. An elementary manual of radiotelegraphy and radiotelephony for students and operators . Fig. 17. Fig. 18. carry electric charges of opposite sign, so that the distribution ofpotential for the fundamental oscillation is represented in Fig. 17by the radial distance of the dotted line from the thick blackone representing the oscillatory circuit. The amplitude of theconduction current in the wire may be represented by the radialordinate of another line, and this is a maximum at the spark gap,and has a minimum but not zero value at the condenser the first harmonic oscillation of such
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . Fig. 17. Fig. 18. carry electric charges of opposite sign, so that the distribution ofpotential for the fundamental oscillation is represented in Fig. 17by the radial distance of the dotted line from the thick blackone representing the oscillatory circuit. The amplitude of theconduction current in the wire may be represented by the radialordinate of another line, and this is a maximum at the spark gap,and has a minimum but not zero value at the condenser the first harmonic oscillation of such a circuit there are threenodes of potential and three antinodes, as shown by the radialordinates of the dotted line in Fig. 18, and similarly, three placesof minimum amplitude of the conduction current. It is,however, much more difficult to excite these harmonics whenthe capacity is concentrated or localised than when it is dis-tributed throughout the circuit as is the case in an aerial wireor antenna. This production of fundamental and harmonic oscillations inan antenna can be very b
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
