. Practical wireless telegraphy; a complete text book for students of radio communication . meter has range 0-25 amperes, the wattmeter, 0-3 kilowatts. For the standard yi K. W. set the motor is rated at 1 H. P., the generator at J^ K. voltage at the transformer is about 15,000 volts and the capacity of the closed circuitcondenser .004 microfarads. The inductance of the primary a\, the wave of 600 meters isapproximately 25,000 centimeters. Lesser values are, of course, employed for the 300 and450 meter waves. The secondary inductance would, of course, be the same as with the2 K. W. set.
. Practical wireless telegraphy; a complete text book for students of radio communication . meter has range 0-25 amperes, the wattmeter, 0-3 kilowatts. For the standard yi K. W. set the motor is rated at 1 H. P., the generator at J^ K. voltage at the transformer is about 15,000 volts and the capacity of the closed circuitcondenser .004 microfarads. The inductance of the primary a\, the wave of 600 meters isapproximately 25,000 centimeters. Lesser values are, of course, employed for the 300 and450 meter waves. The secondary inductance would, of course, be the same as with the2 K. W. set. PART FOR A RADIO TRANSMITTER SPARK DISCHARGERS — OSCILLATION TRANSFORMERS — CON-DENSERS—TRANSFORMERS. 100. In General. 101. Spark Dischargers for Radio Teleg-raphy. 102. Adjustment of the Spark Note. 103. Oscil-lation Transformers. 104. Aerial Tuning The Short Wave Condenser. 106. High PotentialCondensers. 107. High Frequency Choking Coils. Voltage Transformers. 109. Reactance Aerial Changeover Switch. 111. Transmitting 100. In General.—Although the apparatus of the radio transmitter hasbeen described and discussed in a fundamental way, certain important parts ofthe complete set will require more detailed treatment. Principal among theseare the various types of spark gaps, condensers, oscillation transformers, sig-nalling keys, etc., each of which may take one of several designs or may differin their mode of functioning. 101. Spark Dischargers for Radio-Telegraphy.—The functions of the spark gap in a radio-transmitter are: (1) to keep the closed oscillation circuit idle until the con-denser is fully charged; (2) to discharge the energy stored up in the condenser in the form of radio-frequent oscillations; (3) toquench the spark, i. e., to restore the gapto its non-conducting state, when theenergy has once been transferred to theantenna. The ideal gap would be one of in-finite resistance during the charging
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
