Further to the SWR vs Resonance thread, I have started a new thread here. Have a look at https://youtu.be/-F7KYLO4Bkg?si=v6utQyiV5rKRwYPi There are some excellent comments posted as well. Should we mo

If you are going to use a high-value resistor across your transmission line, you will not only have to watch the power dissipation rating but its voltage rating in a high-power and/or high VSWR situat

Is there a reason NOT to have always connected shunt to ground (or at least between two lines) that has low DC and high RF impedance (sounds like a nice high impedance coil meets that requirement :))

It can be fun to connect a microamp meter to the antenna then watch the meter move when a cloud moves overhead. Here in Texas, when we get a hot dry wind off the deserts of Mexico, we can connect a Ne

syd/wt1v I cannot answer directly except to say, too fast. 1 step on a rug can generate in the low thousands of volts. Chip testing against static elec I did at Atari was in the 100-1000 v range. Some

I ALWAYS have my HF antennas, shield & center, or both wires, connected to ground unless I'm using them so I've never seen this problem. SO, if you don't do that then I'd suggest building a grounded p

The NanoVNA worked fine on my HF6V too. Except I was outside, near the antenna, in Florida and I couldn't read the NanoVNA screen! In the end, I added a NanoVNA-F, which has MUCH better screen visibil

And if you get a continuous shock, maybe the antenna matching isn't the problem <grin>

Syd: Just short the inner and outer conductors of ANY cable whenever you connect to an instrument just prior to making the connection and you should be fine. There is no elaborate process required, ju

I have a Butternut HF6V and use my NanoVNA on it all the time. I used the VNA to setup and tune the antenna and I use the VNA to adjust my MFJ antenna tuner to use the Butternut on 18 and 24 MHz on da

A Butternut vertical has a Q-coil at the base which grounds the antenna so there is no static build up. If you don't have the coil, put one on. It is to help the SWR on 80, I believe. Gary W9TD

Do a search on the term: protection There are a number of message threads that discuss protecting the nanovna. There is also a thread on measuring a 1/4 wave balanced line - in the how-to section of t

I've seen a number of online tutorials on how to adjust and measure an antenna for resonance using a NanoVNA. But they all seem to be oriented toward the higher frequency mobile antennas, and not the

I came across an Introduction to Network Analysis presentation by Keysight that I thought those new to the VNA might be interested in reading. It covers Transmission lines, S parameters, Smith Chart,

NanoVNA have L/C Match function (Marker->Measure->L/C Math in last firmware) This function calculate how compensate measured impedance to 50 Om

There are actually two charts as you can see overlaid, usually in two colors to assist reading. The chart on your vna is the Z plane chart. After rotating it 180 degrees it becomes an admittance chart

circle is the series circle" .... or is that back-to-front?? I've read it exactly this way in another article too. And in some other article I found it the other way around. IMHO I think it's just a n

Hi, Re this article is Point 3, Page 3 correct ?? ie "The right/constant resistance circle is the shunt circle, and the left/constant conductance circle is the series circle" .... or is that back-to-f

SimSmith is a very powerful application. It's free and can be accessed at: http://www.ae6ty.com/smith_charts.html and an excellent tutorial specifically addressing SimSmith: https://www.w0qe.com/SimSm

A nice document with a lot of good information. The restrictions on impedance matching range in Figures 4 and 5 of the Abracon white paper are shown in more detail in Figures 5.57 and 5.58 of the 2021