National Union type 30 medium-Mu triode
date: label: date made
content: ca 1924
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: A 4-pin plastic base with domed envelope. Donor’s card reads: “Medium Mu triode made by the National Union Radio Corporation, Orange, N.J. in the 1920s. Used as a detector or voltage amplifier in battery operated radio receivers. Filament: 2 volts at .06 ampere.”
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.324608
label: catalog number
content: 324608
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 in x 1 1/2 in; 10.16 cm x 3.81 cm