Browse Items (62 total)

[Learadio automatic direction finder]
Photograph of a Learadio automatic direction finder, circa 1940.Inscription: "Manual loop antenna rotator and directional indicator. 1940."

[Learadio combination motor generator and transmitter]
Composite photograph of a Learadio combination motor generator and transmitter, showing views of the internal components and the external case, circa 1935-1937. The verso caption states that this was one of the first transmitting devices for private…

[Learadio equipment installed in front and rear cockpits]
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…

[Learadio equipment installed in front cockpit]
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:…

[Learadio loop antenna]
Composite photograph of a Learadio loop antenna, showing two views of the internal components, circa 1931-1939. The caption describes the antenna's development and specifications.Typed caption on verso: "H. Shows an early attempt to tune the loop…

[Learadio loop antenna]
Photograph of a Learadio loop antenna, circa 1931-1939.

[Learadio Model R-3 aircraft receiver, antenna, and peripheral components]
Photograph of a Learadio Model R-3 aircraft receiver, shielded loop antenna, and peripheral components, circa 1931-1939. The caption describes the device's development.Typed caption on verso: "P. This loop was metallized in an attempt to shield it,…

[Learadio Model R1 receiver and headphones]
Photograph of a Learadio Model R1 receiver and headphones, circa 1931-1939. The device is on scale to demonstrate its light weight. The caption describes the device's development and specifications.Typed caption on verso: "C. A Model R-1…

[Learadio Model RCB receiver tuning unit]
Photograph of a Learadio Model RCB receiver tuning unit, circa 1930s-1940s.

[Learadio panel assembly]
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 /…
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