Summary
This type of valve was called a Tungar bulb; it is an argon filled half wave rectifier diode. Tungar bulbs were mainly used in battery chargers. They were introduced in 1917 and remained popular until efficient solid state rectifiers became available. This example was intended for fairly high voltage use, the maximum output being 90 volts at up to 6 amps. Its RMA type number is 4B26.
Physical Description
Elongated spherical bulb with a short neck with a re-entrant seal with a metal pin at one end and a Mogul Edison screw base at the other. It is in its original box.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from P. T. Brown, 20 Sep 1970
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Manufacturer
General Electric Co (GE), United States of America, 1940-1950
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Inscriptions
On brass base: TUNGAR BULB (GE logo) CAT. 189049 MADE IN U.S.A. SC Paper label on end of box: Tungar BULB/ CAT./189049/ 6 Amperes/ GENERAL ELECTRIC CO./MADE IN U.S.A./NP-23260-A Continuation of paper label on side of box: GENERAL ELECTRIC CO./MADE IN U.S.A./ Faint acceptance stamp: PASSED/PMG ?/?/MELB On opposite side of box: Paper label with handwritten summary of the use of the bulb and some data.
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
175 mm (Length), 80 mm (Outside Diameter)
Box: 105 x 105 x 210 mm
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Keywords