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The pre history and early history of radio is the history of technology that
produced instruments that use radio waves. Later in the timeline of radio, the
history is dominated by programming and contents, which is closer to general
history. Various scientists proposed that electricity and magnetism, while both
capable of causing attraction and repulsion of objects, were linked.
In 1802 Gian Domenico Romagnosi suggested the relationship between
electric current and magnetism, but his reports went unnoticed.
In 1820 Hans Christian Ørsted performed a widely known experiment on
man made electric current and magnetism. He demonstrated that a wire
carrying a current could deflect a magnetized compass needle.
Ørsted's experiments discovered the relationship between electricity and
magnetism in a very simple experiment.
In 1946, William Peck Banning wrote that historians of the future may
conclude that if there was any father of broadcasting, perhaps it was the
telephone itself. After the invention of the telegraph, numerous inventors
worked to transmit audio along wires, initially with limited success.
The first to finally achieve quality sound reproduction was Alexander Graham
Bell Bell's Articulating Telephone from the 1876 edition of the annual Journal
of the Society of Telegraph Engineers introduced the invention to British readers.
This review noted that one cannot but be struck at the extreme simplicity of
Bell's invention, and eventually home telephones became easy enough to use
so that a four year old could operate one, as reported in Children Cry For It
from the March, 1908 Telephony.
The first attempts at radio broadcasting in Czechoslovakia began after the
First World War. The first radio programme, made up of words and music,
was broadcast on the first anniversary of the establishment of independent
Czechoslovakia on October 28th, 1919, from the telegraph station at Prague's
Petrin lookout tower.
Regular radio broadcasts began on May 18th 1923, from a military tent in
Prague Kbely, making Czechoslovakia the second European country after the
UK to have regular radio broadcasting. The long-wave broadcasts at first
lasted just one hour per day and consisted of a brief lead-in and a concert.
