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Date
Who has used the nanoVNA wiki to find information? #wiki

 

I did
Re: The Male Calibration Kit for AliExpress

 

Hello Kurt,
In order to minimize the confusion of beginners, please change Ohm's Law: R [Ohm] = U [Volt] / I [Ampere] or R = V / A.
73, Rudi DL5FA
Re: Abbreviated documentation for more simplistic tasks?

 

Supplementary material could be pointers into the wiki,
though I'm a bit worried about random people going in and "fixing" wiki pages.
Wiki has a tool for differencing revisions;
don't know what happens if/when more than one simultaneous edit..

I don't recall any issue reported resolved by checking the Wiki,
wonder whether it gets much use at all.
Re: Abbreviated documentation for more simplistic tasks?

 

some years ago I wrote up some notes on the Smith Chart
Added to Wiki
/g/nanovna-users/wiki/External-links
Re: The Male Calibration Kit for AliExpress

 

Kurt,
Thank you for sharing
Praveena
VU2PGB

On Sat, Oct 19, 2019, 8:40 PM Kurt Poulsen <kurt@...> wrote:

Hi All

I have created a pdf document for the N male calibration kit mentioned
earlier to day, where the link probably will work better and the data plus
hints are included

Maybe some one want to put it on the WiKi

Kind regards

Kurt
Re: Abbreviated documentation for more simplistic tasks?

 

I see value in an online "Start Here" with e.g. animated GIFs for touch screen navigation
Such animated GIFs are too large to load and run quickly, so mp4..

Is something like this useful?
Re: The Male Calibration Kit for AliExpress

 

put it on the WiKi
done
/g/nanovna-users/wiki/Application-Notes
Re: The Male Calibration Kit for AliExpress

 

Many thanks, Kurt. I purchased a similar-looking set from eBay a few weeks ago.

- Jeff
The Male Calibration Kit for AliExpress

 

Hi All

I have created a pdf document for the N male calibration kit mentioned
earlier to day, where the link probably will work better and the data plus
hints are included

Maybe some one want to put it on the WiKi

Kind regards

Kurt

Calibration setting for the male calibration kit from AliExpress.pdf
Calibration setting for the male calibration kit from AliExpress.pdf

Re: Problem with cho45 web interface

 

Works perfektly with hugen's new firmware. Thanks.
Re: Measuring ferrite beads #test-jig

 

Wondeful, that is exactly what I was looking for !!

Thanks for the link !!!



?TypeApp for Android herunterladen ?

Am 19. Okt. 2019, 09:35, um 09:35, "Starsekr via Groups.Io" <starsekr@...> schrieb:

W. Reeve, T. Hagen, K. Poulsen published some data from and described
their techniques of measuring ferrite beads in "Radio Astronomy
Magazine" in 2013. They did a lot of work developing test fixtures
and error analysis. You can find their papers at :
Re: N male calibration kit

 

Hi Praveena

The male short Offset is 18.5ps

The male open Offset is 20.5ps or if you want to enter the C coefficient then:

The male open Offset is 17.4ps C0=62.14 C1=-143.07 C2=82.92 C3=0.78

For the load you may measure the resistance by mounting it in a female bulkhead adaptor and sending a constant current of 100mA through the load and measure the voltage drop followed by using ohms law ?

The might for the load be an inductive or capacitive parasitic component. Try to sweep a short test cable of 0.5m from 50KHz to 9000MHz and observe two traces. Smith chart and a Mag dB trace. The Smith chart shall show a trace running slightly inwards with increasing distance to the circumference and the Mag dB trace flat horizontal up to about 100MHz then sloping downward against a linear running above 300MHZ with linear increasing loss. If not so then tune the load inductance either as a small positive number (inductive load)or negative (capacitive load) until the best possible result. NonoVNAsaver does not yet support shunt C so a negative inductance will do the job adequately. Do not tune the short and open.

I attach an image for the s11 return loss. You should see a trace sloping down up to 300MHz like on the picture. The trace have run from 0.1dB to 0.2dB at 900MHz but does not, due to the imperfection of the NanoVNA and lag of error correction. This sweep was for a professional Airline with so to speak no loss, but sweeping a traditional test cable you will see more loss at 300 as well at 900MHz. However the task is never to measure impedances close to the edge of the Smithchart but ensuring above setting helf the accuracy at impedances of interest up to some 5K maybe 10K ohm.

Kind regards

Kurt



-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Praveena NG
Sendt: 19. oktober 2019 13:40
Til: [email protected]
Emne: Re: [nanovna-users] N male calibration kit



Hi Kurt,

Request to share data to be entered in nano vna saver for n type calibration kit, Regards, Praveena

On Sat, Oct 19, 2019, 4:19 PM Kurt Poulsen < <mailto:kurt@...> kurt@...> wrote:



Hi All
Some years ago I bought a N male clone calibration kit which is a
HP85032E clone kit. It is not that bad(pretty good) and data are very
close to what can be found on the Agilent homepage.
To day I bumped into the kit again on Aliexpress at the following link
<>
.0.0.4
fe1303fMMImSf
<
t.0.0.4fe1303fMMImSf>
<
<> .
4fe1303fMMImSf&algo_pvid=6d6a9d32-85a8-428f-a09e-b2a6fc1e830e&algo_exp
id=6d6
a9d32-85a8-428f-a09e-b2a6fc1e830e-1&btsid=afe902d6-210b-40cb-9ac8-21ed
ca20b2
40&ws_ab_test=searchweb0_0,searchweb201602_10,searchweb201603_52
<
t.0.0.4fe1303fMMImSf&algo_pvid=6d6a9d32-85a8-428f-a09e-b2a6fc1e830e&al
go_expid=6d6a9d32-85a8-428f-a09e-b2a6fc1e830e-1&btsid=afe902d6-210b-40
cb-9ac8-21edca20b240&ws_ab_test=searchweb0_0,searchweb201602_10,search
web201603_52>
&algo_pvid=6d6a9d32-85a8-428f-a09e-b2a6fc1e830e&algo_expid=6d6a9d32-85
a8-428
f-a09e-b2a6fc1e830e-1&btsid=afe902d6-210b-40cb-9ac8-21edca20b240&ws_ab
_test=
searchweb0_0,searchweb201602_10,searchweb201603_52
So if you purchase a set I can provided the data to enter in the
NanoVNA-saver and you will be in good shape calibration male N
Kind regards
Kurt

APC7 Airline RL 50 to 900MHz.png

Re: Abbreviated documentation for more simplistic tasks?

 

On Sat, Oct 19, 2019 at 06:48 AM, Dick wrote:


ps: still trying to figure out a Smith Chart
Dick, some years ago I wrote up some notes on the Smith Chart (basically describing where those funny curves come from). It might not be what you are looking for, but if interested, go here:



- Jeff, k6jca
Re: Abbreviated documentation for more simplistic tasks?

 

From: Dick

I am all in favor of a "VNA For Dummies" book !!

73, Dick, W1KSZ

ps: still trying to figure out a Smith Chart
========================================================

Dick,

Such a book was published for the DGS8SAQ VNWA 2/3 Vector Network Analyser.



While it's for different hardware, the basic principles should be the same. You might look out for videos by DGS8SAQ as well.

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv
Re: Newbie

Tom Crosbie G6PZZ
 

I too am a prospective buyer and I joined this group hoping to elicit more information. However the volume of argument over esoteric minutiae is putting me off. I agree with the call for simplified documentation to enable users to be able to use the device "out of the box" and for simple tasks. I think many purchasers/users of this item will be hobbyists attracted by the price which is a tiny fraction of that of other commercially available products. Professionals will already be using professional equipment and trying to make this device perform the same seems beyond the scope of it's design parameters.

Tom G6PZZ

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of hamrad45
Sent: 19 October 2019 14:50
To: [email protected]
Subject: [nanovna-users] Newbie

I recently saw a YouTube video on these devices and I am very interested in getting one. Checking Amazon for instance, there are dozens of sellers of these and prices range from $35 to $85. I have no idea which one to get and which sellers are better. Any info would be greatly appreciated. My YouTube ID is hamrad88.

Thanks,

Tom Stiles
Re: Newbie

 

I bought one from here... It seems to work OK and and has the shielding fitted.

Re: NanoVNA-Saver 0.1.3

 

On Sat, Oct 19, 2019 at 05:58 AM, <erik@...> wrote:


would it also be possible to recalculate the sweeped data in the main window
with the new values from the updated calibration standard?
Rune,

I also think this is a great idea. Calibration standard tuning is here to stay :>). Calibration tuning works much better in nanoVNA-Saver than the electrical delay tuning in the nanoVNA firmware version 0.2.3. I am not sure what the differences might be.

--
Bryan, WA5VAH
Re: Abbreviated documentation for more simplistic tasks?

 

Oristo,

You make some good points.

Perhaps the tutorial assumes the user buys a particular nanoVNA, such as from Hugen.


A better solution would be to cover the the more popular variants with section headings
that clearly state whether or not the reader will care about that particular section.
For example:

Did your unit not arrive with a battery included, a rectangular silver lump
between the main PC board and the back panel?
Then you either must always have power applied through the USB connector
when using it, or you will have to obtain and install a battery.
Here are potential sources for a battery, and how to install it .....

When you first turn it on, if the screen looks like this photo:
<photo>
Then instructions for navigating the menus are as follows ....


The basic instructions should point to a good document on how to
download different firmware. But I'd assume that any firmware will be
sufficient for basic use, such as finding the SWR of an antenna or the
response of a filter. Or determining the complex impedance of a load.

A good beginner's document will indeed be tough to get right, for lots of reasons.
I'd think it will have to be an integrated whole written by one author,
Supplementary material could be pointers into the wiki,
though I'm a bit worried about random people going in and "fixing" wiki pages.
Perhaps once the wiki has developed some, we have a group of
knowledgeable people evaluate/edit the key material into a User's Guide.

Jerry, KE7ER

On Sat, Oct 19, 2019 at 04:43 AM, Oristo wrote:


Introductions are tough; new owners may be impatient as well as uninformed
and/or misinformed.
NanoVNAs are not all the same; some have battery, calibration kit and already
touch screen and SOLT calibration.
* How many new users want to go thru exhaustive instructions for all?
Some menus and functions change among firmware versions
* Should new user instructions first try to install some latest stable
firmware?
Newbie

 

I recently saw a YouTube video on these devices and I am very interested in getting one. Checking Amazon for instance, there are dozens of sellers of these and prices range from $35 to $85. I have no idea which one to get and which sellers are better. Any info would be greatly appreciated. My YouTube ID is hamrad88.

Thanks,

Tom Stiles
Re: Abbreviated documentation for more simplistic tasks?

 

I am all in favor of a "VNA For Dummies" book !!

73, Dick, W1KSZ

ps: still trying to figure out a Smith Chart

Sent from Outlook<>
________________________________
From: [email protected] <[email protected]> on behalf of YT9TP - Pedja via Groups.Io <yt9tp@...>
Sent: Saturday, October 19, 2019 6:44 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] Abbreviated documentation for more simplistic tasks?



On 19.10.2019 15:21, Dr. David Kirkby from Kirkby Microwave Ltd wrote:
So in summary, I would advise against recommending newcomers look to
YouTube for information.

But, if someone who knows make selection and list tutorials that are
good that would make a difference, right?


--
73,
Pedja YT9TP

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