Wireless apparatus for use on aeroplanes. Includes a generator, 500 cycle, 120-volt quenched spark gap, and open core transformer. Generator was purchased from Holzar-Cabot under order #9758, while the spark gap and transformer were made in the laboratory. This photograph was taken in March 1919.

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Size: 8412px × 5712px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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