Radio Instrument Service tube tester
name: label: maker
content: Radio Instrument Co.
notes: label: Description (Brief)
content: Marked: "[RIS logo] Radio Instrument Service / 2502 S. Wabash Ave. / Chicago, U.S.A. / Pat. Appl'd for." Unit has a plate millimeter reading 0-25 mils. Sockets for 201-A and UV-199 type triodes are arranged by filament voltages (2, 4 & 6 volts). Four knife switches on the bakelite panel control grid biasing. Five binding posts.
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.321514
label: catalog number
content: 321514
label: accession number
content: 241556
objectType: label: Object Name
content: vacuum tube tester
label: Object Name
content: tube tester
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 13 3/4 in x 9 1/2 in; 10.795 cm x 34.925 cm x 24.13 cm