开云体育

Hi Larry,
I'm glad that many people have noticed what the original author wrote in the "Know issues" section of the NanoVNA alpha1 kit assembly manual.
I think the same way, thank you for trying to confirm that I'm not trying in vain.

73, Gyula

Downloaded the file and moved it to a different folder.
Apps nanovna-saver-v0.2.1.exe
Clicked on the file to run it. A window opened, a flashing cursor appeared briefly then the dialog box shown in the attached picture opened.

Environment:
HP EliteBook Folio 9470m running Windows 7 Professional SP-1

Any clues, ideas, etc...
--
Chuck, W5USJ

When I received my first nano a white gecko clone, the first thing I did was drop it with the dinky microusb cable plugged in. The entire usb connector pulled off and was basically destroyed.. So I did a cludgey fix. I took a scrap piece of PC board and made four islands on it using a Harbor Freight 3/8" spot welder cutter bit.(#63657). Th hen cut one end off an old type A USB cable.and attached one end to the scrap PC board and soldered the leads to the pads. Then I used a small gauge enameled wire and attached to the traces remaining from the old micrusb connector traces. This is the hard part. I cheated on the ground wire and attached it nearby as shown. After I was satisfied I covered the fragile connections in epoxy. The enameled wires are terminated on the other end on the appropriate pad. Its ugly but really pretty usable. Could be improved in a hundred ways. If you wanted you could probably fashion this into a PC board case. Your board could be different so double check where everything goes. I am just throwing out the general idea of how it might be done.

For everyone that wants to do complex transmission line analysis and has access to a sufficiently new MSOffice suite I suggest they use ZPlot, a free tool written in Excel
It can be downloaded from here

The excel file contains the calculation models for complex transmission line measurement calculation and compensation using a k0,k1,k2 model.
Using nanoVNA saver you can measure your antenna feedline with the antenna disconnected and replaced with a OPEN/SHORT
The resulting two touchstone files can be imported into ZPlot and ZPlot will calculate a full transmission line model (k0,k1,k2) for your antenna feed cable including the delay.
Then you measure your antenna connected to the feedline and import in ZPlot using the calculated transmission line model and have all the details of your antenna without the impact of the cable or you use the calculated delay in nanoVNA saver to quickly eliminate the biggest impact of the feedline
--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

Hi Paul,
I did ask you to clarify what the problem was, and what environment you're
running it on. Your description of the problem is in no way clear
enough for me to be able to answer it as it stands.

--
Rune / 5Q5R

is no one going to answer my question then?

Hi,
Starting from the end of November 2019, we(NanoVNA-F team) no longer produce RF Demo Kits with WWW.S*T.COM mark.

On Thu, Dec 5, 2019 at 04:15 PM, Gwen Patton wrote:

" … Maybe this will work better with NanoVNA-Web-Client. I don't know, I haven't tried it myself, but this is a way to keep the Chromebook useful..."

==================================================================================================
Gwen,
If you have a NanoVNA could you try running the NanoVNA-Web-Client under the GalliumOS and letting the group know if it works.

Tks,

-Herb

You have another option, Bob.

We have two older Chromebooks, the Acer 11.6" CB3-111-C8UB. They've long been out of updates, and we replaced them with a couple of newer Asus Flip Chromebooks that really work well. But what to do with the OLD ones? The CROUTON tool lets you sort of dual-boot it with a flavor of Ubuntu Linux, but I found that GalliumOS is much easier to install and use. You can do the dual boot thing if you want, or if you don't care if it still has the ChromeOS partition, you can just reflash the whole thing over to Linux using GalliumOS, a distro of Xubuntu, yet another Ubuntu derivative. It has a live version you can burn to a thumb drive and try out, and if you like it, you can update the firmware to support it as the sole OS on the machine, then do an install from that same thumb drive. It takes about 10 minutes to get everything all set up, then about another 20 minutes to half an hour for it to download and install everything.

GalliumOS supports a whole pile of ham radio programs, including WSJT-X and JS8Call, Qtel (an Echolink client), and a number of loggers of varying degrees of complexity. I got the latest version of JS8Call working with no trouble whatsoever. There's a whole suite of antenna design apps for it, and electronics tools like Fritzing, and you can install whatever browser you like that's available for Linux, such as Firefox. It comes with Chromium, but it's a far more up to date version than what the Chromebook itself had at this point.



Maybe this will work better with NanoVNA-Web-Client. I don't know, I haven't tried it myself, but this is a way to keep the Chromebook useful.

73,
Gwen, NG3P

Herb, no idea of the short.? In fact the removed connector seems to have disappeared.? If I could find it (I will) and figure out how to reattach it (I doubt that) I will have a perfect unit.? Oh well.? My best guess is a solder bridge under the plug but it looks okay with the plug gone.? If it were misaligned that could do it.
I found an old cellphone charging cable with an obsolete connector so cut that off and hard wired to the nano.? Then I plugged the USB into a 5V charger I had laying around and I am good to go.
I calibrated the nano and made some antenna measurements and now have two working units.? They agree with one another in impedance.
Only about 20 more projects to go.
I want to thank all for helping.? Larry Rothman gave me the exact point to use.
Bob On Thursday, December 5, 2019, 03:31:43 PM PST, hwalker <herbwalker2476@...> wrote:

Bob,
? Any idea what caused the short at the connector?? Usually the USB-C connectors are not easy to misalign so I was curious as to what you thought might have occurred.

- Herb

Dear GIN&PEZ;

The process you describe is the one I have been using, and it works just fine. It is just an annoying and unnecessary extra step in the printing process. I still have to walk over to my XYL’s office to get my copy from the printer. :-)

--
73

Gary, N3G

just tried to clone it from scratch and compile - compiled okay with no errors.

Clone and compile sequence is the following:

$ git clone
$ cd NanoVNA-Q/
$ git submodule update --init --recursive
$ make

Here is screenshot:

On Thu, Dec 5, 2019 at 11:29 PM, Lapo Pieri wrote:

Is there a sort of code configuration to issue before compiling?

You can comment lines 28-30 in the file nanovna.h to enable/disable support for scanraw and color command. It will reduce memory usage.

I just installed arm-none-eabi-gcc with apt-get install on my old Ubuntu machine and it can compile code from repository with no needs for any change.

Yeah, I just read an article that said Chromebooks all essentially have a built-in expiry date after which Google will no longer push out updates.?
The gist of the article was that if you're going to buy one, to take note of the date it was manufactured and not to purchase anything more than a few months old.?
Beware of old models being sold cheaply during all the current sales. They may not take updates for very long.?



On Thu, 5 Dec 2019 at 5:24 PM, GM4CID<gm4cid@...> wrote: Herb,

My Chromebook has reached an age where it no longer receives updates so it does not have the latest OS and will not work.
Thank you, time to stop trying and dig out a Windows laptop.

73 Bob GM4CID

Bob,
Any idea what caused the short at the connector? Usually the USB-C connectors are not easy to misalign so I was curious as to what you thought might have occurred.

- Herb

Nah, don't use a usb 5v wall wart.? Get one with a small barrel plug and stick a socket on the Nano. Check around your junk box for the parts.?



On Thu, 5 Dec 2019 at 5:36 PM, Bob Albert via Groups.Io<bob91343@...> wrote: Okay I tried it and it looks perfect.? I found a 7805 and will find a spot for it and energize this thing from a higher voltage.
However, the circuit seems to draw the better part of 1 Ampere so running it from 13 V would dissipate 8 Watts, too much for the little regulator.? So I have to ponder alternatives, either a pass transistor or just running it from a separate 5V source as you recommend.? There is no shortage of USB wall supplies although the proper connector is another story.
Bob

Good to know, Bob.?
I had suggested to the devs to use 2 LiPo s with a linear 5v Reg to run the unit in order to reduce RFI from that charger/inverter chip.?
Banggood has a 2S charging board for about $2 that you run off of an 8 to 12v source.? I'm going to look at that setup soon in addition to modding the bridge and freq source circuits per the discussion on Hugen's GitHub repo.?
CheersLarry



On Thu, 5 Dec 2019 at 5:03 PM, Bob Albert via Groups.Io<bob91343@...> wrote: Larry, that is exactly the information I was seeking.? Now I can restore 'normal' operation, less the data exchange.
I did connect 5V to the switch because 3.7 wasn't enough for the unit to run.? We shall see how it goes.
I do intend to use an external 7805 to run the unit from a 13V source, and have it sort of permanently attached to my ham station.? I still have the other one that works fine and it will do for portable uses.
Off to the workbench...
Bob

I personally have not tried to compile the code but it logical that if you remove most of the help text, you will free up code space.?
Maybe QRP could create a 'help-free' version to be used primarily with NanoVNA Saver and other PC apps so the freed-up space could be used for newer features??? :-)



On Thu, 5 Dec 2019 at 4:29 PM, Lapo Pieri<ik5nax@...> wrote: 01:10 Thu 05 Dec 19? , Larry Rothman wrote:

Well, if this is only for your own personal use, I would suggest you can begin removing all the help text and associated code, incuding the info text.??

I've to figure out how to remove that part of code

Afterall, you already know how to use the commands, right???

Is there a sort of code configuration to issue before compiling?

Thanks

Lapo

Okay I tried it and it looks perfect.? I found a 7805 and will find a spot for it and energize this thing from a higher voltage.
However, the circuit seems to draw the better part of 1 Ampere so running it from 13 V would dissipate 8 Watts, too much for the little regulator.? So I have to ponder alternatives, either a pass transistor or just running it from a separate 5V source as you recommend.? There is no shortage of USB wall supplies although the proper connector is another story.
Bob