RCA type 849 transmitting triode (late model)
date: label: date made
content: ca 1936
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: Double-ended tube with metal shell base, pin-and-blade contacts, and metal top contact. Cylindrical BT-shaped envelope. Marked on base shell, paper label on envelope near top reads: "#12915 / in - 42099 / out - 44[??]." Donor’s card reads: “Triode made by the General Electric Company for the Radio Corporation of America about 1936 or slightly before. The latest model of the 849 in [the Watson] collection. Electrically interchangeable with the early 849 tube [catalog number 324450], and with one dating from about 1930 with a metal plate is [catalog number 324460], but physically and mechanically improved by greatly stiffening the plate and grid supports, the substitution of a carbon plate for metal, and so on.”
label: Description (Brief)
content: A three electrode transmitting triode with a thoriated-tungsten filament, air-cooled, for use on a Class A and Class B audio-frequency amplifier and oscillator. Reference: https://www.radiomuseum.org/tubes/tube_849.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324459
label: catalog number
content: 324459
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 14 in x 4 in; 35.56 cm x 10.16 cm