. Practical wireless telegraphy; a complete text book for students of radio communication . i inchin diameter. The adjacent turns ofthe primary winding are well insu-lated by means of specially designedporcelain insulators. The secondary ismade up of heavy stranded insulatedcopper cable wound on a hard rubberspool. Since the inductance of the secondary is fixed, variation of the fre-quency of the oscillations is secured by adjustment of the aerial tuning secondary winding is mounted so that it can be turned at a complete right Fig. 119—Type A Oscillation Transformer of theAmeric
. Practical wireless telegraphy; a complete text book for students of radio communication . i inchin diameter. The adjacent turns ofthe primary winding are well insu-lated by means of specially designedporcelain insulators. The secondary ismade up of heavy stranded insulatedcopper cable wound on a hard rubberspool. Since the inductance of the secondary is fixed, variation of the fre-quency of the oscillations is secured by adjustment of the aerial tuning secondary winding is mounted so that it can be turned at a complete right Fig. 119—Type A Oscillation Transformer of theAmerican Marconi Company. 108 PRACTICAL WIRELESS TELEGRAPHY. angle to the primary or at any required intermediate position, which permits closeregulation of the transformer coupling. The effect of tilting the secondary at aright angle to the primary is shown in Fig. 120 where the coupling is practicallyzero. It will be seen that the lines of force of the primary are parallel with the. COPPER 5TWP, VARIABLECONTACT
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
