De Forest "Vis-ion" type 601 glow lamp
date: label: Date made
content: c1932
label: date made
content: ca 1932
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: "1792 / 25 12". 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 Richard G. Marshall
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2005.0151.01
label: accession number
content: 2005.0151
label: catalog number
content: 2005.0151.01
label: model number
content: 601
objectType: label: Object Name
content: discharge lamp
label: Object Name
content: coronal discharge lamp
physicalDescription: label: Measurements
content: overall: 14 cm x 5.1 cm; 5 1/2 in x 2 in