Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 119
r— WW 1 … -1 s Fig. 12. The secondary winding of a sending transformer, /, isintroduced between the armature of the transmitter andthe junction of the neutral relay windings. The primarywinding of this transformer receives current from thealternator A (frequency from 60 to 125 cycles) whenthe armature of the…
Telegraph
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