National Union type 27 vacuum triode
date: label: date made
content: ca 1937
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: A plastic 5-pin base with mica insulator, domed envelope. Stamped on base: "National / Union / J"; paper label reads: "At Your Service [candlestick telephone logo] / [handwritten] ok / 11/3/37[?]. Stamped on envelope: "27 / Made in U.S.A.". Reference: https://www.radiomuseum.org/tubes/tube_27.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 Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN80552U11
objectType: label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: composition (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: electron tube: 10 cm x 3.5 cm; 3 15/16 in x 1 3/8 in
label: Measurements
content: overall: 4 in x 1 1/2 in; 10.16 cm x 3.81 cm