Lithographic map of Roosevelt Field, Long Island, New York, circa 1931-1939. Several locations are noted on the map, including Learadio Laboratories (location "J").
Photograph of Learadio equipment installed in the front cockpit of an unidentified aircraft, circa 1940s-1950s. Several of the components are labeled.Caption: "NA-44 / Learadio equipment / Front cockpit -- Right side. 20-1171-28."Labeled components:…
Photograph of an unidentified aircraft fuselage with its side panel removed, showing the Learadio equipment installed in the front and rear cockpits, circa 1940s-1950s. Several of the components are labeled.
Caption: "NA-44 / Learadio equipment…
Composite photograph of Learadio panel assembly, showing side and front views, circa 1940s-1950s. Individual components include a fixed antenna tuning unit, trasmitter, automatic direction finder, and control unit.Caption: "Front view / NA-44 /…
Photograph of an instrument panel outfitted with Learadio equipment, circa 1940s-1960s. Several of the instruments are labeled.Caption: "NA-44. Learadio equipment installation. Rear cockpit. Direction indicator. Transmitter power supply - Type…
Photograph of a Learadio portable receiver, circa 1930s-1940s.Inscription: "Portable 2-band battery-operated receiver used thru-out WW2 by many USAF [personnel?] here and all over world."