Almost every cable on my PC has one of these thingies on it, near one end.
Sometimes square and sometimes round (cross section), but all about the same length.
Some are easily removable, which is nice because they make threading cables a pain in the butt. Of course I alway put them back on, just because.
Most seem to have a metal core but some are all plastic, I've even seen at least one that was plastic trusses inside.
So inquiring minds want to know...what are they and what are they for?
I suspect they stop static electricity or maybe even voltage surges, but I don't know. :confused:
That is whats called a ferrite( spelln' ) bead , it helps block out RF .
OK, ferrite is Iron, so that explains the metal ones. Thanks. ;)
That is whats called a ferrite( spelln' ) bead , it helps block out RF .
You're
worrying about the
spelling, Zip?!?!?!?!??! Has somebody been getting at you?
I suspect they stop static electricity or maybe even voltage surges, but I don't know.
The ferrite block is an RF filter. But it does not work (well) for frequencies in the AM (longwave) bands. It is mostly for eliminating shortwave, FM, and TV interference. For example a monitor operates in the tens of megahertz range. This is shortwave. Ferrite bead is part of a large system that blocks radiation of those frequencies. Other protection (not the ferrite bead) inside electronics should also make interference not occur to an adjacent AM (longwave) radio.
You're worrying about the spelling, Zip?!?!?!?!??! Has somebody been getting at you?
And the funny thing is, he was spelling it right.
(not to mention he knew what it was for)
I think you should wear a tin foil hat instead of using those.;)
mmmmm...... tin foil hats are tradionally used to block RF *into* the brain.
Fo you to use them to stop RF out of the brain seems like a tad overkill...
The ferrite block is an RF filter. But it does not work (well) for frequencies in the AM (longwave) bands. It is mostly for eliminating shortwave, FM, and TV interference. For example a monitor operates in the tens of megahertz range. This is shortwave. Ferrite bead is part of a large system that blocks radiation of those frequencies. Other protection (not the ferrite bead) inside electronics should also make interference not occur to an adjacent AM (longwave) radio.
Is this because the cable acts as an unintentional antennae?
What about the ones with no metal in them? Fraud? :question:
What about the ones with no metal in them? Fraud?
There IS metal in them ,
just in a powder form suspended in some other medium ,
the one you have the pic of is fragile ,
take it out of the plastic case and drop it ,
you'll see what I am talking about
If there's metal in the ones I'm talking about, it's mixed into the plastic before it's molded.
They look about the same on the outside but when you open them the inside is hollow, except for a couple of truss like ribs for strength.
No part of the plastic is thicker than, I would guess, 0.050", so there's nothing encapsulated.
The stiffening ribs would prevent having a lump of metal inside, that might have fallen out.
I've only seen a couple of them but I'll keep an eye out for one that I can open and photograph. Good shot for the closeups thread. :D
If there's metal in the ones I'm talking about, it's mixed into the plastic before it's molded.
They look about the same on the outside but when you open them the inside is hollow, except for a couple of truss like ribs for strength.
No part of the plastic is thicker than, I would guess, 0.050", so there's nothing encapsulated.
The stiffening ribs would prevent having a lump of metal inside, that might have fallen out.
I've only seen a couple of them but I'll keep an eye out for one that I can open and photograph. Good shot for the closeups thread. :D
BWAAAHAAAHAAA Bruce, you got HOSED!!! They saw you coming a mile away.:p
Yes, but your sympathy and compassion is the lubricant, that makes my rape bearable. :p
:a new bigger louder laughing smilie: