Northern Manufacturing "Marathon" type MX240 vacuum triode
date: label: date made
content: 1926
name: label: maker
content: Northern Manufacturing Co.
notes: label: Description (Brief)
content: A plastic 4-pin base with mostly silvered S-shaped envelope. In original package with 1926 copyright date. Stamped on base: "Marathon / MX-240"; label: "[logo] / Marathon / Triumph in Radio Tubes / Trade Mark". Reference: https://www.radiomuseum.org/tubes/tube_mx240.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 Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323233
label: catalog number
content: 323233
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: tube: 4 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm
label: Measurements
content: box: 5 1/4 in x 2 1/2 in x 2 1/2 in; 13.335 cm x 6.35 cm x 6.35 cm