An electrical device that converts alternating current (AC) to direct current (DC) is the rectifier. The simple process of rectification produces a type of DC characterized by pulsating voltages and ...

Plastic 4-pin base, top contact, S-shaped envelope. Donor’s card reads: “Half-wave mercury vapor rectifier made by Westinghouse for the US government during World War II. This tube is the Westinghouse ...

A 4-pin plastic base with top cap, domed envelope. Stamped on base: “CBS / Made in U.S.A.” Donor’s card reads: “Half-wave mercury vapor rectifier made by CBS-Hytron. Used in the power supply of radio ...