Jefferson model 280 radio tube charger
date: label: date made
content: ca 1925
name: label: maker
content: Jefferson Electric Mfg Co.
notes: label: Description (Brief)
content: Marked on plate: "Jefferson No. 280 / Radio Tube Charger / [directions] / Jefferson Electric Mfg. Co. / Chicago, USA"; on unit: "110 volts 50-133 cycles." A radio tube filament activator for thorium type tubes. A standard 201-A socket is mounted on a metal frame with a slot arrangement permitting high or low voltages to be placed across the filament pins.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
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.321286
label: catalog number
content: 321286
label: accession number
content: 241556
label: model number
content: 280
objectType: label: Object Name
content: tube changer
label: Object Name
content: tube charger
label: Object Name
content: tube renovator
label: Object Name
content: tube rejuvenator
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 3 1/2 in x 2 3/4 in; 8.89 cm x 8.89 cm x 6.985 cm