[TowerTalk] Common-Mode Current Analyzer

Brian Beezley k6sti at att.net
Mon Apr 21 09:16:24 EDT 2025


I've written a program to analyze common-mode current in an antenna 
system. I think the required measurements for an antenna on a tower or 
mast will be too much trouble for nearly everyone. But they should not 
be difficult for an antenna with a feedpoint near ground, such as an 
end-fed halfwave or a vertical.

I'm hoping the program may provide insight for intractable common-mode 
problems, but that may be expecting too much.

https://k6sti.neocities.org/cm.htm

I just whipped this up in the last day. Check the date at the end of the 
writeup. If it changes, there's a new version available.

Use my s-parameter plotter to view program results:

https://k6sti.neocities.org/splot.htm

Brian



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