New HDTV; manual says to use ferrite cores

Archived from groups: alt.tv.tech.hdtv (More info?)

"Dennis G. Rears" wrote:
>
> I just got a new Panasonic plasma HDTV. it came with ferrite cores. The
> manual says to use them with the incoming cable, PC video cable, and other
> devices. What is thier purpose?
>
> dennis

Funny you ask about ferrite cores (hollow cylinders)...

I saw these strange devices in MIlwaukee on a portable Lionel

Train layout built by a Chicago RR Club... Each module had 1

or 2 cores slid over the 20v track Power feed 14 gage cables under

the table.... I was told that these cores minimize burn out

of delicate electrical RR components in case of a surge

or short circuit...??? I've got to ask more RR

Clubs if they do work......

Archived from groups: alt.tv.tech.hdtv (More info?)

In article <DTo5d.18487$6X1.14381507@news4.srv.hcvlny.cv.net>,
drears@runningpagespam.org says...
> I just got a new Panasonic plasma HDTV. it came with ferrite cores. The
> manual says to use them with the incoming cable, PC video cable, and other
> devices. What is thier purpose?

The ferrite cores reduce both interference pickup and interference
radiation by/from your display by making it harder for those currents
to flow in the shield layer of the cables. Their use may reduce the
pickup of interference from nearby transmitters and other RF
radiators. Their use may be required to suppress RF noise generated
by your display enough to meet FCC emission standards. Their use may
improve your picture, and certainly won't degrade it.

As an amateur radio operator with transmitters in the same room as my
TV, I use a *lot* of ferrite cores, on the TV, stereo, computers, and
even the answering machine (which emits some nasty interference
around 14 mhz). They do help.

/Chris, AA6SQ

Archived from groups: alt.tv.tech.hdtv (More info?)

Agreed, looping the connecting cables, and even the mains power cable,
through the ferrite cores indeed will minimize spurilous signal emission and
reception. Follow the directives included with the PDP when you finalize the
installation.
"Chris Thomas" <cthomas@mminternet.com> wrote in message
news:MPG.1bbfd2dfe8f3bae9989871@news.mminternet.com...
> In article <DTo5d.18487$6X1.14381507@news4.srv.hcvlny.cv.net>,
> drears@runningpagespam.org says...
>> I just got a new Panasonic plasma HDTV. it came with ferrite cores.
>> The
>> manual says to use them with the incoming cable, PC video cable, and
>> other
>> devices. What is thier purpose?
>
> The ferrite cores reduce both interference pickup and interference
> radiation by/from your display by making it harder for those currents
> to flow in the shield layer of the cables. Their use may reduce the
> pickup of interference from nearby transmitters and other RF
> radiators. Their use may be required to suppress RF noise generated
> by your display enough to meet FCC emission standards. Their use may
> improve your picture, and certainly won't degrade it.
>
> As an amateur radio operator with transmitters in the same room as my
> TV, I use a *lot* of ferrite cores, on the TV, stereo, computers, and
> even the answering machine (which emits some nasty interference
> around 14 mhz). They do help.
>
> /Chris, AA6SQ