. Practical physics. nsmitting station (Fig. 457, (1) ) is depressedto allow a current from the alternator A to pass through the primarycoil P of a transformer T^, the frequency of the alternations in practicebeing usually about 500 cycles per second. The high-voltage currentinduced in the secondary S charges the condenser C-^ until its potentialrises high enough to cause a spark discharge to take place across thegap s. This discharge of Cj is oscillatory (§ 485), and the oscillationsthus produced in the condenser circuit containing Cj, s, and L^ may, ina low-power short-wave transmitting set,
. Practical physics. nsmitting station (Fig. 457, (1) ) is depressedto allow a current from the alternator A to pass through the primarycoil P of a transformer T^, the frequency of the alternations in practicebeing usually about 500 cycles per second. The high-voltage currentinduced in the secondary S charges the condenser C-^ until its potentialrises high enough to cause a spark discharge to take place across thegap s. This discharge of Cj is oscillatory (§ 485), and the oscillationsthus produced in the condenser circuit containing Cj, s, and L^ may, ina low-power short-wave transmitting set, have a fi-equency as high as1,000,000 per second. An oscillation frequency much lower than thisis generally used and is subject to the control of the operator through 424 INVISIBLE KADIATIONS the sliding contact c, precisely as in the case illustrated iu Fig. oscillations in the condenser circuit induce oscillations in the aerial-wire system, which is tuned to resonance with it through the slidingcontact Transmitting Station
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
