Amperite type 3TF4A ballast tube
name: label: maker
content: Amperite
notes: label: Description (Brief)
content: 9-pin glass base, 3 mica insulators, with tipped, T-shaped envelope. Coiled tungsten filaments. Stamped: "Amperite / ballast / 3TF4A".
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323132
label: catalog number
content: 323132
label: accession number
content: 241556
objectType: label: Object Name
content: Ballast Tube
label: Object Name
content: ballast
label: Object Name
content: resistance
label: Other Terms
content: Ballast Tube; Resistance
physicalDescription: label: Measurements
content: overall: 2 3/4 in x 7/8 in; 6.985 cm x 2.2225 cm