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HI to all I own a FY6900 device, a cheap but very complete generator (mine is the model working up to 60mHz). Till now I've used it only with an oscilloscope, but I would like to employ also with a

Hello Roger, I may have missed something here, but it seems to me your trace labels are reversed. The "top - SMA barrel" trace has much larger SWR ripple and a predominant capacitive reactance loop on

Two more pictures using 10 feet of RG58 Coax connected to the vertical. First Picture is with SWR Plot scale set to 0.25 per division and second picture with SWR plot scale set to 1.0 per division.

Here is a picture showing my test vertical mentioned in my above post when I had it connected directly to the NanoVNA-F using just a couple of adapters. Note in this picture the NanoVNA-F was

Hi folks, I somewhat agree with what others have said and Rogers demonstration shows one issue but let me make some additional observations/comments. My comments below ignore some minor effects due to

I suspect some inductance between your metal (?) mount and the feed line running parallel to it. Consider lengthening your feed line by a couple of feet and put a loop in it along the vertical

The ripples you are seeing are not unusual. It is not due to the antenna - it is the transmission line and/or adapters being used. . When the impedance of the transmission line is slightly different

Hi, What you are seeing is perfectly normal and simply represents the fact that the antenna feed impedance (at the antenna feed point) does not exactly match the coax impedance. It's certainly pretty

I'm not sure why the ripple is in there. I have never seen that when I do an SWR measurement. The minimum of 1.2 isn't bad, but the frequency is 406 MHz. What band is the antenna for? Is it a

That antenna is not the best with only 3 "stingers" as a skeleton image plane. It's pretty spartan! The "wiggles" you are seeing at the end of the coax reflect a small SWR on the coaxial line. The

When I am constructing an antenna, I have been using this device to plot the swr in my shop. I usually set a wide enough bandwidth to easily see the dip at resonance. In the shop, connecting this

any of the nanovna v2 models .. or litevna 62/64 dg9bfc sigi Am 06.02.2025 um 02:41 schrieb CLIFTON HEAD via groups.io:

If your main application is for ham band use, from HF to VHF/UHF (440MHz), save some money and get the H4. If you need good accuracy on bands above the 440MHz band, and above 1GHz, I would choose one

My Suggestion is https://nanovna.com/?page_id=121 Do your research. you want a device based on the Open Firmware, you want a device that supports the software on GitHub. Most of the devices are made

Any of them. The ones with a bigger display are easier to read. But all of them can do what you’re looking for. The other thing to look at is frequency range, some have a wider frequency range on

I changed the driver and problem solved! ??? Thank you! ??? Mark Jordan, PY3SS

What is a good NanoVNA to buy for do antenna reading like SWR, VF and Length of coax cable type work. Also, location of short in the coax..

I made the mistake of going down the measuring Q rabbit hole.... VE2AZX QEX article on different methods --> http://ve2azx.net/technical/Q-FactorMeas_on_LC_Circuits.pdf VNWA discussion on the topic

I discovered the problem -- it is my SD card. If I remove the SD card the NanoVNA operates normally (without changing firmware). I tried a different SC card and the problem returned. So, I need to

All, The extra copy of QEX has been spoken for. DaveD KC0WJN [email protected]> wrote: