60 Pieces Clip-on Ferrite Ring Core RFI EMI Noise Suppressor Cable Clip for 3mm/ 5mm/ 7mm/ 9mm/ 13mm Diameter/Video Cable Power Cord (Black)

These ferrite cores seem to work just fine as basic HF chokes, and I feel they are a good deal at this price. I ran a test on my NanoVNA with 5 windings into the core to see which frequency range these ferrites can suppress, and they seem to do a good job between 3.5 MHz and 56 MHz. I hope this basic test on the NanoVNA helps others decide if these will help their situation.

I was having static issue on my Jeep's radio after installing some lower-cost headlights. Evidently, it's a thing. Regardless, I popped a couple of these on each of the power leads to the headlights and it has helped some. It decreased the static noise on most stations, but not all. I may need to add a couple more. Regardless, these are super easy to install once you figure out which size you need to use. They fit around cables well and with a variety of sizes on this pack, I should be able to use them in a variety of applications. They feel weighty in the hand, so I imagine they should be durable enough to withstand normal wear-and-tear. I know the real solution to my problem is to get better headlights. That's the ultimate goal/solution but for now, these ferrite rings get 5/5 Stars from me. Let me know if any questions!

They do the job eliminating and reducing rf noise in components and they snap in place easily and stay in place

Seam to work well. Used on a truck with a little noise in the radio.

I have used these on various cable sizes and they have eliminated RF problems. It's an excellent selection of sizes.

I wonder if?? Right!? Well I'm here to tell you yes these things really do work! I did my research and purchased the Tamicy brand 60 pieces assortment pack. But the bottom line is they do suppress unwanted noise and interference. I got them for my CB stuff and got them on all most everything. I'm talking- my CB -the coax the power amp and the power meter. I did that on my flat s reen tv -cable coax- wall a/c plug- plug in lites -if it has a cord it's got one on it..they are easy to use and good quality and good price.

various sizes worked well on various sized cables/wires blocking rfi need more large/medium ones less tiny ones

Hung multi band dipole in the attic. Transmitting caused weird stuff with appliances. Put these on various power cords and the antenna coax.

Poco que compartir son cables de muy buena calidad - es todo.-.-.-

Have used nearly all of these they are used to reduce the effect of radio frequency interference. Have not carried out definite testing to determine if within specifications. However they have worked in all all instances where required.

used on the AC power lines to LED lights

Satisfactory for reducing domestic stray RFI...adequate light usage. Sometimes an electical tape wrapping needed to keep a loose ferrite clip tight. Thank you.