Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 356
Fig. 8.—Current in Arc Circuitsin Poulsen System … ID C H POULSEN RECEIVING STATION A, Aerial Wire; c, Condensers; D, Detector; h, Helices; t, Uelephone
Electrical engineering
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