Title: Power Supply Characteristics of Electrical Systems in Foreign Countries

Abstract

Until in recent years, electrical current characteristics of power supplies in foreign countries was of importance mostly to the electrical appliance manufacturer with an export trade. With the shrkinking of distances between countries by modern transportation such information is now of great importanct to many groups, especially to those groups working in areas employing recording and reproducing apparatus where the speed and consequently the pitch of the recorded material is a function of the frequency of the electrical supply current.