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Wow nice comment and i have now a better understanding of the different version! 73 Guillaume

I had a similar thing happen with the brightness on my H4. I couldn't find any information on adjusting the brightness.

Very detailed and useful work. It is a pity that the author has not optimized the pdf file, thus reducing the burden on his website. Thanks Gunthard! 73, Gyula HA3HZ

The spike at 6.5 MHz is due to a resonance of the bypass capacitors and choke supplying power to the SA612s. It's been discussed here, I imagine a search would probably turn it up. A lot of anomalies

Folks: I recently fired up my nanoVNA and was exploring how to integrate basic control into SimSmith. In doing so, I ran across the following behavior. I did a basic calibration from 50 KHz to 700

On Sun, Mar 15, 2020 at 03:41 PM, Guillaume Larouche wrote: "I would like the 4.3 or 4.0 inch display, but it's look like the F and H4 version are not the same processor, so wich one is the more

Yup, the issue with the plastic housing is a 'potenial' problem but almost all H4 units are just fine.? On Sun, 15 Mar 2020 at 8:14 PM, Ben Yuen<benyuenkc@...> wrote: I have 2.8 and 4.3 inch

I have 2.8 and 4.3 inch version. They can do TDR with updated firmware. Personally I would prefer the F version with metal case which is free from the potential problem of "plastic case" issue at this

Well, Everyone has their own personal preference. With that in mind, there is only 1 firmware developer at this time for the F version and 6 developers for the original nanovna-H (4.3). Of the

I was hoping that the ground conductivity was different so I did measurements at three places with the wire close to the same angle WRT the ground. The results were very similar so I guess the ground

Hello group, I would like to get a nano VNA ( already use great VNA at work ) to play with, but i am confusing about wich one to get? I would like the 4.3 or 4.0 inch display, but it's look like the F

WB2UAQ, Measuring antennas requires knowing what the ground is like. as it does change the result as well as orientation and height above it. I know the region and it does change depending on where

That might work if it were a dipole. for a end fed wire? The problem then is what represents the ground plane? An Endfed half wave (or any random wire) is like any antenna (dipoles for instance)

Allison, My previous comment to WB2UAQ was not about testing the 49:1 UN-UN wuth S21. It was about measuring the high feedpoint impedance of his 67 ft wire at 7 MHz. For high impedances like this

Larry I just watched your video and it does a good job of explaining the three methods. If you are interested in doing a follow-on it would be interesting to see the following: 1. Comparison between

Larry, Impedance measurement is more indirect then measuring the transformer directly. Both get you to the same point but the big thing is you have to understand what your measuring and what that

Roger, S21 to get it right really requires a known transformer or often easier two of the same back to back. That keep measurement in the 50 ohm domain and also allows for reasonable accuracy for loss

Hi Rune, I want to tell you that I have added two parts to my NanoVNA tutorial: a) Part 2: the NanoVNA-H up to 1500 (1300) MHz with examples b) Part 3: the NanoVNA als TDR (= Time Domain

I recently made a video showing how to measure impedance 3 ways with a VNA including the s11, series sw1, and the shunt s21 methods. See https://www.youtube.com/watch?v=1UbEz73FGCU if interested.

Yes, the current brightness interface is very primitive. I need to provide a more friendly operation. Thank you for your suggestions.