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 193
ransmitting centre—where an ordinaryduplex set modified can be used. By this means dis-tances of several hundred miles have been covered.No. 1 station is the ordinary C.B. omnibus set. No. 2station shows the same set, but Avith a Wlieatstone trans-mitter and galvanometer added for Wheatstone… … changes and adjustments are necessary :—At an up stationreverse batteries; at a down station reverse D and {U)oi relay.Switch must remain at duplex. . ert 8000 in the rheostat, TELEGRAPH SYSTEMS 183 4 m.f. in the condenser, and 500 in the retardation coil atthe outset. The maximum resistance in the…
Telegraph
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