Abstract: A thread type magnetic core structure, including: a magnetic core having a thread formed on the outer surface of the core; and a resin structure of a rod type fixedly mounted on one end surface of the magnetic core in the longitudinal direction of the core, the resin structure having an engaging member at the top portion of the resin structure, and the engaging member being adapted to couple to a driver for rotating the magnetic core, wherein the engaging member is formed in a polygonal shape in section including a triangle, and the outer periphery of the resin structure having the polygonal engaging member is set within the circumference of the magnetic core.

Abstract: A high frequency coil arrangement, comprising an input side coil and an output side coil electromagnetically coupled with each other, the input side coil being divided into two coil elements having substantially equal inductances by provision of a tap, characterized in that two parallel tuner capacitors are provided for the two coil elements for providing two tuner circuits of equal frequencies, and that a further separate capacitor is provided and connected with both ends of the input side coil for adjustment of its tuning frequency.