. Practical wireless telegraphy; a complete text book for students of radio communication . with different types of the case of the plain spark discharger,the pitch of the note while governedprimarily by the frequency of the alter-nator, is also dependent upon other factorssuch as, ■ (1) The length of the gap; (2) The voltage of the generator; (3) The capacity of the condenser; (4) The design of the spark electrodes; (5) Thenatiire of the surrounding mediumwhether gas or air. Now the capacity of the condenser inthe usual radio set is a fixed quantity,hence, the correct note for t
. Practical wireless telegraphy; a complete text book for students of radio communication . with different types of the case of the plain spark discharger,the pitch of the note while governedprimarily by the frequency of the alter-nator, is also dependent upon other factorssuch as, ■ (1) The length of the gap; (2) The voltage of the generator; (3) The capacity of the condenser; (4) The design of the spark electrodes; (5) Thenatiire of the surrounding mediumwhether gas or air. Now the capacity of the condenser inthe usual radio set is a fixed quantity,hence, the correct note for this gap is foundby increasing or decreasing the length ofthe discharge gap or by adjustment of thetransformer voltage. Blunt discharge electrodes give an ir-regular spark note whereas sharp pointed^Circll^s^TTV^pfrffAdiustid ^rlnfm^ti electrodes give a high pitched note, but they generally diminish the amplitude of theoscillation. A compromise between all these conditions is usually effected. The correct spark tone for the rotary gap is obtained by adjusting the position of the CLOSED. APPLIANCES FOR A RADIO TRANSMITTER. 107 stationary electrodes until synchronous discharges are obtained, and also by regulating thelength of the gap and the voltage of the transformer. The note of the quenched gap is adjusted by variation of the number of gaps or by regu-lation of the generator voltage. By proper adjustment, synchronous discharges are readilyobtained as will be evidenced by the uniformity of the note. (See Appendix, Section G.) 103. Oscillation Transformers.—^The functions performed by the oscilla-tion transformer of a radio-transmitter may be summed up as follows:(1) Transfers energy from the closed circuit to the open circuit; (2) Permits the wave length of either circuit to be. increased or decreased (by variation of the Self inductance of either coil); (3) Permits some adjustment of the damping of the oscillations flovying in the aerial system-The degree of coupling- betw
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
