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
RF Inductance Calculator for Single‑Layer Helical Round‑Wire Coils
Inductance of Air Core Inductor Calculator
Single-Layer Coil Inductance Calculator • Electrical, RF and Electronics Calculators • Online Unit Converters