The coil of inductance is the conductor curtailed into a spiral reserving magnetic energy in the form of magnetic field. Without this element it is impossible to construct neither the radio transmitter, nor the radio receiver, on the equipment of wire communication. And the TV to which many of us so got used without coil of inductance is inconceivable.
It is required to you
- Wires of various section, paper, glue, plastic cylinder, knife, scissors
Instruction
1. coils inductance basis – the conductor. Around the conductor with the current passing through it there is always a magnetic field. Force of this field depends at most current in the conductor. One more way to increase magnetic field is to curtail the conductor into a spiral. It also is not that other as the inductance coil. The diameter of the coil, the more in it is less than rounds, the magnetic field created by the coil is stronger. Radio fans usually reel up such coils independently.
2. Inductance call ability of the coil to create magnetic field. The inductance is measured in henry (Gn).
3. Coils of inductance do not release in the form of standard details with standard characteristics, and count and produce for each concrete device separately. Therefore at production of the coil you will need to consider first of all characteristics of entrance and output signals of your radio set.
4. For ultrashort-wave and short-wave oscillatory contours produce coils with a small number of rounds and a thick wire. Some of such coils have no framework.
5. To reception and transfer of radio signals on average and long waves use mnogovitkovy coils (single-layer and multilayered). Paper or plastic will be necessary for you for production of a framework for such coils.
6. The number of rounds of the coil at setup of radio receivers and other equipment should be selected experimentally, changing at the same time inductance of the coil. It is possible to make it an otmatyvaniye and a domatyvaniye of rounds of the coil, but such way is not quite convenient in practice. Most often in the coil place the sliding core from special magnetic materials. It can be an alsifer (alloy of aluminum, iron and silicon).
7. Magnetic cores concentrate magnetic field of the coil, than increase its inductance. At the same time you can reduce quantity of rounds of the coil that attracts reduction of its sizes and dimensions of the radio device.