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Hello
I'm just completing a nice project in Python to Autotune a Magnetic Loop antenna using this great NanoVNA.
So far, so good, but now I would like to include a calibration procedure so as to be applied on imported raw data.
Could someone help me to understand how I get a "calibrated" S11 value for a given frequency for which I have the "measured", "load", "open", and "short" values.
Many thanks in advance!
Daniel

In the miniVNA (VNA / J) software there is a thermometer.
The green light only occurs above 45 °. I missed this information on nanoVNA.

/g/nanovna-users/message/3872
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Regards,

Martin - G8JNJ

Please don't keep us in suspense! What are the make and part number for these
buttons?

Dana

First item, NVIS:
Near impossible with a vertical. Not going to happen above about 5mhz under
current solar conditions. Suitable antenna would be a dipole for 80/75M low to
the ground. Low in this case is just high enough to keep people from touching it.
I run mine at about 10ft, very good for local contacts out to maybe 500 to
600 miles not DX. A friend uses magnet wire on the top of a wood fence.

Vertical likely for bands higher than about 30M the takeoff angle will be high
and higher because the antenna being too long. For below 30M it should
have a fairly low takeoff angle if fed against a good ground or radials.
For 10M the bulk of radiation is mostly up and through the ionosphere.

If you measure it with a VNA you will see wile excursions in feed point impedance
mostly low. Its a non resonant antenna fr most ham bands. The likely impedance
is the antenna plus the ground loss and with a poor ground expect a fair amount
being loss to ground resistance (varies with quality of ground and radials).

FYI-- RULE 3: any antenna is better than a bucket or wire in the shed.

They all work at least some.

My best contact on 40m was with a dipole at 2" (yes inches) height over 1300
miles and 10W. I forgot it was not up yet and heard the station on the radio
so I called. I give it two inches as they lawn had just been mowed.

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I do not accept private email due to forum scraping groups.io

Gabriel,
I think it would be advantageous to at least place the solder pads for an SD TF card slot as I had on my original white Gecko board.

Just leave them unpopulated for now and when the firmware has become more mature and has update via SD ability (like the NanoVNA-F), folks can add the slot.
See my photos:?

Unpopulated TF pads:? /g/nanovna-users/photo/0/0?p=Created,,,20,1,0,0
Added card slot from old cellphone:? /g/nanovna-users/photo/0/43?p=Created,,,20,1,40,0
As for a new name, how about i-VNA or E-VNA or VNA-3G?? Everything these days has the letter 'i' in front of the name.....;-)
Regards,Larry

I replaced the jog switch with 3 edge mount through-hole pushbuttons. Any more suggestions (minor changes) before I submit the design for one more round of prototyping?

I am not the owner of the "nanovna" account on GitHub. To be clear, I'm at OwOComm which is a design contractor and does *not* market and sell NanoVNA devices. We are only responsible for the hardware design work which is why the repositories aren't on the OwOComm or my GitHub. I can answer technical and engineering questions only. Because the design will be open sourced we expect many independent manufacturers to be producing these at some point, and what they name it is beyond my control. In fact, the internal name of this project is "S-A-A" for Simple Antenna Analyzer. In a requirements discussion the customer described it to be an "improved NanoVNA, or V2", and the name has stuck thereafter. Since this is the name that all end users on the internet now recognize, I expect that the manufacturer and distributors will run with this name and there is nothing I can do about it. Sorry.

No, UltraVNA should be a full two-port, > 6 GHz analyzer, >120 dB S21 (and S12) at least.
I want to build one, if I only had time...

Reinier

Op 20-12-2019 om 16:32 schreef Larry Rothman:

How about the name: UltraVNA ??

On Fri, Dec 20, 2019 at 11:40 AM, Gabriel Tenma White wrote:

I've brought this issue to the team. It's going to be NanoVNA-B V2, if you
don't object. I'm only an engineer on the development team (for OwOComm) and
my name comes from a fictitious character who has no relation to this project
;)

I did not intend to speak, but I ask: Your conscience is fine, can you sleep soundly? Doesn't it bother you steal your other intellectual product?
“I'm just an engineer on the OwoComm development team.”
However, you have expropriated the nanovna name on github too.
However, the original "nanovna" is the copyright that you are asking to change your name.
If until now it was not clear.
Bravo. A successful horse must be ridden. In any way?

Regards, Gyula

ann : next-to-come : a practical introduction to errors of "errors"

I'd also like to suggest being able to rotate the screen so that the SMA's and cables are not facing the user.

However having removed the jog wheel and converted my Nano to use small push buttons (see attached) with a positive tactile 'click', I definitely wouldn't recommend fitting a jog wheel in any way, shape or form.

Regards,

Martin - G8JNJ

@Gary O'Neil, N3GO : 20 December 2019
/g/nanovna-users/message/8429

Dear Gary,

Thank you, very much indeed, because you noticed this !

Well, in our sow this means :

"keep the signal flow diagrams, use them to correctly express the
relations between a-s and b-s at joining ports, and forget the -most
disorientating- "rules" of them".

And we used it in this way for more than 25 years until last January
2019, when we found -with much pleasure, indeed- its full independent
justification at:

D. M. Kerns and R. W. Beatty, "Basic Theory of Wave guide Junctions and
Introductory Microwave Network Analysis" [*], Part 2, Introductory Microwave
Network Analysis, 2.18 Signal Flow Graph Applied to the Scattering Equations
pp.123-124, International Series of Monographs in Electromagnetic Waves,
Editors: A. L. Cullen, V. A. Fock J. R. Wait, Volume 13, Pergamon Press Inc,
First Edition, 1967:

"(f) Comments on use of signal ?ow graphs

This technique offers nothing fundamentally new and, if correctly applied, yields
the same results one would obtain by solutions of the scattering equations.
It seems to be simpler in some eases to write down the solutions by inspection of
diagrams rather than by algebraic manipulations. However, one must he careful
not to miss any of the loops, and this is a possible source of difficulty, especially
when we are dealing with 3-ports, 4-ports, or more complicated networks.

As a graphical aid to intuitive thinking about the analysis of systems, it is no doubt
valuable, and is therefore a tool to supplement conventional algebraic analysis."

Best regards,

gin&pez@arg

[*] 16 November 2019 : /g/nanovna-users/message/7092

I think that NanoVNA-B is okay.
You should not use V2 in its name. I would like to emphasize this again.
I hope that your team accepts this proposal.
Regards,

GIN&PEZ;

Thank you for this very nice resource archive.

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73

Gary, N3GO

I've brought this issue to the team. It's going to be NanoVNA-B V2, if you don't object. I'm only an engineer on the development team (for OwOComm) and my name comes from a fictitious character who has no relation to this project ;)

Hi Gabriel,

Congrats to see working your product.

As I posted in the former message, I think that you should use a name such as V2 or Pro.
I propose that your product should be named as NanoVNA-G derived from your initial.

Again, I strongly say that you should use the name of V2.
I hope you think this issue seriously.
Regards,

@edy555

Good morning GIN&PEZ;

I am confused by your comment of number 4 being redundant. I am OK with the remainder.
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73

Gary, N3GO

On Fri, Dec 20, 2019 at 02:19 AM, hwalker wrote:

Jan-Feb 2020 Issue of the ARRL QEX magazine
seems a pity it could not be posted for non members to read,looks like an interesting read.

/g/nanovna-users/message/2148 Thats you are!
I encouraging&cheering for your contribution