Television
This
section gives an overview of the technologies and equipment that have
given us Television as we know it today. For more than 40 years, many
of the most important national events, in a number of countries, have
been experienced as TV events. Examples include the coronation of Queen
Elizabeth II in 1953, and the death of Diana Princess of Wales in 1997.
TV is probably the most important form of mass communication of the late
20th century.
A television
picture is composed of horizontal lines; the more lines, the clearer the
picture. All sets used in Britain until 1964 comprised 405 lines. In 1964
the system was upgraded to 625 lines, where it remains today. Regular
TV broadcasting began in 1936 in Britain, but the development of TV relied
on the coming together of a number of developments in related fields,
such as telegraphy and electronics, over the previous 60 years. This convergence
of innovations happened only when organisations such as the Radio Corporation
of America (RCA), Electrical and Musical Industries, Ltd. (EMI), and the
British Broadcasting Corporation (BBC)—institutions with sufficient
capital to fund research and development—realised that TV might
be the basis of prestige, power, and profit.
Of
the six sets on display, the replica of the John
Logie Baird Televisor (1930) is the "odd man out".
This was the first ever domestic television set and used a mechanically
spinning Nipkow disc instead of a cathode ray tube. The disc was noisy
and the picture, composed of 30 vertical lines, was small and of very
poor quality. The set was built from a kit design available at the time.
When
television broadcasts resumed after World War II, manufacturers started
to experiment with tinted screens, in the hope of improving the definition
and increasing the contrast to the black and white pictures. The model
to the left has a 9" purple screen, and is a Pye
BV20C (1949).
The
next set is a Bush 9" (1950).
It was the most popular set of the early 50's, and one of the last Bakelite
sets to be produced. The 'double-D' shaped screen helped to increase the
picture size. It cost £43.9.9d, including £7.19.9d purchase
tax and sold in enormous numbers prior to the Coronation of Queen Elizabeth
ll in 1953. The Coronation was the first occasion a television audience
exceeded that of radio, with an estimated twenty million Britons viewing
the proceedings from three million sets.
Mary
J. MacDonald, 6 Oct 2005
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