        1. The cores are made with ready-gaps.
A number of ready-made gaps can be found in the manufacturer's documentation (datasheet).
The gap should be selected from a standard range of values for this core.
If it is impossible to purchase the core with the desired finished gap, it is possible to make a gap with spacers.

        2. The program specifies the full value of the gap.
The gap made with the thickness of the gasket will have approximately half the required gap size. The effective length of the gap is shorter than the geometric length of the gap of the magnetic field due to bulging in the gap.
Therefore, it is desirable to choose thickness of spacers on the meter inductance until the calculated value of the primary inductance is available.

        3. I suggest to let the program calculate the diameters of the wires and the number of the wires in the windings first to make the best of a given diameter.

        4. To add a new core to the database, you have to enter a name.
    There is no need to manually add a prefix about it's form, the program does it automatically.

        5. When adding a new core to the database, it is better to use the checkbox "Add to database (input data)". Please take the parameters from the manufacturer's documentation.
    The symbols mean the following parameters:
	Ae - Effective cross section area, mm2
	An - Area of the core window, mm2
	le - Length of the magnetic path, mm
	Ve - Volume of the core, cm3
    In case the manufacturer's documentation misses the window area of the bobbin for the winding, calculate the area of the window yourself.
    The volume of the core is calculated by the program. Core volume is the product of cross-sectional area of the core and the length of the average magnetic line.

        6. If "Other" is chosen as the form of the core, please take the parameters from the manufacturer's documentation.
