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Sorry should have been clearer, it doesn't turn on even with the battery disconnected.

Correct - that is controlled by the charging/inverter chip. Can you turn your Nano turn on when connected to USB and the battery is disconnected?

Hi Larry, When I disconnect the battery and plug the USB in the LED blinks as if it is charging. sorry for double post, didn't realize my other one went though.

Just make sure, as others have pointed out, that you don’t have any other wires (power supply, USB to computer,, etc) connected to the nanoVNA. 73, Willie N1JBJ

Considering that the NanoVNA is smaller than a lot of HF baluns for balanced lines, I don't think you need the balun, either (until you get up to where the NanoVNA is a significant fraction of a

On 2/16/22 11:28 PM, Bob Ecclestone VK2ZRE wrote: > I'm wondering if the correct way to measure the length of window line > with a NanoVNA is fundamentally different than that of measuring coax. > >

We're measuring impedance here. No matching transformer is needed. Just a 1:1 high common mode Z balun. From the Z's measured you determine the characteristics of the balanced transmission line OR and

Hi Brady, Did you try disconnecting the battery and powering the Nano from a USB source? Sometimes when the battery gets too low, the CPU can get into a weird state (assuming you have the battery

Hi All, My Nano VNA-H4 was sitting for a while, and after charging will not turn on. I checked the battery voltage, it is fully charged. The red LED works, not sure what to do next. Any help would be

Agree with Kevin. Very good explanation. John, wa3jrs

Bob, thank you so much for your very detailed answer. It'll take me awhile to get the ferrite and build the test jig, but I'll let the group know of my results. Thank you, again, for so generously

I have the same looking unit with the same firmware. It says it is supposed to go to 3ghz but mine only allows 2.413ghz as top end. Have you tested yours to 3ghz?

I'm wondering if the correct way to measure the length of window line with a NanoVNA is fundamentally different than that of measuring coax. I'm following the method described by Arie

Charlie, I sent you details by email.

The front end of CH1 just contains some resistors and SA612 mixer. Try looking there for damage first.... Shown here >>> https://postimg.cc/Z9R4zNTw Full schematic here >>

That would be great. Much appreciated Danny.

I also recently purchased the AURSINC SAA-2N v2.2 which I believe to be the same internally. I loaded DiSLord's "V2 480x320 v1.1.00.bin" and had some difficulty getting the screen re-inverted but got

I recently purchased a NanoVNA V2 because it has the extended frequency range to 3GHz. The firmware version is well over a year old (see attached photo) and was wondering if there are any recommended

This is a H4? Original NanoVNA RF design, just with a bigger screen? The first thing after the CH1 input is a resistive pad (I can't remember how many dB, but something like 17-20 dB). I would have

I’m no wiser after these posts. S21 does not work as not able to calibrate it. It has gone bad. Overload. Is there a fix? I’m measuring gain of a LNA as I have done many times and now the port is