Re: NanoVNA APP does not have New Coax Dislord Functions
Hi Nizar,
I think you are getting hung up on the wrong thing. Yes, without the corrections, the SWR value will be a little bit off, for instance if you use your 75ohm cable to match to a 75ohm load (a dipole), you may get an SWR reading of 1.6 instead of 1.0. With your 56ohm cable the difference would be minor.
But in all cases, the lowest SWR (the dip in the SWR curve) will appear at the same frequency - only the value of the SWR will change a bit - so you can always tune your antenna without doing any of these corrections. Just tune for the lowest SWR dip. And yes, as Roger correctly pointed out, the minimum SWR is not always at the resonant frequency, but it is close to resonance in almost all cases, so tuning for low SWR will give good antenna performance.
Just use the nanovna as you have it, and you will be able to tune some nice antennas. The difference between a 56ohm feedline and a 50ohm feedline will be insignificant for all simple antennas - it will only become relevant if you are doing phased arrays using the feedline. And using a 75 ohm feedline will also be insignificant in the tuning of most antennas. And the difference between an SWR of 1.5 and an SWR of 1.0 is insignificant - the station receiving your transmission will not be able to tell the difference.
So go out and tune some antennas and have fun on the air - the correction factors you are seeking are only a tiny part of the performance of your system, and in my experience, not worth spending time on. I never use them.
Stan KC7XE
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Jerry, I just checked my kernel 5.10.209. Just updated within a couple days. I installed the app on 12/8/24.
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Re: NanoVNA APP does not have New Coax Dislord Functions
The resonant frequency of an antenna and the frequency where the SWR is the minimum are different. Resonance occurs when the reactance X = 0 at the antenna feedpoint. When you measure the SWR at the transmitter end of the coax the SWR minimum will be at a slightly different frequency. The characteristics (impedance, loss) of the coaxial transmission line will determine by how much.
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Re: NanoVNA APP does not have New Coax Dislord Functions
Hi Stan
Thank you very much for clarification info about Nano-VNA App PC program, impedance conversion DiSlord function can be very usefull especially when using 75 Ohm coax's, indeed even my RG58 50 Ohm coax have around 57 Ohm measured impedance, so measurement of SWR with a 50 Ohm calibrated NanoVna will not be accurate enought to adjust antenna resonance, but coax impedance conversion function do the job and make it as easy as for perfect 50 Ohm coax cable.. SWR function measurement is altered if our coax does not have an accurate 50 Ohm impedance without using the DiSlord conversion function .
So My question : is there any other pc program that can include coax impedance conversion function to ensure an accurate SWR measurement and antenna resonance ??
73s Nizar
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Failed to download, or failed to install/run? (The store/download does not care about the kernel, nor does much software other than drivers).
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On December 26, 2024 1:52:23 PM CST, Jerry Stuckle <ai0k@...> wrote: `That's interesting, Peter. I couldn't get it on my Samsung S23 Ultra. My kernel version is 5.15.148 from December 3rd (it just updated itself recently. I wonder if that's the problem.
73,
Jerry, AI0K
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Sent from my Android device with K-9 Mail. Please excuse my brevity.
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`That's interesting, Peter. I couldn't get it on my Samsung S23 Ultra. My kernel version is 5.15.148 from December 3rd (it just updated itself recently. I wonder if that's the problem.
73,
Jerry, AI0K
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Re: NanoVNA APP does not have New Coax Dislord Functions
Nizar, the DiSlord measure functions are only in the nanovna firmware, they do not exist in nanovna-app. Nanovna-app uses the raw data from the nanovna and does all of its own calculations. So to use these functions, you will need to read them from the nanovna screen. You can show the nanovna screen on your computer using the little camera icon on the top line of the nanovna-app.
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NanoVNA APP does not have New Coax Dislord Functions
Hi all
Testing NanoVNA App + Windows11 with My New H4 , it seems almost working ok despite some bugs and crasching, but my main problem is : i do not found the new Dislord Coax functions, indeed i am using again this days the RG59 75Ohm coax it has less loss coeff then the RG58 50Ohm Coax measured by to the Dislord coax functions on H4, it has a measured 77.70 Ohm =Z0 specific impedance , and then i measure the SWR and Smith with 50-->77.7 Ohm Dislord conversion function, all seems amasing With H4, Wonderfull Dislord functions , but still no success to do it with NanoVNA App and PC+USB .
73's Nizar .
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I suspect it's a setting in the Google Play Store. I'm downloading it form the US store; perhaps the European store has a different setting.
Jerry, AI0K
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I have three Android phones, one with Android 14, one with 12 and a really old phone with 8. A Android Tablet running version 10. The StmDfuUsb app and the NanoVna web runs ok on all.
Just for info.
Clyde KC7BJE
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Installed recently on android 14 from Play Store. Galaxy S22 Ultra 5G.
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Loaded from the store, or an APK?
The store restrictions have nothing to do with the APK, they are separate.
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On December 24, 2024 4:16:09 PM CST, "Mike Willis via groups.io" <f1passenger@...> wrote: I'm using Android 14, I have had the App for years, and it works for me.
Mike Willis VE3FE
On Tue, Dec 24, 2024 at 12:27 PM Tim Dawson via groups.io <tadawson=
tpcsvc.com@groups.io> wrote:
Likely just a setting in the store, and nothing to do with the program
compatibility whatsoever.
On December 24, 2024 11:25:25 AM CST, "Greg Parsons via groups.io"
<ratgdh@...> wrote:
I am on 13 as well, strange. But I was sent a link to it and side loaded to
my tablet and is working fine now.
Greg
KE4OOO
On Tue, Dec 24, 2024, 11:58 Tim Dawson via groups.io <tadawson=
tpcsvc.com@groups.io> wrote:
Working here on Android 13, so that appears to be the cutoff.
On December 24, 2024 8:53:09 AM CST, Jerry Stuckle <ai0k@...> wrote:
I get the same message. Android 14.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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I'm using Android 14, I have had the App for years, and it works for me. Mike Willis VE3FE On Tue, Dec 24, 2024 at 12:27 PM Tim Dawson via groups.io <tadawson= tpcsvc.com@groups.io> wrote: Likely just a setting in the store, and nothing to do with the program
compatibility whatsoever.
On December 24, 2024 11:25:25 AM CST, "Greg Parsons via groups.io"
<ratgdh@...> wrote:
I am on 13 as well, strange. But I was sent a link to it and side loaded to
my tablet and is working fine now.
Greg
KE4OOO
On Tue, Dec 24, 2024, 11:58 Tim Dawson via groups.io <tadawson=
tpcsvc.com@groups.io> wrote:
Working here on Android 13, so that appears to be the cutoff.
On December 24, 2024 8:53:09 AM CST, Jerry Stuckle <ai0k@...> wrote:
I get the same message. Android 14.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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Likely just a setting in the store, and nothing to do with the program compatibility whatsoever.
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On December 24, 2024 11:25:25 AM CST, "Greg Parsons via groups.io" <ratgdh@...> wrote: I am on 13 as well, strange. But I was sent a link to it and side loaded to
my tablet and is working fine now.
Greg
KE4OOO
On Tue, Dec 24, 2024, 11:58 Tim Dawson via groups.io <tadawson=
tpcsvc.com@groups.io> wrote:
Working here on Android 13, so that appears to be the cutoff.
On December 24, 2024 8:53:09 AM CST, Jerry Stuckle <ai0k@...> wrote:
I get the same message. Android 14.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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I am on 13 as well, strange. But I was sent a link to it and side loaded to my tablet and is working fine now. Greg KE4OOO On Tue, Dec 24, 2024, 11:58 Tim Dawson via groups.io <tadawson= tpcsvc.com@groups.io> wrote: Working here on Android 13, so that appears to be the cutoff.
On December 24, 2024 8:53:09 AM CST, Jerry Stuckle <ai0k@...> wrote:
I get the same message. Android 14.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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Working here on Android 13, so that appears to be the cutoff.
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On December 24, 2024 8:53:09 AM CST, Jerry Stuckle <ai0k@...> wrote: I get the same message. Android 14.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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On Tuesday 24 December 2024 09:53:09 am Jerry Stuckle wrote: I get the same message. Android 14. And I don't, also Android 14... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
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I get the same message. Android 14.
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On Monday 23 December 2024 02:25:37 pm Greg Parsons via groups.io wrote: I too see the nanovna web app in the store, but it won't let me download it
as it tells me it is for an older device. My phone isn't all that old, maybe a year? Dunno what to tell you offhand... I've never run across that particular error condition, and I have a whole bunch of apps on there. On Mon, Dec 23, 2024, 11:12 Roy J. Tellason, Sr. via groups.io <roy=
rtellason.com@groups.io> wrote:
I have "NANOVNA Web App" showing up on my phone, got it in the google
play store... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
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Re: New Nano-VNA-H4 from SEESII User guide?
Matt. Good call! (and yes I bought two of them. ) Also handy is to find a couple of shielded longer cables ending in small alligator clips. Useful to connect to filters, etc. 73 Bill K2TNO On Mon, Dec 23, 2024, 4:47 PM Matthew Rapaport via groups.io <quineatal= gmail.com@groups.io> wrote: You also need 1 more little kit (about $15 on Amazon) with a 50 ohm load
stub and extra F-F barrel connector. The VNA only comes with 1 of each and
you need 2 for the LOAD calibration in order to do 2-port (S21) tests...
Search Amazon for "sma calibration kits" and you'll find it
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Roger Need
Clyde Lambert
Mike Willis
