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Product name: Ferrite Cores Ring Clip-On RFI EMI Noise Suppression Filter Cable Clip
Color:Grey
Size :
0.14 inch/ 3.5 mm (inner diameter): about 0.98 x 0.51 inch/ 25 mm x 13 mm (outer size)
0.20 inch/ 5 mm: about 0.98 x 0.51 inch/ 25 mm x 13 mm
0.28 inch/ 7 mm: about 1.18 x 0.63 inch/ 30 mm x 16 mm
0.35 inch/ 9 mm: about 1.38 x 0.75 inch/ 35 mm x 19 mm
0.51 inch/ 13 mm: about 1.42 x 0.94 inch/ 36 mm x 24 mm
Specification:
3.5MM inner diameter: suitable for 3.5-4.5mm cables;
5MM inner diameter: suitable for 5.0-6.5mm cables;
7MM inner diameter: suitable for 7.0-8.5mm cables;
9MM inner diameter: suitable for 9mm cables;
13MM inner diameter: suitable for 10.5-12.5mm cables;
Packing included:
15 Pcs-7mm inner diameter
Nephilim777
Reviewed in Germany on March 10, 2025
Sie erhalten 15 Clips mit 13mm Loch... und nicht wie in der Beschreibung steht "Passend für Kabel mit ca. 3,5 mm, 5 mm, 7 mm, 9 mm und 13 mm Innendurchmesser"...Für andere Durchmesser kauft man die kleinern Clips...Die gelieferten sind nur für 13mm Kabel gedacht, ansonsten bleiben der Clip nicht an Ort und Stelle.Somit für mich nicht nutzbar.Weiter unten in der Beschreibung steht dann "Lieferumfang: 15 Stück, 13 mm Innendurchmesser. " - DankeDas ist allerdings sehr irreführend und sollte dringend überarbeitet werden.
Dr. KS
Reviewed in Germany on April 7, 2025
Ich verwende die Ferritkerne zur Drosselung von Funkstörungen auf Kurzwelle. Man kann damit tatsächlich Funkstörungen vermeiden, die durch Schaltnetzteile, Computer und andere digitale Geräte verursacht werden. Bei meinem SDR-Empfänger helfen sie Störungen abzublocken, die über das USB-Kabel vom Computer kommen. Bei Interesse einfach mal bei electronics unmessed reinschauen. Ein Tipp: Die Ferritkerne wirken besonders effektiv wenn man mehrere Ferritkerne verwendet oder wenn man zwei bis drei Windungen eines Verbindungskabels durchschleift.
billwhip
Reviewed in the United States on September 7, 2024
easy to install and work as advertised!
Chris
Reviewed in the United States on September 25, 2024
Good ol' little ferrite chokes, seems to function as they should.Handy to have a few around for those audio and/or radio setups
The13thMan
Reviewed in the United Kingdom on September 15, 2024
These ring cores come plainly bagged, with 15 included. Each is identical, with two clips on the side that are easy to flip open, build quality seems OK. I have a spaghetti junction of cables so like to use ferrite cores where I suspect there may be interference, these are just the right size for my larger cables so I am very happy with them
Customer Review
Reviewed in the United Kingdom on August 30, 2024
These are really simple devices so they get a simple review. Essentially you open them and clip them around cables to clean up analogue signals. As the title says these are required less frequently with mostly digital signals, but they still have uses for audio equipment which can still be prone to interference.I have some surround sound speaker in my garage workshop that is prone to interference which already had one of these attached. I removed it and sure enough there's a little hum in the background again, so I attached one of these filters and the hum once again has gone, so I'd say they work from my very limited testing.They feel as well made as others I've used over the years.
Barkyhill
Reviewed in the United States on July 20, 2024
These are simple filters for reducing some noise on wall-wart style power supplies and such. Often they will work best if you can wrap the wire through 2 times or more - IF you have small enough wire.They will fit on most USB, Mic cables and on RG-6, RG-58 & RG8x coax cable. Depending upon your noise problem, you may easily need several of these clipped on.This is a "your mileage may vary" situation, unless you know specifically the frequency of your interference and the target frequency of these ferrites. Unfortunately, the vendor does not provide much info on the target frequency range, but these will probably work best on the afore mentioned wall-warts.
Cataptra
Reviewed in the United States on July 2, 2024
Dislikes: noneThese worked perfectly for what I needed them for, to put on an AC power feed wire inside a control system I designed for everyday and Holiday use. System is comprised of an MP3 Controller, a Kinter Amp and an FM Transmitter.The Amp and FM Transmitter are powered by their own 12VDC/5Amp power brick.The power bricks had a ferrite coil on their output side, but none on the input side.I used 4 of these ferrite coils, 2 on each input side of the power brick[120VAC side], and one brick I had to add one on the output side[12VDC] going to the ampliflier.I had to cut the power output[12VDC] side short for my use, directly soldered to the Amp power pads on its printed circuit board, and cutting the original barrel connector off, also required cutting the permanently sealed ferrite coil off, as it was very close to the barrel 12VDC output female connector.So I added 1 of these about 8-10 inches back from the Amp.Before I installed 4 of these ferrite coils, I was getting bad hum and feedback when I opened the control center box to my outdoor speakers[connected to Amp].However, after placement on the cords I needed them on, now I can open the box without fear of loud hums and feedback from their power supplies, or the main AC power cord that supplies power to both power bricks.Well worth the cost, I only used 4, but you get a total of 15 grey ferrite coils. So I have a few for future projects, and I do have a few in the works where these will come in handy.Yes, I recommend these. They work very well, and do the job they were designed for.
Customer
Reviewed in the United States on July 17, 2024
Needed to use these ferrite cores/rings for a USB plug from a radio to my PC, and it worked just fine. You might have to put a few of these on, but it does seem to help. I could also find these being useful for any buzzing from a dirty power supply to speakers but I hadn't tried these on that yet. However I've used ferrite cores before, just needed more and it did the job for that use case as well.
EricP
Reviewed in the United States on June 28, 2024
There is a ton of discussion online about whether these can be effectively used to quiet noisy power supplies on common guitar pedal boards. I wasn't really able to find any actual musicians who attempted to use these and succeeded or failed. The computer nerd set online seems to think there can be no effect on sound, but I don't really think they have wrapped their minds around how noise is created in a pedal board.My understanding is that using these on audio cables has just about zero effect. If you have janky jumper cables, you are going to have to deal with that separately. The thing is: noise mostly doesn't come from janky audio cables - it comes from interference in the A/C power.Long story short: They were super effective for my situation. I have a large board full of cheap clone pedals. I use cheap power supplies daisy-chained to the limit. This naturally creates a wall of white noise, especially when high-gain pedals are clicked on.I applied these cores to the main power cable coming from the wall socket and to the daisy-chained A/C cables going to my gain pedals and my compression pedal. There is now silence where there was white noise. The signal sounds great. I don't believe there is really any possibility of denigrating the signal as you are not messing with the audio cables, just cleaning up the juice. I gotta believe this has less audible effect on the signal than a common noise gate pedal.Tips:1) The internet says apply them close to the power supply. I only did this with the main power but it seems to be working perfectly.2) Wrap the cord a couple times or their will be zero change, allegedly.3) I used the 9mm janks for everything even though I ordered a bunch of sizes. I wrapped the bigger cable 2 times and barely got it closed. I wrapped the little guys three times and it was tighter than a duck's butt. So - 9mm was perfect for me. 7mm would have been too small. I wouldn't even be able to guess what you would need smaller than 9mm for.4) I was tempted to apply these to the PA amp, but the internet says application to too much current will cause overheating and other problems. I don't really understand any science/electrical stuff so I would say do your research before using these on anything that might draw a decent current. Amps especially spike current draw, so I assume it's a no go.I am going to recommend these to everyone. Super happy with the performance.
Michael B
Reviewed in the United States on June 23, 2024
Mechanically these attach as expected. They snap on and off (with the help of a small flat head screw driver) fairly easily. I did my best do do some RF testing using a Nano VNA but I don't think my set up was sophisticated enough. The best I could tell is that these reduced frequency interference from 10MHz to 250MHz reasonably but not so much after that.For general use - it appears that you might need 2-3 of these ferrites to get the impact you are looking for. That's not unusual - Fair Rites are similar. When I tried to do a back-to-back comparison, it appeared that the Fair Rites were better.Bottom line - these will likely work for general use - but if you are really trying to reduce EMI you should consider putting several on your lines - not just one.What would make this a better value, is for the manufacturer to give some specs on the ferrite material being used.
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