Slide rules designed for Electronic engineering do exist their main forte is the calculation of impedance of circuit elements in the higher frequency ranges i.e. 0 (Direct Current) to a few hundred Hertz (Hz). The calculations are normally limited to power system frequencies i.e. It is usually a rule with the scales of the standard Rietz system, supplemented with Log Log scales, motor/dynamo efficiency scales and a scale for voltage drop calculation. Definition of an Elektro Rule A rule to aid the electrical engineer in solving specific problems. This paper examines the design of such rules and poses a few questions on the layout of the scales and their overall usefulness. 1 ELEKTRO RULES Their use and scales Robert Adams BE Introduction Of the speciality rules, perhaps the most ubiquitous is the Elektro rule, almost every manufacturer of slide rules produced an Elektro rule.
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