EHT rectifier

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• Metal rectifier — Selenium rectifier A metal rectifier is an early type of semiconductor rectifier in which the semiconductor is copper oxide or selenium. They were used in power applications to convert alternating current to direct current in devices such as… …   Wikipedia

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• John Vincent Lawless Hogan — Infobox Scientist name = John Vincent Lawless Hogan caption = birth date = birth date|1890|2|14 birth place = Philadelphia death date = death date and age|1960|12|29|1890|2|14 death place = residence = United States nationality =American field =… …   Wikipedia

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