An elementary manual of radiotelegraphy and radiotelephony for students and operators (1916)
Fleming, J. A. (John Ambrose), Sir, 1849-1945 · London, Longmans, Green & co. · leaf 352
transformer or byresonance, but it is necessary to have high frequency. K. A. Fessenden (see The Electrician, Vol. 61, p. 441, 1908)has constructed a high frequency alternator direct coupled to aDe Laval turbine, giving a current at 225 volts, with a frequencyof 75,000 and about 2*5 kw. output. The… … {Reproduced hy permission from The Electrician.Fig. 3.—High Frequency Turbo-Alternator (Fessenden). Also Alexanderson has constructed high frequency inductoralternators as described in Chapter III. A disadvantage of such machines is that they are non-portableand not suitable for use on board ship.…
Radio · Telegraph, Wireless · Telephone, Wireless
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