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On 6/26/21 4:02 PM, Kent AA6P wrote: > I didn't initially notice Larry's comment that pulling the USB cable extinguishes the Battery LED. My NanoVNA-H4 does not operate that way so maybe the

I didn't initially notice Larry's comment that pulling the USB cable extinguishes the Battery LED. My NanoVNA-H4 does not operate that way so maybe the difference is the FM5324B chip. The Battery LED

If you want to do full two port forward and reverse measurements the VNWA-3SE and LibreVNA supports this feature. The others do not. SDRKits has excellent support and the LibreVNA looks impressive.

Thanks for the comments, Jim - and for the potential offer. Yes, they nano 2 docs specifically mention that it cannot be used for measuring crystal parameters. I had been looking at a LibreVNA - I

NanoVNA-H and NanoVNA-H4 firmware https://github.com/DiSlord/NanoVNA-D/releases/tag/v1.0.64

Hello Art Parris! You have not written what a unit You have. Is it NanoVNA- H4? Pressing function wheel+ turn on = DFU mode with black screen. Now You can flsh new FW with program DfuSe. Best regards

I upgraded the firmware to 1.0.39 and decided that for my use, I liked the version that was on it when I purchased it. When I hold down the function wheel and power on the screen remains black and

I may be wrong but those appear to be wirewound resistors. They will act like inductors at RF. To prove this, create a dummy load with just those resistors and measure with the vna and compare with a

You have a S21 plot, but isn't your circuit a single port? Or are you putting R, L, C in series between center conductor of

Latest Findings with my Nano VNA device June 26 de k3eui Barry Each week I learn more about what the Nano VNA can teach me. We all quickly picked up that this device can measure SWR on an antenna. But

Hi John, This sounds like a really nice idea! I do have a SDR-Kits VNA 3SE, but I won't offer to lend it to you since I am in Sweden. However, I am interested in following the procedures and results

Hi Gyula, I hadn't seen those references before ... a bit complex for me ... I have seen some of 'joeqsmith' stuff before. My interest is in making sure that I am using this tool (ie nanoVNA)

The SDR-Kits software is more refined.? Their calibration kits are of higher mechanical and electrical quality. I use it for things like sorting crystals for ladder crystal filters and LF/HF tasks. I

Thanks Larry and Richard for the help. It looks like my NanoVNA-H4 is operating normally although the battery LED only flashes when the voltage is very low. The battery LED is Blue on my NanoVNA-H4

I'm as interested as anyone else who might have one to know the accuracy and reliability of these affordable VNA's, whether nano- or the one from SDR-Kits. I have a variety of VNA's available but am

Kent, I haven't opened my 1 year old H4 lately but the led flashes when charging and is on steady once there is a full charge. Pulling the usb cable extinguishes the light.? ... Larry On Fri., 25

My NanoVNA-H4 has a FM5324B for the battery charger and 5 volt boost converter circuit. The schematic shows a FM5401. Does anyone know the difference? The datasheet is not written in English. I'm

Thanks to all.? I will go start layout something in Kicad based on QUCS or Ansoft. Thank, Jimn8qoh On Thu, Jun 24, 2021 at 2:29 PM, Dave WB6DHW<dave@...> wrote: Zack: ? KICAD is free and will

Thanks to all, especially DaveD, Clyde and W0LEV. I have joined the "-F" group but will reply here for continuity. I am still learning but the F group has given me some specific insights (serial