Dumont type 1-U-4 sharp cutoff pentode
name: label: maker
content: DuMont Company
notes: label: Description (Brief)
content: A 7-pin glass base with tipped T-shaped envelope. Miniature tube. Stamped: "Dumont / Made in U.S.A. / 623”. Donor’s card reads: “Sharp cutoff pentode made by Dumont. Used as a radio frequency or intermediate frequency amplifier in stages not controlled by AVC in light-weight compact portable battery-operated radio receivers. Because #2 grid can be dropping at the same voltage as the plate, a voltage dropping resistor is not needed in resistance coupled amplifiers. Filament type: 1.4 volts at .05 ampere. 110 volts DC maximum on the plate and grid #2.” See also: https://www.radiomuseum.org/tubes/tube_1u4.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.324936
label: catalog number
content: 324936
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 1/4 in x 5/8 in; 5.715 cm x 1.5875 cm