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Hi S Johnson, bear in mind that there are multiple parties doing research and dev work; edy555 who made the original NanoVNA, hugen who made the version that got copied widely, and even the teams

Why would anyone buy any other than from Hugen? Support the one doing the research and dev work.

All I know is that the tracking number given to me for China post is invalid. EBay says the label has been created, but certainly nothing has moved. I am 99.99% sure that the $22 one I bought will

Well, I believe there is already a mobile app available for the NanoVNA? Having a mobile version would be fine, and I'm not doing anything to actively prevent it - ;-) - but I'm also not spending time

I've done that multiple times. I've loaded DMR's special touchscreen test firmware(#4778). Same results. It's not the firmware. I've got a touchscreen that has become defective. Thanks anyway.

the world of r.f. energy transfer... form of current or in the form of e.m.f., the "push" on the energy, the voltage. (

Hi I just got a nanovna and I am trying to updagrade firmware from Aug 2nd to the latest in a W10 machine. I boot up in dfu mode with the 2 pins shorted and white screen W10 device manager shows smt32

#43 : On the Phase @Gary O'Neil : Sun, Oct 6, 2019 at 04:45 PM /g/nanovna-users/message/4194 Dear Gary, We thank you very much, indeed, for this particular comment: "More precisely,

Hi Rune - Any consideration of mobile (iOS / Android) versions? QT5 and Python are both supported on both, after a fashion... Imagining that nanoVNA evolution forks, a low-end Bluetooth dongle

This is the unpacked picture, D2 is already installed, and the USB TypeC CC resistor is also installed. Thanks to Maggie for making a beautiful gift box for NanoVNA-H. Thru Adaptor is currently not

That's not true. If you have X not equals to zero, it means that load returns back RF energy. And it means that you have higher loss in the cable. The thing that you're talking about is that coax

I thought I gave all the info required to do the calculation. The source is on github. What else do you need?

KE8CPD, Can you confirm that when you power up your NanoVNA that you see a battery icon, and that the CONFIG => VERSION menu shows 0,2.3. Just to confirm the upgrade is taking. - Herb

Someone said these $17 NanoVNAs are probably factory rejects (hopefully only for a cosmetic blemish, e.g. a silk-screening error).

television,...no. areas in signal so about anything will serve as an adequate antenna. Just look at those rubbish "magic" all channel antennas that are peddled by hard sell artists and that appear in

Hi OK, but from the table I can't see the feedback multisynth divider ratio. Indeed above 150 MHz the output multisynth divider ratio is fixed at 4 per Si5351A datasheet. Bo

Jim, according to the AC (RF) maximum power transfer theorem, you get maximum power transfer when the load impedance is *conjugately* matched. Luckily, coax with a Z0 of 50+j0 ohms is a trivial

Ken, You hit the nail on the head. At low frequencies, at VHF and down, I wouldn't worry about picosecond delays or femto-farad fringing C's. And I bet 99% of the Nano users will be looking at SWR

KE8CPD, The group firmware repository below might be your best bet for locating the old firmware. Try the hugen or edy555 folders.

Going from your picture, it looks like the calibration didn't "take". In your picture of 50k-900M span, 50k-300M looks right, and the rest just looks weird. So I would expect it to be that you need to