What does ''inductance measured at 100kHz'' written in the data sheets of coupled inductors mean? Is it that the inductor can be operated at 100kHz only? - Quora
Solenoid Coil Parameters – Their Effects and Measurement (Resistance, Inductance, Reactance, Impedance, & Turns Count) - Electricsolenoidvalves.com
Coil32 - Multilayer air core inductor on a rectangular form