RCA type 12SJ7 sharp cutoff pentode
date: label: date made
content: ca 1940
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: An 8-pin base with plastic insulator and center post, metal T-shaped envelope. Stamped: “Made in U.S.A. / H6E / [RCA logo] / SC 278 A”. Donor’s card reads: “Sharp cutoff pentode made by the Radio Corporation of America for the US government. Metal type used as a radio frequency amplifier and biased detector in AC/DC radio receivers. Electrically interchangeable with the type 12-SJ-7-GT [catalog number 325260]. Heater type: 12.6 volts at .15 ampere.” See also: https://www.radiomuseum.org/tubes/tube_12sj7.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.325275
label: catalog number
content: 325275
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 2 1/2 in x 1 1/4 in; 6.35 cm x 3.175 cm