Converting ac to dc has been accomplished by several different types of rectifiers through the years. Here are a few of the more common types of rectifiers used in the past 100 years. Mercury arc ...
A cylindrical rectifier with hard rubber (?) end caps each fitted with a binding post. Twelve elements separated by insulators. No extant maker's marks. overall: 2 3/4 in x 1 7/8 in; 6.985 cm x 4.7625 ...
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