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N0KFQ > TODAY 27.01.15 17:00l 53 Lines 2359 Bytes #999 (0) @ WW
BID : 45746_N0KFQ
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Subj: Today in History - Jan 27
Path: IZ3LSV<I0OJJ<N6RME<N0KFQ
Sent: 150127/1500Z 45746@N0KFQ.#SWMO.MO.USA.NA BPQ1.4.62
Jan 27, 1926:
Baird demonstrates TV
On January 27, 1926, John Logie Baird, a Scottish inventor, gives
the first public demonstration of a true television system in
London, launching a revolution in communication and
entertainment. Baird's invention, a pictorial-transmission
machine he called a "televisor," used mechanical rotating disks
to scan moving images into electronic impulses. This information
was then transmitted by cable to a screen where it showed up as a
low-resolution pattern of light and dark. Baird's first
television program showed the heads of two ventriloquist dummies,
which he operated in front of the camera apparatus out of view of
the audience.
Baird based his television on the work of Paul Nipkow, a German
scientist who patented his ideas for a complete television system
in 1884. Nipkow likewise used a rotating disk with holes in it to
scan images, but he never achieved more than the crudest of
shadowy pictures. Various inventors worked to develop this idea,
and Baird was the first to achieve easily discernible images. In
1928, Baird made the first overseas broadcast from London to New
York over phone lines and in the same year demonstrated the first
color television.
The first home television receiver was demonstrated in
Schenectady, New York, in January 1928, and by May a station
began occasional broadcasts to the handful of homes in the area
that were given the General Electric-built machines. In 1932, the
Radio Corporation of America demonstrated an all-electronic
television using a cathode-ray tube in the receiver and the
"iconoscope" camera tube developed by Russian-born physicist
Vladimir Zworykin. These two inventions greatly improved picture
quality.
The British Broadcasting Corporation (BBC) inaugurated regular
high-definition public broadcasts in London in 1936. In
delivering the broadcasts, Baird's television system was in
competition with one promoted by Marconi Electric and Musical
Industries. Marconi's television, which produced a 405-line
picture--compared with Baird's 240 lines--was clearly better, and
in early 1937 the BBC adopted the Marconi system exclusively.
Regular television broadcasts began in the United States in 1939,
and permanent color broadcasts began in 1954.
73, K.O. n0kfq
N0KFQ @ N0KFQ.#SWMO.MO.USA.NA
E-mail: kohiggs@gmail.com
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