. Practical wireless telegraphy; a complete text book for students of radio communication . = =^ C-3C-4 ii^ P B Fig. 165b—Tune Circuits of Type 107a Tuner. In the diagram. Fig. 165-b, L-1 is the aerial tuning inductance, the value of which isaltered by means of a multi-point switch mounted on the left hand front of the tuner. C-1 is the short wave variable condenser connected in series with the aerial system. Inthe full scale position it short circuits itself and is thus cut out of the antenna circuit. Thiscondenser is mounted on the left hand side on the top of the tuner. L-2 is the primar
. Practical wireless telegraphy; a complete text book for students of radio communication . = =^ C-3C-4 ii^ P B Fig. 165b—Tune Circuits of Type 107a Tuner. In the diagram. Fig. 165-b, L-1 is the aerial tuning inductance, the value of which isaltered by means of a multi-point switch mounted on the left hand front of the tuner. C-1 is the short wave variable condenser connected in series with the aerial system. Inthe full scale position it short circuits itself and is thus cut out of the antenna circuit. Thiscondenser is mounted on the left hand side on the top of the tuner. L-2 is the primary winding of the receiving tuner and has a fixed value of inductance(not variable). 146 PRACTICAL WIRELESS TELEGRAPHY. Coil L-3, condenser C-2, coil L-4 comprise the intermediate circuit. L-3 is of fixed valueand is in inductive relation to L-2. L-4 has the same dimensions as L-3, but it is in in-ductive relation to coil L-5. The wave length of this circuit is varied by means of a condenser Fig. 165c—Standby Short Wave Circuits of 107a Tuner. Coils L-3 and L-4 are wound on balls or spheres, mounted on a shaft so they can beturned at a right angle to L-2 and L-S, simultaneously. This is effected by means of the;oupling knob mounted on the right hand end of the tuner, and thus the coupling betweenthe intermediate circuit and the antenna and detector circuits is varied as required. SHORT -WAVECOH06MSER DETECTOR NTtqMEOIATECONOENSeR POTENTIO-M6TER
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
