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Thank you, will get back to this later this evening, it did come in a case, if the version is not on there i will check the chip. Will let you know how it goes

From your photo it appears you have a NanoVNA-H4, (the 4 is for the 4" screen) hardware version 4.3, or perhaps a good clone. Did it come in a case, or was it just the card and screen? Most 'official'

Don Brant sent me an .s2p file to help test my plotter. It's for an amplifier with several feet of cabling. When I looked at the phase response, I knew I had found a new poster child for the virtues

Device manager just tells me best driver is already installed but all i get is stm bootloader showing up in USB devices

Thanks for the reply, nowhere on the board do i see any reference to ms,si or zk, where should i be looking? Also have installed dfuse demo but running cannot get the correct driver. Looked in the

What firmware are you trying to use? If you are using Hugen79's firmware then pay close attention to the image you downloaded. I ran into a black screen after upgrade as well caused by me mistakingly

reply. Much appreciated

I should have included in main body instead of just a lower case h in subject line, my apologies for poor description. Pic attached from board, thank you for the

shoot in the dark .. a nano vna H ?? dg9bfc sigi Am 02.03.2025 um 16:21 schrieb Tim Dawson:

Telling us what model Nano-VNA you have would be a good starting point. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

problem started when i attempted to upgrade, screen went black, foolishly did not save the old version.. now i can read the vna with stm32, it even appears to write the new firmware but still a black

Jim, thank you a lot for the detailed information. I will be able to do some surgery on one of the NanoVna gen111.taobao.com firmware, which I updated to 0.3.0m. I will have to check the schematics

The NanoVNA doesn't have a separate Source and receiver ports, so you can't do the external amplifier, coupler approach in the Rackley paper. Is there a reason you need high power for the test? (that

The NanoVNA doesn't have a separate Source and receiver ports, so you can't do the external amplifier, coupler approach in the Rackley paper. Is there a reason you need high power for the test? (that

From amfone :https://amfone.net/Amforum/index.php?topic=37502.0;wap2 John K5PRO: Before the days of plastic antenna analyzers, you either used a GR bridge or a slotted line (for VHF), or just knew the

Thanks Jim, now I understand better. So, I will build a LC tuning circuit and I will measure afterwards to adjust it. -- 73 s Christian F8GHE

I've added impedance measurements to the S-parameter plotter. It now includes the one-port reflection method and the two-port series-through, shunt-through, and Y21 methods. Y21 cancels stray port

Roger, Thanks. I thought I had replied yesterday but apparently not. Well, let me shop some 0603 resistors and ferrites and I'll come back once I get something decent. Also, my board is scrap. 1- I

Some of those techniques are more about measuring a high impedance component, so they wouldn’t work. You’re making an S11 measurement - it’s just challenging because for end fed antennas,

Jim thanks very much for your advise. During this afternoon I found these urls and now I don't know what is the best way to measure my end-feed antenna : Your or one of these : -