GE type UV-216 "Kenotron" tube
date: label: date made
content: ca 1922
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: Kenotron tube, 4-pin brass base, tipped S-shaped envelope. Donor card reads: "Diode, made for the Radio Corporation of America and listed in their first catalog of tubes, dated 1 June 1922. A part of their original line of tubes. Known as a kenotron rectifier. Rated at 20 watts output at a maximum of 350 volts. Filament: 7.5 volts at 2.35 amperes. This tube sold for $7.50 in 1922. Pure tungsten filament. Made by the General Electric Company. Put on sale by RCA in 1921." Anode: 550 volts AC.
label: Description (Brief)
content: See also: Tyne, "Saga of the Vacuum Tube," pages 322-323; W. C. White, "The Tron Family," Electronic Industries, Jan. 1946, notes that the term "kenotron" was coined by Irving Langmiur in 1915 to mean "vacuum instrument."
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.324349
label: catalog number
content: 324349
label: accession number
content: 252994
objectType: label: Object Name
content: kenotron
label: Object Name
content: diode
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 2 1/8 in; 12.7 cm x 5.3975 cm