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Yes. When I commented "clean" the copper from beneath the inductors, I imply no copper beneath the component(s). Yes, that will introduce a slight impedance bump in the line. However, even a bit of

I know the NanoVNA H4 has a TDR function because I've used it. It isn't called that in the menu and is a little tricky to figure out. There is a Youtube'video that describes its setup. Also message

Haven’t bought one yet but I’d like to make sure I get a version capable of the TDR addition. I’ll have to figure out how to add it if necessary after receiving it. Thanks.

Stan and Thomas.. Thank you! The menu is very helpful! Got a whole lot of learning to do, i'll be fun! -- William, k6whp -------------------- "Cheer up, things could get worse. So I cheered up

Dave, That's very interesting. That is what I came across the datasheet of the capacitors I bought. Look at the picture, I think that's what you're talking about. Unfortunately, it is not mentioned

Dave, the first photo is with the 10pf cap and at 150mhz it measures 10pf. Since you mention measuring all components, do you have any tips on getting a 50ohm match on the inductor at the desired

When constructing filters, I ALWAYS measure every component before building the filter! With that, I seldom have to do ANY tweaking with the completed filter. If your first image is without anything

Zack, Here's a link to the filter I'm building. It's not a chebyshev, there was an article in QEX about it comparing the two. https://github.com/F6ITU/k_zolotarev And the qex

Where did you get the filter design you are using? Playing around with my filter design program, I found it appears you are using a 7th order Chebyshev low pass filter, inductor input. Possibly a

look in files section, menuand notes by bruce dated 2024, good menu map and notes

There's a lot of information here and I appreciate everyone's input- I reset and recalibrated the nanovna after finishing up the test rig according to Dave's build, i missed the copper tape on the

Success! 1. Shorted BOOTP and VDD pins 2. Connected USB-C to PC (MacBook Pro 2016) 3. Started STM32CubeProgrammer 4. Loaded latest NanoVNA .HEX file 5. Started Download 6. Success! NanoVNA working as

I'm not aware of an updated menu structure map, nor of a consolidated description of features of the current 1.2.40 firmware. Unfortunately, it takes a bunch of time and effort to create such

I called R&L electronics today. They're going to replace the unit. A+ service from R&L.

Stan, thank you for the advice. As mentioned, I became familiar with the H4 one or two years ago (my past dims) and -- per your advice -- I did go ahead and upgrade from 0.5.0 to 1.2.4 and, my word,

Since you are dealing with SM inductors, I remembered something I've learned and practiced for a couple of decades. In mounting SM inductors it matters how they are constructed internally. The

A couple more notes: 1 - If your primary use of the nanoVNA is HF up to about 450MHz, then there is no need to buy a new model. I am still actively using my nanoVNA-H4 from 2020, and it is all I need

Gentlemen, Thank you for the recommendations: if it works, don't fix it and last year's model/FW version works fine if it works fine. Probably better my devoting my time to [re-]learning and using

I generally update the firmware whenever a newer version is available. There have been some improvements made in some of the versions that were worth having. Zack W9SZ [email protected]> wrote:

Just for fun, I fed my original post into ChatGPT to see if "she" had any insights, and here was "her" response.....a fun exercise.. "What you're describing is a fascinating experiment! It sounds