Electronics > RF, Microwave, Ham Radio

Seeking suggestions for new Nanovna.

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WPXS472:
A while back, I bought one of the first Nanovnas that only covered to 900 MHz. I never used the thing because I wanted to use higher frequencies, and the available software wouldn't work on my Windows XP machine. Some time passed, and someone told me there was a version that used "N" connectors instead of "SMA", and had a 4 inch screen. I bought one of those with great expectations, but was disappointed that it couldn't be used for single frequency measurements. I have spent some time recently on AliExpress and eBay looking to get a newer one. I find the sheer quantity of different ones confusing, and cannot make up my mind which one to purchase. Does anyone have a suggestion based on experience as to an exact model and vendor I should buy? I like the idea of having a 4 inch screen, but I plan on using it hooked to my laptop most of the time, so that isn't a strict requirement. I would need it to go to at least 2.5 Ghz, and be able to do single frequency measurements.

bdunham7:
I have a NanoVNA-F V2 from Rev C v0.2.3 from sysjoint.com and it goes to 3GHz, lets me set the span to zero and then indicates a single frequency and still gives me a Smith chart and graphs.  I haven't used it enough to comment other than to say that it seems to function properly after calibration.  I did connect it to a Windows 10 PC, but I don't even remember a single tidbit about the software.  The screen and case are pretty nice and the battery seems to last.  It does have SMA connectors, but I don't see the problem with that. 

evb149:
In the future there's something called nanovna v3 that is expected to have significantly broader capabilities.
That may be interesting to wait for if you can wait a while and you care more about the frequency range and
more specialized measurement capabilities than cost or immediate availability.

https://nanorfe.com/nanovna-v3.html

WPXS472:
Thanks to both of you. I will have to consider that V3. The specs mentioned seemed better than the 8714ES I have used for the last few years. I jumped at the model using "N" connectors because that was what I was used to, and they are mechanically more robust. But,  really, "SMA" connectors are OK for my use.

joeqsmith:
 
--- Quote from: WPXS472 on July 31, 2021, 10:35:19 pm ---A while back, I bought one of the first Nanovnas that only covered to 900 MHz. I never used the thing because I wanted to use higher frequencies ..
--- End quote ---

So you have an 8714ES but then bought a low cost 900MHz unit but never used it because it was limited to 900MHz?   :-DD  If you don't want to be disappointed with your next purchase, I recommend you spend some time figuring out what your requirements are BEFORE you open your wallet! 


Obviously, there's a lot more to consider when buying a VNA than just 2.5 GHz, CW with a 4" display, N connectors and support for XP.   I wonder why you have not considered the HP8753ES or even one of the older models from this series.  Even if you are just starting out and learning the basics, it may be a better choice than going with these very low cost units.   I picked up an old PNA a while back for hobby use.  It has a few things I don't like but overall, not too bad. 

If you really want to stay with low cost ones like the NanoVNA, I have a V2Plus4 from OWO's company.   I finally ditched Windows XP but suspect my software would still run on it. Of course at this price point, it is missing a lot of features.   What's a couple of bias T's and step attenuators run?  I doubt anyone expects the $200 is going to work like the $250,000 unit.  Thinking it would will certainly would lead to further disappointment on your part.  For learning some of the basics, it's a nice little product. 

Attached screen shots with my V2Plus4 set to CW at 2.987654GHz along with the output on my Signal Hound set to Real-Time.   I also made a lengthy review of the V2Plus4 and a shorter video showing some of the more recent software for it.   





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