| 摘要 |
PURPOSE:To improve the balance of inductance and capacitance of a primary coil and a secondary coil by a method wherein a pair of wires are twisted together to make one line to form the primary coil and one wire is wound to the direction opposite to that of the primary coil to form the secondary coil. CONSTITUTION:A parallel wire W4, which is composed of a pair of wires W1 and W4 which are insulated and closely laid in parallel, is wound around a core center 14' without twisting. Two lead parts of the parallel wire 4, which are drawn out of a core 14, are separated into two wires. A lead part W1' of one wire W1 of one end and a lead part W2' of another wire W2 of another end are twisted in front of the core center 14' to form a one line center tap 17. After the core 14 is turned 180 deg. upside down, one wire W3 is wound around the core center 14' from the back end 14d of the core to the direction opposite to that of the parallel wire W4. As a result, the secondary coil 16 is formed by winding the wire W3 around the core center 14' to the direction opposite to that of the primary coil 15 so that the balance of inductance and capacitance of the primary coil 15 and the secondary coil 16 is improved.
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