I used to specify test equipment way back in the late 70's and early '80's. It is amazing how much capability you can now get for a silly low cost. The only thing I would stress is that you really need to keep your start and stop frequencies as close to the target frequency of interest as there are only 200 points in a scan. Once you have narrowed down the scan range, calibrate. Some folks seem to find this onerous, believe me back in the aerospace days when I was a wee engineer calibrations were a regular part of any test set up in the RF world. Other than that, once I got past being really rusty in my recollection of using s11/s21 two port measurements and interpreting them fairly well I'm completely pleased with this device. Maybe because I recall specifying over a quarter million in gear to fill a rack in an RF test set, I don't mind a few little oddities now and then in a device costing well under $150. It's been over forty years since I last plotted a Smith chart. It is mind blowing for me to have one generated quickly and to be able to see all the complex impedances interacting. Being able to wind a fast unun or balun on an unknown but "probably the right ferrite" core and validate the frequency capabilities of a core in minutes is wonderful. Not sure how much practical application I have now that I'm retired, but I'm back to playing with antennas, an old love. Being able to scratch that itch without taking hours of cobbled together test equipment sure is nice. Probably not going to be doing any strip line or micro strip line again in this lifetime, but it's pleasing to have such capability at a very low cost. More importantly, it is a really good value, not just cheap!
| Manufacturer | Seesii |
|---|---|
| Part number | NanoVNA-F |
| Item Weight | 410 g |
| Package Dimensions | 25 x 15.8 x 4.9 cm; 410 g |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Manufacturer reference | NanoVNA-F |
| Size | 4.3inch |
| Colour | Black |
| Item Package Quantity | 1 |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | NiMH |
