Oops, I had written out some stuff about the NanoVNA, and thought it got posted - but it's not here.
Pretty much any of the units you find for sale will work all right.? There are many clone manufacturers - the nano is not copyrighted or patented, it's "open source" and freely available.
If you are going to use it outdoors, which seems very likely, you should get the NanoVNA-F.? It has a very different display screen, and is much more readable outdoors than the other models.? I started with a cheap 2.8 inch clone, but it was pretty much impossible to read outside when trying to tune my Butternut HF6V.? I finally bought the -F and it's much better for display.? It's a 4.3 inch TFT, although I don't remember the screen type for the others.
The -F is also about 4 times larger and 4 times heavier than the 2.8 inch models.? It has a much larger battery, which adds weight, and a metal case.? My 2.8 inch has no case at all, just 3 boards stacked together.? But I still use it - it's nice and handy.? Both (all) also work nicely when connected by USB to a PC.? There are at least 3 PC applications for use with the nano, and they add even more features, like screen shots, and saving data to disk.
You WILL need (several?) adapters as well.? The NanoVNA has SMA connectors.? I bought adapters for male & female SO-239 and BNC as well.? And a "Pomona" style adapter for BNC to binding posts, enabling connecting wire antennas, toroid coils, tuned circuits, etc.
--
Doug, K8RFT
