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> Buzzing Charger
jfv
post Nov 6 2006, 10:45 AM
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One of my chargers (original Sharp, the US model 100-240V) has started making a high pitched buzzing noise when it's plugged in. Seems to work OK though. Should I get rid of it, or is it OK to use it?

Thanks for any info.

Felipe
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jfv
post Nov 7 2006, 06:51 AM
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Thanks Marc. I actually have two of these chargers and one is buzzing a lot louder than the other. But as long as poses no risk, I'll keep it around.

Felipe
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daniel3000
post Nov 7 2006, 07:07 AM
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QUOTE(jfv @ Nov 7 2006, 04:51 PM)
Thanks Marc. I actually have two of these chargers and one is buzzing a lot louder than the other. But as long as poses no risk, I'll keep it around.

Felipe
*


Usually this is becasue of badly fixed coil windings in a transformator, which then begin to vibrate due to the alternating current and resulting alternating magnetism.
Even the (lightweight and small) switched AC adapters have small transformators inside, so this could be the reason for Z adapters, too.

This is usually no risk, but if this vibrating gets heavier, it may theoretically lead to mechanical damage of e.g. the insulatoin of the coil wire. Not sure if this can happen and what it can cause.

daniel
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