On Sun, Sep 4, 2022 at 11:56 AM, Tish wrote:
Hello Everyone.
I'm planning to buy my first NanoVNA for antenna SWR measurements (2m/70cm).
Where I live the only reasonable option is zeenko store.
Most of the time I'll be using PC software and my question is if it worth it
to pay more for H4 v4.3 (~86USD) version over H v3.6 (~50USD). I know that H4
is better, but that difference in price seems a little steep.
Thanks, tcs.
If all you are on a budget and only interested in is SWR measurements the H v3.6 will do the job. However the bigger screen of the -H4 and the fact that it can record screenshots to a SD card makes it worth the extra money.
You have to be careful when connecting the NanoVNA to a PC. The USB cable and the PC are connected to the ground of the NanoVNA and hence to the shield of the coax cable. So they become part of the antenna system and your measurements may be affected. This is not a problem if you don't have common mode current on the surface of the coax shield but in some cases you will if the antenna system does not have some type of RF choke. The way to tell is to observe the NanoVNA display with and without the USB cable attached and see if it changes.
Roger
Roger Need