. Practical wireless telegraphy; a complete text book for students of radio communication . as follows: The small pushbutton marked Test immediately to the right hand side of the receiving tuner closes thecircuit from the battery to the buzzer which oermits the manipulator to obtain the bestadjustment of the crystal. When turned to the right this button is locked in position. Thetwo switches on the front of the Type 106 tuner marked transformer primary vary theinductance of the primary circuit. The switch marked Units cuts in a single turn at atime. The switch marked Tens varies the primary in
. Practical wireless telegraphy; a complete text book for students of radio communication . as follows: The small pushbutton marked Test immediately to the right hand side of the receiving tuner closes thecircuit from the battery to the buzzer which oermits the manipulator to obtain the bestadjustment of the crystal. When turned to the right this button is locked in position. Thetwo switches on the front of the Type 106 tuner marked transformer primary vary theinductance of the primary circuit. The switch marked Units cuts in a single turn at atime. The switch marked Tens varies the primary inductance in groups of ten turns ateach point of contact. 154 PRACTICAL WIRELESS TELEGRAPHY. The primary condenser has minimum capacity in the zero position but if turned to the180° mark it is shunted by a special set of contacts (attached to the movable plates andthus cut out of the aerial cirpuit. All control handles attached to the inductance changingswitches and variable condensers of the primary and secondary circuits should be turnedcounter clockwise for increase of their Fig. 174—Rear View Type 101 Receiving Tuner (American Marconi Company). The switch marked transformer secondary and the control handle marked secondarycondenser control the inductance and capacity of the secondary circuit. The wave lengthadjustment of the circuit can be increased by turning the switch or the knob of the con-denser counter clockwise. Different values of inductance and capacity can be employed inthis circuit while holding the same wave length. This changes the damping of the circuitand proper proportioning (of inductance and capacity) may give increased strength ofsignals during the reception of signals from certain stations. The control handle marked potentiometer varies the flow of current through the de-tector crystal. Close adjustment of the potentiometer is necessary when the incomingsignals are comparatively weak. The switch marked battery turns the local battery cur-rent
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
