Browse Items (62 total)

[Lear Developments Type T-120 transmitter]
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…

[William P. and Moya Olsen Lear Papers, Box 4, Folder 3 - Learadio AMRL-1 marine radio direction finder, Learadio compass, Learadio T30 aircraft transmitter, Learadio R3 aircraft receiver, 1937-1938]
Items from Box 4, Folder 3 of the William P. and Moya Olsen Lear Papers, circa 1937-1938. Contains an advertisement for the Learadio Compass, an advertisement for the Learadio AMRL-1 Marine Radio Direction Finder, and a brochure for Learadio…

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

[William P. and Moya Olsen Lear Papers, Box 4, Folder 6 - "Learadio Airport Localizer (L-P-2)", 1939 September - October]
Items from Box 4, Folder 6 of the William P. and Moya Olsen Lear Papers, September to October 1939. Folder contains assorted items related to the Learadio Airport Localizer (L-P-2), including summaries, correspondence, diagrams, sketches, a clipping,…

[Learadio antenna reel]
Photograph of a Learadio antenna reel, circa 1939.Inscription: "Complete manual operated ant. reel with spring take-up fair-lead and [illegible]. / 1939."

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

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

[William P. and Moya Olsen Lear Papers, Box 15, Folder 3; Box 209, Folder 2; Oversize Folder 3 - Radio apparatus chassis (Case 74-1), 1939 December - 1942 October]
Items from Box 15, Folder 3; Box 209, Folder 2; and Oversize Folder 3 of the William P. and Moya Olsen Lear Papers, December 1939 to October 1942. Contains patent applications and technical drawings created by William P. Lear for the radio apparatus…

[William P. and Moya Olsen Lear Papers, Box 17, Folder 1; Box 209, Folder 2 - "Directional radio system (Case 17-2)" -- patent application [RM files], 1940]
Items from Box 17, Folder 1 and Box 209, Folder 2 of the William P. and Moya Olsen Lear Papers, circa 1940. Contains patent applications, technical drawings, notes, and photographs related to the directional radio system. Many of the documents were…

[Lear Developments BC-190-T5 radio transmitter]
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:…
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