I have a few ferrite cores from old monitor deflection coils and I'm looking to reuse them as inductor cores for power supply circuits.
How would I go about characterizing them? One thing I did was to wind 7 or so turns on one of the cores, connect it in parallel with a capacitor, and use a pulse to excite it, at which point the resonant frequency (and thus the inductance) can be measured. It measured about 29uH. But that only tells a part of the story. Is there an easy way to figure out how many A*N (amp*turns) the core can withstand without saturating?