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All,

Please join us in welcoming Dave Eckhardt, W0LEV, to the role of co-owner of the nanovna-users group. Most of you have probably seen his posts to the group. He is well-versed in the use of VNAs and is very knowledgeable in the areas of electromagnetic fields, antennas, EM field measurements, just to name a few.

Dave Feldman
Dave Daniel
(co-owners)

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On Wed, Feb 1, 2023 at 11:28 AM, Lou W7HV wrote:

get some experience/practice working with the U.FL Connectors

Get. The. Proper. Tool.
If they make an insertion/extraction tool it is because it is needed to avoid damaging the delicate connectors on the cable or, worse, tearing loose the mating connector on the board.
My father, a tool-and-die maker, told me that if you need a tool for your work and do not buy it, you will pay for it and still not have it.
73, Don N2VGU

It looks like you may have a math library issue, maybe indirectly through
some other computation library used. Seems like it may be using more
significant digits, or not rounding in the same manner, making the axis
labels annoying.

One of the main reasons I got a demo board was to get some experience/practice working with the U.FL Connectors. My most recent radio has a lot of them and figured it's better to practice on something small and cheap.

On 01/02/2023 14:41, Richard Spohn wrote:

Hello. I decided to put my NanoVNA in a safe place so I wouldn't scratch it or damage it. Now... ...I can't find it.
This may be a sign from the Supreme Diety that i should buy the "DeepVNA" 4.3 screen with the aluminum enclosure. Does anyone have recommendations as to the best store/place to buy one? I recall R&L are selling them, is that a reputable dealer? Thanks for all the leads in advance!
== Rich WB2GXM

Rich,

This is the maker's store:



I hear good reports of R&L.

Cheers,
David
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SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Try this. There is a link to purchase directly from the vendor.


*Clyde K. Spencer*

Hello. I decided to put my NanoVNA in a safe place so I wouldn't scratch it or damage it. Now... ...I can't find it.

This may be a sign from the Supreme Diety that i should buy the "DeepVNA" 4.3 screen with the aluminum enclosure. Does anyone have recommendations as to the best store/place to buy one? I recall R&L are selling them, is that a reputable dealer? Thanks for all the leads in advance!

== Rich WB2GXM

I don't care about the accuracy, it just looks untidy.

The noisy trace is a bigger problem.

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Mike

On Wed, Feb 1, 2023 at 11:51 AM, PDXer wrote:

How do you find it yourself?

Hello,
you can find some application information here:
/g/nanovna-users/wiki/16592

Most important is the handling of the small RF connectors U.FL/IPX.

73, Rudi DL5FA

The kit can be used to familiarize a new user with the shape of the VNA's responses to various types of circuit elements but is not too useful otherwise.
The IPEX connectors were designed for one-and-done use and will wear (or break) quickly with repeated mating/demating cycles. Getting the connectors unmated can also be tricky without the special little tool.
Having used VNAs since the '80s, I wouldn't buy it myself but for a newcomer it may have some value as a learning tool.
73, Don N2VGU

OMG not 0.0001db LOW !!! Who cares when the accuracy of most attenuators is 1%? (0.01db on a 10db attenuator)

Hi pdxer

I have bare boards if interested !



73's
Jason 9H5BM

Please note this is about NanoVNA-App NOT NanoVNA-Saver!

I've got it to run successfully on a Pi4 with the Twister OS (if anyone's interested I'll tell you how) but it has a couple of issues which limit its usefulness.

The trace is noisy and the amplitude scale reads 0.0001dB low (see attachment).

Unless anyone has any idea how to fix this I'll reluctantly have to revert to using Windows.

--
Mike

it will work with any item that uses sma connectors.
It is a basic educational tool - good fun to learn with.
The durability of the connectors is time - limited , but you should have got bored with it before they give up.
Practical use - well you could use it for S.O.L.T , but swapping those connectors might get onerous.!
Just get one - play, learn, & have fun..

I see RE Demo Kit for NanoVNA-F for demonstration. Would it also work for the H4?
Is this a good kit for NanoVNA beginners for learning?
Does it have any practical use than educational?

I also read a lot of complaints about the kit.
How do you find it yourself?

Here is a link to a post I made earlier with download links for WIN 7 drivers and a version of NanoVNA Saver which runs on WIN 7.

/g/nanovna-users/message/29523

Roger

Chris,
I can't help you any more with the NanoVNA App running under Android.
But if you are interested in the topic, you can use the 32-bit version of the NanoVNA-App running under Windows on Linux OS with Wine.
You can run it on a Raspberry Pi (4B), which is where I tried.
You need to install Twister OS v2.1.2 on the microSD card.
The files required to run the OS and Wine are already installed on it.
First you need to start Wine Config, then it will install two programs.
When finished, select the OS you want to emulate in the Config window. By default, Windows 7.
Then copy NanoVNA-App-1.1.211.exe into the Documentation folder.
After starting Wine, select it in the file manager window and run it.
You can see how the program will log in on the attached link.:
Use the NanoVNA with the latest firmware, the NanoVNA-App is updated for this. (v1.2.x)

--
Gyula HA3HZ ( )

On Tue, Jan 31, 2023 at 10:35 AM, Ho-Ro wrote:

You need also an udev rule that allows user access to the USB serial port of
NanoVNA and tinySA.
This is currently not part of the package - just use this one and install it
into /etc/udev/rules.d:

Correction - normally an udev rule is not required for operation via the USB serial port - it is sufficient to be in the group "dialout" - should be the case for Ubuntu, you can check with the command "groups".

But nevertheless this udev rule above can be helpful, because it creates a symlink "/dev/nanovna" that points to the USB serial port where the NanoVNA is connected, regardless of the port name (either ttyACM0 or ttyACM1,...), and "/dev/tinysa" for the tinySA. If you have both devices connected to your system, these links are always correct, no need to check where the nano and the tiny are connected.

content of 60-nano-tiny.rules:

#
# create constant symlinks for NanoVNA and tinySA devices
#

ACTION=="add", SUBSYSTEM=="tty", \
ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", \
ATTRS{manufacturer}=="nanovna.com", \
SYMLINK+="nanovna"

ACTION=="add", SUBSYSTEM=="tty", \
ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", \
ATTRS{manufacturer}=="tinysa.org", \
SYMLINK+="tinysa"

On Tue, Jan 31, 2023 at 12:44 AM, Donald S Brant Jr wrote:

There is one particular use case where no calibration is needed at all, and
that is when tuning a magnetic loop or similar antenna, where the only
adjustment is resonant frequency. The S11 VSWR/log mag dip will be at the
same frequency regardless of calibration status.
73, Don N2VGU

Good point as well.