73. Radio,, 1927-1981

Summary: Documents CR's testing and research on the reliability of radios. Includes correspondence, catalogs, advertisements, testing procedures, newspapers and magazine clippings, projects, test results, purchase forms, operating instructions, charts, and notes. Subjects include the testing, repair, installation, circuits and standard and specifications for radio receivers; radio sets (1927-1950); radio tuners; FM tuners; FM-AM tuners; FM receivers; FM stereo multiplex; frequency modulation; signal generators; table model radios; portable radios; small radios; radio tubes; radio communications; radio interference; radar; radio broadcasting; automobile radios; citizen's ban (CB) radios and other intercommunication systems; antennas and aerial eliminators. Some brands tested are Ansley, Allied, Crosley, Emerson, General Electric, Lafayette, Magnavox, Montgomery Ward, Sears, Motorola, Packard Bell, RCA, Stromberg-Carlson, Philco, Westinghouse, and Zenith. See Stereos and Sound Reproduction series for related components and combined stereos and radios.