AM stands for "Amplitude modulation". The frequency is 535 KHz to 1605 KHz. AM means that the modulation, or height of waves change. AM frequency is more for talking than for music stations. We continue to use AM Waves today such as 1080 KRLD.
He was the first person to build and send radio transmissions. He also found a way to expand the distance radio waves can go. He developed a radio that could send radio waves further than ever before.Finally, in 1901 he is able to send the first trans atlantic radio transmission.
The audion tube was created in 1906 by Lee De Forest the audion tube. The tube was developed based on the idea of vacuums tubes and how it amplifies signals. The audion was used to amplify sound and improve the quality and reliability of transmitters.
Radio Station came around in the 1920's. The original radio station was created by westinghouse on Nov.2 1920. This was the first commercially licensed radio station in america. The radio station broadcasted without advertisements.
Uncle Charle Stations
These were people own radio stations. At the time there was no FCC and anyone with broadcasting equipment could use any signal to broadcast a transmission. Uncle Charlie's popped up all over the country soon after the first radio stations were being implemented.
Advertising in radio
The first advertising was started in 1922 on WEAF radio for 10 minutes. The broadcast talked about an apartment complex. The radio station charged $50 for this broadcast.
The FRC was created in response to the high amounts of Uncle Charlie stations. The FRC was established in 1927. The point of the FRC was to organzine licensing of radio transmitters, and assign radio station frequencies, call letters, and power limits.
The call letters were installed to identify stations in the whole country. The W means east of the Mississippi River and K is west of the Mississippi River. That is why now you see radio station here labeled "WFAA".
Amos and Andy
This was a radio show in the late 1920's. It was set in Harlem, portraying to black people in the historic area of manhattan. and played by two white actors. The show was popular and even got a television how later on. The show started in 1928 and ended in the 1960.
FM stands for "Frequency Modulation". This means that the frequency of the wave is changes when you hear FM radio. The waves it operates on is 88-108 MHz. This waves is used for music more than sound. Like 106.1 KISS FM.
Golden Era of Radio
This era was from the 1930-40. It was in the great depression and people wanted to hear about the news for jobs and money. The reason it was so wildly successful during this time was because, it provided an escape from the cruel realities of the world at the time.
Radio was a huge event in America. The radio was consider a family medium, where the entire family can enjoy it together. Often there were "programs", story times, comedies, and dramas.
The radio show was a detective series show. It first aired in 1934 and ended in 1948. The show was bounced around, being picked up by CBS at first, then Mutual Broadcasting network at different times until landing a prime time sport with the network for the remainder of its show in 30 minute time slots. The show was popular however the show was not picked up as a television show after its radio ending like the others.
The television starts to make appearances in the late 1930's, as popularity grew with television the advertisements and money left radio to the television realm. As radio lost money, lots of the radio show jumped ship in order to stay alive and moved quickly to television. Soon television simply over powered radio like cars did to horses.
It was a western based radio show that started in 1952. It was ran by CBS radio and was so popular it became a TV series later on. The show had 432 radio episode and was consider a popular success. The show ended in 1961 to make way for the TV series.