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Hello Pierre, Yes, what the others have said, your hand changes the loading on half the antenna, both with HT and Nano. If your goal is max range mountain-topping, you can easily make a much better

I'm probably one of those rare birds who actually uses twin-lead VF and Zo. There's about a 30 foot run of coax from where my doublet's window-line terminates on an outside wall of the house to the

The coax braid/ground is connected. I should elaborate that I see higher than normal readings when testing many different antennas. I just tried flashing back to the 0.7 firmware and get the same

Ground is connected?

I have one of the original type NanoVNA. The connectors are on the end, not the side. Anyway, I upgraded the firmware several months ago to the 0.8 version. Ever since then the SWR measurements always

I us a 13 buck case from Harbor freight.Mine holds 4 cables (sma) and adapters for PL-259 and SO- as well.6 calibration plugs.Neat

I also added a tiger tail radial to my ICOM HT. Lesson well learned. Make sure you cover the exposed end of the wire before use. I was too eager to check for signal improvement, keyed down the PTT

As previously mentioned, the problem is because of the lack of a 'ground plane' or return circuit to the nanovna (or HT). Search the web for "tiger tail" or "rat tail" and ht or handheld radio.

They sell ready made sun shield or sun hoods for smartphones, tablets and laptops. The design is three sided with the fourth left open for screen inputs. Made in multiple sizes and places like Amazon

I had the same problem, and after trying many times, finally added a NanoVNA-F to my test instrument collection. It's much better outdoors, but still not perfect. And it's more expensive. Indoors, I

Hi Roger, Setting the sweep points to 101 fixed the issue. Thank you for all the tips! Max

My prefered way is to look at the smith chart. When wiggling the connector/cable, the smith chart "goes wild" with a bad connector/connection. a good connector shows a stable image. You could also use

Enviado desde mi teléfono Huawei -------- Mensaje original -------- De: David Eckhardt <davearea51a@...> Fecha: mar., 2 mar. 2021 2:26 Para: NANO VNA <[email protected]> Asunto: Re:

Good point and an argument for using the guitar pick style of stylus. DaveD

I would think that any solution would still have to allow access to the touch screen. Ed

You are so correct, Don! I really don't care what the impedance or Vp is. Just parallel wire transmission line with low loss pretty much independent of SWR. You hit the nail on the head. Dave - W

Speaking of which - I saw a Hack-a-day article a few years ago where someone actually removed to top polarized surface of an LCD screen (very carefully) and made what looked like glasses out of the

One easy way of determining which end of a cable is bad is to connect the center connector to a wire and drag it across a portable radio's antenna. The good end will produce a lot more static.

interesting, but I'm not sure I buy his antenna test fixture: 1) in practice people hold the ht (or it's next to your body with a mic/headset) 2) he has no choke on the coax, so the coax is "part of

When you put the NanoVNA in CW mode it generates a square wave at that frequency. So you have a fundamental and harmonics of that frequency. I don't know what you mean by using the NanoVNA as a