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Herb, it seems to me that a half-way around the smith chart is 1/4 wave length. Isn't it? )))

Herb, This is an eye opener for me, it appears that at start NanoVNA-Saver is using the C0? calibration of NanoVNA, untill now I thought these calibrations were independant. I just made a new 100

Oristo, thanks a lot! I will try and let you know, best, César.

If nanoVNAs had BlueTooth, then they could also be controlled by iOS apps. There are fairly cheap BlueTooth modules with programmable microcontrollers and also fairly cheap USB host shields. Firmware

added to /g/nanovna-users/wiki/Application-Notes#Collected-wisdom

Hi Hans - see /g/nanovna-users/message/10215 It will be, after clearconfig

Before all that, check for SMA connector integrity.

Hi Cesar - I suppose that your issues are related, and I suggest that the problem is/was corrupted calibration data area which has been my experience with first calibrations with some new firmwares.

Thanks Herb for confirming my suspicion. I've looked at the specs once again: VSWR: 1.05 + 0.008 f (GHz) max @ DC - 18.0 GHz, 1.30 max @ 18 - 26.5 GHz so I would expect 1.30 at frequencies above

Hello Rudi, hello Oristo, thank you very much for your reply! If I use i.e. RG58 with a length of abt. 1m I don't see the problem as well due to the high loss of this cable (RG58 1m.jpg). But if you

Hi all, I just got my NanoVNA-H 3.4 (official version via alibaba/Maggie). Generally it works quite well, but I find two issues: 1) SWR reading shows always 1 across the entire sweep range, from 50kHz

Hello all, Just flashed firmware 0.60 by Edy555 in my NanoVNA ( https://github.com/ttrftech/NanoVNA/releases ) and advise is clear "config" NanoVNA. I searched in the menu and manual of the NanoVNA

On Sat, Jan 25, 2020 at 10:01 PM, Bob Albert wrote: "... When I measure 50 Ohm coaxial impedance with the 1/8 wave method, I always get 50 Ohms. I tried some 75 Ohm cable and still get 50 Ohms!.."

Bob, On a 50 ohm Smith chart, the bottom (6 o'clock) location will always be -j50 ohms. The trick to measuring the cable impedance is to adjust the CW test frequency so that an open cable measures as

wrote: Did you fit a battery before trying to use it, or just use it on a USB power adapter? Dave. Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...

On Sat, Jan 25, 2020 at 09:51 PM, <tonyg1hmo@...> wrote: I saw the 'save'menu item but as it was under 'cal' I wongfully assumed that it would save just the calibration. I have just saved a cal

My company makes VNA calibration kits. I don't measure the DC resistance at all - I just ensure that the return loss meets its specifications. I see so many people on here believing that they are

On Sat, Jan 25, 2020 at 07:55 PM, Larry Rothman wrote: Hugen's H4 unit with the 4 inch display already has a serial port available in addition to the USB for use with additional peripherals like wifi

When I measure 50 Ohm coaxial impedance with the 1/8 wave method, I always get 50 Ohms. I tried some 75 Ohm cable and still get 50 Ohms! When I use my old method of adjusting the termination it works