An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 621
transformer in that it has no iron core. Theprimary, which consists ofa few turns of heavy wire, isconnected in series with aspark gap and a condenser.When the spark gap isconnected across the second-ary of an induction coil, orbetter, with the secondaryof a step-up transformer,the condenser is… … Fig. 406. Direct-coupled transmittingstation. ELECTROMAGNETIC WAVES 555 primary coil act inductively on the secondary coil. On accountof the extreme rapidity of change of current in the primarythe electromotive force induced in the secondary is very high. In the direct-coupled system an…
Electricity · Magnetism
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