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HiCan you plese advise the whole procedure and test fixture to identify and characterise unknown ferrite cores with nanovna? ?73 de YO4AUL?

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Pe vin., nov. 15, 2019 la 0:06, David F4HTQ<f4htq@...> a scris: Hi All,
I? add some explanations.
I asked Rune if he could add this graphic because it is very useful.
It display curves that have exactly the same shape as the complex permitivity curves (μ'r and μ''r) of the ferrite datasheets.

The values do not match those of the constructor curve ( to have the right value the software might know the exact geometry of the inductor) , but the shape is absolutely identical.

This allow to easy? identify unknown ferrite core, and to better understand how to use it in a RF device.

For example, here is the true curve of material 43 of Fair rite.



And here's the one I got with NanoVNASaver



It works really well.
David, F4HTQ.