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Sad to report that, for the second time, my nanovna is broke from RF over exposure or ESD. My question is: can I protect the input with some fuse- or similar over-load protection device? Yes, I will

Use a different USB controller on your computer and check the USB cable. [email protected]> wrote:

It connects, firm ware is the latest for the H model, i fellow the steps in the guide, the dfu demo software starts as normal starting delete phase, takes 18 hrs, now im in down load phase and its 4

Dave, Good overview. I think it is worth to add a little bit more to point 2 of the recommendations. Because in case one is measuring a reactive component at a frequency range of interest, which

Dave you'll have to swap the Above & Below in the first lines on page 2 ... 73 Luc ON7DQ

Delete phase? There is not normally a separate delete phase in nanova firmware loading. Most of the programming methods have you a) attach to nanovna in dfu update mode, b) Select and outload the new

I guess I bricked it. Nanovna H. 3 days of trying to reput the firmware back on it. Can't get it to even delete phase.

Thanks a lot Dave. Shall go through it and get back to you. 73 Jon, VU2JO [email protected]> wrote:

Okay! Great! Thank you! Yahoo Mail: Search, Organize, Conquer On Thu, May 15, 2025 at 13:35, Team-SIM SIM-Mode via groups.io<sim31_team@...> wrote: Hi Roger Thanks , I re do the

I've had several requests on reading the values of inductors and capacitors using the NANOVNAs. I've put that together in the attachment to this email. If you want to learn how it's done using the

Please let us know where you are going with this Simply trying to take the data from the graphic presentation and try to provide an appropriate explanation and interpretation. The power of any GRAPHIC

Dave, I think Alan is pointing out that I'm using port 1 data for a component measured between the two ports. True, but I'm just using the data to exercise my program, not to draw conclusions about

Please let us know where you are going with this: QUOTE: s11 measure in series mode between the channels. S11 and S22 are reflection measurements. Dave - W?LEV [email protected]> wrote: -- Dave -

Hi Roger Thanks , I re do the measure of my 25m of RG213 at 100Mhz (Span 5Mhz ) by this cicle methode see illustration below with graphical renormalized Z0 to center impedances circle around center

Does this explain the trace gap? I assume that's what you're referring to. Brian

s11 measure in series mode between the channels.

Those interested in more detail on my last post will find this article informative. The graphs at the end show what should be expected when making measurements of characteristic impedance of coaxial

Nizar, What I pointed out in my previous post is that your characteristic impedance measurements were not in accordance with well defined transmission theory. Your results showed a rise in

Yes, they can be pretty good for testing at HF if properly chosen and measured. That's exactly what I do to "quailfy" potentiometers for use at HF frequencies. It works! Dave - W?LEV

Hi Dave To be Honest , this is graphical results of my used potentiometre illustrated with NanoVNA attached screenshoots : +j3 Ohm max at 30Mhz 73's Nizar .