Experimental Marconi triode
name: label: maker
content: Marconi
notes: label: Description (Brief)
content: No base. Four copper leads emerge from the bottom, two with plastic insulators, woven cotton insulator. Spiral tungsten filament with crimp connectors, circular grid and flat plate. Tipped T-shaped envelope, no extant maker's marks.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Marshall N. Waterman, Frances Waterman and Ruth Waterman Ritch
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313461
label: catalog number
content: 313461
label: accession number
content: 187068
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 without leads: 4 in x 1 1/4 in; 10.16 cm x 3.175 cm