Originally posted by vancouver
Yeah I have like 10 of them laying around that came with my plasma. What type of interferences are there? and what would the Ferrite cores help with? Would it be worth sticking more then one on the same cord if I have it?
I'm no engineer, but RFI and EFI come to mind (radio frequency interference and electromagnetic [electrical?] frequency interference). They create various kinds of noise that can be seen in the picture, wavy lines, bright flashing dots, etc. I'm sure you've seen them somewhere at sometime or another. The ferrite cores attenuate those, acting much like a filter, I guess.
Usually one per connection is considered enough, generally mounted near the "in" end. I saw two suggested someplace, so that's what I used on my main component connection since Panasonic generously gave me more than I needed otherwise. Probably overkill, but I used one at each end because I used to have quite a bit of EFI with my old TV. I could sometimes "see" my refrigerator or wall furnace running. I have a number of other small motors nearby as well.
I might have left the ferrite cores in the box like most people, but my EE daughter was in town when I set up my plasma and she thought I should install them, so I did. I've had no RFI or EFI problems since, but I don't know whether the ferrite cores had anything to do with that or not.
I'm not sure they will solve your problem, which doesn't sound like noise, but it won't cost you anything other than a few minutes time to give them a try. They are easy to put on, and they won't do any harm. They must have some value or you wouldn't see them on so many computer connections.