De Forest spherical "Audion" radio tube
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Brass candelabra screw base with glass insulator, two leads emerging from the top, side-tipped G-shaped envelope, two plates and two grids with a single filament. Loose material inside tube. Stamped: "572", written "Marconi / Infringement". Set in a porcelain candelabra socket. Similar to catalog number 313405 but with larger envelope allowing greater separation between plates and grids to permit use of higher voltage.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from DeForest-Sanabria Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313406
label: catalog number
content: 313406
label: accession number
content: 185243
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: tube only: 4 1/2 in x 2 1/2 in; 11.43 cm x 6.35 cm
label: Measurements
content: socket: 1 1/2 in x 1 1/2 in; 3.81 cm x 3.81 cm
label: Measurements
content: overall: 5 in x 2 1/2 in; 12.7 cm x 6.35 cm