De Forest type DV3A "Audion" triode in original can
date: label: date made
content: 1921
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: De Forest type DV3A "Audion" triode in original can. Ceramic ("isolantite") intermediate base shell with 4-pins and maker stamp (under masking tape), tipped T-shape envelope, silvered with test label. "De Forest - 3 Volt Dry Cell Audion", handwritten test information: "Tested / By Dealer / Rochester N.Y. / Date 10-7-21 In presence / of D. T. Jones Jr. / Purchaser." Also, "[8215?]" (sn?) stamped on envelope. Metal cylindrical can has a sticker with the Type DV3A information. Reference: Tyne, "Saga of the Vacuum Tube," pages 300-306.
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.323215
label: catalog number
content: 323215
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: triode
physicalDescription: label: Physical Description
content: metal (cylindrical container material)
label: Measurements
content: tube: 3 1/4 in x 1 3/8 in; 8.255 cm x 3.4925 cm
label: Measurements
content: package: 5 5/8 in x 2 1/8 in; 14.2875 cm x 5.3975 cm