Confidence automatic tube tester
date: label: date made
content: ca 1936
name: label: maker
content: Apparatus Design Co.
notes: label: Description (Brief)
content: Marked: "Confidence / Automatic / English Reading Radio / Tube / Tester / Distributed by Earl N. Webber Co. / Daily News Bldg. / Chicago, Ill." Also: "Manufactured by Apparatus Design Co. / Little Rock, Ark. / Model B." A portable tube tester in carrying case with meter marked red (BAD), white (GOOD), and yellow sections indicating tube status. Eighteen tube sockets are provided with tube types marked on a chart attached inside the instrument's hinged lid. Instrument is designed for AC operation, 103-130 volts, 60 cycles, and has directions affixed to tube chart. Panel is of bakelite construction and has a 55-position switch for adjustment to particular tube. Cathode to heater, and grid to filament short test buttons are also provided on the panel. Sockets 9-18 are on top lid of instrument with a connection plug to main panel. Sockets 9-18 appear to have been included for the more recent tube types.
label: Location
content: Currently not on view
place: label: place made
content: United States: Arkansas
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.321468
label: catalog number
content: 321468
label: accession number
content: 241556
label: model number
content: B
objectType: label: Object Name
content: vacuum tube tester
label: Object Name
content: tube tester
physicalDescription: label: Measurements
content: overall: 5 in x 13 3/4 in x 8 3/4 in; 12.7 cm x 34.925 cm x 22.225 cm