I need to build some inductors for elliptic low pass audio filters. The values are near 0.004H and 0.007H. The output impedance is about
100ohms and the voltage level is about a volt or so. So in other words the current is in the area of 10mA. The parallel capacitance I have to put across the inductors is fairly high so that winding capacitance probably doesn't matter at all. I can use lots of turns.My options as I know them are a higher permiability power iron or a ferrite part. Would one material be superior to another? I've got some lower permiability ferrite cores and also some small gapped EE19 ferrite coresets with about 200nh/t^2. I also have some good sized #26 powder cores.
Project is for one homebrew audio filter for ham radio and will not be mass produced.
regards, NEO