Tung-Sol type 7F7 high-Mu twin triode
date: label: date made
content: ca 1940
name: label: maker
content: Tung-Sol
notes: label: Description (Brief)
content: An 8-pin metal base with center post, T-shaped envelope. Stamped: “Tung-Sol / Made in U.S.A.” Donor’s card reads: “High-Mu twin triode made by the Tung-Sol Corporation. Glass lock-in type. Used as a phase inverter or a resistance coupled amplifier in radio receivers. Heater type: 6.3 volts at .3 ampere.” See also: https://www.radiomuseum.org/tubes/tube_7f7.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.325116
label: catalog number
content: 325116
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: double triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 3 3/4 in x 1 1/4 in; 9.525 cm x 3.175 cm