开云体育

To use MY NanoVNA with MY Samsung Orbit J3 android phone, I needed this usb otg adapter:
(Male) to USB 2.0 (Female) Adapter, On-The-Go (OTG) Convertor Cable, 3-Pack, Black $7.98 (free shipping with order over $75); ASIN B00YOX4JU6
Item model number R-1170-ADAPTER-USB-MUSB-OTG-3x

That makes it possible to connect the usb 'C' cable that came with NanoVNA to a common usb-A to a usb A-male to micro male cable. That common cable is available from Dollar Tree stores, for - - - - - one dollar! They also carry the newer usb-A male to usb-C male cables, in case you need a spare or backup cable.

The situation for my Galaxy Tab A was slightly different because the tablet has a usb-C connector, not the older Micro connector.

I don't understand why there is this concern when it comes to downloading a program from the manufacturer and maker. In exchange, you only require a simple registration. There is another solution if you use google and type the name of the program and then download it from anywhere.
Then don't complain if you have posted a virus that this program is bad. Because your program is not bad, but your PC is defective.

This firmware update is interesting as it is about the current state.
I've already seen an image that installed 0.7.1-2-g5a10105.

On Fri, 20 Mar 2020 19:56:10 -0700, you wrote:

edy555 has released firmware version 0.7.1-20200321 for the NanoVNA. No major changes from version 0.7.0:

Contributions from @DiSlord
- shrink flash size
- faster sweep
- added color command

Added lever operation for the electrical delay (electrical delay value can be changed using jog switch after setting with keyboard)

edy555's firmware releases are only for the 2.8" NanoVNA's but usually make it to future firmware releases for the NanoVNA-H4 and NanoVNA-F. He does not release his firmware in DFU format, so on windows you have to convert the HEX firmware file to DFU format using the STM Dfu file-manger app.

- Herb

Am runnig in circles around the ST software page.
No DFUSE there, but lots of CONFUSION.
They are sending me a confirmation email, which immediately returns me
back to the confirmation email request page.

I have seen that 30 years ago at the start of the Inet,
but ST still has the Olde Way.

No way to get the software without goin' through a tedious
registration procedure.

OE8UWW

On Sat, Mar 21, 2020 at 04:51 AM, Ron WZ1V wrote:

Where do we go to download edy555 latest?
==========================================================

Ron, see Gyula's earlier reply.

NanoVNA user's will want to book mark edy555's GitHub page at

It looks like edy555 decided not to include DiSlord's averaging (bandwidth) firmware option to the 0.7.1 release. Probably decided its not ready for prime-time.

- Herb

On Sat, Mar 21, 2020 at 12:51 PM, Ron WZ1V wrote:

Herb: Don't see it in the files section.
Where do we go to download edy555 latest?

Instead of Herb, I reply: by clicking on the blue underlined word in the pdf file you will follow the link from where you can download it.

73, Gyula HA3HZ

Herb: Don't see it in the files section.
Where do we go to download edy555 latest?

Hi Luc,

This TDR issue is quite interesting, may be beyond the initial topic, hi !

As for many of us we spend currently most of time at home, I have decided to check for TDR what is really provided by nanoVNA-saver, nanoVNAsharp softwares and stand-alone NanoVNA (see the three enclosed pictures).

For doing the test, I have considered a 2 meters coaxial cable with a velocity factor of 0,7 (PTFE), and a frequency interval between [50 kHz -900 MHz] for the measurement.

The resulting Frequency Step is (900-0.05)e06/100 = 8,9995 MHz. I have seen several times the same error where divider is 101 and not 100. In fact (n) points provide (n-1) intervals which are the samething as the frequency step. This can be easily checked in the sweep control window of nanoVNA-saver. This error is unfortunately also found in the web page

The derivated Time Step is 1/(8,9995e06) = 111 ns.


1. nanoVNAsharp use case

For nanoVNAsharp we see that this 111 ns value is used as upper delay limit for the graph. Returned delay value is about 19 ns. Path length is 19e-09*3e08*0,7 = 3,99 m. Clearly the delay value must be divided by 2 to get the real cable length (round trip situation).


2. nanoVNA-saver use case

From another interesting document written by Gunthard Kraus DG8GB (presentation v1.6, page 66), we learn that for nanoVNA-saver, the upper delay limit for the graph is set at [(Time Step)/4]. For the 111 ns Time Step value, it means the upper delay limit could be around 28 ns. If we translate this value in path length we get : 28e-09*3e08*0,7 = 5,88 m. It is quite relevant with what we see on the graph (5,80 m). It also shows that the time to the open end from the S11 values seems to be the right way for length calculation. Even if delay value is not displayed, it is clear that there is no additionnal 2 divider factor.


3. NanoVNA stand-alone

It is the same situation that for nanoVNAsharp. The returned delay value is 19 ns, and from this value the path length must be divided by 2. However the NanoVNA does automatically this calculation for getting the right length for the cable. If the user wants to build a delay line, he must pay attention to this delay value in order to do the correction. About the upper limit for the displayed delay (stop value), I have not found informations about its management. It is probably something which is cleary put in source code, but I have no skill in this field ! So if anyone could explain this point, it could be useful.


73 - Jean-Roger / F6EGK

if you are following this path, please also read this description:
/g/nanovna-users/files/Hardware%20Mods/NanoVNA%20new%203.2%20LCD%20display%20Herman%20ON1BES.pdf

Hi Robin,

The connectors on the LCD may be broken. In another forum, I saw a similar case where the wires broke because the glass was probably not glued to the pcb, so the movement caused a break in the wires.
As I know it, this LCD can be a replacement, please identify the connections before ordering.

Successful problem solving.
73, Gyula HA3HZ

I use iPhone 5s battery (1560mAh), remove protection board from

Any 3.5-4mm battery can put in NanoVNA-H case

On Fri, Mar 20, 2020 at 05:33 PM, <david@...> wrote:

Hi all.

I just got a new NanoVNA-H4 from GigaParts. It wasn't sealed so that is a red
flag to me. However, everything is there. When I turn it on I see the intro
screen for about 10 seconds and then it changes to a smith chart. When I
touch it a menu comes up on the right but I cannot select anything. I can
press on the smith chart and it goes away or reappears but that is all I can
seem to do. Any ideas? I have tried my finger and the pick they sent.

Thanks. David

Hi David,
the solution can be found here:
/g/nanovna-users/message/11685

73, Gyula HA3HZ

On Sat, Mar 21, 2020 at 08:40 AM, johncharlesgord wrote:

It looks like the hex file in the zip collection is the new version, but the
bin file is the 0.7.0 version!
--John Gord

Hi John,

It cannot be the same because there are differences in size.
Previous edy555 versions and their contact details are in the pdf below.
Important: Only available for 2.8 "nanoVNA versions.

73, Gyula HA3HZ

Many 50 Ohm loads are made with two 100 Ohm smd resistors in parallel. I've seen many loads fail after intensive use, all the sudden they are 100 Ohm when connected. Unconnected 50 Ohm. We solved it by using male/female adapters, so the loads will never be disconnected. By the way, there are adapter without internal thread (male side), you just push them over a female connector. We use the loads in the final product test of RFID readers.
But for calibration of a VNA, I'd use a good quality load without an adapter. Currently I use the cal kit supplied by sdr-kits, based on Rosenberger connectors. They also sell kits based on Amphenol connectors, these loads are junk and will become 100R soon. Never had a problem with the Rosenberger load. Also the load from minicircuits is excellent (ANNEQ-50X+)


Op 21-3-2020 om 05:46 schreef Hernán Freschi:

Hi Tor,Tank you so much!Vy 73 de Gianni IW4ARDInviato da smartphone Samsung Galaxy.
-------- Messaggio originale --------Da: Torbj?rn Toreson <torbjorn.toreson@...> Data: 20/03/20 23:47 (GMT+01:00) A: [email protected] Oggetto: Re: [nanovna-users] Battery for nanoVNA Hello Gianni,For my 2,8” NanoVNA I bought a 3,7 V 750 mAh LiPo battery from Electrokit. It is larger than the original battery but thin enough to be placed sticking over some of the components. As you can see on the pictures I have washers to give some extra room. Works very good. Product number at Electrokit is 41016063, the price was about 10 Euro (about the same in USD). The reason to exchange the original battery was that it started swelling and that it was nice to have a larger capacity.73/ Torbjorn, SM6AYM> 19 mars 2020 kl. 19:32 skrev Gianni Matteini <iw4ard@...>:> > Hi to all,> I have buy nanoVNA without battery, anyone can help me for buy battery on Europe.> Vy 73 Gianni, IW4ARD> > >

It looks like the hex file in the zip collection is the new version, but the bin file is the 0.7.0 version!
--John Gord

I found the problem. My 50 ohm load was OPEN. I don't know if it can be opened to solder something inside. But tapping it on the table made it work again.

So weird.

edy555 has released firmware version 0.7.1-20200321 for the NanoVNA. No major changes from version 0.7.0:

Contributions from @DiSlord
- shrink flash size
- faster sweep
- added color command

Added lever operation for the electrical delay (electrical delay value can be changed using jog switch after setting with keyboard)

edy555's firmware releases are only for the 2.8" NanoVNA's but usually make it to future firmware releases for the NanoVNA-H4 and NanoVNA-F. He does not release his firmware in DFU format, so on windows you have to convert the HEX firmware file to DFU format using the STM Dfu file-manger app.

- Herb

Hello Gianni,

For my 2,8” NanoVNA I bought a 3,7 V 750 mAh LiPo battery from Electrokit. It is larger than the original battery but thin enough to be placed sticking over some of the components. As you can see on the pictures I have washers to give some extra room. Works very good. Product number at Electrokit is 41016063, the price was about 10 Euro (about the same in USD). The reason to exchange the original battery was that it started swelling and that it was nice to have a larger capacity.

73/ Torbjorn, SM6AYM

Perfect, thank you

--
Regards,
Chris

Hi all,
Mine just left China... " CNNKGD,China, International item has left originating country and is en route to Canada ".

I have few antenna to construct before summer... hope I get it in time.

Have a good one all.

Richard.