Browse Items (63 total)

Brochure for the Learadio Model UT-6 radio transmitter, circa 1939.

Brochure for the Learadio Model T30-R3AB aircraft transmitter-receiver, circa 1939.

Pamphlet about Learadio aircraft radio equipment, circa 1930s. Contains technical specifications and images of various models of transmitters, receivers, power supplies, and accessories. 41 pages.

Advertisement poster for Learadio aircraft equipment, circa 1931-1939.

Learadio in rectangular brown wood case. Display at top with frequency range 55 - 160 in red, yellow and green, with "Learadio." 3 white plastic knobs at bottom. At center is a mesh golden brown fabric-covered speaker.

Photograph of William P. Lear holding the Lear Radio-Aire, Chicago, Illinois, circa 1932. Inscription: "The first Radio Aire / Bill / 1932."Inscription on verso: "Bill Lear + his first airplane radio, the Lear Radio-Aire. Chicago, 1932. Photo…

Photograph of a Learadio airport telephone transmitter, circa 1931-1939. Inscription: "This 15-watt power transmitter was habitually able to work aircraft 250 miles away. Freq. 278 kc."

Photograph of a Learadio R3AB receiver, circa 1937-1939. Inscription: "Ground station designed for foreign use 1937-193[cut off]."

Photograph of a Learadio T-40 transmitter, circa 1935-1939. Inscription: "T40 6 freq. transmitter designed for D.O.C. (FAA). 1935."

Photograph of a Lear Developments aircraft transmitter, circa 1931-1939. The verso caption notes that this transmitter was developed for the Flight International Corporation and describes the device's components and specifications.Typed caption on…