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Reforming capacitors

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Do you all have any thoughts on reforming crossover metallized capacitors using DC voltage?  Replacement is probably the better option, but I am curious.

Andy

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I posted an article regarding reforming electrolytic caps in this thread.  But there is no mention of other types.

 

 

WMcD

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I really only think of reforming with electrolytics, not film types.  

 

My observation has been that older caps with a lot of mileage may show and/or reform to correct capacitance, but series resistance tends to rise far above that of a new cap, and that is a measurable symptom related to poorer sound.  

 

You might not notice it in a hi-Z position, but in a low-Z position it tends to be obvious.  

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Thanks, Gil; I found and read the article.  I know reforming (including the ongoing, self-healing process of regular use) of electrolytic filter caps is well established and important for good capacitor life, I am just not sure there would be any benefit for metallized crossover caps.  Here is a basic, informative article on metallized cap self-healing for anyone who may be interested: https://blog.capacitorfaks.com/the-self-healing-characteristics-of-a-metallized-film-capacitor/

 

Regards,

 

Andy

 

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EMRR,

 

Agreed: reforming will not help ESR; if a tired cap has a high ESR, it is at the end of its useful service life.

 

Regards,

 

Andy

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