General Electric 1 amp “Tungar” rectifier tube
date: label: date made
content: ca 1922
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: Single-ended tube with a brass admedium base insulated skirt and two glass insulators. Tipless T-shaped envelope. 1 amp rating. Donor’s card reads: “Tungar rectifier bulb made by the General Electric Company in the 1920s. 1 ampere capacity. This bulb was used as a half-wave rectifier in a device of the time called a trickle charger. Trickle chargers were connected to a radio battery and the the AC lines at all times. In actual practice, after the battery had been used for a while, there was a tendency for the battery to polarize and later for the plates to dissolve and drop to the bottom of the cell. Also, being connected all the time, this device added considerably to a power bill.”
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324443
label: catalog number
content: 324443
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: diode
label: Object Name
content: rectifier
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 in x 1 1/2 in; 10.16 cm x 3.81 cm