Talk:Ferrite bead

Poor, Confusing, Bad article

I have no time now to improve it and I wonder why nobody cares. Neonil 13:52, 23 April 2007 (UTC) IMO ferrite beads is one of the most significant discoveries in electronics in recent 20 years but still nobody can tell anything except high end analog or power supply gurus. Do I really have to write this article? Neonil 13:55, 23 April 2007 (UTC)[reply]

I don't know about the discovery of these being in the last 20 years, but they have only become greatly necessary recently, as generally circuits below 4mhz don't need them as much. Higher frequency circuits need them a lot more. Also, note that the picture here is not technically a "bead" -- it is too big. I've seen ferite beads and cores used in two ways:

Beads on small wires intended to carry DC input or output will block high frequency RF noise from traveling past the bead. Typically, low frequency and DC lines coming off of high frequency circuits use beads like this.
Large beads and ferrite cores on coax cables prevent high frequency RF signals from using the shield of the coax as an antenna, allowing only balanced signals between the shield and center conductor to flow. (See also balun.) This is what is in the picture. (Note: when I first typed this, the picture was clearly a balun. Now it is a better picture that could be considered a large bead that is also a balun.)

(I've moved the list of related articles into the article.) Maybe someone else can expand on these and add them to this article, or merge this article with some of the above links. --ssd 14:58, 12 August 2007 (UTC)[reply]

Disagree with merging this topic.windsun

I've removed the merge request. This isn't the same as a balun. --ssd 04:35, 26 August 2007 (UTC)[reply]

There is a better article for this technology

After doing some research, I see that this article is pretty much unnecessary and is better described in the much better article Magnetic core. I'm turning this into a redirect and will salvage anything useful from here to put into that article. DMahalko (talk) 00:15, 23 March 2009 (UTC)[reply]

You are ABSOLUTELY wrong. :) But if nobody cares I will too. Ferrite beads are NOT inductors, not cores, not pods, not rods, not chokes, not everything else; they are devices especially designed to use resistive impedance at high frequencies for noise suppression. I don't want to be offensive, but what you're doing demonstrate your absolute ignorance in the subject. Cheers, Neonil (talk) 16:06, 15 April 2009 (UTC)[reply]

It is clear from the edit history that this started as "your" article, so of course you have returned to "defend" the article you WP:OWN. The fact that you state that this is not a choke shows that you don't understand the purpose at all, because that's exactly what this is. It passes some frequencies but blocks others, which is what tuned inductors do. DMahalko (talk) 00:50, 17 April 2009 (UTC)[reply]

By saying things like "pass frequencies" or "block frequencies" you demonstrate your ignorance again. I can help you understand: Inductor and bead both "block high frequencies", but bead dissipates high frequency energy, while inductor (ideal one) does not. And the second thing: I don't own this article, but nobody permitted deletion of article in Wikipedia, except for reasons listed in WP:DP. I wait for people to improve this article, not to delete it. There are facts not clearly known regarding ferrite beads (resistive property degradation due to bias current) and there are things completely unknown (good mathematical theory), so I expected some expert to disclose them here one day. Neonil (talk) 12:46, 5 May 2009 (UTC)[reply]