De Forest "Vis-ion" type 601 glow lamp
date: label: date made
content: ca 1931
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A 4-pin plastic base with square plate electrode and square frame electrode, tipless T-shaped envelope. Molded in base: "De Forest / -Vis-ion- / -601-"; inked on press: "3063 / 3 22". Light source for mechanical television receiver.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Ethel DuMont
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.327765
label: catalog number
content: 327765
label: accession number
content: 270106
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: discharge lamp
label: Object Name
content: coronal discharge lamp
physicalDescription: label: Measurements
content: overall: 5 1/2 in x 2 in; 13.97 cm x 5.08 cm