Ferrite Ring Core Black RFI EMI Noise Suppressor Cable Clip-20Pcs

Works great for noise cancellation

These little guys are great to have to prevent RF nosie when placed correctly. Should you ever have any sort of interference just place one of these onto the input and it helps reduce or even stop interference.Many sizes which makes it so much easier to use on almost anything!!

I bought these to try and fix a CB radio that had intermittent poping noises coming from the speaker. I put them on both the power wire and the antenna wire, but it did not fix the issue. It could be a problem inside the CB unit itself, so I'm not saying that these do not work, they just didn't work for me. They do seem like a high quality product and the various size options are nice to have.

Had some electrical interference coming form my truck speakers after installing LED lights. Used these on the LED positive circuit on both lights. Noise virtually gone.

I've got a new amateur radio set up in my house and it was picking up all kinds of static. I put one of these suppressors on the power cable, and another one on the coax from the outdoor antenna (just in case!) -- the static is almost totally gone. These made a huge difference for my setup, so I'm pleased.

I bought a package of these because I was having EMI interference from a AC Infinity product I bought, to cool my vintage receiver. These are difficult to open, and you need a small screw driver, to pry them open. The tech at AC Infinity suggested using one of these, but it did nothing. I also used one on a different receiver preamp I have in my shop, which was picking up noise from my LED lights, but, it didn't work with that one, either. I think these are " snake oil". I wouldn't recommend this product at all.

I am having RFI issues in my car, a fiberglass bodied Avanti, after adding LED tail lights. I improved the grounding of the lights with no improvement, then added one, then two, then a whole bunch of these chokes to the antenna lead, then the brake light wiring (why not?) even tried radio power, speaker leads, etc., again, might as well try. It made no difference.Obviously the LED bulbs are creating the issue as it stopped when I went back to conventional bulbs, but I expected these chokes to help, but they didn't.

I've been trying to get a better signal on a few of the channels I get with my TV antenna. Any signal improvement can help the quality, pixelating and the number of stations received. So I saw how chokes can remove certain kinds of interfering signals, and tried these. In the morning, I ran a channel scan, and got 59 stations. I put a ferrite choke on the coax, right before the amplifier (did not want to amplify interference), and a second scan a minute later gave me 65 channels.I've found a cable splitter, and a lightning arrestor/5g filter both dropped 90% of my channels. I can't use them. Only the strongest signals made it through. I saw the antenna expert show how the longer your coax is, the bigger the signal drop. And even just coiling excess coax will also result in a signal drop. I know now, that even a small drop in signal can be the difference between getting 60 stations and 12. Next step is RG6 quad coax, and it being just long enough to reach. I have a 70 mile omni directional antenna, and an 80 mile directional with vhf to reach a specific far away station. Very happy cutting the cord, and happy with these chokes. By the way, with a good antenna signal, the picture is much better than a cable signal. Cable compresses their signal. and when you get it, its only a fraction of what the signal was originally.