Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 354
roughly proportional to its length,caused less waste of energy in heating. Inrecent long-distance stations a comparativelyIf (about 70,000 cycles per sec) has beenadopted, since such currents are found tobe less interfered with by varying atmos-pheric conditions, and give practically as good… … Fig. 6.—Feesenden Receiver with Interference PreTenter A, Aerial wire. B, Inductance. c,c>,F, Variable capa-cities. D,E,Di, El, Transformers. Q, Detector. T, Tele-phone, p, Potential divider. H, Earth. A,B,C,D,H istimed to desired frequency. A,B, Ci,Di,H is then ciosedand timed to cut out…
Electrical engineering
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