Sylvania type 721B gas discharge triode
date: label: date made
content: ca 1943
name: label: maker
content: Sylvania Electric Products Inc.
notes: label: Description (Brief)
content: A double-ended cylindrical glass tube with two metal disc contacts set perpendicular to the tube axis. Stamped on envelope: “Sylvania / Made in U.S.A. / 721B” and "A83D". Donor’s card reads: “Gas discharge tube made by the Sylvania Corporation for the US government during World War II. Similar in application to the type 702-A tube [catalog number 324789].”
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.324790
label: catalog number
content: 324790
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: 3 1/8 in x 1 1/2 in; 7.9375 cm x 3.81 cm