Practical Wireless Telegraphy a Complete Text book for Students of Radio Commu
Practical Wireless Telegraphy a Complete Text book for Students of Radio Commu
Elmer Eustice Bucher
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Generally with this connection, it becomes necessary to reduce the length of the spark gap G, and in case a quenched spark gap is employed, to use no more than two or three plates. If a rotary gap is included in the power transmitter, it must be stopped with the spark electrodes in such position as will afford a dis- charge gap of the correct length for the coil. Since the closed and open oscillation circuits of the transmitter are already adjusted to resonance, the complete process of tuning n...eed not be gone over again, with the exception that the coupling between the primary winding P-l and the secondary winding S-l may have to be increased. The ammeter connected in the antenna circuit of this set should read from 2 to 3 amperes, depending upon the electrical dimensions of the circuits of radio-frequency, or, in other words the type of set. The range of transmission varies from 125 to 225 miles in daylight. AUXILIARY TRANSMITTER CIRCUIT Fig. 205 Tuned Coil Emergency Transmitter. The coil transmitters are generally supplied with the portable chloride type D-5 accumulator of the Electric Storage Battery Company, but later installations are equipped with another type known as the 5 K.
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