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======== 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

This video by Alan on the NanoVNA is a great intro. It gets a little technical for the uninitiated but definitely worth the time of watching it several times.

Jim, Do you want to measure the impedance looking into the end fed wire itself? A 67 ft long wire from 12 inches above ground straight to a tree at about a 70 degree angle comes in about 3700 to 3900

Hello Jim, I am not an expert or experienced antenna guru - but I like my end fed half wave for 20 and 40 meters. I "sorta" modeled mine off of "Gil the radio prepper" on YouTube and also Alex's

That's Hugen the "original" manufacturer and that is only on the H4 version.

Android NanoVNA app supports (AFAIK) "V1" nano only. [email protected]> wrote:

Oops, I also meant to mention that the sellers, like 98% of all sellers, do not mention features (like memory storage, or instruction manuals) that their product do NOT include. -- Doug, K8RFT

The NanoVNA is a bit like the 'traditional' V.O.M. - Just gives readings on a meter/display. There is/are now version(s) with connections on the PC board to add a microSD card for storage, and I

I have thought the same thing ever since I got my Nano VNA. It also would not take anyone more than a few minutes because I assume we all have things we have figured out how to do and if we all sent

"Why version newer than 0.2.0 don't work on BT virtual COM?" A poetic question to which the answer is: there is no one to carry on Rune’s legacy. Happy Holidays and all the best! -- *** If you are

Unfortunatly even if I manually enter the com port, nanoVNA Saver 0.3.8 doesn't connect and issues this error: 2020-12-22 22:56:54,788 - NanoVNASaver.NanoVNASaver - ERROR - Tried to open None and

The touch screen is resistive. You can use a stylus with a hard rounded tip like those used with the old Palm Pilot PDAs. Some forum members used Q-tips.