Summary
Dual diode, helium filled cold cathode (air cooled) full wave rectifier. Introduced in 1926 for the manufacture of B eliminators and DC power supplies capable of supplying the filaments of Type 199 valves connected in series to allow radios to be operated from the AC mains before the introduction of the first indirectly heated valves.
Maximum AC voltage per plate is 350V. Maximum plate current is 125mA.
Manufactured by Raytheon Mfg. Co. Cambridge, MA, USA
Physical Description
Conical glass bulb with four pin UX style base and exhaust tip on top.
More Information
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Acquisition Information
Unknown Acquisition Method from Unknown Source, 1981
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Manufacturer
Raytheon Manufacturing Co., Cambridge, Massachusetts, United States of America, circa 1927
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Inscriptions
Bulb: none Paper label on bulb - partially burnt off: (patent numbers)/RAYTHEON MFG. CO.,Cambridge, Mass. Paper label on base: B-H Base: RAYTHEON/TYPE B-H
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Classification
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Type of item
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Overall Dimensions
107 mm (Length), 44 mm (Outside Diameter)
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