General Electric type 12B7 vacuum pentode
date: label: Date made
content: March 1939
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: An 8-pin metal base with glass insulators, T-shaped metal envelope. Stamped on side: "Type / 12B7 / General [logo] Electric". GE logo molded on top. Paper label reads: "June / 1939 / #6310". Paper tag reads: "One of the first lot of soldered tin tubes supplied for actual use at Bridgeport. Made Mar. 1939". Reference: https://www.radiomuseum.org/tubes/tube_12b7ml.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 the American Museum of Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1979.0299.81
label: accession number
content: 1979.0299
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
physicalDescription: label: Measurements
content: overall: 2 1/2 in x 1 1/4 in; 6.35 cm x 3.175 cm