French "Metros" triode
date: label: date made
content: ca 1919
notes: label: Description (Brief)
content: A metal base with 4 long pins, horizonal plate and grid assembly, and tipped G-shaped envelope. Made about 1919. No information on donor’s card. For a similar tube (catalog number 324334) the donor noted: “The general purpose type in Europe of the World War 1 period. Generally considered a "hard" (high vacuum) tube, it was a very satisfactory detector, amplifier, and oscillator. Filament is high temperature, tungsten wire, 5 volts at about 1 ampere."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324439
label: catalog number
content: 324439
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 2 1/4 in; 11.43 cm x 5.715 cm