Home audio & video forum: Ferrite cores - to use, or not to use?

by: Park_Bio November 18, 2012 6:18 PM PST

Like this

0 people like this thread

Staff pick

Resolved question

Ferrite cores - to use, or not to use?

by Park_Bio - 11/18/12 6:18 PM

My new Samsung plasma television (PN43E450) came with three ferrite cores (Todaisu HT2629S), a.k.a. ferrite "rings" or "collars". Instructions say I should install one on each end of power cord, providing a maximum distance from the plug (at each end) for core installed. But it doesn't say why I should install them, or if they sometimes might not be needed at all.
A third ferrite core is provided for the antenna cable. Well, I don't have an "antenna," my t.v. signal arrives via AT&T's Uverse (a telephone line?). Should I treat that the same as an antenna? If the cores are always needed, why does Samsung leave it up to the consumers to install them, or not, and leave placement up to us as well? The arrangement seems to imply they are either optional or sometimes unnecessary.
I searched CNET forums and found several old posts but, in each case, found no real help. Maybe I misread the tone, but in one case, a reply (by R. Proffitt) seems to come from a someone who knew the answer but felt a snarky response was all that "patshak" was due. Again, sorry if I misread the tone, but if all you intend to say is "figure it out yourself" (exact words were: "Think about or research what this part does."), then why reply at all?
A follow-up by "patshak" politely ignores the attitude, and points out that using two or more of these sometimes bulky ferrite cores, let's say on adjacent lines at a power strip or outlet, can cause crowding. Okay... but this only distracts from the original query... "how does a consumer know if ferrite cores are needed?" Are there situations when using them may do more harm than good (as Proffitt implies in another answer).
Perhaps ferrite cores are analogous to vitamin pills... "vitamins" are good (just like suppressing RFI)... but it they are not "one size fits all." Some of us get too much calcium, or iron, for example. I'll bet using ferrite cores, like taking vitamins, can have unintended consequences. If not, why aren't ferrite rings standard on every television power cord?
Still, I cannot find any guidance for consumers on how to determine whether or not to use one or more ferrite cores. Samsung only tells consumers where, not if, the provided cores should be installed, I found no guidance on what the do or how to know if they are optional or always helpful, or only used to address a problem after it has been detected.
Does Samsung provide these ferrite cores as an afterthought, maybe instead of providing a better quality (shielded) power cord? In one CNET forum thread (on ferrite cores), Proffitt writes that ferrite cores protect your "signal" from the effects of a power cord spewing radio frequency interference, but doesn't say how to determine if that is actually happening, or whether ferrite cores will help or hurt in any particular situation. Another of Proffitt's replies (to "patshak") seemed to suggest using ferrite cores on an antenna cable could harm your signal quality.
If I use the three ferrite cores supplied by Samsung with my plasma television (to suppress RFI?), could they also improve or degrade the quality or quantity of power, or the signal quality delivered by any input line to my television?
As an "electronics technician," I make a pretty good biologist (I am out of my field here). I suspect I am not the only one who would appreciate it if some helpful techie would explain the what, why, when and when not, and why not of using ferrite cores. Simply providing a link to a site that explains this would be fine. Won't someone who aced electrical engineering 101 give us non-techies a little guidance?

Park_Bio has chosen the best answer to his/her question.
Click here to view the answer that was selected.

Forum Icon Legend

  • UnreadUnread
  • ReadRead
  • Locked threadLocked thread
  •   
  •   
  •   
  •   
  •   
  •   
  •   
  • ModeratorModerator
  • CNET StaffCNET Staff
  • Samsung StaffSamsung Staff
  • Norton Authorized Support TeamNorton Authorized Support Team
  • AVG StaffAVG Staff
  • avast! Staffavast! Staff
  • Webroot Support TeamWebroot Support Team
  • Acer Customer Experience TeamAcer Customer Experience Team
  • Windows Outreach TeamWindows Outreach Team
  • DISH staffDISH staff
  • Dell StaffDell Staff
  • Intel StaffIntel Staff
  • QuestionQuestion
  • Resolved questionResolved question
  • General discussionGeneral discussion
  • TipTip
  • Alert or warningAlert or warning
  • PraisePraise
  • RantRant

You are e-mailing the following post: Post Subject

Your e-mail address is used only to let the recipient know who sent the e-mail and in case of transmission error. Neither your address nor the recipient's address will be used for any other purpose.

Sorry, there was a problem emailing this post. Please try again.

Submit Email Cancel

Thank you. Sent email to

Close

Thank you. Sent email to

Close

You are reporting the following post: Post Subject

If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.

Offensive: Sexually explicit or offensive language

Spam: Advertisements or commercial links

Disruptive posting: Flaming or offending other users

Illegal activities: Promote cracked software, or other illegal content

Sorry, there was a problem submitting your post. Please try again.

Submit Report Cancel

Your message has been submitted and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.

Close

Your message has been submitted and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.

Close

You are posting a reply to: Post Subject

The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to the CNET Forums policies for details. All submitted content is subject to CBS Interactive Site Terms of Use.

You are currently tracking this discussion. Click here to manage your tracked discussions.

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

Sorry, there was a problem submitting your post. Please try again.

Sorry, there was a problem generating the preview. Please try again.

Duplicate posts are not allowed in the forums. Please edit your post and submit again.

Submit Reply Preview Cancel

Thank you, , your post has been submitted and will appear on our site shortly.

Close

You are requesting a clarification of the question: Post Subject

The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to the CNET Forums policies for details. All submitted content is subject to CBS Interactive Site Terms of Use.

You are currently tracking this discussion. Click here to manage your tracked discussions.

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

Sorry, there was a problem submitting your post. Please try again.

Sorry, there was a problem generating the preview. Please try again.

Submit Clarification Request Preview Cancel

Thank you, , your post has been submitted and will appear on our site shortly.

Close

You are posting an answer to the question: Post Subject

The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to the CNET Forums policies for details. All submitted content is subject to CBS Interactive Site Terms of Use.

You are currently tracking this discussion. Click here to manage your tracked discussions.

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

Sorry, there was a problem submitting your post. Please try again.

Sorry, there was a problem generating the preview. Please try again.

Submit Answer Preview Cancel

Thank you, , your post has been submitted and will appear on our site shortly.

Close
close

Click here to be notified via e-mail when someone submits an answer.

Would you like to resolve this question? close

Based on your response, it looks like this question has been answered.



Sorry, there was a problem resolving this question. Please try again.

Resolve Leave unresolved