File:Bell telephone magazine (1922) (14756142402).jpg

Identifier: bellvol24telephonemag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: BayNet

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successful 40-centimeter model.The availability of peak pulse powerof at least 100 kilowatts was indi-cated by these tests. If the introduction of higher powerinto the Mark 3 and Mark 4 radarswas to be accomplished with minimumdelay, the power had to be limitedto 50 kilowatts—25 times that avail-able from the recently developed vac-uum tube generators. Fifty kilowattswere adequate to insure that theseequipments would have ranges wellin excess of the firing range of the 1945-46 Radar ayid Bell Laboratories ^ZZ guns they were to control. So amagnetron for this power output wasdeveloped and designed at Bell Lab-oratories and put into quantity pro-duction by Western Electric in timeto meet the first deliveries of theMark 3 in October 1941. Develop- The Whippany tests on the BritishE—12 were made about a month be-fore the Radiation Laboratory beganits operation. The formation of aneffective research team in electronicsby the Radiation Laboratory and theequipping of the necessary highly
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Three ot the many magnetrons developed by the Laboratories from the basic British design ment, design, and manufacture withina year after the historic tests on theBritish lo-centimeter E-12! The extension of knowledge aboutresonant-cavity magnetrons was per-haps the most urgent item in the rapidbuild-up in this country of a centi-meter-wave radar research program. functional electronics laboratory, evenunder the urgency of the prepared-ness program, would require manymonths. Bell Laboratories carried the loadof centimeter magnetron research, de-velopment, and construction of mod-els for radar systems researches, as 234 Bell Telephone Magazine WINTER well as a major portion of that ofother essential electronic devices,during the build-up interval of theelectronics program at RadiationLaboratory. After the RadiationLaboratorys electronics program wasunder way, and throughout the warperiod. Bell Laboratories shared theresearch and development programsof the magnetron and other centi-mete

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