Re: errors of "error" models
From A Common User's Point of View
By
Bob Albert <bob91343@...>
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#6472
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Re: errors of "error" models
Sorry for question, but what means word "facupov"? It is often mentioned here, but I cannot understand what you're talking about... Just tried to google it, but unfortunately with no success
By
QRP RX
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#6471
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Re: Storing and recalling scan later via Nano VNA saver (or similar)
#internals
#consolecommands
What about RF on the USB cable?
By
W5DXP <w5dxp@...>
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#6470
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Re: How to make Nano VNA Saver fit the full screen without using vertical scrollbars
Rune, I attached a screen shot of the image you ask for. That is a full screen of a scan I saved. I noticed when I first loaded the file the image fit the screen perfectly but when I added Marker3 the
By
wa5tku@...
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#6469
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VNWA software
#calibration
If you have calibration data as impedance and delay, but want S11 s1p format, then VNWA software can generate it, according to Kurt Poulsen. I did not expect this "simply" to be so tricky. It appears
By
Oristo
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#6468
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Re: Provide feedback and recommendations to developers
I don't entirely agree, Erik. GitHub issues can easily be marked as "enhancement" - I certainly use that a lot to weed out what I need to work on, and what's optional. As long as you're polite,
By
Rune Broberg
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#6467
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Re: Provide feedback and recommendations to developers
PLEASE only give feedback on what is supposed to work but does not. Don't submit hundreds of new feature requests as there is only one hugen79 and one edy555 (ttrftech) Github can not be used as some
By
Erik Kaashoek
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#6466
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Re: Storing and recalling scan later via Nano VNA saver (or similar)
#internals
#consolecommands
That detuning should be investigated; I suppose it depends on match between nanoVNA and antenna. For antennas typically using a balun to feed coax, then nanoVNA should have the same. Perhaps running
By
Oristo
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#6465
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Re: Chasing ghosts???
#internals
#calibration
Rotations are mostly by cable delay, and I guess that differences from 180 degrees between rotations for open and short measurements are provoked by non-ideal open and short calibration
By
Oristo
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#6464
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Re: Storing and recalling scan later via Nano VNA saver (or similar)
#internals
#consolecommands
Hi Andy, I cannot support your last statement: That UTP cable is just as much detuning your antenna by common mode current as feeding the antenna by coax without balun would do. Common mode current
By
DJ7BA
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#6463
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Re: How to make Nano VNA Saver fit the full screen without using vertical scrollbars
Hi Wes, can you send me a screenshot? There shouldn't be any problems fitting in 900 pixels vertical space, unless you're running a lot of markers, or quite a large font... -- Rune / 5Q5R
By
Rune Broberg
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#6462
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Re: Storing and recalling scan later via Nano VNA saver (or similar)
#internals
#consolecommands
Usually, the distance to the antenna feed point is 15-20m in my case, but it can be more on high towers. Your suggestion to use a USB extender is a good one, thank you. It will work great for YAGIs on
By
Ady, YO2NAA
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#6461
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Re: Storing and recalling scan later via Nano VNA saver (or similar)
#internals
#consolecommands
A Pi with Python https://www.raspberrypi.org/documentation/usage/python/ .. should be able to run a hack of this: https://oristopo.github.io/nVhelp/html/nVcmd.py in bash shell scripts for such special
By
Oristo
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#6460
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Re: coax fatigue
#test-jig
These have heat shrink (one layer) twice the length of crimp ferrules; 34cm is longer than typically needed, so splurged another ~ US$6.50 on four more with 15cm length. A source for durable pigtails
By
Oristo
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#6459
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Re: Chasing ghosts???
#internals
#calibration
Rich, Current calibration is calculated per frequency point so no relation whatsoever with any other point in the scan. See here: /g/nanovna-users/wiki/Application-Notes for the
By
Erik Kaashoek
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#6458
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Re: Storing and recalling scan later via Nano VNA saver (or similar)
#internals
#consolecommands
How distant is working position? USB extender up to 150ft costs < US$10 https://www.amazon.com/dp/B07LDCK438
By
Oristo
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#6457
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Re: coax fatigue
#test-jig
I have used two alternatives: wrappable heat shrink and Silicone Rubber Self Fusing Tape. The tape come in different thicknesses and widths. A life-saver during some high-altitude balloon missions,
By
Rich NE1EE
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#6455
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Re: How to make Nano VNA Saver fit the full screen without using vertical scrollbars
The ability to resize to fit the display would be a great improvement. My laptop has a 17" display running at 1600x900 but still have the scroll bar for vertical position of the chart. It would be
By
wa5tku@...
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#6454
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Re: Measuring swr
The author does not own older Android, so configured the app support for his versions.
By
Oristo
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#6453
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Re: Measuring swr
you are probably correct, my older android is ver7
By
Paul Raymond <kc1gtk@...>
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#6452
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