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Old 07-27-11, 10:44 AM   #1
HiCZoK4
 
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Default Ferrite bead

Ok so now I am getting confused here. I am working as an IT folk and ive got 4 clips ferrite beads from my administrator. Basicly Ive mentioned to him that I can hear my usb pendrive working when I also have my headphones plugged in front of my pc case and we've had a little discussion which ended up with him suggesting using ferrite on inside cables of my pc.

I understand and agree and all but once Ive started to look deeper into it Ive noticed that Ferrite is used mostly on some usb and vga cables. If that is so important to shield cables from esd, then why isnt it used on all cables like Hdmi cables, power cables, headphones, jacks and so on and so on.
Wouldnt it be wise to use it on anything ?

I heavent yet tried installing that ferrite in my pc(maybe later-now I am tired)

have You ever heard about that? What is You opinion on this crap?
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Old 07-27-11, 03:38 PM   #2
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Default Re: Ferrite bead

One more question. Would it reduce quality when clipped on headphones cable?
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Old 07-28-11, 10:15 AM   #3
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Default Re: Ferrite bead

Quote:
Originally Posted by HiCZoK4 View Post
Ok so now I am getting confused here. I am working as an IT folk and ive got 4 clips ferrite beads from my administrator. Basicly Ive mentioned to him that I can hear my usb pendrive working when I also have my headphones plugged in front of my pc case and we've had a little discussion which ended up with him suggesting using ferrite on inside cables of my pc.

I understand and agree and all but once Ive started to look deeper into it Ive noticed that Ferrite is used mostly on some usb and vga cables. If that is so important to shield cables from esd, then why isnt it used on all cables like Hdmi cables, power cables, headphones, jacks and so on and so on.
Wouldnt it be wise to use it on anything ?

I heavent yet tried installing that ferrite in my pc(maybe later-now I am tired)

have You ever heard about that? What is You opinion on this crap?
HDMI cables are immune to EMI, because of the way the signal is transfered (differential), so a ferrite core is useless for that application. You can use a ferrite clamp or beads on cheap cables (USB, internal PC audio cables, power cable, VGA). Good cable with an adequate shield does not require ferrite cores.
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Old 07-28-11, 10:18 AM   #4
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Default Re: Ferrite bead

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Originally Posted by HiCZoK4 View Post
One more question. Would it reduce quality when clipped on headphones cable?
Not at all, ferrite cores are entirely passive and dissipate high frequency electromagnetic emissions into low energy heat. Unless your headphone cable is really low quality, you will not hear any difference in the audio quality.
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