. Practical wireless telegraphy; a complete text book for students of radio communication . isobtained by the wave length changing switch D, which completely disconnects the unusedturns from the circuit. The functioning of the switch is as follows: In one position the switch blade D isconnected to the high potential end of winding L-5 through contact point A; but a longerwave length adjustment is obtained by placing the switch on point B, which connects thereceiving detector to the high potential end of L-4, and at the same time the lower righthand contacts alongside the switch spring together
. Practical wireless telegraphy; a complete text book for students of radio communication . isobtained by the wave length changing switch D, which completely disconnects the unusedturns from the circuit. The functioning of the switch is as follows: In one position the switch blade D isconnected to the high potential end of winding L-5 through contact point A; but a longerwave length adjustment is obtained by placing the switch on point B, which connects thereceiving detector to the high potential end of L-4, and at the same time the lower righthand contacts alongside the switch spring together, joining the high potential end of L-Sto the low potential end of L-4. The same function is performed by switch point C andthe upper right hand set of contacts. The secondary condenser shown at C-3 possesses at maximum very low capacity. Thepotentiometer P-2 is shunted across the battery B-2. A protective choke is indicated atP-4 and a safety gap at R. The telephone condenser C-2 is of fixed capacity. A novel feature of this tuner is the magnets M-1 and M-2, which are joined-to battery. Fig. 177—Universal Crystal Receiver (English Marconi Company). 158 PRACTICAL WIRELESS TELEGRAPHY.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
