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As usual, I found the answer right after I asked the question. One is lossless permeability the the is lossy permeability. Found the answer in a Fair-Rite printout. Larry n0sa

Okay, I have been reading a bunch of stuff on ferrite cores. My main interest right now is xfmrs for EFHW antennas. I see charts with u' and u" (mu' and mu"). I can't seem to find an explanation of

Hi All, I add some explanations. I asked Rune if he could add this graphic because it is very useful. It display curves that have exactly the same shape as the complex permitivity curves (μ'r and

Thanks for all the good links, looks like I have a lot of reading to do. I am trying to learn all this stuff and it takes me awhile to get my head wrapped around all of it. Larry n0sa

And given the impedance in series format, it is possible to convert to an equivalent parallel circuit - and vice versa.? The equivalency will only be valid over a limited frequency range. ????

You have connected the 50 ohm load to CH0 and you are looking at noise on CH1 More noise implies better isolation and that is what you want (I think....) -- NanoVNA Wiki:

Hello all, I broke the power switch on my nano. Does anyone have a part number to it? I did some searching but could not find it. Thank you Marco

I have 2 NanoVNA, one bought from AURSINC on Amazon, which I originally thought was not a knockoff, and one bought from a link provided by Hugen, that I learned of only after getting the AURSINC and

Oh - and as for the size of a larger battery - several forum members including myself have used larger cellphone batteries up to 1500mAH. You can just solder the wires directly to the + & - pins of

All lithium -cells- need to come with overcharge, overcurrent (ie:shorting its terminals), undervoltage and overtemp protection (and balancing sometimes is also built-in). And that is just that small

Larry, this is basic electric circuit theory.? Any linear bilateral complex impedance can be expressed as an equivalent circuit of two components, a resistance and a reactance.? You can express them

18650 cells (especially cheap ones ) rarely have the current capacity they are marked with. I bought 20 cheap 3ah cells from amazon and all of them were closer to 1.5. Cheap batteries can be a false

I am currently repackaging my nvna and would like to include a (much) bigger battery. What is the biggest battery capacity (Amp-Hours) I could use with the IP5303 charging circuit? Looks to me like

FW/funktion SreenCopy maxFreq 4/2traces CW-SWR NanoVNASaver, Vbat_state NanoVNA-Web-client, TAPR, NanoVNASharp comment -Q Y 1.5G 4 Y Y Y Y Y Y Ok on Android smartphone OTG -- *73, Lucio I0LYL Rome,

Rune, Just a note for any Fedora users out there. The right click to save an image does not work under Wayland. I had to switch back to standard gnome. I also had an issue with the fonts in the marker

Herb, I will certainly consider adding a screenshot feature :-) No promises when it will be in ;-) -- Rune / 5Q5R

Thank you for these words Herb, I have not to much improved SNASharp in last months because I was very busy. But I will get back to it :) David..

Here is a start https://www.keysight.com/upload/cmc_upload/All/ChallengesandsolutionsforImpedance.pdf https://electronics.etfbl.net/journal/Vol18No1/xPaper_05.pdf

David, I forgot to acknowledge the fine work you have done on the SNASharp application. I couldn't resist the D6 board at its price point and it probably would have joined a host of other boards in my

Hi Larry, Please refer to the forum Wiki. There are a number of application note and reference links there:??? /g/nanovna-users/wiki/External-links Refer to the Smith Chart