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NanoVNA V2 Plus4 "N"?


Brad Morris 2020/12/01 08:11

Does anyone know if there will be a version of the NanoVNA V2 Plus4 with type N connectors?  The SAA-2N is really the best configuration for durability and repeatability.  When the VNA was truly "nano", it made sense to use SMA connectors.  For the larger 4 inch or larger screen size, type N is ideal and fits the case.

Regards,
Brad

Stephen Laurence 2020/12/01 11:43

It seems that we are in the minority.

I feel that the solid case and N connectors make the 2N look and feel more robust and I am on the point of buying a second 2N rather than buying a plus4 (I have several sma v2 devices as well). There..., heracy I have said it.

I am not even sure I want to convert it to a v2plus, as I would no longer be able to use the Obijan Japanese software, which is able to look at narrow band filters such as crystals (see some recent posts).

Well, these devices cost about the same as a full tank of petrol for my (gasguzzling) car, so I suppose I could treat myself if I did not drive my car for a week.

We should be grateful that these devices even exist, and support the original designers by buying the newer devices. When all said and done, the sma connectors, when bolted correctly onto the metal case are not too bad. Just be careful if attached to some fairly stiff coax via adaptors, and be careful of esd (see recent posts).

Steve L

KA3YAN 2020/12/01 12:09

Steve,

I 100% agree with you on all points.  Having such a huge community or users and supporters makes these devices very attractive...not to mention the cost.  My post was more out of curiosity than criticism.  If there is no V2 Plus4 with type N connectors, it isn't a show stopper.  If that version were to be announced, I might hold off on buying the SMA version though.

Brad

Siegfried Jackstien 2020/12/01 20:35

the saa2n is just an sma device with sma to n adaptors screwed on (and
soldered for more stiffness) ... and the n adaptors have NO flange insid
behind the case wall so the force that you add to the n sockets directly
make it to the sma socket and the pcb

even if it looks good in first view ... the socket does hold the case
wall and not the wall holds the socket!! ... yes the n connectors are
better (especially if you have dozens of connects disconnects the sma
socket may fail sooner or later) ... but the mechanical thing is not
solved right ...

there should be a flange (or soldered nut) on the inside of the case

on my plus4 i found inside 2 nuts on the 2 sockets (same size as
outside) ... i soldered those nuts to the socket (only the inside nut hi
hi) ... now i can really tighten the outer nut and any force is going to
the case and not to the pcb

if you can live with a bit slower scan speed and do not need the area
above 3 gig ... then the saa2n is a good unit to buy

if you want a higher scan speed and maybe need the higher dynamic range
(lower s21 leaking) then get the plus4

both units are superb (yes i have  both ... and the saa2n is modded to
plus version) ... but be careful with mechanical stress on the n sockets
cause those sockets ... are just adaptors screwed on the sma sockets

in direct compare the saa2n has a tiny bit better lcd ... more contrast
and a tiny bit brighter ... nothing to worry about when you buy the
plus4 ... its screen also is good ... but when i use them both i can see
a tiny small difference

best bang for the buck ... saa2n

best buy if you need more dynamic range and speed (and higher sweep
range up to 4g) ... v2plus4

so i would say ... most users will be good with the saa2n ... but there
are a few points that count for the plus4

and ... the plus 4 does NOT have a flat battery pack that may blow up
and crack the lcd screen ... it has a standard 18650 round cell so i
guess for long time use its a bit safer at the end

greetz sigi dg9bfc

Am 01.12.2020 um 20:09 schrieb KA3YAN:

Ron Grassl 2020/12/01 12:40

I just received one of the SAA-2N Nano VNA-V2 from banggood for $87.35. It took 2 months to get it .   It works fine so far.  Very nice mechanically with the N connectors, except I need to order adaptors now.  Charged it up first, for maybe 2 hours for the red light to stop blinking. The supplied cables and cal standards are great.  Calibrated it using the supplied standards over some low freq range around 7 MHz. Cal seems good.  I have a 4 dB Narda N connector precision attenuator that measured to within 0.1 dB of the label marking on S21.  Loaded up the nano vna-saver software on my win 10 laptop, did the 40 meter cal and it all worked just fine as advertised first try.  Very nice, maybe overly ruggedly built, kinda heavy, considerably better than I expected. The soft case is a nice addition. but take a pic before you take things out so you know how to re-pack it.   Need those adaptors to do some real work.  Spent 26 bucks on various N adaptors to SO239 and SMA, on Amazon so far.
AG6ST

Siegfried Jackstien 2020/12/01 21:22

hmm i think that you also can measure those filters with the plus or
with normal saa2n ... you just have to select a small scanning area and
calibrate in that small area ... but using a scan from 10meg to 3 g to
calibrate ... and then only use a few megs bw  say from 15 to 17 megs
(for a 16 megs xtal) for measure .. that does not work well for sure

if calibrated in that small area it also should measure well in that
small area ... use fine steps and high avg setting ... yes its slow then
.. but more accurate

greetz sigi dg9bfc


Am 01.12.2020 um 19:43 schrieb Stephen Laurence:

Stephen Laurence 2020/12/02 01:24

Dear Ron,

Does your V2N show the cpu serial number on the Config > Version page?
It is SN: then a long three group hexadecimal number immediately below the title
“NanoVNA V2-2”.

The current Banggood advert has a picture of this sreen page, but there is no serial number, so presumably might be a clone.

I ask because, first, you need this serial number if you want to upgrade the device to V2plus (most consider this worth doing), and I am thinking of buying a second (upgradeable) V2.

Steve L

OwO 2020/12/02 18:21

There's most likely not going to be any official hardware with N
connectors, main reasons are shipping weight and crosstalk from the PCB
to connector transition.

The plus4 SMA connectors have nuts on the inner side of the metal box so
it is more durable.

Hector Pascal 2020/12/02 03:17

Interesting point, Stephen,  I did a quick visual survey of all the SAA2N versions available on AliExpress and eBay - also including the one on Bangggood.

Where a version screen photo is shown, none show a serial number - even the Zeenko/Hugen version currently does not.  And the number has NOT simply been erased.
There can also be other differences like "Kernel: none",  and "Architecture: arm core variant N/A", which I guess may be related to the f/w version (mine is now updated to 20201110).  However, my own early version from Zeenko DOES have a serial number of the format you mention.

I can draw NO real conclusions from this evidence!  Is the serial number on 2N's associated with the hardware - or maybe it's the firmware - although this would seem odd.

It's also fairly obvious from my mini survey, that the suppliers who publish a low available stock amount, tend to "steal" each other's photos - which is a very common practice for all online sellers.

H-P

Stephen Laurence 2020/12/02 04:54

Dear Hector,

I thought I had better check my other two v2 devices that I have with me.

My early, uncased (probably not a clone) V2 shows the cpu seriel number. But my “black and gold” V2 with 3.2” screen (and Obijan firmware) does NOT show a serial number. I understood (open for correction) that both the “black and gold”, and the V2N were Hugen “creation plus clone”.

I will reflash it, when I can, to the traditional firmware and see if it is then displayed. I do not know if the information displayed, eg serial number, fpu present etc is entirely firmware or if some info is dependent on the bootloader.

Steve L
.

KA3YAN 2020/12/02 07:40

>
> "There's most likely not going to be any official hardware with N
> connectors, main reasons are shipping weight and crosstalk from the PCB to
> connector transition."
>

This is the information I really needed to finalize my decision to purchase the V2 Plus4.  Thanks OwO!

Great discussion in this thread.  Thanks to everyone who contributed.

Brad

Ron Grassl 2020/12/02 08:37

I don't see any serial number.

Siegfried Jackstien 2020/12/02 17:40

Upload a newer fw that then will show serial number

Dg9bfc sigi



Am 02.12.2020 17:37 schrieb "Ron Grassl via groups.io"
<rwgrassl=verizon.net@groups.io>:

> I don't see any serial
number.![](cid:attach_0_164CF39DFAF2A9DD_28778@groups.io)



_._,_._,_

* * *

Stephen Laurence 2020/12/02 09:10

On Wed, Dec 2, 2020 at 04:40 PM, Siegfried Jackstien wrote:

>
> Upload a newer fw that then will show serial number
> Dg9bfc sigi
>
> Am 02.12.2020 17:37 schrieb "Ron Grassl via groups.io"
> <rwgrassl=verizon.net@groups.io>:
>
>> I don't see any serial number.
>
>
>

Ahah...., that is a relief. I suspected that was the case but could not be sure.

Steve L

Don Bomer, W5MML 2020/12/02 12:05

That is the same version screen that I get on my 2N from R&L Electronics.
Don...🤠

Ken Sejkora 2020/12/10 12:14

Please have patience with my newbie questions.  I just received my new SAA-2N from R&L Electronics, the one with the 4-inch display and Type-N connectors.  The version display is identical to that posted in Message #673, including the firmware version dated 19-Jun-2020.  This is hardware version 2_2.

My question is which firmware should I use for the update?  According to the nanorfe.com website, there are three "official" versions, one for the 2.8" V2 Plus V2.3,  a second for the 4" V2 Plus4 V2.4, and a third for the 2.8" V2.2.  All three have a build date of 20201013, but presumably each build only supports a given circuit board hardware configuration.

If the circuit board in mine is Version 2_2, is that the same as Version 2.2 on the nanorfe.com website?  Should I upload the V2.2 firmware for the 2.8" display for compatibility with my H/W board, or should I uses the V2.4 firmware for the 4" Plus4 to support the larger screen size on my unit?  I don't want to risk "bricking" my unit by installing the wrong firmware.

Finally, on the "Home" page of this discussion group, there is mention of an even newer firmware build of 20201122.  Where does one obtain this latest firmware build?  The link provided for firmware updates on the Home page links over to the nanorfe.com website, where only the 20201013 firmware is available.  I also checked on the 'Files' tab of this discussion group, but don't see any files posted there.

Any assistance would be greatly appreciated.

Regards,
Ken Sejkora, WB0OCV

Harry Bloomberg 2020/12/10 16:01

Ken, thanks for posting. I just bought the exact same device and have the
identical questions and issues. Please post answers to the group. If you
do decide to reply directly to Ken, please cc me.

73,
Harry Bloomberg W3YJ

On Thu, Dec 10, 2020 at 3:14 PM Ken Sejkora <kjsejkora@comcast.net> wrote:

Kadir Mariño Abreu 2020/12/10 13:18

I hope this link is helpful

https://www.youtube.com/watch? v=rE0C01R3Lno ( https://www.youtube.com/watch?v=rE0C01R3Lno )

https://nanorfe.com/downloads/ ( https://www.google.com/url?q=https%3A%2F%2Fnanorfe.com%2Fdownloads%2F&sa=D&sntz=1&usg=AFQjCNE8MEG6WJJ3WgkteSo9Z5bHPaR1HA )

https://github.com/nanovna/ NanoVNA-QT/releases ( https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fnanovna%2FNanoVNA-QT%2Freleases&sa=D&sntz=1&usg=AFQjCNFX1hwL68YKcB2KmHBcGrLX8RN2_g )

Harry Bloomberg 2020/12/10 16:23

I've been through these pages and they do not mention the SAA-2N, unless
I'm missing something.

For example, in https://nanorfe.com/downloads/20201122/, which file is for
the SAA-2N? I don't want to risk downloading the wrong file and bricking
my device.

73,
Harry W3YJ

On Thu, Dec 10, 2020 at 4:18 PM Kadir Mariño Abreu <cm3kma@gmail.com> wrote:

Harry Bloomberg 2020/12/10 16:25

And in https://nanorfe.com/nanovna-versions.html, which one of these
devices is the SAA-2N?

73,
Harry Bloomberg W3YJ

On Thu, Dec 10, 2020 at 4:23 PM Harry Bloomberg via groups.io <hbloomb=
gmail.com@groups.io> wrote:

Kadir Mariño Abreu 2020/12/10 13:28

In the video I think they mention your version and the steps to follow?

https://www.youtube.com/watch?v=rE0C01R3Lno

Ken Sejkora 2020/12/10 17:04

Hello Harry,

I had the same question. I watched the video, and even though I don’t speak Spanish, I was able to see where the author downloaded the firmware and which version he used for the SAA-2N. If you activate the YouTube video and fast-forward to 6:05 in the video, it appears that there used to be an “old” display on the nanorfe.com page for the “unofficial” devices. It appears that the 4” version of the SAA-N2 Version 2_2 board is the firmware that contains the string “..~..-st7796.bin”. There appear to be updates dated 20201013 and 20201122 that have the st7796 firmware.

I plan on giving it a shot in the morning. I’ll let you know if I’m successful.

Ken, WB0OCV

From: Harry Bloomberg
Sent: Thursday, December 10, 2020 04:25 PM
To: NanoVNAV2@groups.io
Subject: Re: [nanovnav2] NanoVNA V2 Plus4 "N"?

And in https://nanorfe.com/nanovna-versions.html, which one of these devices is the SAA-2N?

73,
Harry Bloomberg W3YJ

On Thu, Dec 10, 2020 at 4:23 PM Harry Bloomberg via groups.io <hbloomb=gmail.com@groups.io> wrote:
I've been through these pages and they do not mention the SAA-2N, unless I'm missing something.

For example, in https://nanorfe.com/downloads/20201122/, which file is for the SAA-2N?  I don't want to risk downloading the wrong file and bricking my device.

73,
Harry W3YJ

On Thu, Dec 10, 2020 at 4:18 PM Kadir Mariño Abreu <cm3kma@gmail.com> wrote:
I hope this link is helpful

https://www.youtube.com/watch?v=rE0C01R3Lno

https://nanorfe.com/downloads/

https://github.com/nanovna/NanoVNA-QT/releases

Harry Bloomberg 2020/12/10 17:08

Ken, thanks! I will take a look at that. Please let me know how the
update goes. And in the meantime I hope we get some pointers to actual
written documents.

73,
Harry Bloomberg W3YJ

On Thu, Dec 10, 2020 at 5:04 PM Ken Sejkora <kjsejkora@comcast.net> wrote:

hwalker 2020/12/10 14:15

On Thu, Dec 10, 2020 at 01:25 PM, Harry Bloomberg wrote:

>
> And in https://nanorfe.com/nanovna-versions.html , which one of these
> devices is the SAA-2N?
>
>

The SAA-2N is considered persona non grata by the original developer of the V2 and is not officially supported by any firmware versions at https://nanorfe.com/nanovna-versions.html.  Unofficially, the V2.74 Black Magic is a 4" V2 design that matches up with the SAA-2N and users have loaded its firmware on the SAA-2N successfully.

- Herb

Harry Bloomberg 2020/12/10 17:18

Thanks! I did not know that. I have until Jan 31 to return to Amazon and
I will have to take that into consideration.

73,
Harry Bloomberg W3YJ

On Thu, Dec 10, 2020 at 5:15 PM hwalker <herbwalker2476@gmail.com> wrote:

Dragan Milivojevic 2020/12/10 23:32

You can't brick your device, bootloader is always
available and even (highly unlikely) if you damage the
bootloader you can flash the firmware using a cheap $3 programmer.

On Thu, 10 Dec 2020 at 22:23, Harry Bloomberg <hbloomb@gmail.com> wrote:

Kadir Mariño Abreu 2020/12/10 14:45

SAA-2N with the latest firmware available vers. 20201013. The correct version to use with this hardware is this: (4 "" V2.74 "from blackmagic), the most current one is: nanovna-v2-20201122-v2_74.bin

https://nanorfe.com/downloads/20201122/

https://nanorfe.com/nanovna-versions.html

Beware of your NanoVNA V2 hardware. Different hardware requires different firmware.

Also with this version, once updated, the device must be calibrated again, including the touch screen. Use the navigation keys to move around the menu. Once calibrated, the configuration must be saved otherwise everything will be lost once the device is turned off. With this new firmware version, when powered on, the Nano VNA automatically loads the calibration saved in position C0.

Harry Bloomberg 2020/12/10 17:49

Thank you!!!

73,
Harry Bloomberg W3YJ

On Thu, Dec 10, 2020 at 5:45 PM Kadir Mariño Abreu <cm3kma@gmail.com> wrote:

To reply to this topic, join https://groups.io/g/NanoVNAV2

View this thread on groups.io