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Hi John, Mike,

Several folks have done various measurements including myself. Measurements and records between big box VNA and the nanoVNA would be of interest. However, that said, my best guess is that the agreement below a few hundred MHz will be excellent. For the most part that is what I have found although I did not bother with making recordings of the sweeps between instruments. I expect as you approach 900 MHz that the deviation between measured on big box vna and the nanoVNA will be larger. The simple fact is due to the accuracy and records stored for the calibration pieces. The SMA short, open and 50 ohm load, I SUSPECT are treated as ideal elements. They are certainly not ideal. I am in the process of finding out from the developer how these calibration pieces are handled. Regards, Alan

Hi.

Got my from Lusya/Aliexpress on the last week.
Its in black color with battery and USB-C connector. Was ordered in begin of June.


Just one note - included 50 Ohm dummy load looks like was used... Its have some scratch on hex part.
VNA device, open and shorted loads is 100% new.

Working well at all. Best instrument for price/options, imho.

73, Serge

Yes, the various clones 'should' work the same way.

As for placing your unit into DFU mode, the contacts only need to be shorted at power-up, that is why I soldered a small button switch there.
After power-up and you have the white screen, you can release the button.
I've pushed firmware to my unit several times using this method.

I used a button from a scrap cellphone - see photo

Good luck!

No problem. Larry mentioned the Gecko version in his explanation but the
black ones should work in exactly the same way.

Mike

On Fri, 19 Jul 2019, 18:35 herbieg via Groups.Io, <herbieg=
[email protected]> wrote:

hi mike
thanks for that i will have a go to see will it work
herbie

hi larry
thanks for that i will have a go to see can i get the nanovna to work
herbie

hi mike
thanks for that i will have a go to see will it work
herbie

Updating F/W on the white Gecko unit is simple:
I placed a momentary push button switch on my unit - see my previous posts and photos.
You'll need to ensure the DFU driver is installed.
Do this by:
-Install all the uP drivers - you should see the pop-up windows as in my previous posts
-all drivers are in the "DFU Utility - STSW_STM32080_V3.0.6.zip" file
-Install the DFUdemo utility "DfuSe_Demo_V3.0.6_Setup"
-turn OFF the NanoVNA and short the DFU terminals/pads on the edge of the board
-turn ON the NanoVNA and you will see only a white display - that's OK
-plug the NanoVNA USB into your PC - it should recognise the VNA is in DFU mode
-run the DfuSe_Demo and follow the instructions in its PDF file (attached)
-after pushing F/W, reset the calibrations and re-calibrate per Hugen's remarks in previous posts.

ALL of the above can be had just by reading through the previous posts in this forum......

Hi Herbie, I don't think anyone responded to you about loading firmware.

I haven't tried it yet but Hugen kindly shared a link to his manuals in an earlier post, one of which explains how to update by shorting two contacts together. (See the firmware folder.)

"This is the user manual

Regards Mike

Great. Got it and thanks again!

Alan

________________________________
From: [email protected] <[email protected]> on behalf of hugen@... <hugen@...>
Sent: Friday, July 19, 2019 1:50 PM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] The nanoVNA calibration standards

On Fri, Jul 19, 2019 at 09:39 PM, alan victor wrote:

Hi Hugen,

I looked at schematic but could find no email address.

Can you please send. I do see your signature on the VNA diagram from EASYEDA,
that is all I found.

On Fri, Jul 19, 2019 at 09:39 PM, alan victor wrote:

Hi Hugen,

I looked at schematic but could find no email address.

Can you please send. I do see your signature on the VNA diagram from EASYEDA,
that is all I found.

Alan,
It's on the webpage...

メールの宛先: edy555+kit “at” gmail.com ”at”をアットマークに置き換えてくださ

Hopefully, it still works.

Hi Hugen,

I looked at schematic but could find no email address.

Can you please send. I do see your signature on the VNA diagram from EASYEDA, that is all I found.

Hi John

I'll report back when I can but it may not be for a week or two. I know two
other people with more expensive VNAs. One cost >?1k but is suspect,
despite having just been 'repaired'. The owner of the other one is heading
off on hols for a week.

I hope you got the full calibration set btw. Mine was missing the short and
the seller hasn't responded to my ebay message. :-(

73

Mike

On Fri, 19 Jul 2019, 09:01 John Woods via Groups.Io, <g1euh=
[email protected]> wrote:

Hi Mike

I've just bought an identical nanovna from the same seller in the UK, it
seems to work ok, but I have nothing to compare it against, I would be
interested in any comparisons you make with more expensive equipment.

John.

Hi Mike

I've just bought an identical nanovna from the same seller in the UK, it seems to work ok, but I have nothing to compare it against, I would be interested in any comparisons you make with more expensive equipment.

John.

Price seems in the right range.

Has anyone here bought a Nanovna from Lusya?

Excellent, thank you.

________________________________
From: [email protected] <[email protected]> on behalf of hugen@... <hugen@...>
Sent: Friday, July 19, 2019 1:13 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] The nanoVNA calibration standards

This is the original design of edy555

You can find the email on the Schematics.

This is the original design of edy555

You can find the email on the Schematics.

Do you have a direct email address for him.... I do not utilize Twitter.

________________________________
From: [email protected] <[email protected]> on behalf of alan victor <avictor73@...>
Sent: Friday, July 19, 2019 12:40 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] The nanoVNA calibration standards

Thanks Hugen. I will do that and pass the information along to the users group.

Regards, Alan Victor

________________________________
From: [email protected] <[email protected]> on behalf of hugen@... <hugen@...>
Sent: Friday, July 19, 2019 12:36 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] The nanoVNA calibration standards

Sorry for my limited ability, it is recommended to contact the original designer edy555() to discuss this issue.

hugen

Thanks Hugen. I will do that and pass the information along to the users group.

Regards, Alan Victor

________________________________
From: [email protected] <[email protected]> on behalf of hugen@... <hugen@...>
Sent: Friday, July 19, 2019 12:36 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] The nanoVNA calibration standards

Sorry for my limited ability, it is recommended to contact the original designer edy555() to discuss this issue.

hugen

Sorry for my limited ability, it is recommended to contact the original designer edy555() to discuss this issue.

hugen