Master-Craft tube renewer
date: label: date made
content: 1927
notes: label: Description (Brief)
content: Marked on box: Master-Craft / Tube / Renewer / Will Rejuvenate / any type of Radio / Tubes on the bat- / teries of your set. / Makes / Old Tubes / Like New / Price: $1.00 / One Old Tube / Renewed Pays For it. / Master-Craft Products Co. / 3803 N. Clark St., Chicago." Unit is a small energizer for vacuum tubes of the 199 or 201A type. A high voltage is placed across the filament of the tube resulting in a greater thorium coating being deposited on the filament surface. Includes original box and instruction sheet. Reference: Instruction leaflet furnished with unit.
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.321707
label: accession number
content: 241556
label: catalog number
content: 321707
objectType: label: Object Name
content: tube renewer
label: Object Name
content: tube restorer
physicalDescription: label: Measurements
content: overall: 3/4 in x 4 1/8 in x 1 1/2 in; 1.905 cm x 10.4775 cm x 3.81 cm