. Practical wireless telegraphy; a complete text book for students of radio communication . he conditions favorable to one offset the conditions favorable to theother; hence we are required to effect a compromise. The exact meaning of the logarithmjc decrement of the oscillations in radio-telegraphymay be better understood by considering the oscillating movements of a pendulum in me-chanics. Suppose for example a plumb bob is attached to the end of a string and suspendedfreely as in Fig. lOSa; drawn to one side and released, the bob will vibrate to and fro untilthe oscillation is completely da
. Practical wireless telegraphy; a complete text book for students of radio communication . he conditions favorable to one offset the conditions favorable to theother; hence we are required to effect a compromise. The exact meaning of the logarithmjc decrement of the oscillations in radio-telegraphymay be better understood by considering the oscillating movements of a pendulum in me-chanics. Suppose for example a plumb bob is attached to the end of a string and suspendedfreely as in Fig. lOSa; drawn to one side and released, the bob will vibrate to and fro untilthe oscillation is completely damped out. If a piece of cardboard, for instance, were attachedto the string, the oscillations of the pendulum would come to a stop in a much shorter period,e. g., they would be said to be highly damped. This corresponds to the damping of the oscil-lations in a radio oscillation circuit having considerable resistance. Now the time period of one complete oscillation of the pendulum can be obtained bycounting the oscillations for one minute and dividing their number by 60. Hence if 60 com-. Oscillations with Excessive Damping. 92 PRACTICAL WIRELESS TELEGRAPHY.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
