Identifier2000-06-20_image_051SourceThe William P. and Moya Olsen Lear Papers (2000-06-20), Box 3, Folder 9DescriptionPhotograph 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 battery-operated receiver, which had very good sensitivity. As you can see, it weighs a little less than 16 1/2 lbs, complete with batteries and headphones. It is probably the first time a radio beacon receiver operating directly off dry cells was ever manufactured and sold to private flyers. Covered range of 200-440 KC."Creation Datecirca 1931-1939SubjectLear DevelopmentsLearadioRadio in aeronauticsAids to air navigationExtent1 photograph : black and white ; 8 x 10 inOriginal Formatphotographic printsBibliographic CitationThe William P. and Moya Olsen Lear Papers/The Museum of FlightRightsCopyright undetermined
[Learadio Model R1 receiver and headphones], [2000-06-20_image_051]. Museum of Flight Digital Collections, accessed 14/01/2026, https://digitalcollections.museumofflight.org/nodes/view/4703
![[Learadio Model R1 receiver and headphones]](/img/placeholder.gif?1762283163 "[Learadio Model R1 receiver and headphones]")