Browse Items (63 total)

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…

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…

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

Photograph of a Learadio portable transceiver and travel case, circa 1931-1939.Inscription: "Portable transceiver for [illegible] use."

Photograph of a man using a Learadio portable marker transmitter in an open field, circa 1931-1939.Inscription: "First completely portable outer or inner marker transmitter for radio compass [illegible]."

Lithographic map of Roosevelt Field, Long Island, New York, circa 1931-1939. Several locations are noted on the map, including Learadio Laboratories (location "J").

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

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 people working in the Lear Developments workshop, New York City, New York, circa 1933-1938. Electronic components, device casings, and a loop antenna are visible on the workbenches.Inscription on verso: "The Lear (1) Engineering Dept,…

Photograph of two men using machine tools in the Lear Developments workshop, New York City, New York, circa 1933-1938.