for about $50 -
call letters
W is east of the mississippi river
K is west of the mississippiriver
Many countries have specific conventions for classifying call signs by transmitter characteristics and location. -
AM waves
amplitude modulation
535 KHs - 1605 KHz -
FM waves
frecuency modulation
88-108 MHz -
FRC
organized the licensing of transmitters assigning radio station frequencies call leters and power limits -
golden era
30-40 middle of the great depression the radio provided intertainment and it would help hem get their minds off the struggles they were oing through at the time -
family meduim
the entire family can enjoy it together big band music/story hour/ situational comedies/dramas -
why did they add music to the radio?
tv shows started coming out and there wasnt a lot of people that would want to just listen to people talk all the time so what savesd these radio stations is that they put music on music on the radio filled a void -
radios progrssion
major edwin armstrong invented th FM transmitter which made for a stronger signal ad higher quality sound listeners were forced to buy new radio sets
talk on AM
music on FM -
radio now
we now listen to radio in or cars on busses in elevaters and in every building we go in radio is a big part of our lifes and there are lots of different stations
