COMM-100 FA4 Chapter Notes - Chapter 5: Federal Communications Commission, Spark-Gap Transmitter, David Sarnoff
28 Sep 2016
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Document Summary
Telegraph - precursor of radio (1840s) by samuel morse. Morse code series of dots and dashes from electrical impulses. Heinrich hertz proved johnson"s theories correct w/ the 1st recorded transmission and reception of electromagnetic waves. Guglielmo marconi attached a spark gap transmitter to a telegraph and connected them to the earth. He became a successful pioneer of radio. Tesla actually was the father of radio (contrary to people thinking it was marconi) Deforest challenged marconi, transmission interference becomes an issue. Deforest"s biggest invention - the audion (an amplifier) Fessenden became the 1st person to broadcast a voice. Ship requirements and signal interference were both very important issues. Radio act of 1912 addressed amateur radio interference. By wwi american marconi was the biggest radio company. British marconi"s alternators got stronger, so the us looked for ways to undercut them. Ge (general electric) became a private sector monopoly and formed rca (radio. Rca had total control over hundreds of companies and parents.
