Your coax isn’t just carrying RF. Sometimes… it is the antenna. If changing feedline length changes your tuning, if touching your mic changes SWR, if your shack lights up with RF… That’s not “radio gremlins.” That’s common-mode current doing exactly what physics allows. Any antenna needs a return path. When you don’t design one, RF builds its own — through your coax, your gear, and your shack. You can ignore it. Or you can understand it. Your choice. #HamRadio #RFengineering #AmateurRadio #Commo