alternator whine?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=31107
Printed Date: June 18, 2024 at 1:18 AM

Topic: alternator whine?

Posted By: foltzy
Subject: alternator whine?
Date Posted: April 27, 2004 at 8:11 AM

Hey guys, last fall I installed an amp, subs, and satellite radio through my Panasonic radio. Afterabout a month or so, I started to hear a high pitch 'squeal' coming out of my speakers, similiar to alternator whine. So I checked all my grounds to make sure they were secure & hitting bare metal, which they were. I ended up taking out my amp and subs about a month ago, removing the 12v+ wire from my battery, and my RCA's from behind the deck, and i'm still getting this whine. 2 questions..

Could this whining be caused from the RCA's from my satellite radio tunerbox to my radio?

Why am I only hearing this whine when the car is first started up from sitting for a few hours?

...and yes, I have tried RCA filters.
Any help would be greatly appreciated posted_image

Replies:

Posted By: Wiseguy
Date Posted: April 27, 2004 at 1:27 PM

foltzy wrote:

Why am I only hearing this whine when the car is first started up from sitting for a few hours?

are u saying the noise goes away after a couple of hours?

is it in only one speaker or all of them?

make sure none of your leads off your speakers are touching ground anywhere

Posted By: foltzy
Date Posted: April 27, 2004 at 2:06 PM

Yeah, it seems that the 'whining' is the loudest when the car is running for the 1st hour or so. My speakers are all stock, so I doubt that a wire is touching considering they go to a plug, which plugs into a speaker. posted_image

Posted By: kgerry
Date Posted: April 27, 2004 at 5:23 PM

and there is now no amp at all in the system? just deck power to speakers?

-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: SILVERONE1
Date Posted: April 27, 2004 at 6:01 PM

[
Why am I only hearing this whine when the car is first started up from sitting for a few hours?

Whine is loudest initially because alternator is charging at higher rate after start-up until battery is charged.

Posted By: forbidden
Date Posted: April 27, 2004 at 8:47 PM

Unplug the sat radio antenna and see if the sound goes away.

-------------
Top Secret, I can tell you but then my wife will kill me.

Posted By: foltzy
Date Posted: April 28, 2004 at 8:28 AM

yeah, i have just a deck with 4 factory spkrs.

i'll try that...i'll keep all of you informed

thanks for all the help

Posted By: foltzy
Date Posted: April 30, 2004 at 7:37 PM

Beyond further review, my RCA's from my tunerbox to my headunit are screwed up. I think they have discontinued this model, but I'm gonna hit Panasonic up, juuust in case...thanks for everything guys posted_image