Marconi Fleming-type diode
date: label: date made
content: ca 1910
name: label: maker
content: Marconi Wireless Telegraph Co. Ltd.
notes: label: Description (Brief)
content: Brass bayonet base, two keystone-shaped (trapezoidal) plates with a filament suspended between, soldered filament connectors, cotton stem insulator. A 4" cloth insulated lead wire soldered to base shell. Tipped S-shaped envelope with taper at neck. No extant maker markings. Unit goes with socket 314084.02. The structure of the stem assembly matches the unit in the upper left corner of figure 3-11 in Tyne's "Saga of the Vacuum Tube." Tyne identifies the items in that figure as "Fleming valves used by American Marconi Company of America."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314084.01
label: catalog number
content: 314084.01
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: diode
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: tube: 3 3/8 in x 1 3/4 in; 8.5725 cm x 4.445 cm