. Practical wireless telegraphy; a complete text book for students of radio communication . e A, C, the primary winding of the closed core transformer P, the circuitincluding the wattmeter W. The secondary circuit comprises the secondary winding of thetransformer S, the high potential condenser C-1, spark gap G and the primary winding of theoscillation transformer P-1. The aerial circuit is represented by the secondary winding S-1,the short wave condenser C-2 and the aerial tuning inductance S-2. The circuit of the emergency induction coil extends from the D. C switch at the left ofthe drawing
. Practical wireless telegraphy; a complete text book for students of radio communication . e A, C, the primary winding of the closed core transformer P, the circuitincluding the wattmeter W. The secondary circuit comprises the secondary winding of thetransformer S, the high potential condenser C-1, spark gap G and the primary winding of theoscillation transformer P-1. The aerial circuit is represented by the secondary winding S-1,the short wave condenser C-2 and the aerial tuning inductance S-2. The circuit of the emergency induction coil extends from the D. C switch at the left ofthe drawing, though the underload circuit breaker B, through the regulating resistance R, toa 24-30-volt storage battery shunted by a small voltmeter V. The charging resistance R isproportioned to pass from 6 to 7 amperes through the storage battery during the chargingprocess. The function of the underload circuit breaker has been described in Part V, andit is sufficient to say here that it automatically opens the circuit in case the voltage of thegenerator falls below that of the storage 6V. 24 VOLT STORAGEBATTERY a V. 6 V. Fig. 204—Plain Aerial Emergency Transmitter. (o) Adjustment and Tuning of the Set. To place the storage battery oncharge, the D. C. switch is closed and the plunger U of the underload circuitbreaker pushed upward by hand, the charging circuit thereby being closed throughthe contact points E, E. The circuit from the battery to the induction coil may be traced through thetelegraph key, through the primary winding of the induction coil P-3, and thencethrough the interrupter I, the vibrator condenser being represented at K. Inorder that a uniform spark discharge may be obtained, careful adjustment mustbe made of the stationary contact of the interrupter I until a discharge free fromarcing is secured, but generally at its best the pitch of the note produced by thesecoils will be rather low. In case of accident to the power apparatus, such as the burning out of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
