Watson-Watts Radar Radio Direction Inventor Vintage Trade Card

Description

Watson-Watts Radar Radio Direction Inventor Vintage Trade Card
NOTE:
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AND
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THE CARD DIMENSIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
THIS IS AN ORIGINAL VINTAGE TRADE  ADVERTISING CARD
WATSON-WATTS RADAR
Sir Robert Alexander Watson-Watt was a Scottish pioneer of radio direction finding and radar technology.
Watt began his career in radio physics with a job at the Met Office, where he began looking for ways to
accurately track thunderstorms using the radio signals given off by lightning. This led to the 1920s
development of a system later known as huff-duff. Although well publicized at the time, the system's
enormous military potential was not developed until the late 1930s. Huff-duff allowed operators to determine
the location of an enemy radio in seconds and it became a major part of the network of systems that helped
defeat the U-boat threat. It is estimated that huff-duff was used in about a quarter of all attacks on U-boats.
In 1935 Watt was asked to comment on reports of a German death ray based on radio. Watt and his
assistant Arnold Frederic Wilkins quickly determined it was not possible, but Wilkins suggested using radio
signals to locate aircraft at long distances. This led to a February 1935 demonstration where signals from a
BBC short-wave transmitter were bounced off a Handley Page Heyford aircraft. Watt led the development
of a practical version of this device, which entered service in 1938 under the code name Chain Home. This
system provided the vital advance information that helped the Royal Air Force win the Battle of Britain.
NOTE:
THE REVERSE SIDE HAS TEXT ABOUT THE IMAGE ON THE FRONT SIDE
THE CARD DIMENSIONS ARE APPROXIMATELY
2 5/8 '' x 1 3/8 ''  or  6.5 cm. x 3.5 cm.
NOTE:
THE IMAGE ABOVE IS LARGER THAN THE CARD
TO SHOW THE DETAIL.
SEE SCALED IMAGE ABOVE.
THIS CARDS IS NOT A MODERN REPRODUCTION
IT IS AN ORIGINAL VINTAGE CARD
IT IS NOT PERFECT AND THIS CARD MAY HAVE ONE OR MORE OF THESE:
SLIGHT PAPER LOSS
SMUDGING
ROUNDED CORNERS
SURFACE CREASE
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37
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