Any of them. The ones with a bigger display are easier to read.
But all of them can do what you’re looking for.
The other thing to look at is frequency range, some have a wider frequency range on the top end.
And connectors and cases - The originals have SMA connectors, some new versions have N connectors and a beefier case. (Which does cost something). I use 6” SMA-UHF and SMA-N jumpers rather than adapters, so the coax doesn’t snap the connector off the NanoVNA.
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On Feb 5, 2025, at 17:41, CLIFTON HEAD via groups.io <aecret@...> wrote:
?What is a good NanoVNA to buy for do antenna reading like SWR, VF and Length of coax cable type work. Also, location of short in the coax..
