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Some of you may be familiar with the blog of an Australia ham Owen Duffy. https://owenduffy.net/blog/ He posts on a wide range of topics and is technically quite knowledgeable. He "lurks" on this

That's more about measuring the amplifier's output impedance, I think the OP is looking for amplifier input impedance. Here's what's great about the NanoVNA - There's going to be people who figure out

Hi David, but the capacitance of the internal windings of a chip inductor are usually unknown.Of course after you have measured the SRF, you can then calculate it.Kent(I have fought this problem for

There is an excellent WIKI on this site. There is also a beginners guide to using the NANOVNAs. There are even a few good YouTube presentation available in the archives of this site. Dave - W?LEV

If you know the capacitor value, calculating the inductance from the resonance formula is trivial for any calculator. Just like the Grid Dipper! 2 f = 25330 / (L x C) f in MHz L in ?H C in pF This is

On very handy reading when making a wide frequency sweep of an inductor,is that you easily see the jump where the inductor is self resonance. You really don't want to use an inductor above it's self

d.u.t. is old cable or, perhaps, it's cable with an unknown history. Looking at it with a megger first might be considered. +++++

Is the tuner between the source and the amp, or between the amp and the load? But it's telling you more about what impedance the amp likes, not what it really is. Kent WA5VJB

Hi Dave, Ok I'll try both methods and see if it comes up with different answers. Now is there anywhere a he he he "Video" or a written step by step etc, on how to do the smith chart way? Joe WB9SBD

Agree.? Measure it directly.? Using the method in the vid gives the capacitance inductance product, but not the individual values.? You still need to know the value of one of them to measure the

What about connecting the amplifier to a dummy load thru an antenna tuner. Tune for minimum SWR. Then use the Nano to read the impedance of the tuner/dummy load? Joe

Is everything these days a YouTube "presentation". I'm not knocking what is presented, as the theory is sound and is rather reminiscent of the setup employed when measuring inductance with a grid dip

While an interesting measurement, unless the amp is powered, the characteristics of the active device will be way off. Now when powered (A learning experience from years ago) there will be quite a bit

I found this video, It seems like maybe a better way? https://youtu.be/3LOEhvFII6c Thoughts? Joe WB9SBD

IT would help to know what amp you are looking into with the Nano. I have been able to check and tune mine with the power off by manually closing the keying circuit

But this internal calibrstion format

Use console data command data 2 data 3 .... data 6

Hallo all of you, Do you know if it is possible to download the calibration files from the naanoVNA to the NanoVNA Saver? I understand NanoSave Saver can use the device (NanaVNA) calibration... . I

I think you need a low frequency to determine the inductance (as say you know).Say between 10kHz and 200kHz? The log(|Z|) curve in a log(Freq) should go up in a straight line (NanoVNA Saver can

I remove first message, for download last firmware need use file section /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware Note: firmware pack contain zip archive for