After a fair amount of time using the 2643251002-based common mode choke (CMC) (current balun?), I got curious about how much attenuation it presents to common mode currents. I cobbled together a test jig, and connected it to my nanoVNA. The 2643251002-based common mode choke (CMC), with 3D printed spider, hot melt adhesive, and self-amalgamating tape.
A Ham Radio Blog by ZL1HAZ