General Electric 2 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, a contact post extending from the skirt and around the bulb to the top. Tipless P-shaped envelope. 2 amp rating. Donor’s card reads: “Tungar rectifier bulb made by the General Electric Company with a capacity of 2 to 2.5 amperes of rectified current. This tube was sold in a single bulb unit by GE as a charger at a competitive price with others on the market in the 1920s. Two of these bulbs were used by some charger manufacturers in a full wave rectifying circuit, from a transformer power source, with a very material gain in efficiency. Too small as a half-wave rectifier at 2.5 amps to effectively charge a radio and automobile battery.”
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.324442
label: catalog number
content: 324442
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 7/8 in x 2 1/4 in; 12.3825 cm x 5.715 cm