Re: Couple problems with NanoVNA H?
Thanks KD8CDG. It is just an exchange at AMZ. Nanovna.com says if buying from AMZ besure AURSINC, which is where I got it.
|
Re: Couple problems with NanoVNA H?
When you get your refund go here, buy this one...
|
|
|
I find that plotting unwrapped phase (not restricted to +/- 180 degrees) can provide insight that conventional phase plots cannot. For one thing, it lets you judge group delay at a glance without generating a separate curve. It also makes high-order resonances stand out. I've attached two examples from a NanoVNA-H4 ground probe measurement. I don't know of any VNA software that unwraps phase, but it's not hard to implement.
Brian
|
Re: Nano VNA SAVER graphs of a 40m loop antenna
Thanks, Barry! that's a great image. Did you make it with just 'Saver' or did you also use a graphics editing program too? I would really like to be able to make my charts look like yours. The highlighting of the actual ham band area is particularly nice.
--
Doug, K8RFT
|
Re: Couple problems with NanoVNA H?
Thanks to both of you. I got it off AMZ. It is about 2 weeks old, will return.
|
Re: Nano VNA SAVER graphs of a 40m loop antenna
Barry, Try this if you can. I had an 80m Vertical loop (Delta, point down) that I had a blast with (converted to a 5/8 wave inverted L for top band and then lost the limb in a storm). My local pattern was shaped tike a potato. Gave me the continental US and Alberta + Mexico City. I am trying to find another Tree to try again! I have a top band loop up now that was ALMOST as good as my L, but harder to tune time wise. I hope you have a couple trees to try this idea out on, I used an old window sash weight to make the point and fed about 1/3 the way down one side. An experiment I really miss.
ac0yw Dave
south central Mo.
|
Re: Couple problems with NanoVNA H?
Definitely not normal. Should not get hot, just barely warm at most. And the battery should last a few hours in full-up use. So you have something faulty, unless of course you are using this outdoors in very hot weather. Try opening the case and running it for awhile and see if one of the particular chips gets hot, or if it is just the battery. On Sat, Aug 12, 2023, 2:21 PM Dragan Milivojevic <d.milivojevic@...> wrote: Not normal, open it and find the source of the heat.
On Sat, 12 Aug 2023 at 23:19, <todivefor@...> wrote:
I am very new to this NanonVNA, so I don't rule out user error. I'm
trying to determine if the operation of my device is normal or defective.
It seems to me that it runs warm. With use it heats up very quickly, and
the battery seems to drain pretty fast. I can pretty much drain the battery
in an hour with off and on use.
Yesterday, I was testing a 2M and 70CM dipole I built just trying to
learn the basics of antenna building. After testing for awhile, my sweeps
no longer made sense compared to my original testing a couple days earlier.
I had installed NanoVNA-Saver and it's sweeps matched nothing. Either my
NanoVNA and/or NanoVNA-Saver was broken or I was doing something wrong.
This morning, I recalibrated both NanoVNA and NanoVNA-Saver. My sweeps
seemed much better. After about an hour, device was warm, battery was over
2/3 drained, and my sweeps looked terrible. This made we wonder if this was
the cause of my bad sweeps. I let it sit for awhile recharging and then
repeated my sweeps. They returned to what I would expect. Is this normal or
do I have a defective device? I've attached my calibration procedure and
NanoVNA specs.
Peter
WB3IZU
|
Re: Couple problems with NanoVNA H?
Not normal, open it and find the source of the heat.
toggle quoted message
Show quoted text
On Sat, 12 Aug 2023 at 23:19, <todivefor@...> wrote:
I am very new to this NanonVNA, so I don't rule out user error. I'm trying to determine if the operation of my device is normal or defective. It seems to me that it runs warm. With use it heats up very quickly, and the battery seems to drain pretty fast. I can pretty much drain the battery in an hour with off and on use.
Yesterday, I was testing a 2M and 70CM dipole I built just trying to learn the basics of antenna building. After testing for awhile, my sweeps no longer made sense compared to my original testing a couple days earlier. I had installed NanoVNA-Saver and it's sweeps matched nothing. Either my NanoVNA and/or NanoVNA-Saver was broken or I was doing something wrong. This morning, I recalibrated both NanoVNA and NanoVNA-Saver. My sweeps seemed much better. After about an hour, device was warm, battery was over 2/3 drained, and my sweeps looked terrible. This made we wonder if this was the cause of my bad sweeps. I let it sit for awhile recharging and then repeated my sweeps. They returned to what I would expect. Is this normal or do I have a defective device? I've attached my calibration procedure and NanoVNA specs.
Peter
WB3IZU
|
Couple problems with NanoVNA H?
I am very new to this NanonVNA, so I don't rule out user error. I'm trying to determine if the operation of my device is normal or defective. It seems to me that it runs warm. With use it heats up very quickly, and the battery seems to drain pretty fast. I can pretty much drain the battery in an hour with off and on use.
Yesterday, I was testing a 2M and 70CM dipole I built just trying to learn the basics of antenna building. After testing for awhile, my sweeps no longer made sense compared to my original testing a couple days earlier. I had installed NanoVNA-Saver and it's sweeps matched nothing. Either my NanoVNA and/or NanoVNA-Saver was broken or I was doing something wrong. This morning, I recalibrated both NanoVNA and NanoVNA-Saver. My sweeps seemed much better. After about an hour, device was warm, battery was over 2/3 drained, and my sweeps looked terrible. This made we wonder if this was the cause of my bad sweeps. I let it sit for awhile recharging and then repeated my sweeps. They returned to what I would expect. Is this normal or do I have a defective device? I've attached my calibration procedure and NanoVNA specs.
Peter
WB3IZU
|
Re: dfu_util command line for updating firmware please ?
On Sat, Aug 12, 2023 at 05:20 PM, <btomek@...> wrote:
These params work for me:
for dfu file:
dfu-util -a 0 -D filename.dfu
for bin file:
dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D filename.bin
Dzi?ki ;-)
|
Re: Nano VNA SAVER graphs of a 40m loop antenna
Thank you Barry.
Good info to know.
|
Re: Nano VNA SAVER graphs of a 40m loop antenna
I too did a 40m loop to test the NVIS on 40m. Always negative result. In both directions I lost 10 dB compared to my trapdoor doublet. On the other hand I put an L adapter to work on 20 m and there, surprise, certain connections gain 6-8 dB compared to the doublet. Probably a matter of radiation pattern and starting angle
73
--
F1AMM
Fran?ois
|
Re: Nano VNA SAVER graphs of a 40m loop antenna
It is about 20 ft high and in a ¡°delta¡± shape, horizontal of course.
Fed with a 1:1 balun (I did not need) and 50 ft RG213
I thought I needed a 4:1 balun or a 1/4 wave 75 ohm matching line, but I did neither and it works well.
The SWR is quite usable over the lower parts of 40/20/10m but I only use it on 40m.
It does just about as well as a simple 1/2 wave dipole at the same height.
My vertical works much better at night, for low-angle DX.
de k3eui
|
Re: dfu_util command line for updating firmware please ?
All fine and dandy, but non-applicable on the Linux system the OP was asking about. There, you get either the CLI he is asking ahout, or the ST Cube programmer.
toggle quoted message
Show quoted text
On August 12, 2023 12:24:53 PM EDT, John Barnett K5GYU <john.barnett@...> wrote: Andy,
Don't know if this will help but these info below is what I used to update my firmware in my NanoVNA-H4.
NanoVNA H / H4 Firmware
Now you have to download the firmware. You can find it on Github under the following Link DiSLord NanoVNA: DiSLord NanoVNA-H4 Firmware
Make sure to select the correct version, depending on whether you have the H or H4 variant. The wrong firmware makes the device unusable for the time being. You can still write the firmware directly on the chip, but you will need the appropriate hardware.
At the time of this post, version 1.0.64 was current. Here you need to download the file with the extension .dfu:
NanoVNA H / H4 in DFU mode and install driver
1. First, the NanoVNA H4 must be set to DFU mode: To do this, press the joystick in the middle and switch on the device. The screen should now remain black.
2. With the NanoVNA H, the DFU mode is started via the Config Menu.
3. Now the NanoVNA H4 can be connected to the computer via USB. Probably the USB driver is missing in the Device Manager.
4. Then the driver must be installed in the device manager from the DFU installation path via the device manager. You can find it here: C:\Program Files (x86)\STMicroelectronics\Software\DfuSe v3.0.6\Bin\Driver\Win10
5. Now DfuSeDemo can be started from the start menu.
Firmware Flash with DfuSE
In the DfuSE, the lower ¡°Choose Button¡± must then be clicked:
Now the just downloaded firmware file can be selected:
John
John Barnett, Jr. P.E. - 37424
Wireless Communication Systems - F1866
Cell: 903-399-4804
email: john.barnett@...
Web Site: www.wirelesscommsys.com
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Andy Foad via groups.io
Sent: Saturday, August 12, 2023 10:01 AM
To: [email protected]
Subject: [nanovna-users] dfu_util command line for updating firmware please ?
Folks..
I have an ancient NanoVNA, 0-900Mhz, sandwich board type.
I have dfu_util already on my Linux PC and working.
I have a bunch of .dfu files (NOT .BIN) that I'd like to experiment with.
All I need now is the dfu_util command line params, can any one help ?
Thanks.
73 de Andy
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
|
Re: dfu_util command line for updating firmware please ?
Andy,
Don't know if this will help but these info below is what I used to update my firmware in my NanoVNA-H4.
NanoVNA H / H4 Firmware
Now you have to download the firmware. You can find it on Github under the following Link DiSLord NanoVNA: DiSLord NanoVNA-H4 Firmware
Make sure to select the correct version, depending on whether you have the H or H4 variant. The wrong firmware makes the device unusable for the time being. You can still write the firmware directly on the chip, but you will need the appropriate hardware.
At the time of this post, version 1.0.64 was current. Here you need to download the file with the extension .dfu:
NanoVNA H / H4 in DFU mode and install driver
1. First, the NanoVNA H4 must be set to DFU mode: To do this, press the joystick in the middle and switch on the device. The screen should now remain black.
2. With the NanoVNA H, the DFU mode is started via the Config Menu.
3. Now the NanoVNA H4 can be connected to the computer via USB. Probably the USB driver is missing in the Device Manager.
4. Then the driver must be installed in the device manager from the DFU installation path via the device manager. You can find it here: C:\Program Files (x86)\STMicroelectronics\Software\DfuSe v3.0.6\Bin\Driver\Win10
5. Now DfuSeDemo can be started from the start menu.
Firmware Flash with DfuSE
In the DfuSE, the lower ¡°Choose Button¡± must then be clicked:
Now the just downloaded firmware file can be selected:
John
John Barnett, Jr. P.E. - 37424
Wireless Communication Systems - F1866
Cell: 903-399-4804
email: john.barnett@...
Web Site: www.wirelesscommsys.com
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Andy Foad via groups.io Sent: Saturday, August 12, 2023 10:01 AM To: [email protected]Subject: [nanovna-users] dfu_util command line for updating firmware please ? Folks.. I have an ancient NanoVNA, 0-900Mhz, sandwich board type. I have dfu_util already on my Linux PC and working. I have a bunch of .dfu files (NOT .BIN) that I'd like to experiment with. All I need now is the dfu_util command line params, can any one help ? Thanks. 73 de Andy
|
Re: dfu_util command line for updating firmware please ?
These params work for me:
for dfu file:
dfu-util -a 0 -D filename.dfu
for bin file:
dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D filename.bin
|
dfu_util command line for updating firmware please ?
Folks..
I have an ancient NanoVNA, 0-900Mhz, sandwich board type.
I have dfu_util already on my Linux PC and working.
I have a bunch of .dfu files (NOT .BIN) that I'd like to experiment with.
All I need now is the dfu_util command line params, can any one help ?
Thanks.
73 de Andy
|
Re: Best Way to Measure Antenna SWR
Hi Mark, thanks for all your comments. This antenna has been up for several years now and I have addressed most of the points you covered. The wire is hard drawn so no stretching.
I made no attempt to compensate for the VSWR on the higher bands as my TX has an internal tuner. I'm aware it doesn't give the best efficiency but if you look at the QSO map on my QRZ page you will see that it performs remarkably well on all the bands.
--
Mike G8GYW
|
Re: The ultimate nanoVNA-H4 case?
There are some great ideas here.
I have both the tinySA Ultra and the NanoVNA H4.. but add in a Hioki Analog 3030 VOM, and a owon hds2102s oscilloscope, the fluke and such, I'm still working an approach using a larger satchel with a collection of the half-hard/half-soft cases in colors. My biggest problem has always been getting the complete set of standard (furnished accessories) back in the right storage container. I use a fine and a medium tip white marker to put identification on cables and parts. VNA and SA has worked well, but those VNA calibration pieces are still looking for a place to run and hide each time I use them. I have a nice fish tackle box with drawers and lift-outs for my spare connectors (power, vhf/uhf/hf etc, gas soldering iron)
.
I am still using the original boxes for my various test units first listed, putting all of them in a larger box. (usually the next larger size from an Amazon delivery.)
|
Dentron
Barry K3EUI
John Barnett K5GYU
Glenn, KG7IL