. Practical physics. nnnnnnnii Fig. 463. Keetititd oscillations rarely go outside the limits of 100 and 3000 vibrations persecond. They are represented by the irregular line in Fig. vibrations of the diaphragms of the receivers, therefore, Fig. 464. Audiii-fre(]ueiicy variations correspond to the vibrations of the voice of the speaker atthe distant transmitting station. 490. Method of producing continuous waves. One of themost important of the different means of producing high-power continuous waves is by use of the Alexanderson high-frequency alternator (see on opposite page). This is
. Practical physics. nnnnnnnii Fig. 463. Keetititd oscillations rarely go outside the limits of 100 and 3000 vibrations persecond. They are represented by the irregular line in Fig. vibrations of the diaphragms of the receivers, therefore, Fig. 464. Audiii-fre(]ueiicy variations correspond to the vibrations of the voice of the speaker atthe distant transmitting station. 490. Method of producing continuous waves. One of themost important of the different means of producing high-power continuous waves is by use of the Alexanderson high-frequency alternator (see on opposite page). This is analternating-current dynamo made in various powers up to200 kilowatts (=268 horse power), the rotor in some of themachines having the very high speed of 20,000 revolutionsper minute. For transoceanic telegraphy these machines causecurrents of from 600 to 1200 amperes to oscillate in the sendingaeriak Tliis powerful sustained oscillation of electrons in anaiirial produces continuous electromagnetic waves (Fig. 461).. - 2 g s ^ b S> V u ^ 03 03 1^ 9 *^ H is
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
