Zetka type Z201A vacuum triode in original box
date: label: date made
content: ca 1927
notes: label: Description (Brief)
content: A 4-pin plastic base with tipless, S-shaped envelope. One paper label reads: "No replacement / if this label is / removed / +14773"; second paper label reads: ""Defective / Beardsley Specialty Co. / Rock Island, Ill." Stamped on base: "[Z logo] / Zetka / Proof". Audio frequency vacuum triode made by Zetka Laboratories, Newark, NJ. In original box. References: Tyne, "Saga of the Vacuum Tube," 365; https://www.radiomuseum.org/tubes/tube_z201a.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.241556.795
label: accession number
content: 241556
label: catalog number
content: 241556.795
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: composition (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: paper (box material)
label: Measurements
content: tube: 4 1/4 in x 1 3/4 in; 10.795 cm x 4.445 cm
label: Measurements
content: box: 5 1/2 in x 2 1/4 in x 2 1/4 in; 13.97 cm x 5.715 cm x 5.715 cm