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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.

*VE2PF> "Anyone ever seen a USB controled RF generator?"* https://signalhound.com/product-category/signal-generators/ Vy 73 de Darren G7LWT / AK4DB

I meant 5.11.2, but anyway: Remove the ==5.11.2 from the PyQt5 line :-) -- Rune / 5Q5R

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

I have one.? I am happy with it, except that the USB connector is only soldered to the circuit board, rather than screwed to something solid.? I read somebody's report that the connector had come

Hi all, I'm installing the Linux version of nanovna-saver on a netbook with a 32-bit Debian 10.1 installed. I have installed all the required packages but when I give the command python3.7 -m pip

Garry Thanks for the feedback. I tested also with a better semi rigid cable. The model finds a somewhat different R, I guess the cable has a bit different impedance but the imaginary part is the same.

To analyze possible confounding factors, modify: main.c cmd_vbat() - chprintf(chp, "%d mV\r\n", vbat); +/* needs adc_stop(ADC1); ?? */ +chprintf(chp, "%d %d\r\n", adc_vbat_read(ADC1),

No, this is TRACE 2 baseline marker :)

Hi Erik; I think your assumptions are incorrect. To achieve what you are attempting requires your test cable be free of imperfections. In truth, the cable is not likely precisely a constant Z0 equal

Kurt suggested that very good cable is wanted, e.g. airline. I notice better results from LMR-400 than RG58 or RG316

After calibration with the correct calibration error parameters, a 1 meter cable connected to the reference plane with short and open at its other end, should give perfect circles spiraling inwards in

QRP RX recently updated his README: https://github.com/qrp73/NanoVNA-Q/blob/master/README.md

Bob, https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20191030105308&SearchText=IP5303 But be careful - some vendors charge big $$ for shipping.

Where to buy IP5303?

Thanks for the image, KVR5 Your hand is steadier for soldering than mine.. @QRP - does the small red mark next to it signify bad hardware?

That's exactly what I do at LC. "You can also connect trap to hot ends of both CH0 and CH1 and do S21 measure without need for coil adapter. It worked for me when I was unable to detach trap from

IF your reply DID NOT start with put-down I would reply....

IF you would have looked in the Files and Wiki sections of the forum - all of your questions would have been answered except #1.There is no trademark - only a copyrighted name, owned by edy555. Check

Sure, but one fixed LPF suffices, rather than LPF tracking swept square wave.