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Yes, I didn’t actually look ar John’s figures - just accepted his comment they were okay. A Rosenberger female female was used as S21 thru during my test but the Dave. Dr. David Kirkby, Kirkby

[email protected]> wrote: There is obviously quite a bit of variation among them. You and Rune find them okay, I find it poor and Kurt even worse. I expect George Orwell would have said, all

Hi Kurt Exactly, the supplied open is pretty poor and has high loss. See attached Yours looks worse than mine, and I thought mine was bad enough! That is why I have not yet published my

Hello Rune, From https://github.com/ttrftech/NanoVNA/releases ChibiOS/RT Shell ch> version 0.2.3 ch> info Kernel: 4.0.0 Compiler: GCC 8.2.1 20181213 (release) [gcc-8-branch revision 267074]

Hi John The one 0.3dB is not much less the what David and I measure so the one from your lab is not optimal. A Rosenberger female female was used as S21 thru during my test but the open was from my HP

Hi David Exactly, the supplied open is pretty poor and has high loss. See attached measurement with the NanoVNA aand NanoVNA saver calibrated with my HP85033C . That is why I have not yet published my

I see on the schematic that the vctcxo has its frequency driven by the DAC output, is this used as a way to have finer frequency steps ?

Dave, I have two of the longer SMA F-F adapters, from two similar NanaVNA kits. I checked them on my 8753D. Both look reasonable to the 6GHz limit of my 8753D. Each shows a 900MHz through loss of

Sean, Rune's nanovan-saver program will measure "Q" directly by connecting the matched network and antenna to CH0 and selecting "S11 Quality Factor" in the Display settings. .Herb

What value did you measure? I just measured the Q of my ZS6BKW antenna system from the shack as 17.6 on 40m.

Hello Oristo; It is good to know this topic is being followed. I hope there are others more capable and perhaps more patient than I, and I welcome them to please chime in. It may expedite the pace of

Rune, I spent the day verifying unknown filters in my ham shack and documenting their performance using your new "Analysis" module (Tks !). I attached files earlier for typical high pass and low pass

is there any info on measuring the Q of a network and antenna? I set up an S21 test using the matched network and antenna on CH0 and a short coil on CH1, looking at the LOGMAG trace for CH1 I measured

I don’t think splitting into two will be sufficient. From what I understood from the group owner around a week ago, the number of subscribers was showing no signs of tailing off. I think we need to

I downloaded v1.1 of the Calibration Procedure and all is well until I get to Note 21. When I connect the two ports together, my Blue Line is at the very top of the chart and the readout fluctuates

Here’s a suggestion to mull over… Suppose a second nanoVNA group be initiated called “NanoVNA for Beginners”, or “New to NanoVNA” The benefits are subtle but would potentially decimate the

Kurt, You are correct. That is the very reason I used a wide-band device. I wanted to know the total power coming out of the port. I was not trying to determine the amount of signal that is being used

Rune, Here you go: ch> version 0.1.1.1-5-gd609fb2 ch> info Kernel: 4.0.0 Compiler: GCC 8.2.1 20181213 (release) [gcc-8-branch revision 267074] Architecture: ARMv6-M Core Variant: Cortex-M0 Port Info:

Hello David, I had heard rumours of there being bad Female-Female adaptors included with some NanoVNAs. I have a bunch of cheap chinese adaptors of that kind, the one that came with the NanoVNA, and

drkirkby@...> wrote: I forgot to say, the trace that’s barely visible is the thru on the left of the photograph. It’s return loss is very close to 0 dB even at 7 GHz. Dave -- Dr.