HI-Z EVALUATUTION - MEASURED DATA COMPARISON with HP 8753C
OK.....I just had to do it. NANOVNA-F measured data compared to the HP 8753C measured data. Subjects are: 1) 220-ohm 1/8-watt 10 % 2) 470-ohm 1/8-watt 5 % Both VNA's were calibrated SOL. Measurements
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W0LEV
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#10975
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Re: nanoVNA Maximum Impedance Measurement (Folded Dipole example)
I removed the comma from the end of the message link below. It works now.? On Sun, 16 Feb 2020 at 4:39 PM, hwalker<herbwalker2476@...> wrote: ? I agree with Kurt that the NanoVNA's
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Larry Rothman
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#10974
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Re: nanoVNA Maximum Impedance Measurement (Folded Dipole example)
I agree with Kurt that the NanoVNA's inaccuracies above 300 ohms are not that bad. I had the same frustrations with an HP Agilent 8753C Network Analyzer with 85046A S-Parameter Test Set. Once you get
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hwalker
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#10973
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Re: Android app cable question
Since my phone has a MicroUSB,. I just ordered this one. If it works, then I may try to find a way to update the wiki (?) so others can have one to go to directly. USB C to Micro USB OTG Cable,
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Kayak
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#10972
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Re: nanoVNA Maximum Impedance Measurement (Folded Dipole example)
Hi WB2UAQ I do not agree the NanoVNA is that bad but rather think you measurement setup is bad and for tht ametter the calibration. You might forget that if you read the R+jX with the NanoVNA the
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Kurt Poulsen
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#10971
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Re: Android app cable question
Yes, but I used this one https://www.amazon.com/gp/product/B07QKWKBQC/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1 As it also can power the attached device (NanoVNA)
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Gary W9TD
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#10970
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Re: nanoVNA Maximum Impedance Measurement (Folded Dipole example)
There are a few reasons why the NanoVNA is not that accurate for high impedance. 1. The resistive bridge doesn't do a great job at exploiting the dynamic range of the SA612 mixer. The maximum input
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Daniel Marks
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#10969
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Re: Android app cable question
On Sun, Feb 16, 2020 at 08:14 AM, Kayak wrote: just ordered a "ugreen" otg cable from amazon. It is micro-usb to usb-a female, into that I guess I plug the usb C cable from the nano
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hwalker
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#10968
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Re: Android app cable question
will this cable, if used with the usb-c cable that came with my nano-vna-h, allow OTG communication? https://amazon.com/gp/product/B00LN3LQKQ
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Kayak
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#10967
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Re: Android app cable question
interesting and something to keep a look out for. I ordered one from amazon and I can plug the phone's regular micro-usb cable into it. come to think, maybe that wont work... jeez... as to your RFI
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Kayak
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#10966
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Re: PL-259 calibration
Correct me if I am wrong, Once calibrated with those 259's than it should't matter ???
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N8AUM
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#10965
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Re: Android app cable question
thank you just ordered a "ugreen" otg cable from amazon. It is micro-usb to usb-a female, into that I guess I plug the usb C cable from the nano
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Kayak
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#10964
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It is working!
Thanks to Larry for getting me the AA flash. I was pleasantly surprised to see how well this little box works, The readings after calibration were dead on the money. Very glad I did not toss it in the
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Bill
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#10963
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Re: nanoVNA Maximum Impedance Measurement (Folded Dipole example)
I found that above 300 ohms or so the nano has trouble with accuracy. I used a GR-1606-A to measure an impedance and then compared that to the nano and as the Z got higher the accuracy diminished.
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WB2UAQ
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#10962
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Re: Android app cable question
Out of sheer surprise, I found out that the cable- I had bought thinking I was going to use it to transfer some pix from one smartphone to another - winds up being perfect for a patch between my "H"
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David Fragale <DWFComm@...>
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#10961
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Re: AA flash
Larry, I greatly appreciate that advice because, believe it or not, I could not find that info on the the Wiki or on Hugen79's Github pages (which are Greek to me). I didn't find any indication of the
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Nbridgema
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#10960
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Re: Android app cable question
You need a ¡° on the go¡± cable (OTG)
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Gary W9TD
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#10959
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Android app cable question
hi all, I couldnt find in the wiki. I have a Micro-USB on my phone so bought a Micro-USB to USB C cable from amazon and the app will not see my nanoVNA-H (from noo). The cable did say for data so it's
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Kayak
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#10958
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Re: #nanovna-h4 stops at boot screen
#nanovna-h4
On Sat, Feb 15, 2020 at 08:06 AM, Russ@va3rr wrote: So, I received notice that my H4 was shipped by China post yesterday. Do I need M3 sized washers to address the display issue?
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hwalker
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#10957
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Re: #nanovna-h4 stops at boot screen
#nanovna-h4
So, I received notice that my H4 was shipped by China post yesterday. Do I need M3 sized washers to address the display issue? tia de va3rr
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va3rr
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#10956
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