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Roger,? If you have any old PC motherboards in your scrap box, many of them had 32KHz xtals on them for the RTC - that's where I scrounged mine from. Once installed between PC14 & PC15, you won't

DiSlord, I disconnected the battery and it is now in LSI mode. Clock now runs when powered on and I can save multiple files to the SD card. Thank you for your help and all the time you spend

Dear Chris, That worked very well. Thank you very much. I have attached the new version details. Do let me know where the update repository is available. Regards G Ram Mohan, B603, Skylark Zenith,

Knowing the λ/4 length and frequency, you can now calculate the velocity factor of the cable and can then calculate the required physical length for any given electrical length you want, with good

No V2 not allow use Dfuse, it use GD32 CPU and not have DFU mode. It use Bootloader, for load firmware. Need use or NanoVNA QT or NanoVNA App for firmware update. Need hold right button (if RF

From nanorfe.com, the suitable variant for the SAA-2N 4" is here: https://nanorfe.com/downloads/20201013/nanovna-v2-20201013-v2_74.bin 73, Chris

You have flashed the wrong firmware. Been there, done that.... Use Dfuse from STM to reflash it. https://www.st.com/en/development-tools/stsw-stm32080.html The one from DiSlord works on my SAA-2N 4"

You load fw for V2Plus4 this different device SAA2N default V2 vs 4 inch screen You can try load my firmware

My NANO VNA was working fine, all of a sudden it started to give wrong results. Option left was to update firmware I tried to upload latest firmware on to my NanoVNA SAA-2N 4" display but I repeatedly

Just tried it on a length of 450-ohm window. Realizing that: 1) An open terminated 1/4-wavelength measures as a short 2) A shourt terminated 1/4-wavelength measures as an open I guessed my line length

Thanks for the detailed info on Mix 31 and your winding tips. That is what I have in the parts box and I was pleasantly surprised to see it was better than Mix 43 and 61. Roger

A while back I built an antenna for NOAA 137 MHz satellites, and I did a detailed search for what's the best coax feedline choke for 2 meters, and determined from the manufacturer's graphs (Fair-Rite)

In rare cases nano init external mode if no external xtal (in version screen in time (LSE)). Need reset it (remove battery connector, wait 2-10sec and put it back)

No I do not have external crystal installed. Is more than one file possible using internal clock? In other post I said I cannot set time to run off internal micro clock. Firmware thinks I am in LSE

RTC clock not tick (filename depend from current time), you install external 32768 xtal on device?

I am using the latest DiSlord firmware on my NanoVNA-H4 I cut a slot in the plastic case so I can use a 32 GB micro SD card. . When writing files to the SD card I can successfully write screenshot

Thank you. An excellent article. Goes right to the heart of my question.

I suspected a ballun was necessary. I have a drawer full of those ferrites that I use to make 2m coax bead balluns. And I've made a jig like the one in your picture also, except without the ferrite. I

Hi Dislord It was available on my VNAs before. You are right , it's possible to adjust on the display but at least for my (not very steady) hands it's more of a 'try and see'. TIA Joe.

If i correct remember this not awaible in all fw But now possible quick change refrence and scale position for curent selected trace see attached image