Calculator for Short Wave (SW) Radio Coil

This calculator will find the inductance value of the short wave (SW) radio coil required for building a ferrite rod antenna given the value of the variable capacitor. The default values are for the coverage of the SW frequency range of 1700 kHz to 30000 kHz, utilising a 224 pF variable capacitor. This article is for people who have an inductance meter, so that they can measure the value of the coil as they are winding it. The size and type of ferrite rod used and the gauge of the coil is very much up to you, however the most important part is to get the inductance correct.

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