Humming noise
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Lead Driver
Joined: Mar 2004
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Humming noise
I changed over ten 4 foot florescent light fixtures to LED. Light is a lot better but now the stereo has a loud hum, shut the lights off and no more hum. Anyone know whats up with this ?
Cargo Master
Joined: Apr 2003
Posts: 3,476
Likes: 224
From: Frequently frozen MN
Not sure of the exact deal, but there are switching circuits in LED bulbs. The LEDs are basically diodes and they only conduct in one direction--they may use a master rectifier circuit or just let the LEDs do it themselves, but the something is switching on and off at 60 Hz(cycles per second).
Fun fact -- got a fidget spinner once -- for a buck. Anyway, when I spun it near an LED light source it would seem to stop and rotate backwards like the stagecoach wheels in the old tv shows. So, the light was being pulsed and working like a strobe.That switching is making electrical noise that's picked up by your stereo.
What can you do -- I'd try the interwebs for fluorescent LEDs and electrical noise -- there may be installation tricks or products that can help.
good luck,
hj
Fun fact -- got a fidget spinner once -- for a buck. Anyway, when I spun it near an LED light source it would seem to stop and rotate backwards like the stagecoach wheels in the old tv shows. So, the light was being pulsed and working like a strobe.That switching is making electrical noise that's picked up by your stereo.
What can you do -- I'd try the interwebs for fluorescent LEDs and electrical noise -- there may be installation tricks or products that can help.
good luck,
hj
Thread Starter
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Lead Driver
Joined: Mar 2004
Posts: 8,922
Likes: 153
Not sure of the exact deal, but there are switching circuits in LED bulbs. The LEDs are basically diodes and they only conduct in one direction--they may use a master rectifier circuit or just let the LEDs do it themselves, but the something is switching on and off at 60 Hz(cycles per second).
Fun fact -- got a fidget spinner once -- for a buck. Anyway, when I spun it near an LED light source it would seem to stop and rotate backwards like the stagecoach wheels in the old tv shows. So, the light was being pulsed and working like a strobe.That switching is making electrical noise that's picked up by your stereo.
What can you do -- I'd try the interwebs for fluorescent LEDs and electrical noise -- there may be installation tricks or products that can help.
good luck,
hj
Fun fact -- got a fidget spinner once -- for a buck. Anyway, when I spun it near an LED light source it would seem to stop and rotate backwards like the stagecoach wheels in the old tv shows. So, the light was being pulsed and working like a strobe.That switching is making electrical noise that's picked up by your stereo.
What can you do -- I'd try the interwebs for fluorescent LEDs and electrical noise -- there may be installation tricks or products that can help.
good luck,
hj
Fleet Mechanic
Joined: Jul 2005
Posts: 1,464
Likes: 104
From: Staten Island, NY
I have a number of wireless devices in my house - wireless driveway alarm, wireless water leak detector etc. They can't be within 15 feet of any lamp with an LED bulb installed or they go crazy. LED's use driver circuits. Cheap LED's from you-know-where don't bother to engineer any filtering or shielding ($$$) into their design. They simply radiate tons of RF harmonics. I don't know if some of the more well known brands (Phillips, GE etc.) are any better but I doubt it.
Being green has consequences.
Being green has consequences.
Hotshot
Joined: Dec 2005
Posts: 10,250
Likes: 7,678
From: Chino Valley, Arizona
did you remove the transformers and re wire them to 120v?
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Lead Driver
Joined: Mar 2004
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Yes I did.
After some reading I see ring core Ferrite bead clamp noise filters are the only hope outside finding a receiver that has built in resistance. I think I'll just live with it for now because there is a lot more light and no more ten transformers running the electric bill up.
After some reading I see ring core Ferrite bead clamp noise filters are the only hope outside finding a receiver that has built in resistance. I think I'll just live with it for now because there is a lot more light and no more ten transformers running the electric bill up.
i ain't rite
Joined: Mar 2005
Posts: 65,514
Likes: 5,567
From: Marlboro Mental Hospital.
i got rid of the old florescent shop lamps and replaced them with Philips led light fixtures..
no issues, no noise in the stereo, and no more waiting for the bulbs to warm up when cold.
another plus is they are daylight fixtures instead of the old "yellow light" soft white light bulbs.
no issues, no noise in the stereo, and no more waiting for the bulbs to warm up when cold.
another plus is they are daylight fixtures instead of the old "yellow light" soft white light bulbs.
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