The fact that practically everyone else was able to figure it out
should give you a pause.
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On Thu, 1 Jun 2023 at 17:55, Anne Ranch <anneranch2442@...> wrote: Wrong - the reality is - when I try "update" I get "connection failed" .
So obviously it is my fault that I cannot even connect to git - using my
current release.
The less obvious question is - what kind of software is ANY published /
public software when it cannot "connect" to run update?
End of story - any guesses why I cannot "connect" is therefore
immaterial.
.
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On Thu, Jun 1, 2023 at 06:43 PM, Ho-Ro wrote:
connection error due to changed URLs
See my bug report at github:
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On Wed, May 31, 2023 at 07:25 PM, Dragan Milivojevic wrote:
NanoVNA Saver is regularly updated
Currently there's a big code restructuring going on for the upcoming version 0.6 that switches from Qt5 to Qt6. If you're using the latest stable release 0.5.5 then the check for updates from the "About" window gives a connection error due to changed URLs (the version check looks directly into the github source code of module About.py). So if someone else encounters this kind of error, do not freak out but go to github and check for a new release :)
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Hello Sigi, we have not talked for a while. Hope all is well with you .
I am currently using QT as a development tool , but have another project I need to finish first before I check another C/C++ development tool.
I recall that "saver" had few issues when I started with VNA, probably 4 years ago ....
I am not going to spent my time trying to find why it currently ignores "sweep" setting - at times....
My is an old version to boot...
It actually got me interested in Python, but I dropped it very quickly - my choice....
You stay well
73 und 55 Vaclav AA7EJ,
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¡° The less obvious question is - what kind of software is ANY published / public software when it cannot "connect" to run update?¡±
An opensource software no more maintained by the original author¡
But for this other part:
¡° But I realized LONG time ago that the software is no longer actively updated etc.
Hence this is non fixable issue...¡±
Is just wrong because, other authors have proposed new versions of the software. And even if there wasn¡¯t new authors, It is open source so you could eventually fixe it yourself.
But personably, I have crash issue with nanovnasaver and I have some doubts on the measurement (I am not sure of what is done) so I prefer other software. But you can¡¯t say, Nanovnasaver is not still active.
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Unbelievable.
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On Thu, 1 Jun 2023, 16:54 Anne Ranch, <anneranch2442@...> wrote: Wrong - the reality is - when I try "update" I get "connection failed" .
So obviously it is my fault that I cannot even connect to git - using my
current release.
The less obvious question is - what kind of software is ANY published /
public software when it cannot "connect" to run update?
End of story - any guesses why I cannot "connect" is therefore
immaterial.
.
|
On Wed, May 31, 2023 at 07:10 PM, Anne Ranch wrote:
But I realized LONG time ago that the software is no longer actively updated
etc.
Last release was in March Last commit on github was 3 weeks ago I wouldn't call it "no longer actively updated".
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I have NEVER had a problem with Nano VNA SAVER on my Win10 desktop or laptop.
It connects to a COM port.
It allows me to choose a CAL file which I made earlier (one CAL file for each ham band).
I pick the sweep range.
I usually pick reasonable frequency intervals (mostly one band at a time).
And it takes maybe 10 seconds at most to sweep any ham band.
I often look at 6 graphs at once:
relection coefficient, return loss, SWR, impedance, phase, and Smith Chart
Sometimes for checking filters, I will sweep 1 MHz to 30 MHz, or 130 MHz to 150 MHz.
I¡¯ve never had any problems of any sort!
de barry k3eui
Philadelphia area
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Many OM have big illusions about the capabilities that transformers and other balun unun etc. can have. generally more or less wound on a ferromagnetic core.
Making measurements on these devices is always complicated, among other things because we expect them to be able to transform impedances. If we add the behavior during the transfer of power and the functionalities of symmetrization, it becomes mission impossible to verify.
Do not believe that because you buy a device of this type it will be better than the one you would have made.
To become aware of the limits of these devices, start by testing, measuring, testing, questioning simple 1/1 ratio transformers, balun inverters, etc. Observe the behavior of these devices as soon as the load presents a little reagent (like an antenna).
For 1/9 ratio /transformers/ or more installed at the top of the antenna, we have no idea what they are doing, especially if, at the bottom, we use a tuner.
A concrete example for those who use a simple 1/2 wave doublet fed by a coaxial. Try with and / without balun and try to see the differences. Good luck.
73
--
F1AMM
Fran?ois
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Re: What Google Bard Thinks of the NanoVNA
I'd say Google's AI needs to spend more time bleeding information from this
group. At present it's pretty sketchy and useless.
Dave - W0LEV
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On Wed, May 31, 2023 at 1:20?PM Brian Beezley <k6sti@...> wrote: Just for fun, I asked Google's new Search Labs AI the same question.
Attached is its response..
Brian
-- *Dave - W?LEV*
--
Dave - W?LEV
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Re: What Google Bard Thinks of the NanoVNA
Just for fun, I asked Google's new Search Labs AI the same question. Attached is its response..
Brian
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Jim is absolutely correct. But I didn't want to go into all the nuances of
all the variable parameters.
Dave - W0LEV
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On Tue, May 30, 2023 at 6:03?PM Jim Lux <jimlux@...> wrote: On 5/30/23 2:42 PM, W0LEV wrote:
I've built and measured many common mode chokes (CMCs) using bifilar
windings on toroids (43 and 31 material). Most of the equivalent
characteristic impedances on the cores have measured between 72 and 117
ohms. That is using AWG #12 stranded silver plated and Teflon insulated
wire.
Yeah, and with tinier wire (AWG24,26,28) the impedance tends to be a bit
higher, because the insulation is thicker relative to the diameter of
the conductors.
-- *Dave - W?LEV*
--
Dave - W?LEV
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i prefer nanovna_app
just copy the exe in a folder (like c:/tools/nanovnaapp/) ...
dg9bfc sigi
Am 31.05.2023 um 19:10 schrieb Anne Ranch:
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I believe I found the "problem" with NanoVNA Saver software.
The "sweep" keyboard entry is flaky and apparently when "sweep" is executed it processes anything it feels like it,
But I realized LONG time ago that the software is no longer actively updated etc.
Hence this is non fixable issue...
I am not sure if this is right place to continue posting (about software) -
but I would be interested if there is any other
VNA software currently in use...not just NanoVNA Saver
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NanoVNA Saver is regularly updated so this has no basis in reality.
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On Wed, 31 May 2023 at 19:10, Anne Ranch <anneranch2442@...> wrote: I believe I found the "problem" with NanoVNA Saver software.
The "sweep" keyboard entry is flaky and apparently when "sweep" is
executed it processes anything it feels like it,
But I realized LONG time ago that the software is no longer actively
updated etc.
Hence this is non fixable issue...
I am not sure if this is right place to continue posting (about
software) -
but I would be interested if there is any other
VNA software currently in use...not just NanoVNA Saver
|
I see updates, patches and fixes in the github repository as recently as 3
weeks ago for Nanovnasaver.
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On Wed, 31 May 2023, 18:10 Anne Ranch, <anneranch2442@...> wrote: I believe I found the "problem" with NanoVNA Saver software.
The "sweep" keyboard entry is flaky and apparently when "sweep" is
executed it processes anything it feels like it,
But I realized LONG time ago that the software is no longer actively
updated etc.
Hence this is non fixable issue...
I am not sure if this is right place to continue posting (about
software) -
but I would be interested if there is any other
VNA software currently in use...not just NanoVNA Saver
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There's very little difference between a series and parallel RLC circuit by themselves. With a series circuit, the Q is X/R, where X is the magnitude of the reactance of both L and C at resonance. For a parallel resonant circuit, the Q is R'/X.
The difference comes with the application. For a trap, where you want a low impedance at resonance, the RLC series circuit is connected between two points, for example, a transmission line. A parallel RLC circuit is used where you want a high impedance, for example, the input and output circuits of a tuned amplifier. The main reason to choose R or R' is whichever simplifies the analysis. There is little practical difference in the result between the two choices.
73 de K9GXC (since 1956), Jim
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On May 31, 2023 9:24:01 AM MDT, Mike <mail@...> wrote: On Wed, May 31, 2023 at 08:34 AM, Ho-Ro wrote:
On Wed, May 31, 2023 at 09:06 AM, Mike wrote:
While I could use R+jX at a fixed frequency it appears that RLC (resistor in
series with L, capacitor across both) is frequency independent).
Your RLC (it's really a R-L // C) behaves differently compared with R+jX (this
is R-L-C):
Your mixed series/parallel has Z->R for f->0 and Z->0 for f->oo.
The 2nd pure series has Z->oo for f->0 and Z->oo for f->oo.
So you cannot create a frequency independent equivalent circuit, it's possible
only for a limited frequency range.
Apologies everyone, I made a mistake. The RLC circuit I was looking to define is a trap with all components in parallel as explained here:
Back to school I go ...
--
Mike
--
James M. Potter PhD, President
JP Accelerator Works, Inc.
2245 47th Street
Los Alamos, NM 87544
TEL: (505) 690-8701
EMAIL: jpotter@...
Sent from my Android device with K-9 Mail.
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On Wed, May 31, 2023 at 08:34 AM, Ho-Ro wrote:
On Wed, May 31, 2023 at 09:06 AM, Mike wrote:
While I could use R+jX at a fixed frequency it appears that RLC (resistor in
series with L, capacitor across both) is frequency independent).
Your RLC (it's really a R-L // C) behaves differently compared with R+jX (this
is R-L-C):
Your mixed series/parallel has Z->R for f->0 and Z->0 for f->oo.
The 2nd pure series has Z->oo for f->0 and Z->oo for f->oo.
So you cannot create a frequency independent equivalent circuit, it's possible
only for a limited frequency range.
Apologies everyone, I made a mistake. The RLC circuit I was looking to define is a trap with all components in parallel as explained here: Back to school I go ... -- Mike
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My NanoVNA H4 has these features. I do have the latest firmware installed.
I use these tools to measure inductance and resistance of inductors and
capacitance quite a bit. You will observe that these values are usually
frequency-dependent.
Zack W9SZ
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On Tue, May 30, 2023 at 10:37?PM Fran?ois <18471@...> wrote: NanoVNA allow output Parralel R/X/L/C traces, use DISPLAY->FORMAT S11->MORE-
MORE-> PARALEL __
Hello
Which NanoVNA? my NanoVNA-F probably doesn't.
From the example given in his post, Jim seemed to want to use these values
// to do something else with them. With your nanoVNA, can you retrieve the
// values in a file?
--
F1AMM
Fran?ois
De la part de DiSlord
Envoy¨¦ : mardi 30 mai 2023 17:17
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On Wed, May 31, 2023 at 09:06 AM, Mike wrote:
While I could use R+jX at a fixed frequency it appears that RLC (resistor in
series with L, capacitor across both) is frequency independent).
Your RLC (it's really a R-L // C) behaves differently compared with R+jX (this is R-L-C): Your mixed series/parallel has Z->R for f->0 and Z->0 for f->oo. The 2nd pure series has Z->oo for f->0 and Z->oo for f->oo. So you cannot create a frequency independent equivalent circuit, it's possible only for a limited frequency range.
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On Wed, May 31, 2023 at 05:35 AM, DiSlord wrote:
On Tue, May 30, 2023 at 08:37 PM, Fran?ois wrote:
Which NanoVNA? my NanoVNA-F probably doesn't.
Yes only H/H4/V2/Lite and my firmware.
PS NanoVNA-App also allow output Parallel R+jX S11
Ah yes, I use NanoVNA-App and I hadn't seen that. I want to enter my choke characteristics into an EZNEC antenna simulation. While I could use R+jX at a fixed frequency it appears that RLC (resistor in series with L, capacitor across both) is frequency independent). -- Mike
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Ho-Ro
Barry K3EUI
