Most aliexpress stores are selling clones, I know of only two stores (in addition to the Tindie store) that get their V2s from our manufacturing partner, which is "KaisayaHIFI audio Store" and "LusyaTechnology Store", but aliexpress sellers do switch sources often so I can't say these two stores are always going to be selling "original" units. KKmoon, tomtop, and the *tool stores have always sold clones.
However, most clones nowadays perform fine. V2 design is open source so there are many (I think at least 5) clone manufacturers. If you are curious, post a high res image of the bottom side of the board, and a zoomed in picture of U401 like here:
https://imgur.com/a/BMDyw3p and I can usually identify the manufacturer.
@Owo Just out of curiosity, the current draw seems to cycle between 350 to 390mA, what causes that? Maybe the lower parts of the frequency band are using more parts?
As others noted the text on the display is way to small unless I'm using a headband magnifier (which I need to hook up the U.FLs
)
Not sure, might have something to do with ADF4350 switching in/out between bands, newest firmware turns off the ADF4350 when not needed.
There will be a 4 inch display version soon, the firmware support is already there and it's just a matter of reworking the PCB layout for the larger size. If you are using the VNA on the bench and don't care about portability, you can already swap out the display for a 4inch one like this (search "ST7796S", make sure to get one with the 14-pin header and touch support, and you will also need to update the vna firmware):
![NanoVNA V2 aka S-A-A-2 1004665-0](https://www.eevblog.com/forum/index.php?action=dlattach;topic=243830.0;attach=1006926;image)