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When you choose a set of frequency limits, and a set of frequencies in that span (number of frequency steps), then only and exactly that set of frequencies is calibrated. If you then make a

Roger, Note that I am only clever enough to post a link to the calculator. The Aussie, Jose Miguel Vaca, VK3CPU is the one who did all the magic so I don't need to use the CF scale on my slip stick.

Cliff, That is a very impressive calculator!. A suggestion - You only calculate L with the initial permeability. You already plot X so it would be nice if you could add L to the graph since it varies

Please read ANY of the user guides and learn what the letters on the left side of the display mean. On Sun., 17 Oct. 2021 at 10:18 a.m., Joe WB9SBD<nss@...> wrote: Now when you save a calibration

YES.

Hello Andy, I just installed the drivers from the ST site on a Win10 computer using the "Absolute Beginner's Guide to NanoVNA" yesterday in hopes of connecting to a NanoVNA-H4. The guide is very

Now when you save a calibration to a memory. Is that good still after a power down and then fired up again some other day? Joe

I had wondered about this. I will calibrate over several different ranges (e.g. 143 to 147 MHz, 431 to 433 MHz, etc.) and save each one. I am assuming the calibration is saved each time one of the

Hi Joe, YES. However if you desire to improve accuracy, then do the calibration again over the smaller freq span. For your work, you might consider calibration over each of the ham bands and store

Yes, for the most part.? Let's say you have the original NanoVNA which uses 101 points. Your original cal is 101 points over the 27 MHz between 3 and 30, so about 270 kHz/point.? If you "zoom in" to

When you do a calibration open/short/50, Stimulus from 3 to 30 Mhz. it should then be accurate between 3 and 30 Mhz correct? OK you calibrated with the 3 to 30 Mhz scan width. Now if you change the

Excellent explanation Gregg - thanks! I also stepped into the same trap

Read Absolute Beginner's Guide to NanoVNA /g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf 73 Martin 9A2JK

From Jose Miguel Vaca, VK3CPU. In beta testing. Designed to help make toroids more accessible to designer/builders. Currently supports designing inductors, but will add support for suppressors soon.

Hello to the group, I have tried this before but ran into such a brick wall that I had to walk away from it. That said some time has passed and I am trying this again. I have a semi newer H4 Version

I wouldn't normally design a 100 ohm system using 50 ohm transmission lines and innerconnects and then compound it with stubs but I was going off your original comment of works meaning no loss of

I don't see any reason why you'd need 100 ohm cables. You'd replace the bridge (CH0) and pad (CH1) components to make it 100 ohms, the short cable to the T would make some difference, but at 900 MHz

Most software implementations expect arguments to trig functions in radians while most calculators expect degrees.? If you use GNU Octave, there are now functions for either.? sin(theta) expects

In my original post, I had not considered using different stub lengths. That's a good twist. 100 ohm cable and connectors may pose a problem. It seems like the definition of works has changed to

rho = 10^(mag S11/10) gamma = rho * cos(phase) + j * rho * sin(phase) Z = Z0 * (1+gamma)/(1-gamma) if you are doing it in Excel rho = 10^(S11/10)