So Im trying to figure out the inductance of the primary of my flyback transformer so that i can calculate its current draw at certain frequencies. Im having trouble doing this. I seem to always get values that are way off the charts when it comes to inductance. does anyone know how to figure out the inductance of this coil on the flyback. there are seven turns of solid wire on the ferrite core which is about 1.1cm by 1.5cm. (its not round its a square core) length of the coil is about 2.5 cm. does anyone know what the inductance of this coil could be. with out measuring it??. I have attached a picture.