lude dude

Ferrite beads (it looks like a magnet that you clamp on your computer wire to stop interference). anybody use these in car audio? would it help?

ancientpimp

U mean car video? I use it as a last resort in home theater installs where the video display gets EMI. I dont think it would hurt if you clamp one on a car video monitor power lead, but i could be wrong.

zzzzzzz

iTrader: (5)

i have seen them on home set up

MTA

iTrader: (1)

is it not more common to wrap power lead in a ferrite H channel or even a straight ferrite rod to prevent line noise? this will actually create a magnetic field depending on current draw

JohnVroom

I have used it, it deals more with HF noise than is common in car audio BUT with noise coming from DC-DC or DC to AC power supplies it should suppress their noise to a point. I found them to be more placebo than solid science, but they had an affect. anything susceptible to EMI noise should benefit from ferrites. They are intended for low level lines like RCA.

lude dude

interesting. I work in a telephone office and the office works in DC and I sometimes see them used.

MTA

iTrader: (1)

its not surprising... RF can interfere with anything especially if it finds a length that is resonant to the frequency in use... for example CB radio in a transport driving by will really interfere with 17 and 18ft RCA cables... just so happens 17 and 18ft is close enough to 1/2 wave of CB frequencies that it will cause resonance if not properly shielded.

wuff

iTrader: (6)

Here are some custom made silver braid rca cords with ferrite beads.

Tom.F.1

iTrader: (1)

those would be good for stopping interference from flourescent lights on a video signal.

yup, that rf interference hurts my ears too..... but only when the moon is full.

JohnVroom

My Delphi XM receiver makes a whale of a whine when getting power from the cigarette lighter, linear actuators and neons can also do it in a car... I think you will find this effect to be measurable and repeatable except this is not a common problem in the car. There has to be a susceptible component... and a source. There are A LOT of PWM/ switching power supplies out there and they are working there way into automotive applications so anything that gets half **** engineered could cause or be susceptible to this.

Besides ferrite's cost pennies, you can try them and if they 'solve' an issue great... if not you have a nice fishing weight or a fat story for your SQ instalation book. This is science, but it is most likely a solution to a problem that you dont have