. An elementary manual of radiotelegraphy and radiotelephony for students and operators . the corresponding expanding circular lines ofmagnetic force which togetlier constitute the radiation. When a jdain earthed antenna has electrical oscillationsexcited in it which are the first harmonic of its fundamental,the frequency of these oscillations is three times that of the 172 RADIOTELEGRAPH Y fundamental oscillation, whilst the wave length is one-third. Inthe case of the second harmonic the frequency is live times andthe wave length one-fifth of that of the fundamental. In the case of a closed o
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . the corresponding expanding circular lines ofmagnetic force which togetlier constitute the radiation. When a jdain earthed antenna has electrical oscillationsexcited in it which are the first harmonic of its fundamental,the frequency of these oscillations is three times that of the 172 RADIOTELEGRAPH Y fundamental oscillation, whilst the wave length is one-third. Inthe case of the second harmonic the frequency is live times andthe wave length one-fifth of that of the fundamental. In the case of a closed or nearly closed oscillatory circuit, wecan also set up oscillations which are either a fundamental or aliigher harmonic. Thus, in the case of a closed circuit consistingof a condenser and a circle of wire, with a spark gap opposite tothe condenser (see Fig. 17), the fundamental oscillation involvesa conduction current to and fro in the circuit with a node ofpotential at the centre of the spark gap and loops or antinodesof potential at the condenser plates. The condenser plates always.
Size: 1538px × 1625px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
