Grounding Problem???
To all those more expert than I (which is most of you):
I recently installed a Panasonic CQ-R925 head unit (very happy with it, by
the way) in my 98 Contour. I used all the factory harnesses and the
original speakers. The unit has an AUX input on the front, through which I
play my portable CD player. When I use the player's cigarette lighter power
adapter I get a nasty buzz, which goes away completely when I run the player
off batteries. Not the usual alternator whine: the noise is constant
frequency. I think it's a ground voltage problem. Is there an easy fix, or
should I just stick with the batteries?
All advice greatly appreciated.
MG
ApprenticeRating: 0%, 0 votes
portable CD player hooked up directly to my Rockford Fosgate amp, and I
would get those annoying pops and static when I was powering the CD player
off of the car, but it was crystal clear when I used batteries. SO, I went
to Wal-Mart and get a Scosche EFX ground loop isolator, and it basically
went away(it's not even audible when the CD player is playing). So, try a
ground loop isolator, and if it doesn't work, take it back.
--
Stalker
96SL1a BkGd/Tn AC SP AU++++ DFW SR NG
712ejd$ot @oak.prod.itd.earthlink.net...
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interefering with the audio side of it?
Brian
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car audio which I found on the net, and it may interest you.
"Many people report problems while playing CDs from a portable CD player
into their car audio systems. The problem, stated very simply, has to do
with the stepping of the motor requiring a varying amount of current and
non-isolated power and audio signal grounds. Using a liberal application of
capacitors and inductors, this voltage variance can be restricted to a
window of 8.990 to 9.005V for a 9V CD player, yet even the swing between
these two levels is enough to cause annoyingly loud noise on the outputs. It
has been reported that this entire problem can be solved by using a true
DC-DC inverter at the power input to the CD player."
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