Re: NANOVNA Not Connecting to Mac with USB C Cable
I don't have a Mac but I check my cables with this simple tester (4 wire leads). Does a continuity/open/shorts test and checks for any cross-overs
I purchased mine 2 to 3 years ago but I have just checked the link and they say they still have 20 in stock.
I have an english translation of the chinese instructions if anyone needs them, but it is pretty easy to figure out how to use it without the instructions.
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Help with nanoVNA H4, original firmware and oldest show "error: si5351_init failed" but most new firmware I haven?t calibration in the Smith letter, the green signal dance
In the screen there isn?t difference between: short, open and load
Any idea?
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Re: Metalising plastic cases (Re: [nanovna-users] JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz)
Printing copper has been requiring very costly equipment. A German company has found a way to do it with exiting laser printers.
BillSF9c
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Hola, tengo un nanaVNA H4 nuevo, solo fue utilizado 6 veces para ajustar una antena de VHF, la ultima vez que lo encend¨ª apareci¨® en la pantalla error: si5351_init failed
Baj¨¦ el firmware original y otros m¨¢s viejos, pero sigui¨® apareciendo ese error, entonces instal¨¦ firmwares m¨¢s nuevos, el error no apareci¨® m¨¢s, pero cuando realizo las calibraciones, no aparece la indicaci¨®n en la carta de Smith de: corto, abierto y carga de 50 ohms, queda toda la pantalla como se ve en la imagen, POR FAVOR AYUDA
Hello, I have a new nanoVNA H-4, working only six times for adjusment the VHF antenna, in a moment I turn on and appear in the display "error: si5351_init failed" the original firmware Build time is: feb 21 2020
I downloaded the new firmware from february 2020 onwards, but the screen is all green and the calibration they haven?t effect in the Smith diagram: open, short and load. HELP PLEASE
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Re: Soil Probe Calculator
Interesting.? ?I bet I could get the probes about 2" deep in the Georgia clay!
Mike
WM4B
Sent from my Verizon, Samsung Galaxy smartphone
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Re: Soil Probe Calculator
I've posted a more complete description of N6LF's new ground probe here:
The latest version of the probe calculator will process VNA4win, RigExpert, and W5BIG CSV files in addition to Touchstone files from NanoVNA software.
Brian
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Re: nanoVNA-Saver v0.3.10 on Win7 64
Hi , after many efforts to register the missing dll api-ms-win--core-path-l1-1.0.dll , with negative results ,
I decided to install the last version ( 3.8.10) of Python for Win7
Then I downloaded the last version of nanoVNA-Saver ( v0.3.10 ) source code and installed it the the Win7.
Now I'm able to execute the python version of the nanoVNA-Saver .
Best regards
Maurizio IZ1MDJ
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Re: NANOVNA Not Connecting to Mac with USB C Cable
Keith,
I just confirmed functionality with a new apple USB-C cable on an M1 Mini running Monterey. NanoVNA-H4 running V1.0.69.
Interestingly, the program crashed a couple of times before it successfully ran - not sure if/how it is related to the USB-C cable.
Terry - KD8RGJ
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Re: Metalising plastic cases (Re: [nanovna-users] JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz)
In YO you can find in stores a liquid silver solution made in Germany, used
to repair broken electrical circuits. Something similar can certainly be
found anywhere in the world.
?n mie., 19 ian. 2022 la 17:05, Jim Lux <jim@...> a scris:
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On 1/19/22 5:04 AM, chris_group_mail via groups.io wrote:
It's possible to get conductive 3D printer filament. The conductivity is quoted as 15 ohm - cm, would that work for shielding?
Chris
That might be better described as semiconductive. Copper is 1.62
microohm-cm resistivity. So the shielding mechanism for something
printed might be more "lossy" than "shielded"
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3D printed shielding, was Re: Metalising plastic cases (Re: [nanovna-users] JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz)
Yeah, that starts with an explanation of how the feature side has to be some fraction of a wavelength, so you are probably going to end up falling back to the bulk properties of the material, which might be lossy, but aren't going to be shielding. The article below also talks about mixing and extruding your own filament in order to tune the conductivity of the bulk material, but that gets you further from repeatable, IMHO.
73, Willie N1JBJ
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On Jan 18, 2022, at 7:44 AM, Dave Johnson <davejohnson3000@...> wrote:
This was the first I found, which didn¡¯t seem useful given the 30GHz range:
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Re: Metalising plastic cases (Re: [nanovna-users] JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz)
On 1/19/22 5:04 AM, chris_group_mail via groups.io wrote: It's possible to get conductive 3D printer filament. The conductivity is quoted as 15 ohm - cm, would that work for shielding?
Chris
That might be better described as semiconductive.? Copper is 1.62 microohm-cm resistivity. So the shielding mechanism for something printed might be more "lossy" than "shielded"
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Re: Annual payment for 2022
Dave
Happy to contribute, please provide details.
Keith
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Re: Metalising plastic cases (Re: [nanovna-users] JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz)
It's possible to get conductive 3D printer filament. The conductivity is quoted as 15 ohm - cm, would that work for shielding?
Chris
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Re: Wikipedia erases nanovna
On 18/1/22 09:26, Larry McElhiney via groups.io wrote: I suspect that Wikipedia did not erase it, another editor erased it.
I would create a new article called ¡°NanoVNA¡± and put a link to the Network Anayzers page. You should have more success¡
But, make sure that you have good citations and images or another editor might have issues. A poorly understood fact about Wikipedia is that it has extensive quality documentation against which edits are evaluated. Yes, anyone can edit, but if an individual contribution doesn't make the grade then someone will likely remove it (or fix it if they can do so quickly). Lack of citations is likely to be a problem, but the biggest stumbling block tends to be notability, a topic on which the documentation is enormous. The fact that a contributor is very enthusiastic about a topic (a book, their employer, a type of test equipment, ...) doesn't make it notable. Misuse of Wikipedia as a promotional platform is rampant, so it is generally the proponent's burden to demonstrate notability. Fortunately the criteria are public and are generally objective enough to work with, even if it time-consuming to do so. Assume a couple of days' work to perform and document the research to make the case for notability in the course of writing the initial version of an article. I wouldn't care to hazard a guess whether NanoVNAs would qualify. Even with repeated mentions by ARRL, they're still a niche item. - Roland 9V1RT
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Re: Wikipedia erases nanovna
In a similar vein I have had people tell me about setting a perfectly good unneeded household item on the curb with a "free" sign on it. After being there for a while with lots of traffic but no takers they put a sign on it that read $20 and quickly had a taker. I wasn't fooled by this recently. At a hamfest an old guy had a minty vintage 6 Meter Yaesu SSB rig on a table with a "free" sign. He mumbled something about missing crystals. Yeah, right... It had been there a while and I actually stood by the table chatting with an old friend for several minutes before I said to heck with it and grabbed it. With original box, manual, mic, and the unobtanium but much sought power cord. Well, guess what? No crystals were missing. As I suspected what he was seeing was the empty fixed frequency crystal sockets on the top side. All the original het crystals are there. RX and TX work and power output is at spec. Alignment needs a little touch-up but I'm not gonna ask for my money back. :) Cost does not necessarily reflect value. 73 -Jim NU0C On Tue, 18 Jan 2022 21:21:25 -0500 "Mike C." <mg@...> wrote: You are absolutely correct, people perceive cost (cheapness) to similar
quality. Big mistake on their part. True Story: As a side business a
friend of mine and me purchased government surplus.
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Re: Wikipedia erases nanovna
Hi Dave,
You are absolutely correct, people perceive cost (cheapness) to similar quality. Big mistake on their part. True Story: As a side business a friend of mine and me purchased government surplus. Sometimes we got lucky and got totally unused test equipment. We picked up 3 HP 436A for ~$150 total. We put them up on the web site for $450 ea. A customer called and asked if the 3 sensors that were part of that kit number were included. We said we didn't know but would check. They were in the bottom of the box which we had not investigated. (our bad) We told him they were and could have the whole kit at our advertised price. He said he'd think it over.
Keep in mind that HP was selling this set for approximately $6,000 EACH. The guy never called back, probably thought they were stolen at that price. We raised the price to $3,000 EACH and they all sold within a week. Bottom line, "yes people can be STUPID". His bad, he could have had the 436 for a song. Question: Why would a surplus outfit (us) take a chance of selling stolen equipment at a ridiculous price? Live and learn. Sorry to be so long winded but that's only one of many stories in the surplus business. (I'm getting too old for this stuff, that's why I'm trying to put myself out of business)
Mike C.
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On 1/18/2022 12:54 PM, W0LEV wrote: QUOTE FROM THE WIKIPEDIA REPLY: ".... , not a catalog of cheap test gear."
I'll throw in another 'hypothesis": The NANOVNAs don't cost enough (they
are selling very well, so, PLEASE, don't increase the price just to satisfy
some misguided stuffed shirt - please....). There is a real perception
that something which comes in around $50 to $200 just can't be any good.
After all, look at the prices of similar instruments from
HP/Agilent/Keysite, R&S, Tektronix, RigExpert (??) to mention a few. How
can it possibly be any good costing so little.....it must be "junk".
Well, many of us, myself included, have done A / B comparisons of the NANOs
against the more "respected" and very expensive equivalents from the big
boys. Within their strengths and weaknesses (both the NANOs and the $$$$
units), they compare very favorably.
During my career I once worked for an electronic "widget" company that
introduced our products at cost + labor + engineering + ........ to the
marketplace. It didn't sell too well against the competition which was
priced some 10X and upward over our offerings. We hired a consultant. You
guessed it. The product was just too "cheap" and viewed as sub-standard
for that reason alone. So, we massively raised our profit margin (feeling
guilty), and it began to sell. Once it was "discovered" in the
marketplace, we could not keep up with orders.
QED - from experience.
Dave - W?LEV
On Tue, Jan 18, 2022 at 1:09 AM MRH <wildwoodflower@...> wrote:
I put a section about nanovna in the network analyzers article of
Wikipedia. It was erased (reverted) and whoever did it commented
"promotional, not a catalog of cheap test gear."
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Re: Metalising plastic cases (Re: [nanovna-users] JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz)
I feel this has to have been said, and perhaps was, "IOW," and I missed it. Apologies if so.
Conductive ink for ckt bd repair. Brush on w a flux brush or better.
I'd suggest copper tape at junctions of clamshell cases and such, and overlap the conductive paint onto it a bit. Pink eraser onto the copper perhaps or 0000 steel wool.
Aluminum is well known to corrode in air to a.depth of 1-2 molecules, (or so I have read.) Perhaps anti-corrosive paste, made for copper to aluminum electrical junctions, messy, may have a fit in a few cases... no pun intended. Lube for a partially conductive hinge? (I don't suspect it actually conducts, but I could be very wrong.)
BillSF9c
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Re: Annual payment for 2022
Dave and Group:
This is one of the best online groups for learning all things about the RF
world. And the offering of the NANOs allows that. I'm reading many are
using it professionally as an in-field tool. And schools ordering in the
10's and more for educations. I just hope it continues to be available at
reasonable prices and eventually finds its way into the mainstream of good
test equipment. It deserves that as it compares absolutely astonishingly
well with expensive units upwards of $15k and more! Thank you guys and
gals, who made this unit available!!!!! And the www site to help others
learn the fine points of all things RF.
Just another Dave - W?LEV
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On Tue, Jan 18, 2022 at 7:28 PM Dave Daniel <kc0wjn@...> wrote: All,
I have paid the annual payment to groups.io so that the nanovna-users
group may remain available to all of us for another year.
Many forum members pledged small to medium amounts of money to cover
this cost. By and large this was a very successful "pledge drive".
I made some communication errors during my handling of this and I
apologize to any who may have been confused by anything that I wrote.
I'll try to do better next year.
Our thanks to all who pledged and to all who provided funds.
As I wrote in response to the many forum members who pledged and whose
funds were not needed, this will occur year after year going forward.
Thanks again.
Dave Daniel, co-owner
--
This email has been checked for viruses by Avast antivirus software.
--
*Dave - W?LEV*
*Just Let Darwin Work*
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Re: NANOVNA Not Connecting to Mac with USB C Cable
Keith,
I discovered the C to C cable that came with my original/official H4 can only be used in one direction as even though both ends are 'USB-C'
There is different internal wiring between the two ends.
I now have the ends labelled has HOST and DEVICE and no longer have issues.
Maybe you're seeing the same issue?
...Larry
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On Tuesday, January 18, 2022, 02:35:05 p.m. EST, Keith <kljw66@...> wrote:
Hello
just reinstalled NANOVNA Software on my MacBook Pro 2019. The N-VNA has a USB C connector, so decided to buy a USB C to C cable as opposed to an adapter for my USB to USB C cable.... Failure!!!
I have tired 7 other USB c to C cables that all claim to be data compatible, but no connection. Only the old USB to USB C cable works.
Apart from using my old setup, any suggestions on the issue and how to resolve...
Keith
MM0KTC
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NANOVNA Not Connecting to Mac with USB C Cable
Hello
just reinstalled NANOVNA Software on my MacBook Pro 2019. The N-VNA has a USB C connector, so decided to buy a USB C to C cable as opposed to an adapter for my USB to USB C cable.... Failure!!!
I have tired 7 other USB c to C cables that all claim to be data compatible, but no connection. Only the old USB to USB C cable works.
Apart from using my old setup, any suggestions on the issue and how to resolve...
Keith
MM0KTC
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Graham (ZL1CE)
Mike Besemer - WM4B
Keith
Jim Shorney
Mike C.