Pack of 10 Snap on Ferrite Core Bead Choke Ring Cord RFI EMI Noise Suppressor Filter for USB/Audio/Video Cable Power Cord Black (Black)

Well, i bought this trying to reduce the signal noise in my car FM radio. This noise was created by a LED lights recently installed (some Xenon lights does too) because i only hear the noise interference when the lights are on. I attached some of this cores in the radio signal antenna cable, and on the thin ground cable connected to the antenna. The noise was eliminated. The results of this procedure depends of the noise levels so i suggest you to place the cores correctly and in the quantity you need. Hope it helps.

I'm an audio person, and I put these on all my USB cables that connect through my computer. They are cheap and easy to install. They might not be doing anything for me at the moment, but my audio is quiet as a mouse :)

I have a lot of old analog stereo gear and also play guitar through old tube amps. All those old pieces of equipment weren't designed in an era of WiFI and switching-power supplies so they aren't designed to be immune from those interferences. I've found that using these chokes on my audio cables, or the audio power cables, or the suspect interferer devices, can reduce or eliminate high-frequency whistles or statics that are ever-present in our modern homes.Note that these chokes do NOT eliminate low frequency Hum or Buzz noise. Those noises are usually from ground loops in your system or electro-magnetic interference from large iron/copper power transformers. These chokes are best for eliminating high-frequency whistles and WiFi/Cellular static noise in your gear.

Trying to get rid of an RF noise in my FM audio setup. These chocks seem well put together and where easy to install on my ceiling mounted LED light fixtures. I had enough to put two chocks on each lamp's power cord, but there was no noticeable reduction in the noise being emitted from my speakers. The chocks were placed as close to the lamp fixture housing as possible. I also placed three of the chocks on the power cord of the FM radio receiver as another possible filter point. I'll have to find another solution to my problem!

As Advertised

They are well made and stay on the cable well. I’d say these are really made for USB cables. It does fit on 12AWG wire as well as RG-58. I’m using this for my HAM Radio APRS digipeater setup.

Good for the price

I have used a ton of these to cure stray RF in the Ham Radio room...also in my car. They are GREAT!