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Usinf the NanoVNA-H4 to identify ferrite cores

 

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
 

We can analyze the characteristics of the ferrites in the drawers with a nanoVNA device and a nanoVNA-Saver program.
These "curves" should then be compared with the curves given by the manufacturers.

You can see such curves, e.g. here:

The first ferrite measurements with the nanoVNA were discussed by forum members here: /g/nanovna-users/message/6996 and in subsequent discussions. (/g/nanovna-users/topic/nanovna_saver_0_2_0/54247421?p=Created,,,20,1,20,0&jump=1)
NanoVNA Sorts Unknown Ferrite Suppression Beads

So whoever is interested in the topic can do it. nanoVNA-Saver -> Display setup -> S11 with R/¦Ø & X/¦Ø (?¦¸/Hz) selection.

--
Gyula HA3HZ ( )
 

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
 

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
 

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

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

image.png
image.png
IMG_3380.JPG
IMG_3383.JPG

 

Read this one.

I've gone the path :-)



73

Arie PA3A


Op 1-7-2022 om 20:46 schreef n4cla@...:

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

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