Western Electric type 212-E power triode
date: label: date made
content: ca 1935
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin metal base with T-shaped envelope. Donor’s card reads: “Power triode made by Western Electric Company in the 1930s. A modernized version of the type 212-D tube [catalog number 324551]. Used mostly as an audio frequency amplifier. Thoriated tungsten filament: 14 volts at 6 amperes. In Class A with 1500 volts on the plate and a 57 volt negative control grid bias, this tube will give 50 watts undistorted output at audio frequencies. In Class B with 1500 volts on the plate, 50 volts negative control grid bias, an output of about 250 watts of audio can be obtained.” See also: https://www.radiomuseum.org/tubes/tube_212e.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.324814
label: catalog number
content: 324814
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: 12 1/2 in x 3 1/2 in; 31.75 cm x 8.89 cm