Version 1.4 of the Android NanoVNA app is running fine on my Android 12 Motorola Edge+ so it may be your security settings.
I can't say anything about Android 13 as Motorola isn't moving my model to that release.
I assume you've tried to install from the Play store and not side-load it?
|
Re: compensating for internal Z's of NanoVNA
Hello all of you,
This compensation can of course also happen within eg NanoVNASaver (or
other NanoVNA utility that can do calibration)...
All the best,
Victor
Op wo 8 mrt 2023 om 11:20 schreef Victor Reijs <
pe1atn.victor.reijs@...>:
toggle quoted message
Show quoted text
Dear DiSlord,
As the impedances of the NanoVNA are not precisely 50ohm (they can even be
something like 43ohm), I was wondering if this could be compensated for
within your software?
I think that doing the normal calibration is able to handle such a
compensation.
I have documented my experiences with this here:
www.archaeocosmology.org/eng/S21S11.htm
But Owen Duffy has similar ideas: .
Thanks for considering and of course, if questions, let me know.
All the best,
Victor
--
73 de PE1ATN or NL413
|
Yeah, I read them all back in the day, wished I'd kept them but I worked for the government and after a bunch of moves, some things just had to be sacrificed. Hint, hint: make them into pdf files and we could all have a good laugh again. Unless you know of someone who already did that, I'd sure buy them.
Mike C. Sand Mtn GA
toggle quoted message
Show quoted text
On 3/13/2023 4:51 PM, Zack Widup wrote: I remember him! I probably have all those 73 issues still around. He wrote
a lot of great humorous articles.
Zack W9SZ
On Mon, Mar 13, 2023 at 2:18?PM Mike C.<mg@...> wrote:
Remember K1YSD, wish he was still around.
Mike C. Sand Mtn GA 1600 angles
34.831648, -85.567676
On 3/13/2023 1:26 PM, Lester Veenstra via groups.io wrote:
39.336826 N 78.982287 W
|
Re: bALUN Common mode reject Z measurement
You guys are close.
Back in the day we could say with certainly that someone must have shot the satellite.
I think with all the Baluny we just encountered too much common mode current
73
Ed McCann
AG6CX
|
I am trying to install the android app for the Nano-vna on my android devices, but it keeps saying that the app cannot be installed on my android version. I have 4 devices with Android 12 and 13, but I get the same message everywhere. What can I do?
|
I remember him! I probably have all those 73 issues still around. He wrote
a lot of great humorous articles.
Zack W9SZ
toggle quoted message
Show quoted text
On Mon, Mar 13, 2023 at 2:18?PM Mike C. <mg@...> wrote: Remember K1YSD, wish he was still around.
Mike C. Sand Mtn GA 1600 angles
34.831648, -85.567676
On 3/13/2023 1:26 PM, Lester Veenstra via groups.io wrote:
39.336826 N 78.982287 W
|
Remember K1YSD, wish he was still around.
Mike C. Sand Mtn GA? 1600 angles
34.831648, -85.567676
toggle quoted message
Show quoted text
On 3/13/2023 1:26 PM, Lester Veenstra via groups.io wrote: 39.336826 N 78.982287 W
|
Simplicity !!
Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1)
lester@...
452 Stable Ln
Keyser WV 26726 USA
GPS: 39.336826 N 78.982287 W (Google)
GPS: 39.33682 N 78.9823741 W (GPSDO)
Telephones:
Home: +1-304-289-6057
US cell +1-304-790-9192
Jamaica cell: +1-876-456-8898
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Roger Need via groups.io Sent: Monday, March 13, 2023 12:51 PM To: [email protected]Subject: Re: [nanovna-users] Through calibration On Sun, Mar 12, 2023 at 06:07 PM, Roger Need wrote: On Sun, Mar 12, 2023 at 06:07 PM, Roger Need wrote: Once you get above a few MHz. you have to be careful when measuring
capacitors, inductors and baluns if you want meaningful results.
Stray inductance and capacitance can make a big difference and you can
get resonance effects that are due to parasitics and not the component
itself. Attached is one example where a few pF of stray capacitance
from using an alligator clip test jig made an inductor look like it
was resonant when this was not the case. Another shows how the value
of a capacitor measurement is affected by an alligator clip test jig.
Comparisons were made to a fixed jig using properly spaced SOL with 50 ohm SMD.
Here is an easily constructed test jig that gives good results up to 50 MHz or so. It is useful for testing larger components. Roger
|
On Sun, Mar 12, 2023 at 06:07 PM, Roger Need wrote: On Sun, Mar 12, 2023 at 06:07 PM, Roger Need wrote: Once you get above a few MHz. you have to be careful when measuring
capacitors, inductors and baluns if you want meaningful results. Stray
inductance and capacitance can make a big difference and you can get resonance
effects that are due to parasitics and not the component itself. Attached is
one example where a few pF of stray capacitance from using an alligator clip
test jig made an inductor look like it was resonant when this was not the
case. Another shows how the value of a capacitor measurement is affected by
an alligator clip test jig. Comparisons were made to a fixed jig using
properly spaced SOL with 50 ohm SMD.
Here is an easily constructed test jig that gives good results up to 50 MHz or so. It is useful for testing larger components. Roger
|
Re: bALUN Common mode reject Z measurement
Yes. The uncontrolled reformatting......I didn't do that.....something
else did.... I don't have solid and continuous coverage from Starlink.
Possibly something between bursts of transmissions to the satellites? The
coverage is somewhat broken, but piecewise continuous, to use a math term.
Dave - W?LEV
toggle quoted message
Show quoted text
On Mon, Mar 13, 2023 at 2:51?PM DougVL <K8RFTradio@...> wrote: Maybe it's all the re-re-re-re-quoting, causing some "buffer overflow"
error.
(and all those blank lines, and ones with only one word.)
--
Doug, K8RFT
-- *Dave - W?LEV*
--
Dave - W?LEV
|
Re: bALUN Common mode reject Z measurement
Maybe it's all the re-re-re-re-quoting, causing some "buffer overflow" error.
(and all those blank lines, and ones with only one word.)
--
Doug, K8RFT
|
if it is good for a choke it can be used to feed a dipole ... not a real balun .. i know .. but a similar function ...
just wind one and measure with vna
if not superb to use on antenna they may be used to choke such things like telephone lines, printer or screen cables, rotor control lines .. whatever
so the only way for an unknown core is to just try them .. maybe wind a coil over them and measure it to compare with known mixes
dg9bfc sigi
Am 12.03.2023 um 00:23 schrieb N2MS:
toggle quoted message
Show quoted text
Bryan,
Those power supply ferrites are useful for low frequency power or choke applications but are not that useful for HF balun, unun or transformer applications. The unknown ferrites I find useful are those split ferrites placed on cables for RFI attenuation. Most are designed for VHF attenuation and are similar to the Fair-Rite 43 mix.
There is no standard color code. The colors are probably unique to the manufacturer.
Mike N2MS
On 03/11/2023 4:25 PM Bryan Curl <bc3910@...> wrote:
Thanks all. I just wasnt sure, for a thru cal where to place the Open Short and Load bits. Its pretty straight forward for using just S11 for reflected measurements.
Mike that's a great idea for identifying ferrites! I tore some out of an old PC power supply that were green, blue and black but have no idea what they are. Colors may or may not be an indication.
Thanks again everyone.
Bryan
|
Oh yes, David. Just like some amateur 5Kw stations, all mouth and no ears <vbg>
toggle quoted message
Show quoted text
On 13/03/2023 11:09, david bromell via groups.io wrote: Crocodiles? That's a polite name for them...
On Monday, 13 March 2023 at 11:02:45 GMT, mike <pencoys@...> wrote:
Actually, we do. But we call them Politicians... <vbg>
On 13/03/2023 10:58, mike via groups.io wrote:
Ian, I dont know where you are, but we dont have Crocodiles in the UK
either..
On 13/03/2023 08:34, Ian McCrum MI5AFL wrote:
In the UK we call them crocodile clips... we don't have alligators
here.... 8-)
|
Crocodiles? That's a polite name for them...
toggle quoted message
Show quoted text
On Monday, 13 March 2023 at 11:02:45 GMT, mike <pencoys@...> wrote: Actually, we do. But we call them Politicians... <vbg> On 13/03/2023 10:58, mike via groups.io wrote: Ian, I dont know where you are, but we dont have Crocodiles in the UK
either..
On 13/03/2023 08:34, Ian McCrum MI5AFL wrote:
In the UK we call them crocodile clips... we don't have alligators
here.... 8-)
|
Actually, we do. But we call them Politicians... <vbg>
toggle quoted message
Show quoted text
On 13/03/2023 10:58, mike via groups.io wrote: Ian, I dont know where you are, but we dont have Crocodiles in the UK either..
On 13/03/2023 08:34, Ian McCrum MI5AFL wrote:
In the UK we call them crocodile clips... we don't have alligators here.... 8-)
|
Ian, I dont know where you are, but we dont have Crocodiles in the UK either..
toggle quoted message
Show quoted text
On 13/03/2023 08:34, Ian McCrum MI5AFL wrote: In the UK we call them crocodile clips... we don't have alligators here.... 8-)
|
In the UK we call them crocodile clips... we don't have alligators here.... 8-)
|
They were (maybe still) great clips but once some folks got ahold of the design they lost the ability to grab. Even some of the allies are so cheesy that they have become useless.
John
KK4ITX
Visit: www.zaarc.org. ?
toggle quoted message
Show quoted text
On Mar 12, 2023, at 23:24, Sam Reaves <sam.reaves@...> wrote:
I knew a fellow named Dave Fahnestock whose grandfather or greatgrandfather
was the owner of Fahnestock Electric who IIRC owned the patent on those
clips.
Sam Reaves
ARS W3OHM
Owner / Moderator of:
LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io
Sprint Layout Group on Groups.io
Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
|
I knew a fellow named Dave Fahnestock whose grandfather or greatgrandfather
was the owner of Fahnestock Electric who IIRC owned the patent on those
clips.
Sam Reaves
ARS W3OHM
Owner / Moderator of:
LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io
Sprint Layout Group on Groups.io
Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
|
Hi John,
You mean the "worlds' largest sandbar"? Yeah, lived there too Jacksonville and Milton (near the race track) How about this:
Small Fahnestock Clip
Fahnestock clip top viewFahnestock clip top viewFahnestock clip top view
toggle quoted message
Show quoted text
On 3/12/2023 10:31 PM, KK4ITX John via groups.io wrote: I have lived in Florida for 20+ years....... believe me they are ALLIGATOR CLIPS if I ever saw one !
John
KK4ITX
Visit:www.zaarc.org. ?
On Mar 12, 2023, at 22:16, Mike C.<mg@...> wrote:
You mean one like this:
Small Fahnestock Clip
Fahnestock clip top viewFahnestock clip top viewFahnestock clip top view
Mike C. Sand Mtn GA
On 3/12/2023 8:25 PM, Don Rolph wrote:
Fahnstock clips
<0ojagx1xcOR9wcDo.png>
|
Mike C.
Roger Need
mike
KK4ITX John
Sam Reaves
