Does anyone know of a method of measuring the characteristics
(permeability) of ferrite cores? I have a box of these most without any
identification although I do have T200, 68-2T and T68-2s whose
characteristics are known.
It occurs to me that you can make a tuned circuit and measure resonance
with a GDO when a ferrite core is inserted into the inductance. A graph
could be made of the different resonances with different cores, to
extrapolate the unknowns.
However I think that ferrite bulk might be a problem. For example I
guess the red T cores use the same material but would there be a
difference between the T200 and the T68?
I have lots of material about ferrites in general - I just want to know
what I have in my junk box. I am not interested in exact measurements, I
just want to know if a core is suitable for a specific job.
Regards
Peter, G3LDO
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