¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. Nanovna-Users
  2. Messages
Expanded Topics Messages
Date
Re: Why USB-C connector

 

USB4 uses the same connector and is backward compatible. It is essentially
a more open standard version of Thunderbolt 3, including that standard's
USB compatibility and use of the USB-C connector.

On Thu, Jan 16, 2020, 10:31 AM Kwacka via Groups.Io <kwacka2=
[email protected]> wrote:

Look on the bright side - USB4 is on the way! :(
Re: Why USB-C connector

 

I was a pretty early purchaser.

The cable that came with mine has always been flakey. It's now become completely unusable.

I finally went down to Target and bought a cheap replacement cable (I think it was less than $10) and the problem has completely disappeared...

M
Re: Re : NanoVNA-Saver Linux update procedure

 

On Thu, Jan 16, 2020 at 12:12 AM, Graeme Jury wrote:


Ahh this is turning out to be more tricky than I thought. I am using Linux
Mint 19.3 which uses python 3.6. It was no problem to load the dependencies
which I listed for python 3.6 but they would not work when I used them with
python 3.7 which although it looked in the right place for the dist-packages
it could not load them so I guess that there are significant changes.
Unfortunately I can't simply unload python 3.6 and upgrade to python 3.7 as
3.6 is integrated into too many Mint packages and is really a system file.
Hi Graeme

Sorry to hear that you cannot get nvna-s working on LM19.3. Same setup works fine here.



At what point does this install process fail? What are the error messages?

Nick
G3VNC
Re: Connectors on RF Test Board leads

 

Another problem with the demo board U.FL connectors is that they are surface mounted and unless you physically hold the connectors down while disconnecting cables can easily detach from the board. This happened to me while I was demonstrating the board at my ham club. Needless to say there were not many interested buyer's after seeing that. I also had to physically hold down the test cables during sweeps to maintain a good connection.

As other members have said, the demo board is a good concept but poorly implemented with the U.FL connectors. The demo board went into my bottom desk drawer with all the other Asian electronic devices that didn't live up to their billing. If I had seen reviews like the recent ones on this board before my purchase, I would have went with the sdr-kits demo board.

- Herb
Re: Connectors on RF Test Board leads

 

I concur with these statements though I have managed to get the connectors
mated but with some great effort and care.
*Clyde K. Spencer*

On Thu, Jan 16, 2020 at 10:20 AM Dick <w1ksz@...> wrote:

I bought one also and I cannot connect the cables either.

Nice concept, but if it doesn't work, what good is it.

Caveat Emptor

73, Dick, W1KSZ
________________________________
From: [email protected] <[email protected]> on behalf of
Christopher Pettitt via Groups.Io <g0eyo@...>
Sent: Thursday, January 16, 2020 7:11 AM
To: [email protected] <[email protected]>
Subject: [nanovna-users] Connectors on RF Test Board leads

I have just tried to use the RF Demo Test board I purchased with my
NanoVNA. I find it impossible to connect the leads supplied to the tiny
connectors on the test board. I assume I am not alone having discovered
this problem. The RF Demo Test board is a wonderful idea but not much use
if you can't connect to it.
Regards
Chris G0EYO
Re: Connectors on RF Test Board leads

 

You need a slit screw driver about 5 mm wide.
Hold with one hand the female connector of the cable centric over the male plug on the board,
and press with the other hand the female plug with the screw driver down, parallel with the board.
The first time you connect it needs some force, but the next connections are easier.

To open the connection use a 1 mm wide slit screw driver.
With one hand hold the cable at the connector down,
with the other hand lift with the screw driver the connecter at the crimping position up.

It works, but needs some learning.

To make U/FL cable female connector foolproof, solder the middle crimping,
see the picture at

73, Rudi DL5FA
Re: Connectors on RF Test Board leads

 

Just be aware that the connectors used on the board are not made for repeated connect/disconnect and will not stand up to repeated connect/disconnect. Cables need soldering to prevent breakage .
Re: Connectors on RF Test Board leads

[email protected]
 

Yes, those cheap U.FL plugs are a challenge to seat. I use SMA to U.FL adapters. Example is from Centric RF C9917B - Adapter U.FL/Plug S<A-Female (U.FL/AMC compatible) S Steel 6GHz VSWR 1.3 The adapters easily and reliably connect.
Regards,
John N9JSA
Re: Re : NanoVNA-Saver Linux update procedure

Pierre Martel
 

I have a question, from what I see. the problem seem to com from debian
flavored distro.

Anyone can report what version and linux distro they are using where
NanoVNA-saver works right away?

I am willing to change distro if it comes that that.

Pierre
VE2PF

Le jeu. 16 janv. 2020 ¨¤ 10:37, Nick <g3vnc@...> a ¨¦crit :

On Thu, Jan 16, 2020 at 08:26 AM, Rune Broberg wrote:

I'm a little confused as to the decision on the Linux Mint packagers to
release 19.3 late last year with Python 3.6, when 3.7 was already more
than
18 months old, and 3.8 had just been released as well. Going with a
version
that old is bound to cause problems for the users.
Yes, we might even have got a newer version of python-pip3 - see below.

Anyway, getting near to the bottom of this now. Following notes apply to
LM19.3.

As I understand it

$ python3.7 -m pip install .

parses ~/nanovna-saver/requirements.txt and installs the latest versions
of the required python distribution packages if they are not already
installed i.e.

scipy
pyqt5
pyserial
numpy

pip will always install the latest versions, not whatever (older) versions
happen to be available from the distro package management system - which is
good.

Since 15.12.19 when I installed nanovna-saver-0.2.2a there have been two
new versions of PyQt5...



The installation error reported arises when pip3 attempts to install
PyQt5==5.14.1. We are not alone...



The pip3 version provided with the distro package python3-pip appears to
be too old.

$ pip3 -V
pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)

Having read more about it seems that using sudo with pip3 to overcome the
error (as suggested in my earlier post #9634 and elsewhere) is a bad idea;
if you need to use sudo you are probably trying to modify a distro file.

There is no easy way to upgrade the version of pip3 supplied by the distro
package python3-pip. If the package manager advertises a new version then
you can install that as an update. It's a distro file and you shouldn't
try to upgrade it any other way. I managed to break (and fix) pip3 several
times in the attempt.

One way round this problem would be to install nanovna-saver in a python
virtual environment.

Another way is to modify ~/nanovna-saver/requirements.txt...

scipy
pyqt5==5.13.2
pyserial
numpy

then from ~/nanovna-saver/

$ python3.7 -m pip install -r ./requirements.txt .

This installs PyQt5==5.13.2 which is the version I used on 15.12.19.

I have tested this and it seems to work properly.

I do not understand why I had to explicitly specify the path to
requirements.txt though.

Nick
Re: Nano VNA

 

Slightly better specs.
Check the Wiki (link at bottom of every msg)

On Thursday, January 16, 2020, 10:52:09 a.m. GMT-5, SUNIL A R <sunilar85@...> wrote:

Hi friends , what is the difference between nano vna and nano vna -H....
Nano VNA

 

Hi friends , what is the difference between nano vna and nano vna -H....
Re: Re : NanoVNA-Saver Linux update procedure

 

On Thu, Jan 16, 2020 at 08:26 AM, Rune Broberg wrote:

I'm a little confused as to the decision on the Linux Mint packagers to
release 19.3 late last year with Python 3.6, when 3.7 was already more than
18 months old, and 3.8 had just been released as well. Going with a version
that old is bound to cause problems for the users.
Yes, we might even have got a newer version of python-pip3 - see below.

Anyway, getting near to the bottom of this now. Following notes apply to LM19.3.

As I understand it

$ python3.7 -m pip install .

parses ~/nanovna-saver/requirements.txt and installs the latest versions of the required python distribution packages if they are not already installed i.e.

scipy
pyqt5
pyserial
numpy

pip will always install the latest versions, not whatever (older) versions happen to be available from the distro package management system - which is good.

Since 15.12.19 when I installed nanovna-saver-0.2.2a there have been two new versions of PyQt5...



The installation error reported arises when pip3 attempts to install PyQt5==5.14.1. We are not alone...



The pip3 version provided with the distro package python3-pip appears to be too old.

$ pip3 -V
pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)

Having read more about it seems that using sudo with pip3 to overcome the error (as suggested in my earlier post #9634 and elsewhere) is a bad idea; if you need to use sudo you are probably trying to modify a distro file.

There is no easy way to upgrade the version of pip3 supplied by the distro package python3-pip. If the package manager advertises a new version then you can install that as an update. It's a distro file and you shouldn't try to upgrade it any other way. I managed to break (and fix) pip3 several times in the attempt.

One way round this problem would be to install nanovna-saver in a python virtual environment.

Another way is to modify ~/nanovna-saver/requirements.txt...

scipy
pyqt5==5.13.2
pyserial
numpy

then from ~/nanovna-saver/

$ python3.7 -m pip install -r ./requirements.txt .

This installs PyQt5==5.13.2 which is the version I used on 15.12.19.

I have tested this and it seems to work properly.

I do not understand why I had to explicitly specify the path to requirements.txt though.

Nick
Re: Why USB-C connector

Kwacka
 

Look on the bright side - USB4 is on the way! :(
Re: Connectors on RF Test Board leads

 

I bought one also and I cannot connect the cables either.

Nice concept, but if it doesn't work, what good is it.

Caveat Emptor

73, Dick, W1KSZ
________________________________
From: [email protected] <[email protected]> on behalf of Christopher Pettitt via Groups.Io <g0eyo@...>
Sent: Thursday, January 16, 2020 7:11 AM
To: [email protected] <[email protected]>
Subject: [nanovna-users] Connectors on RF Test Board leads

I have just tried to use the RF Demo Test board I purchased with my NanoVNA. I find it impossible to connect the leads supplied to the tiny connectors on the test board. I assume I am not alone having discovered this problem. The RF Demo Test board is a wonderful idea but not much use if you can't connect to it.
Regards
Chris G0EYO
Re: 3D printed nanoVNA-H BNC holder and binding post DUT holder

 

When you mate these 2 items, do you use a BNC barrel adapter?
Re: 3D printed nanoVNA-H BNC holder and binding post DUT holder

 

Herb
I do use it with the test rig connected by cables and calibrate using good calibration standards with data from SDR-KITS that I got with my FA-VA5.
Bob
Re: Why USB-C connector

 

It came with a C to C cable.
That cable might be defective..
Re: Installing NanoVna-Saver : First Time Problems/Fixes

 

Hello Leif,
NanoVNA-Saver does *not* use any image files in a zip-file - you must be
thinking about NanoVNASharp, or one of the varieties.

--
Rune / 5Q5R

On Thu, 16 Jan 2020 at 14:58, Leif M <sala.nimi@...> wrote:

I had this kind of problem when I started using Saver. The reason was
missing files. There are Smith chart images in the zip-files which are
needed.
Re: Why USB-C connector

 

I bought what was labeled in this group as the Huygen nanoVNA-H from the Alibaba store. Ordered December 21, 2019. It came with a C to C cable.
Connectors on RF Test Board leads

Christopher Pettitt
 

I have just tried to use the RF Demo Test board I purchased with my NanoVNA. I find it impossible to connect the leads supplied to the tiny connectors on the test board. I assume I am not alone having discovered this problem. The RF Demo Test board is a wonderful idea but not much use if you can't connect to it.
Regards
Chris G0EYO
30081 - 30100 of 39686