French Mazda type 199 vacuum triode
date: label: date made
content: ca 1922
notes: label: Description (Brief)
content: A 4-pin metal base with brass banana pins and ceramic insulator, tipped T-shaped envelope. Stamped: "6/100 / Mazda". Label found with tube reads: "French Mazda equivalent of the American 199 type using standard French 4 pin base. It is considerably larger and cruder than the American tube and has a 4 volt filament, but still requires only the .06 amperes filament current of the American 199."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from McMurdo Silver Corp., thru McMurdo Silver
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.311570
label: catalog number
content: 311570
label: accession number
content: 146541
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 4 3/8 in x 1 1/8 in; 11.1125 cm x 2.8575 cm