10.3cm long, 3.5cm diameter; U.S. Army Signal Corps; 1922; triode; 4 pins. 1922 Triode produced for the US Army Signal Corps in early 1922 for experimental communications across long ranges (150 miles).
Created by
Smithsonian National Air and Space Museum
Date Created
02/14/2022
Source
Smithsonian National Air and Space Museum
Keywords
Aviation
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