Ballard, William Cyrus, Jr · New York [etc.] McGraw-Hill company, inc. · leaf 120
movement,hence if the sound currents are large the volume of soundproduced may be enorinous. The makers claim that imder RECEIVING EQUIPMENT 95 favorable conditions sound has been transmitted a distanceof several miles by its use. The moving coil is composed of comparatively few turns of rather… … Fig. 46.—Electrodynamic type of loud speaker. signal. The coil on the transformer with the larger numberof turns is connected in place of the radio receiver, and theone with the smaller number is connected to the moving coil.Where efficient operation is desired the last stage of theamplifier should…
Radio
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