开云体育

Our next Reddit Net on Brandmeister TG 98003 is going to be about the NanoVNA.

Full info here:

I'm sure we will have some complicated questions so it would be cool if some experts showed up. Hope to see you there!



--
KV0A - Robert

Hi Kurt,
I purchased the battery from a local market. Have a look.
The Tindie seller hasnt shipped the package yet. Meanwhile I shall keep all things ready.

--
Salil Tembe
(Nuclearrambo.com)

Thanks everybody for your feedback and recommendations.
Just ordered 2 sets H4 at Maggie's.

Jan PA3GSV

Hi Salil
Found one, however LiPo but I believe is will work as well as Li-ion



-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Salil Tembe
Sendt: 6. marts 2020 18:52
Til: [email protected]
Emne: Re: [nanovna-users] V2 Design #NanoVNA-V2

Its available on Tindie. Just order two from there instead of going through the SZ seller I was planning earlier.

--
Salil Tembe
(Nuclearrambo.com)

Hi Salil
I ordered one too, and are now searching for a Li-ion battery 1000-2000mAh max dimension 6x40x60mm preferably with JST-XH 2.54mm connector. Have you found any ?
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Salil Tembe
Sendt: 6. marts 2020 18:52
Til: [email protected]
Emne: Re: [nanovna-users] V2 Design #NanoVNA-V2

Its available on Tindie. Just order two from there instead of going through the SZ seller I was planning earlier.

--
Salil Tembe
(Nuclearrambo.com)

Both the original nanoVNA and the V2 fit perfect in the 100x60x25mm box you can find very cheap on eBay. Example: 5 for 4 Euro

My plastic manipulation skill are not perfect but the unit is well protected and at such a price per box its no problem if you destroy one.
Just make a hole in the click in cover and some holes in the side for USB and SMA. As there is no battery no need to expose the switch.

--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

On Sat, Mar 7, 2020 at 02:24 AM, David J Taylor wrote:

I would be very interested in a unit covering past 2.5 GHz, but for these
reasons, I'll wait on a more complete unit.

Same here. This isn't the device I was hoping for it to be.
--
John AE5X

Hi,

I tried rasberry zero wh with nanovna. No succes. I use Raspbian. Graphical user interface very slow, without nanovna. I try command line only mode and rtl_sdr tcp server. Extreme slow, simply not usable, I am disappointed. I try RPI to configure wifi ap mode + ser2net. Not easy way, no succes too. Hard very long manuals, with some not working commands.

See next email, I switch to Android with good succes.

73,
Lajos
===============================

Lajos,

The RPi Zero WH is the lowest powered, smallest memory unit in the range. 512 MB, single-core. If using a graphical interface, I would suggest the 3B+ or 4 as a much more suitable RPi.

I have also had problems with ser2net and similar software.

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

From: zl2arl


============================

More sweep points, excellent!

Greater frequency range, good but why no 10 kHz?

However, low cost has meant some sacrifices:

- small display, despite many requests that it be larger.

- no box, the unit is naked and rather delicate.

- micro USB rather than USB-C, so incompatible with all the other units.

- no battery!

- no SMA cables.


I would be very interested in a unit covering past 2.5 GHz, but for these reasons, I'll wait on a more complete unit.


David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Sadly, after I installed it, all I get is a badly twitching display. Can you tell who to turn to for fixing that ?

________________________________
From: [email protected] <[email protected]> on behalf of Roger Need via Groups.Io <sailtamarack@...>
Sent: March 6, 2020 6:11 PM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] Measuring Nano Inductance

On Fri, Mar 6, 2020 at 02:02 PM, Yahoo TNC wrote:

WOW !!!!! Thanks Roger. What a wonderful program !!! Never heard of it.

Check this group's Wiki for more information on this program (and lots of other NanoVNA material) . There is a getting started guide.

Roger

On Fri, Mar 6, 2020 at 02:02 PM, Yahoo TNC wrote:

WOW !!!!! Thanks Roger. What a wonderful program !!! Never heard of it.

Check this group's Wiki for more information on this program (and lots of other NanoVNA material) . There is a getting started guide.

Roger

WOW !!!!! Thanks Roger. What a wonderful program !!! Never heard of it.

________________________________
From: [email protected] <[email protected]> on behalf of Roger Need via Groups.Io <sailtamarack@...>
Sent: March 6, 2020 3:59 PM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] Measuring Nano Inductance

I suggest you use the PC program NanoVNA Saver because it has several different display panels. One is R+jX which will give you the Resistance (which will rise with frequency due to the skin effect) and X-Reactance. The other one to select is a display of Inductance vs Frequency which does the conversion from reactance to inductance for you.

For a 100 nH inductor you are probably using an air wound coil so you won't see that much change in inductance with frequency. However, inductors made with toroids will because the permeability of the core goes down with frequency.

Roger

I suggest you use the PC program NanoVNA Saver because it has several different display panels. One is R+jX which will give you the Resistance (which will rise with frequency due to the skin effect) and X-Reactance. The other one to select is a display of Inductance vs Frequency which does the conversion from reactance to inductance for you.

For a 100 nH inductor you are probably using an air wound coil so you won't see that much change in inductance with frequency. However, inductors made with toroids will because the permeability of the core goes down with frequency.

Roger

Hi,

Now, I have good succes Nanovna WIFI mode with Android phone (Samsung Xcover 3). Nanovna connected to phone with USB-OTG cable. This phone not new, Android 5.1.1. I use on phone TCPUART by hardcoded joy. On pc I use Trueport. Nanovna saver not detect automatically the Nanovna, but manual port settings works. Stable connection, vna works well. But Nanovna Saver device screenshot function always crash. I try with router works, I try without router and without mobile internet, Phone simply switch to hotspot mode. Works well too.

I not know how to contact Nanovna webapp developer. I think tcp serial data stream support easy upgrade.

73,
Lajos

Hi,

I tried rasberry zero wh with nanovna. No succes. I use Raspbian. Graphical user interface very slow, without nanovna. I try command line only mode and rtl_sdr tcp server. Extreme slow, simply not usable, I am disappointed. I try RPI to configure wifi ap mode + ser2net. Not easy way, no succes too. Hard very long manuals, with some not working commands.

See next email, I switch to Android with good succes.

73,
Lajos

First use the appropriate equation to solve for the diameter or number of turns etc for the desired coil. Toroid, solenoid...?

Then do a one port CH0 cal on your vna from 1 MHz to 100 MHz only. That is sufficient freq range to find the L value if you are close for 100 nH.

I would mount the L under test to a SMA female connector and solder the L under test to the center pin of that connector. Trying to keep the parasitic L
of the fixture to a min. Connect the SMA female and go measure CH0 using S11 Smith chart display.

You can knife the coil turns or compress to hit the desired L.

I have to wind a 100 nanoHenry inductor. Can anyone suggest a methodology for using my H4 to measure it ? I do have a 100 MHZ scope but not an RF generator for the intended 137 MHZ operation. Thanks.

Its available on Tindie. Just order two from there instead of going through the SZ seller I was planning earlier.

--
Salil Tembe
(Nuclearrambo.com)

Does performance depend on or require electrical contact from the adjustable supports?

--
I_B_Nbridgema