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of U.S. ARMY RADAR EQUIPMENT PART 1 Early Research and Development - 1918 - 1937 by H. M. DAVIS,
CONFIDENTIAL
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national defense of the United states within the meaning of the Espionage Act, 50 17. S. C. , 31 and 32. as amended. The transmission or the revelation of its contents in any manner to an unauthorized person is prohibited by law. 
Copy No. 27of35copies made xiv plus 69pages and 31 illustrations Historical Section Field office Special Activities Branch Office Service Division Office of the Chief Signal officer Army Service Forces |
Figure 26
1937 SEARCHLIGHT AND SOUND LOCATOR SECTION
The standard equipment of a searchlight and sound locator section in 1937- A Coast Artillery detachment with equipment of this type was ordered to the Signal Corps laboratories in the spring of 1937 to assist in the radio detection demonstration. The laboratories saved time and money by taking off the listening horns and using the sound locator chassis as a directional radio antenna mount.
Signal Corps photo 37 -6 25
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