W1HIS talks about how to identify ferrites in appendix 1 of this doc:
http://www.yccc.org/Articles/W1HIS/CommonModeChokesW1HIS2006Apr06.pdf
-Sean WA1TE
On Wed, May 31, 2017 at 9:51 PM Michael Walker <va3mw@xxxxxxxxxxxxxx> wrote:
> This group is clearly one of the most technical groups around and if this
> off topic enough, please kill it.
>
> The question is that if you have a box of ferrites with no labels on them,
> how could you measure their ability to be used as a choke. Yes, you could
> measure them and look them up assuming they came from one vendor.
>
> You have the usual ham tools plus a spectrum analyzer with a tracking
> generator.
>
> Does anyone have a tried and true method for determining what their choking
> impedance might be?
>
> Mike va3mw
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