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Yes, that is the reference choke...

Is this the reference to what you are trying to do? https://www.dj0ip.de/open-wire-fed-ant/balanced-line-choke/

Hi The choc of john its exactly an 1/1 balun made by a lot of ferrites, measuring a balun with an NanoVNA on a chack its a thing and results of balun mounted with a dipole antenna was a different

I think this is not correct in this case, Nizar. Measuring the choke is not measuring a transmission line with specific characteristic impedance that needs matched; it is more like measuring an

I wouldn't really describe this as a "common mode" (although that is used) - it's really better conceptualized as a third wire which is connected to the feedpoint, as Roger said. As noted, the choke

Users of a Maxwell or W2DU choke need to be aware that the effectiveness in reducing common mode current is not directly related to the magnitude of the impedance |Z| or S21 loss that they measure

I had bought one off ebay and it arrived in the smallest possible box, and when I took it out of the box that switch was at a rather odd angle, and did nothing. I returned that one, no issues with

Hi S11 Smith measurements or S11 IZI is also possible , it should have higher then 1500 Ohm as mentionned by the paper , no care with one wire or two wire connected together , it should be

I find the jog wheel quite useful for moving the marker. Alternatively you can use the Search Minimum function in the menu to find minimum SWR point in the tracing. I have not opened the casing for

Ooooopps...... I looked at the picture but saw what I expected: Coax. Thanks, Stan, for bringing this to my attention. Test just like my common mode chokes on toroids. Either or both wires

The jog wheel is an a control that allows an alternate way to bring up the menu and select the menu items. So if you are happy with doing it on the touch screen, you are not missing much. There are

In this case, Dave, if you look at his picture, he is using two wires for the choke conductors, not a coax. So either or both wires together should work.

To clarify, it's a NanoVNA H (classic) and matches the image for a good model in the Wiki. -- --- Do Justly Love Mercy. Walk Humbly.

I have a NanoVNA (2.8" screen) from about 2020. Overall it works well, but the Jog Switch doesn't do anything. The touch screen works fine, it calibrates OK and measures SWR with ease... but the jog

Since the center conductor closes fields to the interior surface of the coax shield, it does not interact with external fields. Therefore, it's only necessary to connect the outer shield between the

I do a 'loss' measurement rather than an impedance measurement. To do this, do a 'through' measurement (S21), either on a single wire, or both wires together, connected to the center pins of the

I have made a Maxwell choke for my ladder line feed to my doublet. I would like to check the common mode impedance with the nanovna. Do I just use one of the wires for the reading or both? A

On Sun, Apr 13, 2025 at 02:14 PM, CLIFTON HEAD wrote: Hi you con download the nanovna-App at https://github.com/DiSlord/NanoVNA-App/blob/main/Win32/Release/NanoVNA-App.exe some time is sufficient

I have problems with the NanoVNAsaver this would be helpful. The app that comes up is under development I see nothing more. Can you please give a link for what your talking

Mark, If you use NanoVNA app (not NanoVNA Saver) you can remote the screen to your PC. If you have a projector or large TV display then your audience can see what you are doing right on the NanoVNA