National Union type 48 tetrode
date: label: date made
content: ca 1936
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: A plastic 6-pin base with domed envelope. Stamped on base: “NU / Electron Tube / Made in U.S.A."; on envelope: "48". Donor’s card reads: “Tetrode made by National Union Radio Corporation, Orange, NJ, about 1936. Used in the output stage of radio receivers designed to operate from direct current power lines. Heater type: 30 volts at .4 ampere. Output about 2.5 watts.”
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.324963
label: catalog number
content: 324963
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 1/4 in x 2 in; 13.335 cm x 5.08 cm