RCA type 12SQ7 "Radiotron" twin diode triode
date: label: date made
content: ca 1939
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A double diode-triode for audio frequency use, with an 8-pin base and metal envelope. In original package. Marked: "RCA Radiotron / Made in U.S.A. / 12SQ7 / XE1 / Licensed / as stated / on carton." Many patents are listed on the carton, the earliest is 1385873 from 1921, the latest 2108987 from 1938. Reference: https://www.radiomuseum.org/tubes/tube_12sq7.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: EM.313888
label: catalog number
content: 313888
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: dual diode
label: Object Name
content: triode
physicalDescription: label: Measurements
content: tube: 2 5/8 in x 1 1/8 in; 6.6675 cm x 2.8575 cm
label: Measurements
content: package: 2 1/2 in x 1 1/2 in x 1 3/8 in; 6.35 cm x 3.81 cm x 3.4925 cm