. Practical wireless telegraphy; a complete text book for students of radio communication . his is approximately the correct setting for average working. The tension on thesprings attached to the upper contacts of the automatic starter should be adjusted for firmcontact with bar K. The circuit to the solenoid N is opened and closed at T-1 while contact T closes tne cir-cuit to a special magnet winding holding lever O upward in case of short circuit in thepower circuits. Contacts Y and Z throw a small resistance coil in series with the solenoidwinding after the starter has reached the full runn
. Practical wireless telegraphy; a complete text book for students of radio communication . his is approximately the correct setting for average working. The tension on thesprings attached to the upper contacts of the automatic starter should be adjusted for firmcontact with bar K. The circuit to the solenoid N is opened and closed at T-1 while contact T closes tne cir-cuit to a special magnet winding holding lever O upward in case of short circuit in thepower circuits. Contacts Y and Z throw a small resistance coil in series with the solenoidwinding after the starter has reached the full running position. A simple fundamentalwiring diagram of this starter appears in Fig. 75. (6) Adjustment of the Spark Note. In the adjustment of the note of the quenched sparkdischarger, it is to be understood that the pitch depends upon conditions of resonancebetween the open and closed oscillation circuits as well as upon the voltage of the regulation of the voltage, however, is the principal adjustment and the one to heundertaken -first (provided the set has been tuned).. Fig. 250—Special SubmarinePanel Transmi^tter (Americanconi Company). Mar- 230 PRACTICAL WIRELESS TELEGRAPHY. The operator should select a certain number of gaps, say eight, and follow it by varyingthe generator voltage. After the set has been tuned for maximum antenna current, thevoltage should be slightly readjusted until the spark is clear. It is easily seen that if the note is clear and the secondary circuit is thrown^ out ofresonance, less energy will be withdrawn from the closed oscillation circuit, which willincrease the voltage across the gap. The pitch of the note will therefore be destroyed. The rule to be followed is, tune the set first; afterwards adjust the gaps and voltage untilthe note is clear and the wattmeter indicates 2 kilowatts. The synchronous rotary gap is adjusted for a high pitched note by the small brass rodR and knob, Fig. 116, which moves the muffling drum carrying
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
