Video Asylum

TVs, VCRs, DVD players, Home Theater systems and more.

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RE: Not a noisy environment............

Posted by mdavis on July 18, 2007 at 17:47:21:
A longer cable certainly doesn't help but I agree that the length doesn't seem to be the culprit in this case. Separate circuits certainly help to cleanup the power but they don't block everything, you still have junk comming in from the main powerline. Also, noise (EMI/RFI) comes from everywhere not just your powerline. Your TV could even be emitting noise. A refrigerator, switching power amps, an air conditioner, any electric motor or generator, etc. You have narrowed the problem down to the cable so why don't you barrow two 25' cables. One with filters and one without and try them both. If both work then your cable was defective. If only the one with the ferrite cores works then you have a noise problem. If neither work then it's something else although I would find that hard to believe after your experiment.