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Tim, If you haven't used it in a while, you might want to bring it up to the latest version of firmware - use DiSlord's releases as he has made improvements and bug fixes. You can find new firmware in

Hello Bill, Great to see you are having fun with this. The NanoVNA is such a wonderful piece of kit. As others have said here, you may not have to sweat this too much. The 1/4 wave whip on most

You can also look at ZPlots, by Dan Maguire, AC6LA, which I personally find more user-friendly, and perform the same analysis. RigExpert’s AntScope 1, when used in consistent fashion, will provide

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Hey Roger, Thank-you for your reply and the transformer info. I was aiming at what I can do with AntScope using the vna, either with nano-saver or on the device itself. 73Phil, WF3W

This is what I do, but I don't store it in the NanoVNA. I store it in a PC program (NanoVNA-Saver) as well as a .s2p file and then use scikit-rf to do the processing.

I agree with you that this "de-embedding" the cable method is the most accurate and only needs to be done once for the cable being used. Then the cal file can be saved for later recall. The "edelay"

Phil, If you like AntScope2 you can use it with your NanoVNA-H4. RigExpert added support for the -H and -H4 some time ago. Go to Settings and manually connect to the NanoVNA Com port. Some features

Yet another method is to measure at the shack end of the feedline. Then, using SimSmith on your PC, propagate what you measure back to the feedpoint. You must know the parameters of your feedline:

The normal way to do it on the nanovna is a bit different. You attach the near end of the coax to the nanovna, then calibrate (using the open/short/load calibration loads) at the far end of the cable.

Phil, From what I've seen on the various write ups and Youtubes, you are able to determine the length, loss and any breaks in a coax by shorting the far end and using the 2nd VNA port to determine the

The AntScope2 software by RigExpert allows the user to add or subtract cable and then make a series of measurements. There is a database of cable types (RG-58, LMRxxx etc.) to choose from. You select

Roger, Martin straightened me out, got it upgraded. But, special thank for your document. Much needed. 73 Paul W1BIU

Matin, Thank you, that's what I needed. Upgrade went like a Qiuck Brown Fox! 73 Paul W1BIU

Paul, Hugen is the manufacturer of the NanaVNA-H4 and he tracks DiSlord's firmware release and periodically issues updates for your NanoVNA. You can get his recent update here >>

Just download the NanoVNA-H4.bin file and send it to the NanoVNA-H4 instead of the build/ch.bin file. $ dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D NanoVNA-H4.bin

I downloaded NanoVNA-H4.dfu to my Macbook, and have dfu-util installed and working from a Terminal screen, as I used it on my TinySA. The only instructions I find for command line are: $ dfu-util -d

On 12/8/22 8:23 AM, William tunna wrote: > Thank you for the highly detailed response Bob, I have indeed got the shielding from the coaxial soldered to the strip on the top of the fuselage and the

A typical dipole made with relatively thin conductor has a 2:1 bandwidth of roughly 10% or ±5% of the center frequency. Your total bandwidth is 136 - 117 = 19 MHz Please note this is not mHz which

Thank you for the highly detailed response Bob, I have indeed got the shielding from the coaxial soldered to the strip on the top of the fuselage and the centre core soldered to the strip going up the