Tung-Sol type 12SJ7GT sharp cutoff pentode
date: label: date made
content: ca 1940
name: label: maker
content: Tung-Sol
notes: label: Description (Brief)
content: An 8-pin metal base with plastic insulator and center post, T-shaped envelope. Stamped: “12SJ7 / GT / Tung-Sol / Made in U.S.A.” Donor’s card reads: “Sharp cutoff pentode made by Tung-Sol Electric Company. Glass octal type used as a radio frequency amplifier and biased detector in AC/DC radio receivers. Except for heater voltage, this tube is similar to the metal type 6-SJ-7 [catalog number 324672] and the 6-SJ-7-GT [catalog number 325004].” See also: https://www.radiomuseum.org/tubes/tube_12sj7gt.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.325260
label: catalog number
content: 325260
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: 3 1/8 in x 1 1/4 in; 7.9375 cm x 3.175 cm