Hello everyone, I am trying to make a coil with the exact specs as the original. I have all the info I need except the actual core material used. I have all the measurements of the core and coil including: Wire gauge, # of turns and turns per layer,Bobbin dimensions, inductance without the core, inductance with the core, operating frequency range etc. I believe the core material is ferrite with a permeability of around 1,000 but I'm not exactly sure. How can I determine the permeability of the core I need?