. An elementary manual of radiotelegraphy and radiotelephony for students and operators . Fig. 6. turn or two of a small inductance which forms part of the con-denser circuit, and another overwound circuit 5 to 10 turns in ►=-fi. wimmM^mmmmmmmw: \_% FiQ. with the antenna, and with a tuning inductance, L (see Fig. 7). 244 RADIOTELEGRAPHY This last method possesses the great advantage that the closenessof coupling of the antenna and condenser circuit can be varied. It has already been shown in Chapter I., that when two oscilla-tion circuits are connected together inductively, and in tun
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . Fig. 6. turn or two of a small inductance which forms part of the con-denser circuit, and another overwound circuit 5 to 10 turns in ►=-fi. wimmM^mmmmmmmw: \_% FiQ. with the antenna, and with a tuning inductance, L (see Fig. 7). 244 RADIOTELEGRAPHY This last method possesses the great advantage that the closenessof coupling of the antenna and condenser circuit can be varied. It has already been shown in Chapter I., that when two oscilla-tion circuits are connected together inductively, and in tune withone another, oscillations set up in one circuit result in the produc-tion of oscillations in both circuits, having two frequencies, onegreater and the other less than the natural frequency of eachcircuit when separate. Hence, when we are employing an induc-tively coupled antenna which has been syntonised with thecondenser circuit, and an unquenched spark discharger, oscillationsof two frequencies are set up in the antenna, and waves of twowave lengths radiated from it, one greater and the other less thanthe wave length corresponding to the natural frequency of theantenna taken alone. One of these waves has greater a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
