. Practical wireless telegraphy; a complete text book for students of radio communication . two transformer primary switches,the primary loading coil switch, the primary condenser, and the primary condenser switchwhich is marked out series and shunt. The purpose of this switch is to connect theprimary condenser in series or in parallel to the aerial or to disconnect the condenserentirely. RECEIVING CIRCUITS, DETECTORS, TUNING APPARATUS. 155 Thus for long wave lengths the condenser is placed in shunt to the primary windingand for waves below the fundamental period of the aerial the condenser is
. Practical wireless telegraphy; a complete text book for students of radio communication . two transformer primary switches,the primary loading coil switch, the primary condenser, and the primary condenser switchwhich is marked out series and shunt. The purpose of this switch is to connect theprimary condenser in series or in parallel to the aerial or to disconnect the condenserentirely. RECEIVING CIRCUITS, DETECTORS, TUNING APPARATUS. 155 Thus for long wave lengths the condenser is placed in shunt to the primary windingand for waves below the fundamental period of the aerial the condenser is thrown inseries with the primary winding. The function of the three other primary switches is to vary the number of turns ofinductance in the aerial circuit. The secondary circuit contains the transformer secondary coil, the inductance of whichis varied by the transformer secondary switch, the secondary condenser, the cerusite andthe carborundum detectors, the switch for connecting either of these two in the circuit,the potentiometer, and the switch marked sent, receive. ; ANTENNA BUZZER PUSH BUTTON CONNECTIONS TO NAVY Vtfl ^NOTSROVm Fig. 175—Fundamental Diagram Type 101 Receiving Tuner. The transformer secondary is moved in or out of the transformer primary coil bymeans of the handle marked coupling. The capacity of the secondary condenser isvaried by rotation of its handle, and the potential across the carborundum detector isvaried by the rotation of the potentiometer handle. Supplied with this set is a mahogany box containing four dry cells having three bindingposts, marked 1, 2, and 3. Nos. 1 and 2 connect to the two binding posts on the receiverimmediately under the word battery, while No. 3 is connected to the post at the extremeright on the same level with test switch. This post completes the circuit from the batteryto the test tuner. Since the detectors work better with the battery current flowing in a certain direction,it is necessary to determine e
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
