single-layer coil
The single-layer coil is wrapped around a paper tube or bakelite skeleton with insulated wires. Such as transistor radio medium wave antenna coil.
honeycomb coil
If the coil is wound, its plane is not parallel to the plane of rotation, but intersects at a certain angle, this coil is called a honeycomb coil. And its rotation, the number of times the wire bends back and forth, often called the fold number. The advantages of the honeycomb winding method are small size, small distributed capacitance and large inductance. Beehive coils are wound by using a beehive winding machine. The more folding points, the smaller the distributed capacitance.
Ferrite core and iron powder core coil
The inductance of the coil is related to the presence or absence of a magnetic core. Inserting a ferrite core in the air core coil can increase the inductance and improve the quality factor of the coil.
copper core coil
The copper core coil is widely used in the ultrashort wave range. The position of the rotating copper core in the coil is used to change the inductance. This adjustment is more convenient and durable.
color code inductance coil
It is a high-frequency inductance coil, which is wrapped around some enameled wire on the magnetic core and then encapsulated with epoxy resin or plastic. Its working frequency is 10KHz to 200MHz, and the inductance is generally between 0.1uH and 3300uH. The color code inductor is an inductor with a fixed inductance, and its inductance is marked with a color ring in the same way as the resistance. The unit is uH.
choke coil (choke)
The coil that restricts the passage of alternating current is called the choke ring, which is divided into high-frequency choke ring and low-frequency choke ring.
deflection coil
The deflection coil is the load of the output stage of the TV scanning circuit. The deflection coil requires: high deflection sensitivity, uniform magnetic field, high Q value, small size and low price.