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1. Single layer coil
The single-layer coil is wound on a paper tube or bakelite bobbin with an insulated wire round by round. Such as the medium wave antenna coil of a transistor radio.
2. Honeycomb coil
If the plane of the wound choke coil inductor is not parallel to the rotating plane, but intersects at a certain angle, this coil is called a honeycomb coil. The number of times the wire is bent back and forth during one revolution is often referred to as the number of break points. The advantages of the honeycomb winding method are small size, small distributed capacitance, and large inductance. The honeycomb coil is wound by a honeycomb winding machine, the more folding points, the smaller the distributed capacitance
3. Ferrite core and iron powder core coil
The inductance of the choke coil inductor is related to the presence or absence of a magnetic core. Inserting a ferrite core into the air-core coil can increase the inductance and improve the quality factor of the coil.
4. Copper core coil
Copper core coils are widely used in the ultrashort wave range. The inductance is changed by rotating the position of the copper core in the coil. This adjustment is more convenient and durable.
5.Color coded inductors
Color-coded coil and inductor are inductors with fixed inductance, and their inductance is marked with a color ring in the same way as resistors.
6. Choke coil (choke coil)
The coil that restricts the passage of alternating current is called a choke coil, which is divided into a high-frequency choke coil and a low-frequency choke coil.
7. Deflection coil
The deflection yoke is the load of the output stage of the TV scanning circuit. The requirements of the deflection yoke are: high deflection sensitivity, uniform magnetic field, high Q value, small size, and low price.
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