One-layer inductance coil calculator
If you need to make home-brew inductance coil for the matching circuit, for an amplifier, for magic crystal radio etc, you have some question:
- how many turns are in the coil?
- what is the diameter and length of the winding?
- which wire to use?
You have to choose the winding design empirically, guided by the following general tips. Most of online calculators enable to find inductance of the coil knowing its winding dimensions and number of turns. This calculator help for you to estimate the number of turns of your home-brew one-layer R.F. inductor or choke on the design stage. The calculator uses Bob Weaver's equation with round wire corrections. The Coil32 for Android and the cross-platform Coil64 makes it possible to calculate the self-capacitance and Q-factor of the single-layer coil.
Calculate number of turns
| Select units: |
ENTER THE INPUT DATA:
| L | = | – Required inductance | |
| D | = | – Diameter of coil-former | |
| d | = | – Diameter of wire without insulation | AWG |
| k | = | – Diameter of wire with insulation | Automatic |
| N | = | – number of turns |
| l | = | – Length of winding |
Calculate inductance
ENTER THE INPUT DATA:| N | = | – Number of turns |
| D | = | – Diameter of coil-former |
| l | = | – Length of winding |
| L | = | – Inductance |
Coil64 also estimates Q-factor and self-capacity of the single-layer RF coil.
Below you can see the references to best online calculators by my opinion, that enable to find inductance of the ready-made inductor.
References:
- Single-layer Coil Inductance calculator by IN3OTD
- RF Inductance Calculator by ON4AA
- Round Coil Inductance Calculator by R.Weaver
Thanks for all the work, and especially for the explanations of parameters that most of us never understood.
It was very useful, and an education as well.
John K.
the table keeps looking for inductance
?