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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.
Brochure for the Learadio Model T30-R3AB aircraft transmitter-receiver, circa 1939.
Brochure for the Learadio Model UT-6 radio transmitter, circa 1939.