Browse Items (60 total)

Photograph of a Lear Developments BC-190-T5 radio transmitter, circa 1940. The verso inscription notes that this transmitter was developed for the U.S. Army Signal Corps and describes the device's components and specifications.Inscription on verso:…

Photograph of a Lear Developments loop antenna with a transparent plastic shield, circa 1935-1939.Inscription on verso: "Loop antenna. Winner of national plastics award in 1935. First stream lined housing for loop antennae."Stamped on verso: "Please…

Composite photograph of a Lear Developments radio receiver, showing views of the internal components and the external case, circa 1931-1939. The caption notes that this device was developed for the U.S. Department of Commerce.Typed caption on verso:…

Photograph of a Lear Developments special aircraft receiver and remote control unit (radio transmitter Type L-35S-1), circa 1931-1939. The verso caption notes that the receiver was developed for the Ontario Forestry Branch and describes the device's…

Composite photograph of a Lear Developments telephone transmitter, showing views of the internal components and the external case, circa 1931-1939. The verso inscription, which was written by William P. Lear, states that this was the first 3105-3120…

Photograph of a Lear Developments Type T-120 transmitter, circa 1936-1939. The caption on verso notes that transmitter was developed for the Royal Canadian Air Force and describes the device's components and specifications. Caption on verso: "J. This…

Photograph of a Lear device, circa 1931-1939.

Photograph of a Lear device, circa 1931-1939.

Photograph of a Lear radio compass, circa 1931-1939.

Photograph of a Learadio aircraft communications system, circa 1931-1939. Specific devices pictured include the Model MOPA transmitter (emitator acord unit) and Model R2BB receiver (receptive accord unit).Caption: "Typical aircraft communication…