Powdered iron cores are all color coded. In general, ferrite material is
not color coded, although some suppliers may.
Dave - W?LEV
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On Sat, Mar 11, 2023 at 11:24?PM N2MS <mstangelo@...> wrote:
Bryan,
Those power supply ferrites are useful for low frequency power or choke
applications but are not that useful for HF balun, unun or transformer
applications. The unknown ferrites I find useful are those split ferrites
placed on cables for RFI attenuation. Most are designed for VHF attenuation
and are similar to the Fair-Rite 43 mix.
There is no standard color code. The colors are probably unique to the
manufacturer.
Mike N2MS
On 03/11/2023 4:25 PM Bryan Curl <bc3910@...> wrote:
Thanks all. I just wasnt sure, for a thru cal where to place the Open
Short and Load bits. Its pretty straight forward for using just S11 for
reflected measurements.
Mike that's a great idea for identifying ferrites! I tore some out of an
old PC power supply that were green, blue and black but have no idea what
they are. Colors may or may not be an indication.
Thanks again everyone.
Bryan
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*Dave - W?LEV*
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Dave - W?LEV
