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3.5mm Ferrite Core Cord Ring Choke Bead RFI EMI Noise Suppressor Filter for Power Cord USB Cable Antenna Audio Cable Dropship - AliExpress
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Multiple windings on single ferrite ring vs multiple ferrite rings - Electrical Engineering Stack Exchange
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AC Power Cord Choke + Power Cord- 120VAC RFI Range: 1-30 MHz, -28 dB Noise Reduction, 15 Amp - Slip On Ferrite Beads - Palomar Engineers®
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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 Put a bunch of these ferrite beads on everything I plug into my truck and finally found electrical silence on 2m! : r/amateurradio](https://i.redd.it/ckdn3rtls5r51.jpg)