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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: The nonsense of Buzzing capacitors?Posted by Romy the Cat on: 5/1/2010
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 PurePower wrote:
Hi Max,

If you have buzzing that is audible outside the PurePower case, or audible from a listening position, the behavior is not normal. The probable source is a capacitor. Caps can hum in the same way as transformers - the foil expands and contracts and can vibrate at 60 cycles in an effect that is similar to transformer magnetostriction. You should contact us to arrange for service.

I am sorry but it is nonsense! I am not electronics wizard but from a very commence sense it sounds to me absurdish that a capacitor can buzz.  The whole idea of a capacitor is a sequential layering of conductor and dielectric. If the layering is not done tight then the conductors might move up to the point but it happened ONLY in failed capacitors that must not be use anyhow.  However, if a layer moves up to the point that it auditable buzzes then the capacitor is way passed the moment when it might be safely used. The point is that if a cap is so bad in quality that the layers buzz then the cap does not perfume it’s capacitive duty sand most likely will be shorted very soon. Still, I do not believe that commercially made caps, that wounded by high tension-machines would buzz.

The Cat
 

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