Western Electric type 257A vacuum triode
date: label: date made
content: ca 1932
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: Plastic base with four brass pins. Base is loose. T-shaped envelope with top contact. Getter stain on inner wall. Marked: "Western Electric / Made in U.S.A. / -257A-" "The 257A tube is similar to the 231D tube except that the grid terminal of the 257A tube is at the top of the bulb. An important feature of the 257A tube is its low filament power consumption. Applications: Audio-frequency and intermediate-frequency amplifier, detector, oscillator." References: https://www.westernelectric.com/s/257A.pdf, and https://www.radiomuseum.org/tubes/tube_257a.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.321067
label: catalog number
content: 321067
label: accession number
content: 241556
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 3/8 in x 1 in; 11.1125 cm x 2.54 cm