Identifier2000-06-20_image_039SourceThe William P. and Moya Olsen Lear Papers (2000-06-20), Box 3, Folder 8DescriptionComposite 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 kc 35-watt telephone transmitter made for private pilots.
Inscription on verso: "The first 3105-3120 KC 35 watt telephone transmitter ever made for private fliers. Previously W. Elec. Co. was only source and had vertical monopoly of aviation communication -- I defied their patent monopoly and [illegible] out this 35 watt light weight pentode modulation unit -- mounted it in a 1933 Waco - Continental powered unit and went to Calif from NY - enroute many CAA stations heard a private aircraft on 3105 for the first time. WPL."Creation Datecirca 1931-1939SubjectLear DevelopmentsRadio--Transmitters and transmissionRadio in aeronauticsAids to air navigationExtent1 photograph : black and white ; 8 x 10 inOriginal Formatphotographic printscomposite photographsBibliographic CitationThe William P. and Moya Olsen Lear Papers/The Museum of FlightRightsCopyright undetermined
[Lear Developments telephone transmitter], [2000-06-20_image_039]. Museum of Flight Digital Collections, accessed 15/12/2025, https://digitalcollections.museumofflight.org/nodes/view/4685
![[Lear Developments telephone transmitter]](/img/placeholder.gif?1762209064 "[Lear Developments telephone transmitter]")