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To start off, the common mode choke (CMC) I'm addressing is also referred to as a transmission line transformer. Physically it consists of a single bifilar set of windings on an appropriate ferrite

Please include Q=1 contour as it is ROYAL! That will allow resonator Q to be determined. As well, some other Q definitions.

How about a pipe? The sender doesn't even have to be aware of the pipe's existence. WIKIPEDIA - Named Pipe (Software) https://en.wikipedia.org/wiki/Named_pipe 73 de Andrew/N5ASE [email protected]>

I plot SWR circles of 1.5, 2, and 3. Maybe I'll just plot Q contours aligned with those. Thanks for the help, Alan. Brian

I'm not going to write another NanoVNA-Saver or NanoVNA-App. Someone can incorporate the features they like into those programs if they wish. Brian

Thanks Brian Hope it will be a real time plotter one day soon , it's a dream. 73's Nizar

Alan, if I were to display several Q contours simultaneously, what values would be most useful? This would require no user input. Q of 1, 2, 3... These Q contours roughly align with SWR circles of

No. It runs from .s1p or .s2p files only. See splot.txt for details. Brian

Hi Brian Thank you , and great work , i am still not familiar to , it seems great and can be developped more , if any youtube video can help us step by step how to use it , it will be very helpfull .

Alan, if I were to display several Q contours simultaneously, what values would be most useful? This would require no user input. Brian

Routine I did inputs a single Q contour value. The Q=1 is a default value. No input required. This value of unity at one time was used and provided with vna instruments as an overlay or etched into

Nizar, this program will do that: https://k6sti.neocities.org/splot.htm Brian

Hi Jhon A graphical X4 zoom option on the future firmware around the center of the Smith shart can help to show more easily the impedance focusing on the center plot of Smith diagram . 73's Nizar

Hi Jhon In fact I redo the measurement of the characteristic impedance of the first balun with more care of bad contactes, i measure Zc=60 Ohm see screenshoot below , wich gives SWR = 1.2 with 50 Ohm

Jim, I had the same thoughts myself, and earlier today I decided not to pursue graphical matching any further. My first impulse for a design problem of any complexity is to implement an optimizer. I

At some point, too, it's addressing a pretty niche need (essentially lumped component multisection filters). I would think that most people today designing a multi section filter use some sort of tool

Don, this sound like high values for the constant-Q curves would be necessary. Is that right? I'm trying to avoid keyboard input, such as specifying Q for one of these curves. So far the only keyboard

When making a graphical multi-section matching network solution, the constant-Q curves guide your component choices, to avoid unnecessarily constraining the bandwidth. The idea is to have each

A phase vs frequency plot helps identify where the middle of the transition is. Sometimes that's easier than trying to find the -3dB points. A classic S curve from +90 to -90 degrees phase, and 0 is

Thanks for all the details, Alan. My program does have group delay, which is differential phase shift. It does extract Q from S11 or S21 when measuring inductance. I've changed to displaying SWR