Good video. I knew that stuff already but sometimes I like to relax while watching things I know explained in someone else's way. Who has a similar habit? :) Thanks for the video. Cheers!
I found it on my bluetooth receiver amp system. While the ground loop is existed, i hear radio signal out from the speakers. Thanks, I've known that bulky things on my cable is used for what now.
Why are those ferrite chokes mostly found on older cables? With the modern, higher frequencies, I would expect them to be more significant instead. Especially high bandwidth digital stuff like USB 3.1 generates a ton of noise.
I suspect it's a combination of cost savings, higher frequencies (at which the ideal antenna length becomes much shorter than, say, a USB cable, and thus the cable doesn't act so much like an antenna that picks up the noise), and better overall design.
@@ScottiesTech Well, the costs savings make sense. But when it comes to, for example USB noise, I was mostly referring to emission of the noise. Especially the ~2.4GHz bands, like WiFi and Bluetooth communication is are known to be susceptible to the USB 3.0 noise. Even with good shielding the noise still gets radiated, because of the capacitive coupling between the shield and datalines. But TBH, I don't know how well ferrite chokes work to prevent RF emission, since most sources only mention the filtering of incoming noise.
@@QoraxAudio As far as I know, ferrites don't really do a very good job of preventing radiated noise at high frequencies. But then, I'm no EMI specialist by any stretch. That's an entire science in and of itself!
This is weird , my audio interface had ferrite and it was picking up signals from mouse and keyboard ,but as soon as i changed the cable of audio interface , the noise was gone...im so totally confused now lol
All cables used to have this but they started to cheap out. For those who don't fully understand physics, the energy transmitted actually travels outside the wire. This fact usually blows people's minds.
I just bought a variety pack of the ferrite clips, I’m really hoping it’ll stop adding noise to my focusrite Scarlett 2i2 audio interface. I’m going to clamp every single thing I can think of. Wish me luck!
@@AZNFLACO unfortunately, not really. By now, I’ve determined the issue to be RF noise coming from my computer, but don’t know how to eliminate it (dirty air)
I had a real problem with interference on the audio out from my PC to my speakers. I'll admit, it took a while for me to wake up and snap a ferrite over the cable but the affect was magic, all interference gone!
Enjoyed your video. Would you happen to know how I can reduce the interference from tv cable and electrical cable running side by side? Whoever installed the TV cable at my home installed it next to the electrical cables/wires. I'm always getting TV screen freeze or my sound fades on my TV.
If the TV cable is coax, it should be relatively immune to interference from power lines. I would check all connections first, and then perhaps any amplifiers on the line.
Is it really necessary to have these if I use such s cable just for charging my redmi smartphone and datacable? I'm asking this because my sony cable has broken at the base of this bead and thus I need to remove this bead to make my cable working again and wind back the cut wires...please do respond at the earliest
Yup, that's common on things like DC power bricks for gizmos... because the switching power supply can produce 'high-frequency' noise, OR more likely because the power cable (for things like PC speakers) can act as an antenna and pick up noise from the puter, which then gets passed into the speakers and amplified.
@@ScottiesTech My laptop charger went bust thanks to a surge and I had an old charger with a broken tip lying around, so I tried a very crude work around of attaching one cable with another without cutting off the Ferrite bead. So from what you say, I'm guessing there shouldn't be a problem?
It might be length, or it might be that they don't have the data lines connected internally and were only intended for use as power cables. Or something I didn't think of!
Can ferrite cores be moved to a more convenient location on a cable and still be effective, as in...ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5TAoZ4_rk1I.html ?
Your clip is not useless for me, it just confirmed that the AC spindle on my CNC router was f-ing the data signal passing thru the USB cable and messing the movement of the stepper motors! Thanks for your vid, i subscribed for sure, cheers from Transylvania, Romania, Europe! :)
I had a printer which would stop and fails if in the middle of printing someone turns on a car, microwave oven, or even lamps nearby. I solved it completely by using an USB cable with ferrite core in both sides. The one which came with the printer hasn't it.
I've always wondered what this part was on a cable, but never knew it's name, this is the only video that's clear to me than other videos I've seen, interesting video
Hey Scottie, thanks for the video. I appreciate you taking the time to make it. A few of my dashcamtalk.com forum members and myself are having a problem with high-pitched noise coming from our Viofo A129 dashcams, but only when they are connected to the car's fusebox using a Viofo 3-wire hardwire kit. I was hoping you may be able to help. Here is the dashcam we're all using: www.amazon.com/gp/product/B07DL8MS1T/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and here is the hardwire kit, that seems to be the root of the problem: www.amazon.com/gp/product/B07K83R5W1/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 And finally, here is the forum where this is being discussed: dashcamtalk.com/forum/threads/a129-duo-high-pitched-noise.38653/ I know I'm asking a lot, but if you have some time any advice you could give us would be very much appreciated. Thanks!
Well, lessee... According to the various posts on the forum, the whine seems to come and go and it's hard to narrow it down to the hardwire kit or the camera itself. It's powered by a USB plug, and it looks like the 3-wire cable already has a big honkin' ferrite core on the cable. One thing to try is if you have a USB battery bank (like for recharging smartphones) that was a 2.1A output, try powering the cam from that battery bank with a USB cable. That should be a relatively clean +5V supply over the USB cable. If that makes the whine disappear, then it's essentially a problem with the 3-wire kit. In that case, you could try adding another ferrite to the cable (loop the cable through a bigger ferrite twice if you can), but that seems like a stretch since there's already one present. I would actually lean more towards some issue with the cam itself. The cam seems to have both WiFi and GPS, both of which could cause noise. And if it's a prob with the design of the cam, that could also explain why something seemingly goofy like changing the SD card could change the whine. That might slightly change power requirements or something, thereby modifying or stopping the whine. But in the end, if powering with a clean 5V supply (like from a Li-ion battery bank) doesn't work, and another ferrite doesn't work to block noise introduced by the 3-wire cable kit, then I'd lean towards inadequate EMI shielding/isolation inside the unit itself.
Maybe, depending on the ferrite used... Most of those available to snap over cables start around 150-300kHz and suppress up into the multi-MHz range... But their frequency response is pretty much a bell curve, so you would get only a little bit of attenuation at 59 kHz... AFAIK, anyway!
It would have an effect, but for 50/60 Hz AC, the impedance is so low that there is not much happening in the ferrite. Usually ferrite cores for filtering have theyr impedance specified at 100 MHz, as that is around the frequency where they present the highest impedance. And if you put both the neutral and phase wire thru the same core, you have a differential mode current flowing to your load and back, and not a common mode current. So it really depends on what you would want to filter out on that electric cable...
@@randgrithr7387 many thanks for the reply............so do i need to put the ferrite a certain distance from the SSD since the ferrite's magnetic properties might harm the SSD ?
I have a drill charger that causes noise on an FM radio. I put one of these on the power cord of the charger on the charger end. It cut down on the noise but not all the way, Should I put another on the plug end?
Hello i want to ask some question. I have speaker for my computer, but i can hear radio sound clearly. Where do you think its the best to put ferrit on? Speaker power cable/ speaker jack 3.5 audio cable to my monitor or else? Im completely green, hope you can enlighten me. Thank You
Question: My PC is an RF hot box and anything within 6 inches becomes hot as well. Take for instance my microphone next to the pc it picks up hum and get it over six inches it goes away. I noticed on the VST (EQ) I was using that when I hooked up a DBX286s the frequencies were all over the place but the peaks were 60/120/180/etc... so 60hz mains hum with a lot of harmonics. What do I do for that?
Alas, no. Ferrite blocks high frequency noise, not low-frequency. If there's a lot of 60Hz + harmonics, you may want to check your ground as well as any and all power supplies (puter, power bricks, etc). One bad supply can create lots of problems like that.
Scotties, please can you help me ! Rfi Emi ferrite ring suppressor with clip can i use it on my smart tv? I have a problem. when I turn on the switch on my closet (which has light savings) My smart tv blinks. thank you.
There is ferrite inside of some circuit boards. Some ferrite is coated. But what is coated onto the ferrite? I recently broke a core like this, but I saw dust come up from the break. I want to know is this stuff is poisonous.
So I have an 75 watt Led light on an airplane and it creates noise on my aviation radio, any way of getting rid of this noise/ the Aviation radio is 122.976 MHZ.
Hmm, that can be tricky. You seem to have figured out that when the LED light is on, the driver circuit for the LED is generating noise. Most likely, that noise is audio-frequency, and that's being coupled somehow to the radio. It could be a loose ground connection for the light, or coupling between two wires in a harness somewhere. You might try an 'audio noise filter' on the power leads for the radio (which is not just a ferrite core, but usually a capacitor and sometimes another component or two).
Always chill informative videos. Question, has ferrite been used to protect from other types of frequencies, like a Faraday box in a way? I'm not smart.
Testing rooms for radio emission and immunity are usually completely covered on the inside with ferrite tiles, to keep the outside radio signals away from your measuring devices, or to keep the generated fields in the test room inside. On top of the ferrite tiles there are normally some more absorbant cones inside the room to eliminate most of the reflections of radiowaves from the walls and ceiling.
Not much. It depends on the type of ferrite itself and the frequency of the 5G system. 5G can be low frequency (i.e. 600 Mhz) all the way up to tens of GHz (millimeter wave). Ferrite is usually used to block 'high-frequency' noise that is much lower than, say, millimeter wave 5G.
