French type "TM" triode
date: label: date made
content: ca 1915
notes: label: Description (Brief)
content: A 4-pin brass base (banana pins) with ceramic insulator, horizontal collector assembly, tipped G-shaped envelope. Appears similar to British type R valves. Written on press: "644" and "A Q". Stamped on base: "763". "World War I French army receiving tube, first type of vacuum tube type in world built on a true factory basis. Used for both reception and transmission."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from General Electric Research Laboratory, thru W. C. White and J. R. Morgan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315600
label: catalog number
content: 315600
label: accession number
content: 220105
label: collector/donor number
content: 397
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 4 in x 2 in; 10.16 cm x 5.08 cm