Telefunken radio ballast tube
date: label: date made
content: ca 1919
name: label: maker
content: Telefunken
notes: label: Description (Brief)
content: A ballast resistance tube similar to the AEG tubes used with a Telefunken RE11 vacuum triode. Two brass end caps with flat contacts, glass envelope, axially-mounted tungsten filament on copper leads. Stamped on one cap: "0.54A .3[?]V"; "538" written on opposite tab.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the Museum of Science and Industry (Chicago)
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.330630.2
label: accession number
content: 271855
label: catalog number
content: 330630.2
label: collector/donor number
content: 30.452
objectType: label: Object Name
content: Ballast Tube
label: Object Name
content: resistance
physicalDescription: label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: ballast tube: 2 in x 25/32 in x 15/32 in; 5.08 cm x 2.0066 cm x 1.1938 cm