Is it possible to somehow verify that the U551 chip is the one causing problems?

None of these are 'clones', they are all copies with slight variations. As the original design was open-source, anyone can manufacture these. All the units above are nanoVNA-H and you can use any firm

Punch out the plastic and the pins to reduce the wear of the standards. <landrjoh@...> wrote:

There is no way that I know of to do this, an amplifier is a one-way path. The gain and reverse isolation of the amplifier would not allow a useable reflected signal to flow back to the VNA to be meas

Many schematics can be found on Hugen's github repo - some as *.png or *.jpg, but you should be able to convert them to *.pdf yourself: https://github.com/hugen79/NanoVNA-H/tree/master/doc HTH Martin

No, 12k is IF used in measure. So not possible measure on this frequency or it harmonics PS in H4 possible change IF in config-expert settings menu

I checked the VNA before and after the modification and I saw no problems with it. Believe me if those diodes had an effect it would have really had a problem with the tinySA. The diodes were only a c

Hi Gyula - trying your website, I got an emoji with a zipper across the mouth and a message in Hungarian. Fortunately my google-translate has the camera option and told me that your website is down fo

Jim: As the port 1/CH0 connector already has a bridge feeding it, I am curious to understand how and why you are using an external bridge. Thanks and 73, Don N2VGU.

Well, not to discredit the hard work of any other contributor of nanovna apps and firmware but the only apps and firmware I run my nanovna-h is yours. I am surprise you think it is not used by the com

There is software out there that will not only control the relay but also store the cal values for both ports. Its free and on U-tube. I did not bothered with it,I installed it all in a box with N-con

Hi there Vladimir! I was able to correct the issue with my NanoVNA-H white Gecko, I found out that the calibration set including the feedline cable was so horrible. The 50 Ohm load came with it is not

I have posted on this before a month or so ago. You will need a very thin nut, otherwise the control buttons will disappear. Also those nuts are vey difficult to find and I would probably cut up the s

Thank you very much. Clayton Heilman Ke7ngo "The world is run by those who show up." Richard George Weingardt

Karl, Hugen's latest H4 production run now includes the SD card installed as an extra bonus. You have to cut your own slot to access the SD card. Only DiSlord's latest firmware has provisions for savi

Yes, I think it would. I am considering venturing in myself, (repars/mods, rather than construction). It would make a change from the hot air sometimes emanating from ‘er indoors. Steve L

My problem turned out to be a short between solder tracks of the screen connector, and after clearing it everything is working just fine. Thanks for this info - it might come in handy when I get a V2

I have sent a message via AliExpress so we will see. It seems to be an Aliexpress issue and a strange one since all other neighbouring countries are supported. yahoo.com@groups.io> wrote:

Hi, I have build my version of the NanoVNA V2, in short it is in a hammond aluminium case with 4" Display and 4000 mAh battery. Currently selling some on tindie: https://www.tindie.com/products/blackm

OK well maybe it was the ribbon. Because it wasn't working with the battery. But now it is. I got it. She's fully working. The888store can get bent. Thank you for your help guys. I love this little to