General Electric / Cunningham type CX-350 triode
date: label: date made
content: 1928
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: A 4-pin plastic base with tipless S-shaped envelope. Base stamped: “[C logo] / Cunningham / -CX 350-". Donor’s card reads: “Triode made by the General Electric Company for E.T. Cunningham of San Francisco. A duplicate of the UX-250 tube sold by the Radio Corporation of America. Dates from February 1928. Extensively used by radio receiver manufacturers as the audio output tube for home broadcast receivers. Also used by amateurs as modulators in low powered transmitters. Filament: 7.5 volts at 014 amperes. Class A audio operation: 450 volts on the plate; 84 volts negative control grid bias for an output of 4.6 watts.” See also: https://www.radiomuseum.org/tubes/tube_cx350.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.324413
label: catalog number
content: 324413
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: 6 in x 2 1/2 in; 15.24 cm x 6.35 cm