. An elementary manual of radiotelegraphy and radiotelephony for students and operators . the rotor coils having frequencies of 10,000 and 30,000respectively, which circulate in the two tuned inductive-capacitycircuits connected to the rotor. Again the currents of frequency 10,000 and 30,000 act toproduce in the stator currents of 20,000 and 40,000 an external circuit tuned for 20,000 has been connected to thestator, the current of this frequency can be taken up in it. Lastly,if an aerial wire or antenna is connected to the stator tuned for afrequency of 40,000 by proper adjust
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . the rotor coils having frequencies of 10,000 and 30,000respectively, which circulate in the two tuned inductive-capacitycircuits connected to the rotor. Again the currents of frequency 10,000 and 30,000 act toproduce in the stator currents of 20,000 and 40,000 an external circuit tuned for 20,000 has been connected to thestator, the current of this frequency can be taken up in it. Lastly,if an aerial wire or antenna is connected to the stator tuned for afrequency of 40,000 by proper adjustment of its inductance, isconnected to the stator, we should be able to set up in it con-tinuous electric oscillations of this last frequency. One important effect remains to be noticed. It will be seenthat there are pairs of currents of the same frequency which occurin the rotor and stator. Thus for the frequency 10,000, there isone current induced iu the rotor by its rotation in the steady or Fig. 6.—Diagram conuections ofGoldschmidt alternator. UNDAMPED ELFXTRIC 89. o (i4 90 RADIOTELEGRAPHY exciting field of the stator, and one current of the same frequencyproduced by the reaction of the current of frequency 20,000occurring the stator. Also for the frequency 20,000 there are apair of currents in the stator. These pairs of currents are nearlyin opposite phase, and hence more or less nullify each the only unbalanced current is the final current ofhighest frequency. Hence by means of an alternator in connection with capacityshunts, as they are called, Goldschmidt was able to provide themeans of mechanically generating extra high frequency it is not very convenient to employ a large number of shunts,the number of steps by which the frequency is raised is in practicelimited to 4 or 5. Therefore starting with an alternating currentof 10,000, we can easily increase this to 40,000, A frequencyof 40,000 corresponds to a wave length of 25,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
