Commonly used inductors: single layer coil, honeycomb coil, ferrite core and iron powder core coil, copper core coil, color code inductor, choke (choke), deflection coil.
Classified by inductance: fixed inductance, variable inductance.
Classified by winding structure: single layer coil, multilayer coil, honeycomb coil.
Classified according to the nature of the magnetizer: air core coil, ferrite coil, iron core coil, copper core coil.
Classified according to the nature of the work: antenna coil, oscillating coil, choke coil, trap coil, deflection yoke.
Inductor action characteristics: It often works with capacitors to form LC filters, LC oscillators, etc. In addition, people also use the characteristics of the inductor to manufacture the choke, transformer, relay, etc.; the characteristics of the inductor are exactly opposite to the characteristics of the capacitor, which has the characteristic of preventing the passage of alternating current and allowing direct current to pass.
There are many inductive coils on the radio, almost all of which are made of an air-wound coil wound around an enameled wire or wound on a skeleton core and a core. There are antenna coils (which are made of enameled wire wound on magnetic bars), intermediate frequency transformers (commonly known as mid-week), input and output transformers, and so on.