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Here is a link to the guru of chokes, Jim K9YC: http://k9yc.com/2018Cookbook.pdf Al W7SYK

Added to Wiki /g/nanovna-users/wiki/13116

The best and sound information I've located in a single source can be found at the following URL. Open the 'balun' presentation. You will come away with a wealth of good sound engineering knowledge.

Hi Kevin, The choke folks are correct. This choke is used to stop/reduce the amount of RF on the shield of the coax traveling down the coax into the shack. Some folks will put a choke at the antenna

Thanks to all who replied! I will look for the versions with the SD slot & see if the android solution will work with my hardware. Hope all have a blessed new year! Joe - W4RYW

https://hexandflex.com/2019/09/08/getting-started-with-the-nanovna-part-2/ covers the setup nicely. -- Doug, K8RFT

There's lots of documentation and guides in the group WIKI. Also, check in the "FILES" section. There's also http://hexandflex.com/2019/08/31/getting-started-with-the-nanovna-part-1

On Thu, Dec 24, 2020 at 09:11 AM, DougVL wrote: Oops! > > touch "FORMAT" and then touch "R+jX" > However, I'd forgotten, but not all firmware versions have "R+jX". Many have choices such as "REAL" and

yes.. See this writeup by Jim K9YC - http://k9yc.com/2018Cookbook.pdf There are conf

IMSAI GUY on Youtube is not nearly as smooth as Alan but he breaks things down so that a 3rd grader can understand. Most of us will us a NanoVNA for an antenna Analyzer here is his short video to

I have a NanoVNA-H which I just updated the firmware yesterday from the 0.2.xxx version which came with it to the latest Dislord version, 1.0.45.something. First thing, before you do anything else, is

======== That is wrong. 21/3 = 7, so the impedance transformation ratio is 7 x 7 = 49, i.e. 49:1 To have a 64:1 impedance transformer you need a 8:1 turns ratio, in other words, e.g., 3T primary and

A common mode choke made by wrapping coax feeder through a toroid is directly equivalent to a 1:1 Guanella "balun". The term balun is in quotes because, although coaxial cable is clearly an unbalanced

You can set the property (type of value) displayed by each of the 4 traces. Touch "MENU" , touch "TRACE", touch whichever color/channel you want to show the ' the impedance real and imaginary 'j on,

I endorse this comment fully! I have worked with VNAs on and off in my working life for the last ten years or so, and I only wish I'd seen this presentation ten years ago! It is the most succinct

Hi everyone new to this group . Happy Xmas everyone. wonder can someone out there help. im going to upate firmwear on my device. version at the moment is 0.2.2-1 looking here on the group im not sure

The Android NanoVNA app also works with my old 2.8 inch "not-H4" early clone that I bought in October, 2018 (if I remember correctly). That was about 6 months after NanoVNAs became available. It would

Common mode choke, literally thousands of pages out there dedicated to the topic. Good start for ham use: http://www.karinya.net/g3txq/chokes/

I have seen desktop antenna/coax assemblies (such as for an SDR) that take the (thin) coax cable and wrap it around a small toroid about 3 or 4 times, close to the antenna. I understand this is to

Hey Pete, Indeed it is a 1:49 after all... I didn't catch that when I posted. My EFHW started out as 3/24 turns (1:8) or a 1:64... but after measuring with the NanoVNA I ended up removing 3 turns. I