Cartridge-type enclosed gap
date: label: date made
content: ca 1915
notes: label: Description (Brief)
content: A double-ended tube with two brass caps, tipless tubular envelope, two cylindrical carbon elements with a mica separator. No extant maker's marks.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314096
label: catalog number
content: 314096
label: accession number
content: 195337
objectType: label: Object Name
content: Tube, Ballast
label: Object Name
content: resistance
label: Other Terms
content: Tube, Ballast; Resistance
physicalDescription: label: Measurements
content: overall: 2 1/4 in x .5625 cm; 5.715 cm x 7/32 in