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1 Hour... Good info... Excellent Intro.... Time well spent.... From R&S.

I would return it. Alternatively check with the manufacturer if your unit
is genuine and that their warranty policy is.

On Tue, 11 Mar 2025 at 23:23, alsodanev2 via groups.io <alsodanev2=
[email protected]> wrote:

I got it from an auction site called nellis auctions. They sell surplus
amazon merch.
I have called them and they are will to return my $$ upon return of
defective unit. But cannot exchange it for a different one.

I got it from an auction site called nellis auctions. They sell surplus amazon merch.
I have called them and they are will to return my $$ upon return of defective unit. But cannot exchange it for a different one.

Thanks, looks like this is the only answer I got.
Where could I get a more definite answer? This should be mentioned somewhere, in a documentation or in gitlab. :/

I managed to get it work with v1.2.40 firmware from DiSlord and the DfuSe Demo software.
Initially I was using the wrong path to update the firmware, essentially uploading instead of updating, like in the photo. Rookie mistake.

Hello everyone!

I managed to brick my nanoVNA H (clone, as I've found later on this forum) and now it is showing a white screen.
First of all, I should have read this forum before the purchase and buy the real thing, but the product looked legit at the first glance.
Second, I should've made a copy of the initial firmware before I install the new one. But what is done is done and I'm looking forward for a posible solution.
Do you know what firmware came with this thing in the first place, to help me roll back? Since it is a sofware problem I imagine it can be done, but the seller didn't provided his support. Thank you!
There are some pictures with the front, back and inside the nanaVNA.

Yes, use ZeeTK, the new version firmware will perform an LCD clear during the boot process and the color stripes will disappear after boot.

You might start with stating where you got it from?

On Tue, 11 Mar 2025 at 02:19, alsodanev2 via groups.io <alsodanev2=
[email protected]> wrote:

So i have in front of me a brand new in package/container: a brand new -f
v2
All metal housing, protective plastic on screen.
Upon start. Turn on. Screen flashes white then goes dark.
Very faint lines and bars visible.
This is a brand new unit.
I am disinclined to take apart and mess with internals.

Should i return? Warranty?
How good is the company/manufacturer customer service?

So i have in front of me a brand new in package/container: a brand new -f v2
All metal housing, protective plastic on screen.
Upon start. Turn on. Screen flashes white then goes dark.
Very faint lines and bars visible.
This is a brand new unit.
I am disinclined to take apart and mess with internals.

Should i return? Warranty?
How good is the company/manufacturer customer service?

I have NanoVNA-H version 3.6.1_SM_ST. I had 1.2.27 (20.02.2024) from the factory.

During startup I had dashes, colored stripes on the screen.
I downloaded new software from hugen79 in version 1.2.43.
I chose the NanoVNA-H-ZK 2.8-inch NanoVNA-H using SJWCH5351 as signal source, machine label hardware version ZK or SM_ST ending because nan SM_ST.
Did I do it right?
MODE ZEETK generator system has now appeared.
Should I stay on ZEETK or change to Si5351 or MS5351?

Hi

I think a 12Khz IF offset should be kept at default value and forget it , it gives the optimal Harmonic ratio filtering with the RC 1sft ordre low pass filter in the Hardware of nanovna

73's Nizar

I am learning about RF and antennas and I want to understand how do I figure out how much the IF offset is, in NanoVNA-H4. I could not find any article explaining how to check if the default IF OFFSET (12kHz) is accurate.

I also do not understand why its called an offset, since from what I read, this is the frequency that the VNA downconverts and uses it for receive-measure purposes. So it should say "IF", not "IF OFFSET".

After all if it was indeed an offset setting, it would be default to 0, not around 12kHz.

I first used a VNA when I was in Engineering within a National Broadcasting Network (CBC) and we used it for optimizing our transmitters and antenna systems. As a Young engineer it was an eye opener to see the physical display of and RF device, which prior to this was literally only a mathematical exercise. Carrying a VNA into the field was unheard of. Later when I moved on to a TELCO and became involved in the Cellular aspect go the RF Filtering and Antennas I had to design a carrying case to enable the carrying of the VNA into the field for compliance testing, all be it at the ground level. Now with the evolution of the NanoVNA you can literally take the device up the tower to the antenna in question. As a Field instrument the NanoVNA is a vast improvement which I see improving over time and becoming a much have in the Ham Shack as an indispensable tool. the capabilities of the NanoVNA will open doors which other wise were purely the domain of the skilled mathematician. Using the NanoVNA is literal proof of "Seeing Is Believing" type of device.

Hi All,

In the post title it says "what am I missing ?". Well, I now know what I missed - tapping the "Done" key when calibrating !

I am so used to calibrating my DG8SAQ and Sark 110 VNA's that I thought the NanoVNA worked the same. It would seem that, with those VNA's, exiting the calibration routine screen automatically applies the cal. Not so with the NanoVNA.

Observing that the load resistor was not measuring 50 ohms after what I thought was a correct calibration gave the clue - DUH !

Many thanks to those who gave their help.

73 Stewart G3RXQ

YouTube is your best friend!

Matthew
KD6KVH

It is a very powerful and useful device despite its size and cost. I have
used mine for many purposes including using the TDR function recently to
troubleshoot a feed line/antenna problem of a local FM station. I am also
using it to get an antenna system going for the 630 meter band. I myself
have never felt the need to connect mine to a computer. I just read what it
displays and write down any numbers I need.

On Sat, Mar 8, 2025, 8:07 PM Ryan Trullinger (KC0QNB) via groups.io
<rt83021@...> wrote:

I got my first Nano VNA yesterday, a friend who used to live 10 miles
away, now lives 1000 miles away bought it for me along with jumpers and
adapters. Today I set up "presets" for 80, 40, 20, and 2 meters.
I researched a bit and found out it could be a small SD card, all I had
was some 64-gig and one 16-gig card, well the 64 failed but I did manage to
format the 16 to fat32 and that just got finished can see this device is
going to be very handy, and a bit of a challenge, but that is OK. I have
always believed that learning is a lifelong experience, and if you stop
learning you stop living.
As I try to learn more about this thing, I am sure I will be visiting this
page frequently.

I got my first Nano VNA yesterday, a friend who used to live 10 miles away, now lives 1000 miles away bought it for me along with jumpers and adapters. Today I set up "presets" for 80, 40, 20, and 2 meters.
I researched a bit and found out it could be a small SD card, all I had was some 64-gig and one 16-gig card, well the 64 failed but I did manage to format the 16 to fat32 and that just got finished can see this device is going to be very handy, and a bit of a challenge, but that is OK. I have always believed that learning is a lifelong experience, and if you stop learning you stop living.
As I try to learn more about this thing, I am sure I will be visiting this page frequently.

QUOTE: You will do far better to connect the right most antenna and
collapse it

toa 1/4-wavelength at 433 MHz

Why do you say that ? Can't find the extensible antenna anyway.

***

Because the other two antennas shown in the image will not work well if at
all on 433 MHz.

The extendable antenna in the right-most antenna in the image.

Dave - W?LEV




On Sat, Mar 8, 2025 at 12:39?AM Roger Need via groups.io <sailtamarack=
[email protected]> wrote:

On Thu, Mar 6, 2025 at 03:38 PM, kellogs wrote:

You will do far better to connect the right most antenna and collapse

it

toa 1/4-wavelength at 433 MH

Why do you say that ? Can't find the extensible antenna anyway.

Because the antenna that is center loaded with a coil will have less gain
than a 1/4 wave marconi antenna.

--

*Dave - W?LEV*


--
Dave - W?LEV

Hi
What Smith measurements given with the reference load, the short circuit and open terminaison ??? It can help to better understand what can be the issue
73s Nizar

Hi Donald,

Thanks for that, it was pretty much what I was expecting, and ties in with what I am getting with my DG8SAQ VNA. I am also using a silver mica capacitor with about the same lead lengths. Also when using a a Sark 110 VNA I am able to get sensible readings. To get 11 ohms resistive just doesn't make any sense, and I am beginning to suspect that I have a defective NanoVNA.

Thanks for the info.

73 Stewart G3RXQ