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Just open it up - its only 4 screws. You will see the board version on the PCB and also will see if D2 is installed or not. Mine arrived a few days ago. PCB is v3.3 and the firmware was dated November

Hi Alan,You most likely have hardware version 3.3 which is OK. V3.4 is the latest and that came out in Dec. You should update to the latest firmware that came out over the weekend. Please review the

Hi Gyula Eric provided the solution, I was basically saving and reusing my existing firmware, but all sorted now, so thanks to all for your help. Dennis G8IMN

Hi Eric, Thanks for your experiments to improve the nanoVNA. And buy some flux remover to clean up the mess Reinier Op 20-1-2020 om 17:31 schreef erik@...:

Not sure why you created a rtf file for the screenshot, the result is poor quality, the details are unreadable.

Just for reference the locations of the resistors you have to change -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK

I got a Nano-VNA-H off eBay for Christmas. It has a black plastic case with a Q-code on the label that just seems to contain nanovna.com according to my iPhone. The label also has a serial number

I've been checking my coax using NanaVNA Saver 0.2.2-1 on a NanoVNA-H with Hugen 0.4.5-4-g96e7efe firmware. I have a piece of 75 ohm Commscope F-11 coax going to a junction box in the yard, I believe

Nick, I have a "beautiful" Flat Screen Sony, it was a Christmas gift from a dear lady friend. Back when LCD flat Screen Monttors were $250+. I was living in New England and left there 14 years ago. It

Sorry, I think I got it wrong. Then the ST-Link v2 dongle remains.

If you don't recognize it, you can use USBDeview Utility to see what's preventing it. If your mouse and keyboard are both usb, do not delete it! Delete and reinstall the troublesome or unnecessary

Its chinese new year now. The whole of China is on holiday Try next week -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK

Hi Dennis, To date, I've only upgraded the firmware once with the ST-Link dongle because it was in my account for a different reason. I had no problem with that, otherwise someone would recommend it

I would like to purchase one using paypal..as others have done..sent two emails to Maggie king with no response ?

Thank you both for the information! I think my issue may be a bit different (maybe) because I am able to enter DFU mode on the nanoVNA, it's just that the DfuSe Demo software no longer recognizes the

I checked the content of this blog and some of the issues mentioned come from the wrong shield of the bad clone. Some modifications may not apply to a good NanoVNA. Our manufactured NanoVNA-H has good

This may be a stupid remark but: The DFU "Upload" is for making a backup of your nanoVNA flash memory to you PC Use the "Choose" and "Upgrade" keys to update the firmware -- NanoVNA Wiki:

Hi Guyla, I'm sure it's connecting with the pc, it works with vnasaver, and when placed in dfu mode, shows up correctly in usb devices, also the upgrade software shows complete success. Dennis G8IMN

I measured the resistors and the 56 ohm resistor is actually 55 ohm -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK

That is abt the Tx output inpedance not the RX Jos Op 20-1-2020 om 14:24 schreef hwalker: