Sterling model R-401 tube tester
date: label: date made
content: 1927
name: label: maker
content: Sterling
notes: label: Description (Brief)
content: Marked: "Sterling R-401 / Vacuum Tube Tester / Serial No. 2563 / The Sterling Mfg. Co. Cleveland, Ohio, U.S.A." Unit is designed to test standard 201-A and 301-A triodes by measuring plate current on a 0-10 mil. meter. Current readings are checked against standard measurements for good tubes on instruction label and differences noted to indicate efficiency of tube. Test plug and cloth insulated cord are provided. Original price: $15.00. Reference: Wyeth Hardware & Mfg Co, Catalog, 1927. https://www.radiomuseum.org/r/sterling_vacuum_tube_tester_r_401.html.
label: Location
content: Currently not on view
place: label: place made
content: United States: Ohio, Cleveland
label: place made
content: United States: Ohio, Cleveland
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.321495
label: accession number
content: 241556
label: catalog number
content: 321495
label: serial number
content: 2563
objectType: label: Object Name
content: tube tester
physicalDescription: label: Measurements
content: overall: 2 1/4 in x 7 in x 3 7/8 in; 5.715 cm x 17.78 cm x 9.8425 cm