General Electric type 6680 / 12-AU-7 medium-Mu twin triode
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: A 9-pin glass base with tipped T-shaped envelope. Miniature tube. Stamped: "6680 / 12AU7”. Donor’s card reads: “Medium-Mu twin triode made by General Electric Company. Used as a phase inverter or amplifier in AC/DC radio equipment, and in many diversified applications such as multivibrators, or oscillators in industrial control devices. Also used as a combination vertical oscillator and vertical amplifier and as horizontal deflection oscillator in television receivers. Center tapped heater arranged for either 6.3 or 12.6 volt operation. Each plate maximum 300 volts and a negative control grid bias of 50 volts.” See also: https://www.radiomuseum.org/tubes/tube_6680.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.324842
label: catalog number
content: 324842
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 2 1/4 in x 3/4 in; 5.715 cm x 1.905 cm