Electrical noise in sound system

Submitted: Thursday, Jan 07, 2010 at 20:28
ThreadID: 126287 Views:2594 Replies:3 FollowUps:4
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Hi all
I have a noise problem that only happens once the solar regulator reaches 14volts and at the same time while running the inverter the inverter shows 12.9 volts. Under these numbers there is no noise but once these numbers are reached the noise returns. It comes through both the tv and radio. If I mute the sound the noise is still there so it is not coming through the speakers.

If I use something electrical such as water pump or whatever the volts drop below those stated above and the noise stops. Once the electrical appliance is turned off and the volts return to the high end the noise returns.

Anyone had this happen? How can I stop the noise as it seems to be related to solar charging and float.

Regards
Jack


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Reply By: Motley - Thursday, Jan 07, 2010 at 22:08

Thursday, Jan 07, 2010 at 22:08
I had that problem when we first got our van in 2003. At one of the rallies, Brian Bugenhagen from Sound in Motion attended with one of his techies and they fitted something (a resistor??) in the switch box and the problem went away.

I suggest you give Brian a call and find out what the solution is. I think it's something any handyman could do once you know about it.

Click on Sound in motion sponsor link for contact details.

Good luck.
Motley

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Follow Up By: Bushpig - Friday, Jan 08, 2010 at 02:30

Friday, Jan 08, 2010 at 02:30
Thanks Motley. Will do.
Cheers jack
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Follow Up By:- Friday, Jan 08, 2010 at 02:52

Friday, Jan 08, 2010 at 02:52
More like a filter capacitor Pete
Noise is most likely caused by the gadgets goinging into current limiting mode using pulse width control. This generates a square wave which is inherently electrically noisy.
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Follow Up By: Motley - Friday, Jan 08, 2010 at 03:10

Friday, Jan 08, 2010 at 03:10
I KNEW I shouldn't have tried to convince you that I had the faintest idea what the Sound in Motion guys did to fix the problem.

I should have stuck to the generic description of "a thingy with a wire out each end"!

Anyway Jack, what Ernie says sounds right. Thanks Ernie

Motley

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Reply By: Bushpig - Friday, Jan 08, 2010 at 04:50

Friday, Jan 08, 2010 at 04:50
Thanks Ern
now...a filter capacitor?? Where does this thingy go? Can I do it or is this a SIM job?
Cheers Jack
AnswerID: 579584

Follow Up By:- Friday, Jan 08, 2010 at 07:37

Friday, Jan 08, 2010 at 07:37
Jack I'de do as Pete suggested. They would have the right gear as there all sorts of filter capacitors. No doubt they will send you one with the fitting instructions.
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Reply By: Wilmo7 - Sunday, Jan 10, 2010 at 06:01

Sunday, Jan 10, 2010 at 06:01
I have had that problem and it is increased if you have the volume on the X-media Dream Box too high (the green buttons) Much better to keep it lower and use the volume on the taped deck/radio to get the sound you want.
Len
AnswerID: 579585

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