Upgraded NanoVNA-H4 Vector Network Analyzer, SeeSii Latest V4.4 9KHz-1.5GHz HF VHF UHF 4" Touch Screen Antenna Analyzer Measuring S Parameters, Voltage Standing Wave Ratio, Phase, Delay, Smith Chart

Nice little gadget, easy to calibrate and use, amazing how so many functions can be squeezed into something so small

I was a little sceptical about this device but it has exceeded all expectations, a little tricky to navigate the menu structure (use the supplied cheat sheet and it's a breeze), otherwise it's a great tool with an easy to read display. The only critical comment I can make is about the charging cable, it's a very cheap usb-c cable and doesn't work one way round, I use a higher quality cable and have no problems with it.

THis VNA seems to work well. I have mostly used it to measure home made Common Mode Chokes and to check VSWR for my vertical HV antenna. It seems to agree with my MFJ -259C.

I can say is this piece of equipment is worth its weight in gold, I love experimenting with antennas and this allows me to do that, I’m only using one facet of this great piece of kit and it has proved invaluable already!! Plenty of user videos on YouTube. I highly recommend the product, great value for the price, clear display screen. Really glad I went for the H4 version. If your into ham radio or even helium mining and think your antennas tuned, use this device and it will give you an accurate reading, I never rely on the manufacturers spec and always test.

a nice bit of kit.

i wash a bit sceptical about this product, but when i tested it it does exactly as described. happy for now.

Very good

Well I would have given it 5 stars but it didn’t work out of the box. After many tries I found out that removing the 4 screws holding the case together it would work perfectly. I’m guessing that the top case was making the tft screen thinking it was being touched. Having had this now for a few months. I would say it’s totally useless if you want it to work for more than just a few minutes. Very much simpler to use my array of other test equipment. Far too many issues with this one….

Excelente equipo para checar antenas Solo hay que leer muy bien su manual y una vez que lo dominas es fantastico Lo recomiendo comprar

Not the most solid build, yet not cheaply made either. This unit does the trick without bombast. Excellent value for money, accurate enough for horseshoes and easy to use. Vewry impressed.

ok funziona e fa quello che deve sono soddisfatto

Just another chinese copy of a great product, works as it should that is why I gave it three stars. Lets see how long it lasts, then, I may give more or even less stars, depending

I have read a little on these devices over the past few months, and decided that for ham radio use, if they worked as well as people seemed to think, the small size, internal battery etc. would make it ideal for field antenna work. I really wasn't expecting that much at this price. However, it arrived in a nice looking box with fitted internal compartments for cables, connectors etc. My first quick play with it impressed me. I was suspicious about using a square-wave and using harmonics for the higher ranges, but if you forgive the reduced measurement range, that actually works pretty well. Not as well as my bench VNA, but that cost just a tiny bit more. The biggest potential problem is the number of sample points. Being fixed at 101 points is rather limiting for wide-band scans. That said, its not that usual outside of microwave use that wide bandwidth scans are used/useful. If you really need that, there is software available (free) for Windows and Mac to control the nanoVNA, and with the ability to split the range into some number (you decide - how long you want to wait) of segments, and scan each segment individually, merging the results into a single view. If I had to find fault, it would pretty much be with the external components: * A guitar pick is better than a finger on that little screen, but a stylus would be better. * There is only one 50ohm load, the proper calibration procedure requires two, although you *can* use just one. * The open and short calibration loads are identical once connected or an adapter fitted. Marking these 'O' and 'S' would be useful. * The box is too nice to toss away, but lacks space for additional adapters/connectors. All that said, I highly recommend this for anyone wanting a VNA for sub-microwave use and not requiring ultra-precision. If you have never used this sort of equipment before there is a somewhat steep learning curve, and most documentation is either at too high a level for a lot of people, and assuming lots of basic knowledge, or really too low level and created by people that are maybe not really grasping what they are doing. I expect that problem to resolve fairly quickly. As an antenna analyzer for ham radio use it blows most of those costing 10 or more times as much out of the water, and is useful for other things too (like tuning filters etc.).only using for SWR across multiple bands, but beats the price on buying multiple meters.