Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- Nanovna-Users
- Messages
Search
|
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
Even before the Chinese New Year, I cold not get my order paid. The
toggle quoted message
Show quoted text
'error' message, rejection of my credit card, reflected they would accept only a back transfer and displayed the instructions. I really don't care for this type of financial transaction. I have no problem with AliExpress, just Alibaba. But the only place you can be sure you are not paying for a clone is from Alibaba. Grrrrrrr...rrr....rrr. I've emailed Dave - W?LEV On Mon, Jan 20, 2020 at 7:42 PM n2msqrp <mstangelo@...> wrote:
When I purchaed the nanaVNA-H4 I logged into the Alibaba website and send --
*Dave - W?LEV* *Just Let Darwin Work* *Just Think* |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob,
toggle quoted message
Show quoted text
Your unit that had the USB connector come off - was that a micro-USB or a USB-C part? Thanks,Larry? -? not Mike ;-) On Monday, January 20, 2020, 1:38:51 p.m. GMT-5, Bob Albert via Groups.Io <bob91343@...> wrote:
Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:38:13 AM PST, Bob Albert <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:31:32 AM PST, Bob Albert via Groups.Io <bob91343@...> wrote: ? Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp <mstangelo@...> wrote: Bryan, Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
|
|
Re: We started selling nanoVNA-H4 using STM32F303CCT6 and 4-inch LCD
When I purchaed the nanaVNA-H4 I logged into the Alibaba website and send her a message requesting information about purchasing via paypal. That is how I got the instructions.
toggle quoted message
Show quoted text
As others have mentioned it is Chinese New Year and they may be closed. Mike N2MS On January 20, 2020 at 10:14 AM "tom verra via Groups.Io" <mnv73@...> wrote: |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob,
toggle quoted message
Show quoted text
I think you are mixing messages but I just purchased the NanoVNA-H-4 with the 4 inch screen. If you're considering another I would get this unit. Mike N2MS
|
|
Re: Improving the performance of a pre-V3.4 original Hugen nanoVNA
I'm very sorry, a typo, the TX (CH0) is not that bad, I measured and found while symulating 58.82 Ohms, *NOT 68.82 Ohms.
toggle quoted message
Show quoted text
* *Jos * Op 20-1-2020 om 15:49 schreef hugen@...: On Mon, Jan 20, 2020 at 09:24 PM, hwalker wrote:A similar discussion in Japanese (use Google translate or similar)I checked the content of this blog and some of the issues mentioned come from the wrong shield of the bad clone. Some modifications may not apply to a good NanoVNA. Our manufactured NanoVNA-H has good isolation.If you have better suggestions for improvements that can be feedback on github, we will try it and apply it to the next version of NanoVNA-H after verification, and send you the improved version to verify the modified effect. |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob Albert
Mike,
toggle quoted message
Show quoted text
Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob On Monday, January 20, 2020, 10:38:13 AM PST, Bob Albert <bob91343@...> wrote:
Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob On Monday, January 20, 2020, 10:31:32 AM PST, Bob Albert via Groups.Io <bob91343@...> wrote: Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp <mstangelo@...> wrote: Bryan, Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
|
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob Albert
Mike,
toggle quoted message
Show quoted text
Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob On Monday, January 20, 2020, 10:31:32 AM PST, Bob Albert via Groups.Io <bob91343@...> wrote:
Mike, Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob ? ? On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp <mstangelo@...> wrote: Bryan, Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
|
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob Albert
Mike,
toggle quoted message
Show quoted text
Thanks for the information.? I did not buy the device because I have a second nano that does okay.? But after reading your latest suggestion I guess I'll buy the thing and see if I can upgrade without bricking the unit.? It should also be a door to future upgrades.? Perhaps I can upgrade the second nano via its USB port but that unit is flaky and turns itself off without provocation.? It won't even turn on while the port is connected, and sometimes even when not connected it fails.? Once on, I can connect the port.? Then suddenly it behaves properly. I did have thoughts of replacing the USB connector but it takes ability that I lack.? I think over a dozen tightly spaced pins and limited access and tools. Bob On Monday, January 20, 2020, 10:13:05 AM PST, n2msqrp <mstangelo@...> wrote:
Bryan, Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
|
|
Re: We started selling nanoVNA-H4 using STM3
Ok. Thanks.
toggle quoted message
Show quoted text
On Mon, Jan 20, 2020 at 1:12 PM, Larry Rothman<nlroth@...> wrote: There is a link in the Wiki. On Monday, January 20, 2020, 1:11:19 p.m. GMT-5, Chris ODonnell via Groups.Io <redrider17747@...> wrote:
Can you post the instruction sheet(s) shown behind the unit in the photo? ? On Sun, Jan 19, 2020 at 10:45 PM, RFy<gpdxdveil@...> wrote:? How fast full sweep and how many sweep points on this variants? |
|
Re: Improving the performance of a pre-V3.4 original Hugen nanoVNA
Did you include the SA612 with power?
Using another vna I measured fairly accurate ch0 resistance with power on -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK |
|
Re: Improving the performance of a pre-V3.4 original Hugen nanoVNA
90%+ Isopropyl Alcohol on a cotton swab will make quick work of that flux.
toggle quoted message
Show quoted text
- Bill On 2020-01-20 11:41, Reinier Gerritsen wrote:
Hi Eric, |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bryan,
toggle quoted message
Show quoted text
Thanks. I thought it had to do with the mismatch between the coax and S11 port. I had a length of RG-6 handy and see the same effect with that 75 ohm cable and see the same effect. Since the loss of the Rg-6 is higher the step responses is decreasing at a faster rate. I have a 75 to 50 ohm pad. If I have time I may connect the pad to the S11 port, run a calibration using a 75 ohm load and run the test again. Mike N2MS
|
|
Re: Corrupted firmware.
Ok, so one last try with USBDeview. In the image you can see where I've highlighted a Port_#002.Hub, SMT32 Bootloader line. However, the very last line is what shows up when I reset and enable DFU on my nanoVNA. The serial number looks corrupted, does this mean that I must recover using the ST-Link v2 dongle? I think I saw where that is less than $2 USD on the Chinese website.
73, Brian |
|
Re: We started selling nanoVNA-H4 using STM3
There is a link in the Wiki.
toggle quoted message
Show quoted text
On Monday, January 20, 2020, 1:11:19 p.m. GMT-5, Chris ODonnell via Groups.Io <redrider17747@...> wrote:
Can you post the instruction sheet(s) shown behind the unit in the photo? ? On Sun, Jan 19, 2020 at 10:45 PM, RFy<gpdxdveil@...> wrote:? How fast full sweep and how many sweep points on this variants? |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob,
toggle quoted message
Show quoted text
Flash the latest firmware. TDR functionality has been part of most Nano firmware since mid Oct. I know your USB connector is pooched but did you ever buy the STM-Link device I gave you the link for? I've used it to test-flash my device in case the USB every screwed-up - and it works fine. ...Larry On Monday, January 20, 2020, 12:55:07 p.m. GMT-5, Bob Albert via Groups.Io <bob91343@...> wrote:
How can I add TDR capability to my early version of the nano? ? ? On Monday, January 20, 2020, 09:53:16 AM PST, n2msqrp <mstangelo@...> wrote: I've added a screenshot of the display to the Pictures Section Mike N2MS On January 20, 2020 at 11:08 AM n2msqrp <mstangelo@...> wrote: |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
Bob Albert
How can I add TDR capability to my early version of the nano?
toggle quoted message
Show quoted text
On Monday, January 20, 2020, 09:53:16 AM PST, n2msqrp <mstangelo@...> wrote:
I've added a screenshot of the display to the Pictures Section Mike N2MS On January 20, 2020 at 11:08 AM n2msqrp <mstangelo@...> wrote: |
|
Re: TDR Measurement with NanoVNA Saver
#nanovna-saver
#tdr
I've added a screenshot of the display to the Pictures Section
toggle quoted message
Show quoted text
Mike N2MS On January 20, 2020 at 11:08 AM n2msqrp <mstangelo@...> wrote: |
Gyula Molnar
Chris O
Brian Garber
to navigate to use esc to dismiss