. Practical wireless telegraphy; a complete text book for students of radio communication . DiS. APPLIANCES FOR A RADIO TRANSMITTER. 103 that the spark discharge shifts rapidly from one set of stationary electrodes to the otherthereby preventing the discharge points from overheating. Other modified types of thisdischarger are in use but they operate on the same fundamental principle. The principal advantage of the non-synchronous discharger is that it produces amusical spark tone from a source of low frequencyalternating current. As will be seenfrom the diagram of Fig. 115, although the conden
. Practical wireless telegraphy; a complete text book for students of radio communication . DiS. APPLIANCES FOR A RADIO TRANSMITTER. 103 that the spark discharge shifts rapidly from one set of stationary electrodes to the otherthereby preventing the discharge points from overheating. Other modified types of thisdischarger are in use but they operate on the same fundamental principle. The principal advantage of the non-synchronous discharger is that it produces amusical spark tone from a source of low frequencyalternating current. As will be seenfrom the diagram of Fig. 115, although the condenser is discharged at a uniform rate, suc-cessive discharges are not of constant amplitude. In Fig. 115 the successive maximumamfplitudes of the charging current are indicated at points a, b, c, d, e, f, g, etc., and the instant during the cycle at which theA C ^ ^ ^ spark discharges by the mark X. It is easily seen that the spark frequency isvery much greater than the frequencyof the charging current, but the suc-cessive spark discharges are not ofconstant power; but since they aretimed unif
Size: 2657px × 941px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
