I am considering purchasing one of these VNA's Does anyone on the list have one? Is it worth the extra $100 to get the adjustable bandwidth and faster scanning features of this upscale model?

73 Dennis W0JX

Hi Dennis, I ended up with a Pro after unknowningly buying a clone, returned it, then a Plus 4 and found out I could not measure crystals or filters, returned it, and now I have the Plus 4 Pro. In my opinion, it is worth the extra $100. Even if you never plan to need the variable bandwidth, you never know when you might need it. Yes the Pro is expensive but you do get what you pay for.

Even non pro is a good VNA. Large battery and a box of metal helps.

Mark, that is exactly a question I had and your answer helps.  A quick follow on to throw out to you - exactly what resolution (frequency-wise) were you able to obtain?  E.G. could I scan a 9 MHz SSB filter and get a good data set.

73
Bob Groh, WA2CKY

Hi Leif,

Take a look at the filters in the RF Zero shop:

https://rfzero.net/shop/

73,

Paul G4KZY

On 16/03/2023 18:57, Leif M wrote:

> Even non pro is a good VNA. Large battery and a box of metal helps.
>

Hi Bob,

The quick answer is yes. The bandwidth currently has a minimum setting on the screen for 800 Hz. I am told they are working on a future FW update to take that lower. But even at 800 Hz, I was able to nicely sweep my 6 kHz crystal filters. The only picture I could find was when I was developing a 15 kHz filter. It was a work in progress but at least will show you what to expect.

The other option you have is to use the free NanoVNA SW with your computer attached and then you have the option of down to 100 Hz bandwidth. I did some comparison with a commercial VNA in the lab and everyone was very surprised how good the Pro performs.

Please see photo attached and hope this helps you make an informed decision.

mark

Sorry everyone, I read my text after it was posted. Using the NanoVNA Saver software you can achieve a 10 Hz Bandwidth with the Plus 4 Pro.