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EMI noise...
Posted by 85turbosled [Email] (more from 85turbosled) on Wed, 18 Jan 2012 21:14:02
In Reply to: shielding, browneye, Wed, 18 Jan 2012 14:04:21
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your 25 year old car has a distributor ignition system (and maybe even non-resistor spark plugs), which produces tonnes of this type of noise. long lengths of unshielded wire is suseptable to picking this noise up. also the alternator may have a capacitor mounted on the back to get rig of noise...I dont remember if c900's have it, but most Bosch alternators of this era do. If its faulty it makes a whine though the speakers, not the tick-tick your hearing.
In car audio I was always taught to keep all leads as short as possible for these reasons. In some cases the noise suppressors will cure the issue, but in many it wont. If its just showing up now, I would suspect your ignition leads, or perhaps the dist cap/rotor are arcing slightly and making electrical noise.
posted by 173.180.8...
Posts in this Thread:
- audio question about interference to speakers, browneye, Wed, 18 Jan 2012 06:57:08
- Re: audio question about interference to speakers, vsfoxe , Wed, 18 Jan 2012 11:20:12
- run the power down one side of the car and the, vvack0matic , Wed, 18 Jan 2012 07:29:37
- shielding, browneye, Wed, 18 Jan 2012 14:04:21
- EMI noise..., 85turbosled, Wed, 18 Jan 2012 21:14:02 <-- Viewing This Message
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