A Compact, inexpensive A-C network analyzer

THE great usefulness of network analyzers (a-c calculating boards) for making power-system studies is now generally recognized. The number of a-c boards has increased from the first two, which went into service in 1929.1, 2 to more than 25 at present.3 Most of the existing a-c boards are in the United States, but there is at least one each in Canada, England, Brazil, and India. The studies made on these boards undoubtedly have resulted in economies in capital expenditures in power systems equal in value to many times the cost of the studies themselves.