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Noise when people turn off lights
Noise when people turn off lights
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Old 5th December 2004, 07:19 PM   #11
DigitalJunkie is offline DigitalJunkie  United States
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I have a loud "pop" everytime a fluorescent light in the next room gets turned on or off.Doesn't matter which amp I'm using,I always hear it.
I've tried: A decent homebrew power filter built in a 6-outlet strip, a R/C (100 ohms .01uf) across the switch,varistors,etc..
It's always there and I can't get it to go away!
The only thing I havn't tried is replacing the fixture,which may happen soon.
Beware of fluorescent lights,and dimmers,they are noisy creatures!

Infact,a few weeks ago a friend was over and we were playing with something on the scope,and we could see noise on the trace from all the dimmers around the house! just a "notch" on the 60hz background noise..the "notch" would move up and down theside of the sine wave depending on the brightness setting of the dimmer.
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Old 5th December 2004, 07:32 PM   #12
karahara is offline karahara  Germany
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I hear this "pop"noise when lights, which are switched by an "Current draw switch"[stromstoßschalter, Eltako, i don't know the right word], are turned on or off

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Old 5th December 2004, 07:42 PM   #13
Bricolo is offline Bricolo  France
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I had this problem on my computer speakers

try to place a ferrite core around the mains cable, and the same with the input cable (if the cable is thin enough, make some turns around the ferrite)

it worked for me
Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease
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Old 6th December 2004, 04:18 AM   #14
gmphadte is offline gmphadte  India
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Location: Dona paula, Goa
Fix a .068µF/400VAC capacitor across the primary of the tranformer. Try nearby value for best results.

I have a loud "pop" everytime a fluorescent light in the next room gets turned on or off
Fix a capacitor of 2/2.5µF/250VAC at the fluorescent light fitting across the mains.

Gajanan Phadte
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