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In 1930, Eduard Karplus joined the engineering staff of [[General Radio|General Radio Corporation]] in Cambridge, Massachusetts, where he designed and developed measuring instruments, including work on early models of oscilloscopes. | In 1930, Eduard Karplus joined the engineering staff of [[General Radio|General Radio Corporation]] in Cambridge, Massachusetts, where he designed and developed measuring instruments, including work on early models of oscilloscopes. | ||
In 1938, he became a Fellow of the IRE. | |||
Karplus' best-known invention is the development of the first practical, continuously adjustable variable-ratio autotransformer, which General Radio introduced under the "[[Variac]]" brand name (short for "variable AC") in 1933. | Karplus' best-known invention is the development of the first practical, continuously adjustable variable-ratio autotransformer, which General Radio introduced under the "[[Variac]]" brand name (short for "variable AC") in 1933. | ||
In the 1940s and 1950, Karplus continued to work on microwave topics such as signal generators, including the design of the [[GR-874 connector|GR-874 hermaphroditic high-frequency connector]]. | In the 1940s and 1950, Karplus continued to work on microwave topics such as signal generators, including the design of the [[GR-874 connector|GR-874 hermaphroditic high-frequency connector]]. | ||
[https://www.worldradiohistory.com/Archive-IRE/60s/IRE-Directory-1960-Members.pdf IRE Directory 1960]: | |||
:KARPLUS, Eduard (A'31-F'38), Engineer, General Radio Company, 22 Baker Ave., West Concord, Mass. | |||
:Born: September 7, 1899, Moedling, Austria. Ingenieur, 1923, Technische Hochschule, Vienna, Austria. | |||
==Links== | ==Links== |