Sears type 1-B-1 “Silvertone” ballast tube
date: label: date made
content: ca 1924
notes: label: Description (Brief)
content: A 4-pin plastic base with domed envelope. Donor’s card reads: “Ballast tube made for Sears, Roebuck & Co. for use in their “Silvertone” line of radio receivers. Dates from the 1920s. Maximum current: 360 milliamperes. Maximum voltage drop: 1 volt.”
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.324606
label: catalog number
content: 324606
label: accession number
content: 252994
objectType: label: Object Name
content: Ballast Tube
label: Object Name
content: resistance
label: Other Terms
content: Ballast Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 in x 1 1/2 in; 10.16 cm x 3.81 cm