Clip-on Noise Filter, VSKEY [10pcs 13mm] Anti-Interference High-Frequency Ferrite Core Choke Clip for Subwoofer,Amplifiers,Speakers,Video,Mixer,Home Power Audio Equipment (13.0mm Inner Diameter)

There’s no information on what mix or frequency bands these are designed for!

Was setting up an amateur radio and the remote power supply was shutting down due to RF getting in either the AC or 12V DC side. Strapped on on each line and tested. No more issues. I got the largest size to fit over the thick cables. Good low cost solution and easy fix.

It works as intended. But it breaks very easily, so be gentle.

I use theses to reduce RFI from my ham radio. They keep the 'little voice' out of my son's computer now!

I BOUGHT 50 OF THESE AND PUT THEM ON THE COAX CABLE THAT FEEDS MY 80 METER 4 SQUARE ANTENNA.MY NEIGHBOR HAS A PLASMA TV THAT USED TO CREATE BIRDIES EVERYWHERE ON 80 METERS.PROBLEM SOLVED