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Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)

Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 80

An illustration from Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute, 1910, leaf 80
Mnltiiik. Currents required wlien coils in multii^le :— Standard A, 20 to 30 milliamperes.Standard B, 30 to 40 milliamperes. Currents required when coils in series :— Standard A, 10 to 15 milliamperes.Standard B, 15 to 20 milliamperes. The standard relay is adjustable neutrally, that is, whenits…

Telegraph

Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.

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