Western Electric type 247A "Special" vacuum triode
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 5-pin plastic base with circular mesh plate, top contact. S-shaped envelope. Markings: "Special / 247-A"; and "X554477" stamped on tube. This tube has a top contact, unlike the other 247A tubes and may be experimental. The tube does not match the specification sheet at https://www.westernelectric.com/s/247A.pdf.
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.323057
label: catalog number
content: 323057
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: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm