General Electric type 991 voltage regulator
date: label: date made
content: ca 1935
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: Brass candelabra screw base with glass insulator. Top hat electrode, T-shaped envelope with neck. Stamped: “W 105 [?] 23V”. Donor’s card reads: “Voltage regulator made by the General Electric Company from 1938 or before. Glow [coronal] discharge type similar to [catalog number 325041] except for the base. Voltage regulation from 55 to 62.5 volts, and current from .5 to 2 milliamps. See also: https://www.radiomuseum.org/tubes/tube_991.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 Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325040
label: catalog number
content: 325040
label: accession number
content: 252994
objectType: label: Object Name
content: Voltage Regulator
label: Object Name
content: coronal discharge lamp
label: Object Name
content: glow lamp
label: Other Terms
content: Voltage Regulator; Electron Tubes
physicalDescription: label: Measurements
content: overall: 1 1/2 in x 1/2 in; 3.81 cm x 1.27 cm