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I finally got Norton to prompt me and I restored it. Thanks for the program.

Mike N2MS

You’re welcome Kurt and big Thanks also to all who liked the software.

Kind regards,

neb

Hi Mike,

Norton is agressive, Eset NOD32 is work well but not víruses.
This program work well, without problem.
Thank You neb!

73, Gyula HA3HZ

Hi Neb
Works great, I like your approach to user interface very much
Thank you for the new version
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af neb40gsm via Groups.Io
Sendt: 21. december 2019 09:54
Til: [email protected]
Emne: Re: [nanovna-users] nanoVNA Partner #nanovna_partner

nanoVNA Partner v 0.19

- Max and Min points unit of values displayed fixed;
- Main chart size can now be horizontally increased;
- Added Q-Factor on the main chart;
- Added separate Cal Reset button on its calibration procedure menu;
- Minor grid in all of its charts are enabled;
- And added Recall ID display to be able to monitor what calibration memory is being used.

If interested, download it from here:

Kind regards,

neb

My Norton also deleted it and I cannot restore.

Mike N2MS

When I download NanaVNA-Webapp-nightly-e20d9ae.apk from the Github.com/cho45 on my 4 month old Amazon Fire 10. using web browser "Silk" I click on the .apk and get a popup, "Do you Want to Download" I click, "OK" it gives me another popup "Done do you want to open? I click on OPEN and I get "PARSE ERROR - There was a problem parsing the package."
I downloaded the package x2 times. I also tried AKP INSTALLER app I had downloaded and used a number of times.. Same issue. Same error.

Second ITEM.. I have performed the "GOOGLE PLAY install to my Fire" at least 2 months ago, used it a number of times. No problem.. A number of posts talk about downloading "NanoVNA" from GOOGLE PLAY and it will run on the FIRE... When I go to GOOGLE PLAY I do not find any app named "NanoVNA" but find one named BLUE VNA.. and others like Metro VNA by the same author... What is very interesting is I just logged into google play using this Windoze 7 machine and I can find NanoVNA by cho45 just fine. Apparently the issue is on the FIRE. Blue VNA is written by DAn Toma- I can search on either and get it, but NanoVNA or cho45 brings me nothing.. Finally - On my Motorola moto e* plus... NanoVNA by cho45 is 1st on the list...humm.... moto e* is android 8.0.0 the Fire is Fire OS 5.6.4.0... all I can find regarding it's OS.. it was an "on sale" and a lot faster than my 4 yo Samsung.

Merry Christmas..

Consider this post NO COMPLAINT but rather REPORT OF FINDINGS...

#88 : the G formula - our research work has been completed

Hello,

Allow us, please, to present the complete G formula - in our sow and
facupov, of course - at:



in terms of its measurement g, as well as of S, L, O loads given
by their honest manufacturers as (Nominal Value, Uncertainty)
couples, and their measurements s, l, o respectively - all complex.

By the way, also allow us, please, to announce -with much pleasure,
indeed- that our related research work in this very subject
-
that is on the assumption that the VNA measurement g caused by a
connected to VNA load G can be considered as obeying the equations
of an irreversible, non-reciprocal, two-port - a virtual-real one consisting
of a virtual measurement port and a real load port - along of course with
their errors caused by the inaccuracies of these measurements and the
uncertainties of these loads
-
has been substantially completed, since in our Small Objective World
sow we can not see anymore any further existing omissions in this picture
facupov From A Common User's Point Of View.

Sincerely,

gin&pez@arg

:88#

Jos,

Try or
contact me through email.

Kind regards,

neb

FYI, a (new) digital version of QEX will be available to all ARRL members starting early next year. If you want the print version, you’ll need to subscribe.

Mark W8EWH

Hi

Both addresses give message from Norton " Dangerous Webpage"

Sorry

Jos

Op 21-12-2019 om 09:49 schreef neb40gsm via Groups.Io:

Yeah, the original Nano (and mini/pocket VNA, plus most old HP gear) are like that. It's possible to remove the drift (and I mean not having to re-calibrate after warmup) with an internal correction switch (basically a switch that shorts port 1 to ground) which I've added in my design; hopefully others will follow.

The difference is, that after warmup one gets repeatable results. When I calibrated the cold VNA and started to measure, maybe the very first results showed true numbers, but very soon results drifted (see the figure to my initial posting). I feel much better when repeated measurement show the same number. Otherwise there is always a bad taste...

Chris

nanoVNA Partner v 0.19

- Max and Min points unit of values displayed fixed;
- Main chart size can now be horizontally increased;
- Added Q-Factor on the main chart;
- Added separate Cal Reset button on its calibration procedure menu;
- Minor grid in all of its charts are enabled;
- And added Recall ID display to be able to monitor what calibration memory is being used.

If interested, download it from here:

Kind regards,

neb

Look in the source code of nanoVNA-saver on github

Or if you only require perfect calibration standards use this:


plusJ=complex(0,1);
minJ=complex(0,-1);
one=complex(1,0);
two=complex(2,0);


gm1 = S; #Measured Short
gm2 = O; #Measured Open
gm3 = L; #Measured Load
s21m = T; #Measured Through


g1=complex(-1,0)

g2=complex(1,0);

g3=complex(0,0);

denominator = g1.*(g2 .- g3).*gm1;
denominator = denominator .+ g2.*g3.*gm2 .- g2.*g3.*gm3 .- (g2.*gm2 .- g3.*gm3).*g1;
e00 = - ((g2.*gm3 .- g3.*gm3).*g1.*gm2 .- (g2.*g3.*gm2 .- g2.*g3.*gm3 .- (g3.*gm2 .- g2.*gm3).*g1).*gm1) ./ denominator;
e11 = ((g2.-g3).*gm1.-g1.*(gm2.-gm3).+g3.*gm2.-g2.*gm3) ./ denominator;
deltaE = - ((g1.*(gm2.-gm3).-g2.*gm2.+g3.*gm3).*gm1.+(g2.*gm3.-g3.*gm3).*gm2) ./ denominator;

e10e32 = s21m .* (one - (e11.*e11));

ed = e00;
es = e11;
et = deltaE;

th = e10e32;



--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

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
--
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.

-----------------
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