Author Topic: Cheap VNAs?  (Read 850 times)

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Offline n3mmr

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Cheap VNAs?
« on: July 16, 2019, 12:54:56 pm »
Are there any cheap vector network analysers that actually work?

"Cheap" being like max 3-400 usd.
Intended purpose would be things like improving Z match up to maybe 100 MHz.
 

Offline hendorog

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Re: Cheap VNAs?
« Reply #1 on: July 16, 2019, 01:05:02 pm »
NanoVNA is the best option for that price and frequency range IMHO.
Edit: I misread the price range, this VNA is around $50 so there may be better options for $400

These are available in lots of places, this is just a random one I found.
https://www.ebay.com/itm/NanoVNA-Vector-Network-Analyzer-HF-VHF-UHF-Antenna-Analyzer-2-8-TFT-Screen/202734684273?hash=item2f33edc871:g:bWUAAOSwnoldLTco

Google group is here
https://groups.io/g/nanovna-users

The white gecko labelled ones lack shielding. Mine is like this.
Some of the black ones are properly shielded and also apparently have a slightly better PCB layout.
This is more important over 300MHz where they are operating on harmonics of the LO. Below 300MHz any of them will be OK I expect.

« Last Edit: July 16, 2019, 08:37:37 pm by hendorog »
 

Online DaJMasta

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Re: Cheap VNAs?
« Reply #2 on: July 16, 2019, 03:14:04 pm »
Can you deal with just one port and no transmission measurements?  There are a number of antenna analyzers that can be had for that budget and frequency range if you're only looking for single port measurements.
 

Offline Datman

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