1. The position of the magnetic loop inductor coil should meet the design requirements. The relative position of the coil assembly position and other various components should meet the design requirements, otherwise it will affect the normal operation of the whole machine. For example, the position of the high-frequency choke coil and the magnetic antenna in a simple semiconductor radio should be properly arranged, and the antenna coil and the oscillating coil should be perpendicular to each other, which avoids the influence of mutual coupling.

2. Before using the magnetic ring in the front of the device, check the structure of the coil before using it. Check whether the structure of the coil is firm, whether the wire is loose or loose, whether the wire contact is loose, whether the core rotation is flexible, whether there is any Slide buckle, etc. These aspects are checked and then installed.

3, the magnetic ring for the cable needs to be fine-tuned during the use process, should consider the fine-tuning method, some magnetic ring coils need to be fine-tuned during use, and it is very inconvenient to change the number of coil turns. Therefore, fine-tuning should be considered when selecting Methods. For example, a single-layer coil can adopt a method of removing the number of trapped coils at the end point, that is, winding about 3 to 4 turns at one end of the coil in advance, and when the fine adjustment is performed, the position can be changed to change the inductance. Practice has proved that this adjustment method can achieve fine-tuning ±2%-±3% inductance. For coils used in short-wave and ultra-short-wave circuits, a half turn is often left as a fine adjustment, and the half-turn is removed or folded to change the inductance and achieve fine adjustment. The fine adjustment of the multi-layer segment coil can be realized by moving the relative distance of one segment. The number of turns of the movable segment should be 20%-30% of the total number of turns. It is proved that this fine adjustment range can reach 10%-15 % The coil with the magnetic core can be fine-tuned by adjusting the position of the magnetic core in the coil tube.

4. Use the magnetic ring for the cable to pay attention to the inductance of the original coil. When the coil is in use, do not change the shape of the coil. The size and distance between the coils, otherwise it will affect the original inductance of the coil. In particular, the higher the frequency, that is, the smaller the number of turns. Therefore, the high-frequency coils currently used in television sets are generally sealed and fixed with high-frequency wax or other media materials. In addition, it should be noted that during maintenance, do not arbitrarily change or adjust the position of the original coil to avoid detuning.

5, the adjustable coil device should be easy to adjust, the adjustable coil should be installed in the easy-to-adjust position of the machine, in order to adjust the inductance of the coil to achieve the best working condition.