Browse Items (19 total)

[Various components for Learadio T30R3 installation]
Photograph of various components for a Learadio T30R3 installation, circa 1931-1939. The verso caption describes the problems and capabilities of the trailing antenna.Typed caption on verso: "G. Shows a complete set of equipment for a T30R3…

[Motorola car radio designed by William P. Lear]
Photograph of a Motorola car radio designed by William P. Lear, circa 1931-1939.Inscription on verso: "Car radio."Inscription on duplicate photo: "1st car radio. This radio was built and designed by Bill Lear."

[Loop antenna]
Photograph of a loop antenna, circa 1931-1939.

[Learadio Type TR-50 transmitter]
Photograph of a Learadio Type TR-50 transmitter, showing views of the internal components and the external case, circa 1931-1939.Typed caption on verso: "T. Shows the original effort to make a more powerful transmitter by using tubed in parallel.…

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

[Learadio radio and navigation equipment]
Photograph of Learadio radio and navigation equipment, consisting of a transmitter, receiver, and direction finder, circa 1936-1939. The verso caption notes that this equipment was developed by "myself" (William P. Lear) and Reeder Nichols for the…

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

[Learadio combination motor generator and transmitter]
Composite photograph of a Learadio combination motor generator and transmitter, showing views of the internal components and the external case, circa 1935-1937. The verso caption states that this was one of the first transmitting devices for private…

[Learadio airport telephone transmitter]
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."

[Learadio aircraft communications system]
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…
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