Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 181
ting screw. The vibrating tongue R is acted upon by the flux of the poles A, B,and the corresponding fluctuations of the battery B-2 not only circulate through the wind-ings W-2 and thereby amplify the vibrations of R, but these currents also pass through astep-up transformer, having the primary… … Fig. 197b—Supersensitive Brown Amplification Relay. RECEIVING CIRCUITS, DETECTORS, TUNING APPARATUS. 171
Telegraph, Wireless
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