Please see the attachments as well. If one wants to test a single ferrite
toroid with no windings, I have a 1/4-inch rod that fits between the
alligator clips with the toroid in place.
[image: image.png]
[image: image.png]
Dave - W?LEV
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On Fri, Jul 1, 2022 at 10:41 PM Dave (NK7Z) <dave@...> wrote:
Anyone have a photo of their Ferrite text fixture?
73, and thanks,
Dave (NK7Z)
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 7/1/22 13:50, W0LEV wrote:
There is a tutorial which I have referred to in the past for such a
purpose
on the Fair-Rite www site.
Look under "Technical Resources" at the bottom of this folder. You will
find an excellent presentation there on how to determine what you have in
terms of ferrite cores. You can use the NANOVNA at the bottom end of its
frequency coverage to measure the inductance which you will need. What
is
required:
1) The dimensions of the core / toroid
2) The measured inductance with a known number of turns (it will guide
you
in this respect).
3) The number of turns on the toroid
4) The frequency of measurement (don't remember if this is necessary)
Then there is an applet you input these values into which comes up with
the
material. It's golden.
Dave - W?LEV
On Fri, Jul 1, 2022 at 6:46 PM <n4cla@...> wrote:
Good afternoon. I am not sure but I don't think I have seen this
mentioned as yet another tool for the NanoVNA. Can the Nano be used to
help identify anything about any of the cores that are sold by Amadon or
Fairite? I have many unidentified cores and would like to try to
identify
them as well as many others out there.
Thanks
Fred - n4cla
--
*Dave - W?LEV*
*Just Let Darwin Work*
--
Dave - W?LEV
