Amazon.com: IEUYO Clip-on Ferrite Ring Cores EMI RFI Signal Noise Filter Noise Suppressor for HDMI USB POWER Cable Diameter 3mm/5mm/7mm/9mm/13mm,5Size,26PCS : Electronics
Put a bunch of these ferrite beads on everything I plug into my truck and finally found electrical silence on 2m! : r/amateurradio