Northern Manufacturing "Marathon" type 27 vacuum triode
date: label: date made
content: ca 1930
name: label: maker
content: Northern Manufacturing Co.
notes: label: Description (Brief)
content: A plastic 5-pin base with mica insulator and mesh grid (single support wing),S-shaped envelope. Stamped on base: "Marathon"; penciled: "OK". Paper label reads: "Date Sold [blank] / Date Tested [blank] / Good [checked] / Fair / Bad / Replace / With / Tung-Sol / D. G. ER[worn] / Radio [worn] / Rock [Island, Ill.] / Phone: [worn]". Faded stamping on top of envelope? Reference: https://www.radiomuseum.org/tubes/tube_27.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.321197
label: catalog number
content: 321197
label: accession number
content: 241556
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm