Western Electric type 721A radar tube
date: label: date made
content: ca 1942
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A double-ended cylindrical glass tube with two metal disc contacts set perpendicular to the tube axis. Tip on one end, contact on the other. Stamped on envelope: “Western Electric / Made in U.S.A. / 721A / 5207". A switching tube for transmitter and receiver ("T.R. tube") mounted on plastic display base. Reference: https://www.radiomuseum.org/tubes/tube_721a.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313257
label: catalog number
content: 313257
label: accession number
content: 175549
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
physicalDescription: label: Measurements
content: overall: 3 in x 1 1/2 in; 7.62 cm x 3.81 cm