General Electric experimental vacuum tube
date: label: date made
content: ca 1917
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: No base. Five lead stubs emerge from the bottom with remnants of hardened plastic insulation. Asbestos insulation in stem. A glass spine supports the assembly which consists of two helical grids set side by side inside a oval anode. A single arch filament is mounted such that one filament leg is in each helix. Crimp connectors. Tipped T-shaped envelope. No extant maker's marks. The construction is very similar to GE units from around the time of WWI.
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.314070
label: catalog number
content: 314070
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: electron tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 3/4 in x 1 3/4 in; 14.605 cm x 4.445 cm