Re: [Suggestion] AA version display
Try the reald firmware. Bigger fonts for use in sunlight...
You will find it here>>
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[Suggestion] AA version display
Hello everyone, specially our developers.
Since we have an Antenna Analyzer version of our FW, can we have it more simple for field use?
Simple information like SWR, or at least lowest SWR, etc...
Some examples below.
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1/4 w stubs for filtering harmonics in a so2r setup
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Thanks DiSlord you are absolutely right , I added the? "d" and it's ok, sorry my fault.
Jos
Op 1-4-2020 om 20:33 schreef DiSlord:
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Need use 'bandwidth'
You enter 'bandwith' lost 'd'
Use 'help' command for recive list of all supported commands
On Wed, Apr 1, 2020 at 11:28 AM, Jos Stevens wrote:
Hi DiSlord,
Thanks for the new firmware. I flashed it and it runs OK. font looks ok
to me,? but I tried the bandwith command, when I enter bandwith,
bandwith 9 or whatever number, I always get back "Bandwith?", sorry
about that.
Regards
Jos
Op 1-4-2020 om 19:17 schreef DiSlord:
Small update for NanoVNA-H4
Font fixes (try made mo readable, fix some font glyph)
Little slowdown i2c bus (as i calculated in last version i set 800kHz speed, it too fast, set it to 600kHz)
Little display text error fixes
I hope updated font look better
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Need use 'bandwidth'
You enter 'bandwith' lost 'd'
Use 'help' command for recive list of all supported commands
toggle quoted message
Show quoted text
On Wed, Apr 1, 2020 at 11:28 AM, Jos Stevens wrote:
Hi DiSlord,
Thanks for the new firmware. I flashed it and it runs OK. font looks ok
to me,? but I tried the bandwith command, when I enter bandwith,
bandwith 9 or whatever number, I always get back "Bandwith?", sorry
about that.
Regards
Jos
Op 1-4-2020 om 19:17 schreef DiSlord:
Small update for NanoVNA-H4
Font fixes (try made mo readable, fix some font glyph)
Little slowdown i2c bus (as i calculated in last version i set 800kHz speed,
it too fast, set it to 600kHz)
Little display text error fixes
I hope updated font look better
|
Hi DiSlord,
Thanks for the new firmware. I flashed it and it runs OK. font looks ok to me,? but I tried the bandwith command, when I enter bandwith, bandwith 9 or whatever number, I always get back "Bandwith?", sorry about that.
Regards
Jos
Op 1-4-2020 om 19:17 schreef DiSlord:
toggle quoted message
Show quoted text
Small update for NanoVNA-H4
Font fixes (try made mo readable, fix some font glyph)
Little slowdown i2c bus (as i calculated in last version i set 800kHz speed, it too fast, set it to 600kHz)
Little display text error fixes
I hope updated font look better
|
Small update for NanoVNA-H4
Font fixes (try made mo readable, fix some font glyph)
Little slowdown i2c bus (as i calculated in last version i set 800kHz speed, it too fast, set it to 600kHz)
Little display text error fixes
I hope updated font look better
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Re: Storing and transporting your NanoVNA
I use a high impact case from Apache.
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On Wed, Apr 1, 2020, 12:34 PM <john@...> wrote: I'm wondering what folk are using for storing and transporting their
NanoVNA and accessories. My little cardboard box is falling apart.
Thanks
-John
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Re: Storing and transporting your NanoVNA
I've got mine in a belt-mounted digital camera soft-case with two compartments - one for the nano and the other for adapters and cables.
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On Wednesday, April 1, 2020, 12:34:00 p.m. GMT-4, john@... <john@...> wrote:
I'm wondering what folk are using for storing and transporting their NanoVNA and accessories. My little cardboard box is falling apart.
Thanks
-John
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Re: Storing and transporting your NanoVNA
John,
Dave-KB1PVH
Sent from my Galaxy S9
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On Wed, Apr 1, 2020, 12:34 PM <john@...> wrote: I'm wondering what folk are using for storing and transporting their
NanoVNA and accessories. My little cardboard box is falling apart.
Thanks
-John
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Storing and transporting your NanoVNA
I'm wondering what folk are using for storing and transporting their NanoVNA and accessories. My little cardboard box is falling apart.
Thanks
-John
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Never mind - just click on the "Read-Only" button to open the presentation
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On Wednesday, April 1, 2020, 12:19:34 p.m. GMT-4, Larry Rothman <nlroth@...> wrote:
Why is it password protected ?
? ? On Wednesday, April 1, 2020, 11:55:21 a.m. GMT-4, W1RS <deflatermaus@...> wrote:
Here is another good reference
from Fritz Dellsperger, Professor for RF and Microwave Engineering (HB9AJY )
at Bern University of Applied Sciences
from 1992 to 2012, now retired
There is a good powerpoint presentation link in the page.? I will try to post it to the Files section as "Smith-Chart Intro_2016_en_pwd.zip"
There is a Computer Smith-Chart Tool and S-Parameter Plot called "Smith" V4.1, The demoversion may be freely distributed.
The demoversion is limited to 5 datapoints and 5 elements which is good for matching design.
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Why is it password protected ?
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Show quoted text
On Wednesday, April 1, 2020, 11:55:21 a.m. GMT-4, W1RS <deflatermaus@...> wrote:
Here is another good reference
from Fritz Dellsperger, Professor for RF and Microwave Engineering (HB9AJY )
at Bern University of Applied Sciences
from 1992 to 2012, now retired
There is a good powerpoint presentation link in the page.? I will try to post it to the Files section as "Smith-Chart Intro_2016_en_pwd.zip"
There is a Computer Smith-Chart Tool and S-Parameter Plot called "Smith" V4.1, The demoversion may be freely distributed.
The demoversion is limited to 5 datapoints and 5 elements which is good for matching design.
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Hello,
This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected]
group.
Uploaded By:
W1RS <Deflatermaus@...>
Description:
Introduction to the Smith-Chart, (Powerpoint, en)
Cheers,
The Groups.io Team
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Here is another good reference
from Fritz Dellsperger, Professor for RF and Microwave Engineering (HB9AJY )
at Bern University of Applied Sciences
from 1992 to 2012, now retired
There is a good powerpoint presentation link in the page. I will try to post it to the Files section as "Smith-Chart Intro_2016_en_pwd.zip"
There is a Computer Smith-Chart Tool and S-Parameter Plot called "Smith" V4.1, The demoversion may be freely distributed.
The demoversion is limited to 5 datapoints and 5 elements which is good for matching design.
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Re: 100 ft Coax to Dipole Antenna - Can the NanoVNA show just the Dipole analysis?
On Tue, Mar 31, 2020 at 01:30 PM, Jeff W6FCC wrote:
RG8X
RG8X (foam dielectric) has Vp of 0.79 and loss at 7.2 MHz of 0.75 dB per 100 feet. Electrical wavelength length of RG8X @ 7.2 MHz is 107.9 feet. One trip around the Smith chart is half wavelength so 100' would be 1.85 rotations around the chart. The round trip loss would be 1.5 dB which is 0.84 reduction in Rho vector that spirals inward as length of coax gets longer and loss increases. So you should push the value point on Smith chart outward (increase number) by 1/0.84 or 1.19 times to correct of loss of coax. It would be best if you can put a short at the end of the coax to measure the electrical length and loss. If coax is RG8X and 100' in length, and VNA is calibrated without coax, the left most point on Smith chart (minimum Z) should be at 7.77 MHz. At this point the round trip loss should be -1.59 dB ( rho = 0.833) inward from outer ring of Smith chart, at left-most point along the real horizontal center line. (loss at 7.77 MHz is 0.794 dB per 100')
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Re: NanoVNA-Saver Linux update procedure
#tutorials
Hi I am new to this group and this topic is kind of old but maybe the problem is still there.
I had the same issue and I got it working in this way: open file setup.py and, at the end, replace
install_requires=[
'pyserial',
'PyQt5',
'numpy',
'scipy'
],
with
install_requires=[
'pyserial',
'PyQt5 <= 5.14.0',
'numpy',
'scipy'
],
It worked for me, I am running Ubuntu 18.04.4 LTS
Paolo - IZ2RXS
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Re: 100 ft Coax to Dipole Antenna - Can the NanoVNA show just the Dipole analysis?
Jeff, Of course the antenna is not 50 Ohms. No antenna is 50 Ohms across the whole band or bands. Like I said, the coax just rotates the antenna impedance around the Smith Chart. While you can't measure the impedance without knowing the exact length and Vf of the transmission line, the VSWR/Return Loss is the same at both ends of the transmission line minus twice the insertion loss of the line. 73, Carey, WB4HXE On Tue, Mar 31, 2020 at 4:27 PM Jeff W6FCC via Groups.Io <w6fcc= [email protected]> wrote: Carey,
If the antenna is NOT 50 ohms (it's actually an offset multi-band dipole
with a 4::1 balun transformer), or not resonant, I was thinking that the
COAX would introduce some problems.
They do use small runs of COAX for matching, that's what I was thinking,
that the SWR would not be constant across the length of the COAX if the
antenna was not 50 ohms resonant.
I was looking for a way to put the imaginary connector to the antenna at
the far end of the COAX but maybe that's not going to solve anything.
Jeff
-- Carey Fisher careyfisher@...
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Re: 100 ft Coax to Dipole Antenna - Can the NanoVNA show just the Dipole analysis?
Hi Jeff If you use the NanoVNA-Saver and do a proper calibration then you just measure at the TX side and save the measurement to a s1p Touchstone file. Then download the ZPlots by AC6LA and open up the s1p file- Then you can shift the measurement the 100 feet to the antenna position. Following conditions: The cable type and manufacturer to be selected in ZPlots must be know The cable length must be known exactly else use the Time domain of NanoVNA-saver but VF must be know for the cable You need to have Windows EXCEL to run ZPlots Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af Jeff W6FCC via Groups.Io Sendt: 31. marts 2020 19:31 Til: [email protected]Emne: [nanovna-users] 100 ft Coax to Dipole Antenna - Can the NanoVNA show just the Dipole analysis? Setup: I have a 40 meter dipole at 30 feet. Feeding with 100 ft of RG8X Measurement: 7.200 Mhz, SWR at RADIO end of COAX can be measured (For the Analysis System -- coax + antenna) Question: Can the Reference plane be "calculated" by software. It's the location of the antenna at the END of the Coax, discounting the Feedline, perhaps by entering the Feedline Impedance and Velocity Factor and Loss? Asked a different way: Can the NanoVNA be used to isolate the antenna at the far end of the COAX and somehow IGNORE the impact of the COAX itself ? I realize the best way to check the antenna is AT the feedpoint, but that is not possible right now. I'm stuck at the Radio End of the COAX and trying to determine of the DIPOLE is too long or short. One possible "solution" IF I could take a second piece of 100' RG8X and do the calibration at the far end (OPEN, SHORT, LOAD) and push the Reference plane out to the 100' mark. But can it be done without a second piece of COAX ?? Has anyone calibrated their NanoVNA using a long piece of coax and doing the CAL at the end of the coax before attaching to an antenna to be tested ? Jeff, W6FCC, 3-31-2020
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When I made mine.? I used some jumpers and a bnc-bnc barrel in the middle to make up for the bnc T (about the same length), calibrated with all that attached, then just changed the barrel to the BNC and tuned the stubs.? Worked fine for us for the Idaho QSO party.
KI0E
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On 3/31/2020 1:10 PM, Bill wrote: Has anyone used the nanovna to make tunes coaxial stubs? I was thinking you'd need to get rid of the jumper which would add length to the overall stub. I picked up an SMA to SO-239 connector which hopefully would do away with the extra cable.
Anyone have any tips for this?
Thanks
Bill K4FX
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Roger Need
CT2FZI
David Webb
Kurt Poulsen