Re: Measuring swr
Oh...? And I have not tried the web app. This is on the Android app. Mike On Wed, Oct 30, 2019 at 8:21 PM, Larry Rothman<nlroth@...> wrote: You're welcome! Unfortunately, there isn't a user
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Michael Dooley
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#6093
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Re: usb controled rf generator.
IS this the sort of thing you mean? https://www.sdr-kits.net/QRP2000-kits Some limits on frequency range though. Martin, HS0ZED
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Martin Sole
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#6092
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Re: Measuring swr
You're welcome! Unfortunately, there isn't a user guide for the web app just yet and it's best to play with it and try everything in sight. You can't break anything.? ... Larry On Wed, 30 Oct 2019 at
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Larry Rothman
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#6091
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Re: Voltage sensing diode
VBAT input of STM32F072 has 3.6 V maximum limit. At the same time Li-Ion cell has 4.2 ¡À 0.05 V. As you can see, VBAT cannot handle direct connection due to high voltage. There is needs voltage drop
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QRP RX
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#6090
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IMPORTANT - David Kirkby's email has been restored
I filled up my email quota - mainly due to huge messages from one person. I probably had a number of bounces over the last 6 hours or so. If anyone on any group has blocked me, pease unblock me, as
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#6089
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Re: Success in automatic bridge and calibration error correction calculation
#internals
#calibration
Hi Erik I did not see any picture. I have just taken "my own medicine" and used the calibration kit data I released the other day. I did sweep from 50KHz to 900MHz for the new NanoVNA-H I just got. I
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Kurt Poulsen
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#6088
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Re: Measuring swr
Larry, Found it!? Thanks!? ?Now I can use the app on my Android phone to check swr in the yard. No more lugging the laptop around. ? Mike de N5BGZ On Wed, Oct 30, 2019 at 7:40 PM, Larry
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Michael Dooley
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#6087
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Re: Measuring swr
Actually, the web app DOES have SWR if you know where to set it up... Press the small + at the lower right corner and select CH0 and then SWR in the next pulldown.? ... Larry On Wed, 30 Oct 2019 at
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Larry Rothman
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#6086
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Re: Voltage sensing diode
I have been following this discussion and wondering why the variety of diodes, including Schottky, are used by different folks. And I saw the comment in a post that the firmware assumes a 500 mV drop.
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Rich NE1EE
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#6085
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Re: Success in automatic bridge and calibration error correction calculation
#internals
#calibration
meter cable connected to the reference plane with short and open at its other end, should give perfect circles spiraling inwards in the smith chart. for the reference R, both real and imag) The bridge
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#6084
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Re: Question on
#consolecommands
the funny thing is that this swap of bytes is not needed. And even if it needed for some reason it will be more easy to do on PC side. But it is works in such way, so we need just to live with that
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QRP RX
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#6083
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Re: Question on
#consolecommands
As I read these comments, I wondered if edy55 was interfacing to a little endian machine, and to make life easier, swapped those bytes in firmware. It's a classic bit of trouble twixt swapped endian
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Rich NE1EE
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#6082
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Measuring swr
I'm using the nanovna with the PC program to measure swr.? ? On a whim I loaded the Android app to see if it would do the same, but it does not have an swr setting.? ? Does the webapp do swr?? Or
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Michael Dooley
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#6081
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Re: Question on
#consolecommands
all is intuitive, just edy555 reversed bytes in the pixel on firmware side. This is why data returned from NanoVNA to PC is different than data returned from display to NanoVNA. Just reverse bytes in
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QRP RX
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#6080
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Re: Problems on installation on Linux
Thanks Rune, it works now ... I had not tried to go further and give the command "python3 nanovna-saver.py" now we need a system of self-adaptation to the resolution of the screen, netbook PCs have a
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ik0ozb@...
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#6079
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Re: Question on
#consolecommands
How does scan work? Can it return multiple calibrated CH1 values for a single frequency? By reading code, I now appreciate that 'sample' affects both 'sweep' and 'scanraw' for all traces. Have yet to
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Oristo
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#6078
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Re: Success in automatic bridge and calibration error correction calculation
#internals
#calibration
I think horizontal line from cable loss. Very good free simulator program: http://harriman.ddns.net/Smith_Charts.html Simulate lossy coax (for example RG-58), now subract with ideal lossless coax.
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pgc1682@...
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#6077
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Re: usb controled rf generator.
*VE2PF> "Anyone ever seen a USB controled RF generator?"* https://signalhound.com/product-category/signal-generators/ Vy 73 de Darren G7LWT / AK4DB
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Storer, Darren
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#6076
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Re: Problems on installation on Linux
I meant 5.11.2, but anyway: Remove the ==5.11.2 from the PyQt5 line :-) -- Rune / 5Q5R
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Rune Broberg
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#6075
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Re: Problems on installation on Linux
Hi, try just running "python3 nanovna-saver.py" - if you have the prerequisites installed, it will just run. :-) Otherwise, edit setup.py and remove the fix for version 5.11.3 - which is really only
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Rune Broberg
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#6074
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