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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

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

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.

On 1/15/20 11:02 AM, Alberto I2PHD wrote:

Unfortunately apt-get does not know any of those....
I tried installing PyQt5, numpy, scipy and pyserial, but apt-get

declared those as unknown packages...

Probably they are part of a bigger package, but here I need the

advice of a Linux expert...


???? apt-get probably won't find them unless you use the exact name.?
Synaptic, on the other hand, probably will.? Is Synaptic available in
your distro?