qwerty 0 Report post Posted March 26, 2010 i read from wikipedia http://en.wikipedia.org/wiki/Black_Gate_%28capacitor%29, it says "The quality of capacitors may vary considerably depending on their construction and the type of insulating materials used. They are also known to deteriorate (or "drift") over time, just like any electrolytic capacitor." after what time period this deterioration will appear ? any gurus on caps ? Share this post Link to post Share on other sites
wwenze 0 Report post Posted March 28, 2010 A few years for it to get noticeable. ESR starts to increase, then capacitance drops. Share this post Link to post Share on other sites