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Re: Running NanoVNA Saver (or other software) on Linux
Yes, it runs under Linux (e.g. on a Raspberry Pi, or for that matter, on MacOS)
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You can download the source from the git repo, or I think there’s a package you can apt-get On Mar 22, 2025, at 16:47, k6whp <k6whp@...> wrote: |
Re: Running NanoVNA Saver (or other software) on Linux
Saw this:
Install Howto Update the package index: $ sudo apt-get update Install nanovna-saver deb package: $ sudo apt-get install nanovna-saver Did this: <17:23|~>sudo apt-get update Got this: .... Get:67 jammy-security/universe Translation-en [207 kB] Get:68 jammy-security/universe amd64 DEP-11 Metadata [125 kB] Get:69 jammy-security/universe amd64 c-n-f Metadata [21.7 kB] Get:70 jammy-security/multiverse amd64 DEP-11 Metadata [208 B] Reading package lists... Done N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository ' vscodium InRelease' doesn't support architecture 'i386' E: Failed to fetch 403 Forbidden [IP: 79.143.189.67 443] E: The repository ' focal InRelease' is no longer signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. Did this: <17:25|~>sudo apt-get install nanovna-saver Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package nanovna-saver <17:26|~> Sorry to be lame; what am I missing? -- William, k6whp -------------------- "Cheer up, things could get worse. So I cheered up and things got worse." |
Re: Running NanoVNA Saver (or other software) on Linux
Michael Robinson
Michael L Robinson, KC0TA “In the beginning of a change the Patriot is a scarce man, and brave, and hated and scorned. When his cause succeeds, the timid join him, for then it costs nothing to be a Patriot.” ― Mark Twain When Tyranny becomes Law, Revolution becomes Duty! On Sat, Mar 22, 2025 at 6:47?PM k6whp via groups.io <k6whp= [email protected]> wrote: Have been searching the threads for this item and am wondering if.. |
Running NanoVNA Saver (or other software) on Linux
Have been searching the threads for this item and am wondering if..
(1) NanoVNA Saver has a port to Linux or can be run under Wine on Linux? (2) Are there any other NanoVNA software packages that run under Linux? Thank you in advance. -- William, k6whp -------------------- "Cheer up, things could get worse. So I cheered up and things got worse." |
Re: Measurement correction for Zc Coax caracteristic Impedance
OK, yes, I can see that.
Zack <> Virus-free.www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Fri, Mar 21, 2025 at 4:17?PM Team-SIM SIM-Mode via groups.io <sim31_team= [email protected]> wrote: Hi Zac |
Re: using an adjacent RAIN GUTTER for HF bands
Rain gutter: i sometimes use my (horizontal) rain gutter, with its two
vertical downspouts, as an antenna, at low power such as for WSPR. I feed it with a 9:1 balun (for 20 meters) and with a 1:1 balun (with an added L-C match) for 40 meters. Inside the apartment is a 10-meter-long radial on the floor. It's not my best antenna of course but it works somewhat, especially on 20-meter WSPR. I used the nanoVNA to check it out. Also SimNEC. ... On 14 MHz and higher (HF) with the 9:1 it is fine. I use only about 5 watts into it, because the feedpoint is not bolted to the metal gutter. The wire is wrapped around a lag bolt which i screw into the tight space between the gutter and the wooden eaves. Every so often i turn the lag bolt and squirt some oil into the joint. I would say it's not much better or worse than my indoor mag loops at 5 watts. Orrin WN1Z El vie, 21 mar 2025 a la(s) 12:36?p.m., Barry K3EUI via groups.io (k3euibarry@...) escribió: * |
using an adjacent RAIN GUTTER for HF bands
*
* * * *???? Multi-Band? HF?? Vertical* * * *In an effort to get a?? VERTICAL ANTENNA ? up for the 20/17/15/10 meter bands, I tried setting up a 14 ft vertical antenna* *made from old aluminum tubing, mounted 3 ft above ground, adjacent to a 20 ft vertical aluminum rain gutter - mounted just inches from it for close coupling.* *Set up three radials - two were 13 feet and one was 33 ft. **No matching of any kind.* * * *Results were surprising as the rain gutter makes this vertical into a reasonable multi-band vertical for 20/15/10 meters. * *Cost was almost nothing.* *Fed with 50 ft of RG8X and a coax choke at the input to the antenna terminal.* *I'll have to try it out this weekend on 20/15/10m digital and see if it radiates a low-angle DX signal.* *de k3eui? barry* |
Re: Measurement correction for Zc Coax caracteristic Impedance
Your coax is only going to have a "resonant frequency" if it is terminated
in a very high SWR or a load with a very high or low impedance, such as an open or short. If the load is somewhere close to 50 ohms, you aren't going to see any resonant frequency that is worth any concern. Zack W9SZ <> Virus-free.www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Fri, Mar 21, 2025 at 6:56?AM Team-SIM SIM-Mode via groups.io <sim31_team= [email protected]> wrote: Hi |
Re: Measurement correction for Zc Coax caracteristic Impedance
Since you asked what we think - I think this:
For amateur radio use, there is no reason that I know of to have high accuracy in the measurement of cable impedance. It may be fun for an intellectual exercise, but practically, all we need to know is if the coax is 50-ohm, 75-ohm, 92-ohm, etc., with enough accuracy that we can see that it is a good cable. And DiSlord's current algorithm gives at least this level of accuracy. We combine that measurement of impedance with a loss measurement and perhaps an electrical and physical length measurement to evaluate a cable's suitability for our purpose. Even the best coax cables are not 'exact' in their impedance, and in fact, due to manufacturing tolerances, may vary a couple of percentage points of impedance along the length of the cable. A 50-ohm cable that measures 49.1 ohms of impedance is just fine. These variations and minor differences from an 'exact' 50-ohms or 75-ohms make almost no difference in actual use of the cable for any practical purpose. (The VSWR resulting from the difference between 49.1 and 50 ohms is only 1.018:1.) The 'loss' calculation of the cable is of much more practical use than impedance, since it will determine power delivered to the load, extra loss due to SWR, etc. But even that loss measurement only needs to be 'reasonably' accurate, maybe to 10ths of a dB, for almost any practical amateur radio application. And when building matching stubs with coax, we have to measure the electrical length anyway, which measurement includes any variation due to imperfect impedance. So again, I don't put any value on highly-accurate cable impedance measurements. Stan KC7XE |
Re: Measuring inductance
for my saa2n i have cal standards with plugs (male connector) .. but i wanted also female (so i can calibrate at cable end with a plug without double female needed)
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so i took 3 N sockets .. one with a short .. one with an open .. and third got 2x 100 Ohms SMD resistors in parallel (centre pin shorted on all three to exact same length) works good to over 3 ghz :-) dg9bfc sigi adding a "keyring" to secure them against getting lost Am 21.03.2025 um 18:21 schrieb W0LEV via groups.io: QUOTE: ....a DIY fixture can be made using a female SMA connector with its |
Re: Measuring inductance
QUOTE: ....a DIY fixture can be made using a female SMA connector with its
centre conductor sawn to the same level as the dielectric. ..... *** You can buy such a connector with no need to clip off the tip. They are known as launchers and instead of the cylindrical tip, contain a short ribbon connector meant to be directly soldered to a microstrip trace. Dave - W?LEV On Fri, Mar 21, 2025 at 7:30?AM biastee via groups.io <biastee= [email protected]> wrote: On Mon, Mar 17, 2025 at 03:22 PM, W0LEV wrote:--best "amateur" fixture is to solder cal. standards and test items to theIndeed, the HP16092A is the butt end of an APC-7 connector, with just 3mm *Dave - W?LEV* -- Dave - W?LEV |
Re: Apologetic Intro Message
On Tue, Mar 18, 2025 at 04:17 PM, ae1th@... wrote:
look in files section, menuand notes by bruce dated 2024, good menu map andWanted to add another "thank you" for posting that information. I've had nanoVNAs since they first emerged (2019?), and a ham friend recently gave me one dated from that era. Had never been updated, i.e. I had to dig through my boxes to locate a "grabber" to jumper the BOOT/VDD pins and enter the DFU mode. After I updated it to the latest DisLord firmware I began wondering if someone had compiled a current menu structure, and BINGO, I found it here. To this day it still staggers me how inexpensive, powerful and useful these tiny nanoVNAs are. When I received my very first one I was so blown away after using it to test some filters that I rushed to order a second one, convinced that it was "too good to be true". Surely there must me some mistake for this capability to be had so cheaply, I thought(!). |
Measurement correction for Zc Coax caracteristic Impedance
Hi
DiSlord Coax Zc measurement function, already installed on H4 1.2.40 firmware, seems need to measure C0 capacitance @ 100Khz and the f0 first coax resonance frequency (Hz) and then we calculate Zc = 1/(4 x f0 x c0) Ohm , I appreciate it a lot. Can we do some accuracy correction ? indeed diélectric permittivity of polyethylene diélectric can vary with fréquency , it can decrease slowly up to -4.5% from 100Khz to 14.1Mhz for example , so we can correct C0 value by -4.5% and then ZC should be increased by +4.5% to be more accurate @ 14 Mhz Zc measurement . if our coax has 22.28 metre long with Vp around 83% , the first resonnance frequency will be around 2.71 Mhz wich still far from 14Mhz and may be some % error may be done , I prefer to measure the resonnance or antiresonance the nearest to the 14Mhz and devide by number for correction to have the more accurate Zc value based on measurement done as near as possible to the desired frequency .. What you think about all this view , or DiSlord has already taken in consideration all this possible corrections . 73's Nizar . |
Re: Measuring inductance
On Mon, Mar 17, 2025 at 03:22 PM, W0LEV wrote:
best "amateur" fixture is to solder cal. standards and test items to theIndeed, the HP16092A is the butt end of an APC-7 connector, with just 3mm of the centre conductor protruding beyond the insulator. It has an advertised max freq of 500 MHz. I agree with Dave that a DIY fixture can be made using a female SMA connector with its centre conductor sawn to the same level as the dielectric. Then, a plastic bulldog clip (similar to one in the photo of the S21 fixture) can be used to clamp the chip component down. I have measured a 89 nH inductor (6.5 turn, ID2.9mm) using the 1st type of fixture (fixt s11.jpg). The fixture is calibrated using a 1206 size 50ohm chip, and a brass shorting bar. Using the nanoVna V2+, the S11 from 10 to 1000 MHz (s11.jpg). The self-resonance is above 1000 MHz. The trace stays inside the chart. The Q can be calculated from the impedance = R+jX at different freqs. According to HP/KS, the VNA has poor accuracy when the S11 trace is near the perimeter. Hence, I also measured the same inductor using the S21 method in a microstrip fixture (fixt s21.jpg). A plastic bulldog clip is used to clamp the inductor to the PCB. The fixture is calibrated bridging the microstrip gap with a brass bar (thru). The measured and modeled S21 points a parasitic cap of 0.16 pF (s21_gra.jpg) |
Re: Am I in the right track ?
Hi Dave,
1- I've upload the Kicad project as a zip file. 2- I also upload a PDF showing this part of the schematic and layout with different zoom levels in case you can't download or open the Kicad project. 3- The manufacturer (TE Connectivity) suggest a 3 element matching network (as pictured in the datasheet) to compensate for the final mounting conditions (plastic case). I've implemented what they suggest, leaving the pads unpopulated. I tried soldering only a series inductor. I used SimSmith software to simulate the required value. 4- For all the tests you've requested me, I've populated the series element with a 0 ohm resistor. 5- I'm in the process of modifying the schematic and layout. As a real amateur, I mixed up the transceiver pinout with a different model. When I came to fully assemble one of the boards, I realized it would have never worked. The schematic I attached is the modified version I'm working on. I haven't moved the antenna or modified the ground plane dimension nor its shape. only the position of the LoRa module and the transmission line shape. 6- WOW ! Huge findings tonight ! I moved the ferrite decoupled coax AFTER the matching circuit, right at the antenna. Look at the pdf I have attached. The results are in the last 4 pages. Essentially, Even with the PCB mounted in its case, the VSWR stays relatively acceptable under all across the full ISM bandwidth from 902 to 928. The response is more flat and "clean". This suggests me there is something wrong with the transmission line in the section where there is a ground plane. Thank you so much once again for all your dedication helping me Nicolas Kicad Project Monopole Coil.zip
Kicad Project Monopole Coil.zip
S11 Measurement notes.pdf
S11 Measurement notes.pdf
|
Re: New user (owner) of Nano VNA
Howard,
I used the SMA to SMA jumper cables which came with the Nano VNA and calibrated using the open, short and load connectors ( ). Then I used an SMA to SO239 adapter on the jumper cables as my antennas have PL259 termination and it worked well. Somehow it did not work well when I used PL259 open, short and load for calibration. If your antennas have SMA termination, then there is no need to use the adapter. I did not use any software other than the built-in software in the Nano VNA. 73 Jon, VU2JO On Thu, Mar 20, 2025 at 11:07?PM Howard via groups.io <n9ktw= [email protected]> wrote: Hey guys |
Re: New user (owner) of Nano VNA
Well, simply put:
First, do an OSL calibration for the range you want to use, and store it in one of the memories. Then select Display > S11 > SWR. It should then display the SWR of whatever is connected to the S11 (upper) connector. Very simple. Zack W9SZ <> Virus-free.www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Thu, Mar 20, 2025 at 12:37?PM Howard via groups.io <n9ktw= [email protected]> wrote: Hey guys |
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