That would be permeability. Physics degree not withstanding. I never
could keep them straight!
Dave - W?LEV
On Thu, Nov 14, 2019 at 11:55 PM David Eckhardt via Groups.Io <davearea51a=
[email protected]> wrote:
Yes, what was your setup for the type 43 material permittivity measurement?
Dave - W?LEV
On Thu, Nov 14, 2019 at 10:32 PM Bob Albert via Groups.Io <bob91343=
[email protected]> wrote:
David, can you explain exactly how you got the curves? I would like to
do it also.
Bob
On Thursday, November 14, 2019, 02:06:06 PM PST, David F4HTQ <
f4htq@...> wrote:
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 (¦Ì'r and ¦Ì''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.
-----Message d'origine-----
De : [email protected] [mailto:[email protected]] De la part
de Rune Broberg
Envoy¨¦ : mercredi 13 novembre 2019 08:23
? : [email protected]
Objet : Re: [nanovna-users] NanoVNA-Saver 0.2.0
Hi John,
my experiments in this field have been very limited - the feature was
added with the encouragement of David F4HTQ. He submitted to me an S2P
file
of a measurement of a toroid, and a curve shape:
He believed this could be approximated as R/¦Ø and X/¦Ø, so I implemented
it, and managed to create the following graph:
[image: image.png]
Which seemed to fit quite well, even though the units aren't exactly the
same.
So, for now, all I know how to do is: Given a permeability chart from a
manufacturer, replicate the same curve shape vs frequency using the
NanoVNA.
I hope it's useful ;-)
--
Rune / 5Q5R
On Wed, 13 Nov 2019 at 01:22, John AE5X <ae5x@...> wrote:
Now that the capability is there in the software, how would one use
the NanoVNA to check a toroid's permeability? New territory for me...
:-)
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
