Cunningham type CX299 triode in a Sylvania SX-199 box
date: label: date made
content: ca 1925
name: label: maker
content: E. T. Cunningham, Inc.
notes: label: Description (Brief)
content: A 4-pin plastic base, long pins, tipless T-shaped envelope, silvered. Stamped on base: "Cunningham / CX 299 / Licensed only to extent indicated on carton". "C" logo stamped on envelope. A paper label reads: "Beardsley's / Rock Island Ill. / "Everything in Radio" / Tested 2 1/2". Found in a box that originally contained a Sylvania type SX-199 triode. Reference: https://www.radiomuseum.org/tubes/tube_cx299.html.
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 F. Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN80503U07
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
physicalDescription: label: Physical Description
content: composition (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: tube: 3 5/8 in x 1 1/8 in; 9.2075 cm x 2.8575 cm
label: Measurements
content: box: 4 in x 1 3/4 in x 1 3/4 in; 10.16 cm x 4.445 cm x 4.445 cm