RCA "Radiola" model AR 812 superheterodyne radio receiver
date: label: date made
content: 1924
label: date made
content: ca 1924
name: label: maker
content: RCA Corporation
notes: label: Description (Brief)
content: Marked: (Plate) "Radiola Superhetrodyne Model AR812 No. 145451, Range 220-550 Meters. Patented: 1/21/08; 3/5/12; 10/6/14; 7/3/17; 10/22/18; 6/27/20; 6/8/20; 2/18/16; 9/11/17; 12/13/19; 3/16/20; 8/10/20; 4/19/21; 5/10/21; 12/27/21; 6/19/23". Unit is quite similar to the Radiola Super VIII, except that the cabinet is semi-portable and normally has a carrying strap (broken off). Weight is 35 pounds (16 kg). A loop antenna employed with receiver is of the fixed type. Six UV-199 tubes (missing) are utilized in a circuit developed by Harry Houck, an associate of Armstrong. In this arrangement the incoming signal frequency is combined with the second harmonic of a local oscillator to produce the desired intermediate frequency. Owing to station repetition on the dial, this principle was abandoned commercially after 1928. Allied Van Lines tag 60 on front of object. Reference: Langley Set Index, page 58. Radiola Superheterodyne Data Sheet, 1 March 1924; Radiola Superheterodyne-Instructions, 1925; Clark collection: Battery Radiolas, page 113.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320821
label: accession number
content: 241556
label: catalog number
content: 320821
label: model number
content: 145451
objectType: label: Object Name
content: radio receiver
physicalDescription: label: Measurements
content: overall: 11 1/2 in x 34 1/2 in x 11 1/2 in; 29.21 cm x 87.63 cm x 29.21 cm