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The History Of Radio

retro radioThe radio is perhaps one of the most important technological inventions of the 1920’s. It not only bought the people together but it paved the way for people to communicate and interact. It has become an important part of our lives whether it is for listening to news reports or enjoying music. This technological invention paved the road for advanced communication, entertainment and music discovery. Since its inception in the 1890’s it has continuously evolved to fit our needs and requirements perfectly. It was in fact the first device that allowed for mass communication and enabled information to be transferred far and wide.

The Invention of Radio

The telegraph and telephone played a great role in the invention of radio. All the three technologies are closely interconnected and the radio technology began as wireless telegraphy. Back in 1860’s James Clerk Maxwell, a Scottish physicist realized the presence of radio waves. Later in the year 1886 German physicist, Heinrich Rudolf Hertz illustrated and interpreted the electromagnetic theory of light formulated by James Clerk Maxwell. He proved that electricity can be transmitted in electromagnetic waves. His experiments with electromagnetic waves led to the progress of radio. In 1886 Mahlon Loomis first successfully established and evidenced wireless telegraphy by claiming to have transmitted signals using kites as antennas. The Italian inventor, Guglielmo Marconi proved the practicability of radio communication. He sent the first radio transaction in the year 1885. In 1901 he sent a signal from Newfoundland to England which consisted only of the letter “S”in telegraphic code. This was in fact the first transatlantic broadcast of a radio wave.

The Growth of Radio Technology

In the year 1904 Sir John.A.Fleming devised the first vacuum electron tube which helped the detection of radio waves through electronic circuits and systems. Later Lee De Forest developed the audion which not only identified radio waves but also amplified it. Radio telephony began in 1906 as a result of the contribution of Reginald Fesseden and Ernst Alexanderson. Fesseden invented the modulation of radio waves which permitted the reception and transmission of radio waves on the same aerial without any disturbance. Edwin. H. Armstrong invented the regenerative circuit which made long distance radio reception feasible. He developed the frequency modulation which improved the audio signal of radio. In 1920 the KDKA at Pittsburgh was established which was the first ever commercial broadcasting corporation. This was a huge success and people listened to everything they broadcasted. More than twenty radio stations popped up in the 20’s. Following this, numerous technical advancements were implemented in this industry. In the year 1965 the first FM antenna system was set up in the Empire State Building in NYC.

The technical improvements changed the radio programming drastically. Radios that combine both the transmitters and the receivers are used for the purpose of communication. Today there are 33,000 radio stations across the globe. This invention was truly the first means of mass communication which allowed people to impart valuable information with ease. Yes, in fact radio provided the cheap and convenient means of conveying information and ideas. Hats off to this wonderful invention.

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