Re: Dents in my MMC?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Hi Jimmy,

At 05:38 PM 3/19/2004, jimmy hynes wrote:

>Message from  yahoo-dot-com.
>Unable to deliver message to the following address(es).
>
><tesla-at-pu0000pman-dot-com>:
>Sorry, I couldn't find any host named pu0000pman-dot-com. (#5.1.2)
>
>Hello everyone,
>
>I have discovered some weird dents in my MMC. They are all in the middle, 
>and seem to go all the
>way around the capacitors. Here's a picture of what I am talking about:
>
>www.hot-streamer-dot-com/chunkyboy86/temp/mmc.jpg
>
>In their life, I have pushed them past their voltage rating, but not far 
>enough for them all to
>break down (3900v). The RMS current may have been above their rating for 
>up to a minute, but I
>have never measured it, so I don't know for sure. The peak current has 
>always been way below the
>max rating.
>
>Does anyone know what caused these? Is it a sign that I am pushing these 
>too hard, or is it just
>something that happens?
>
>
>=====
>Jimmy


That looks like just the normal area in the middle where the two end plates 
come to an end.  There is not as much material there so it sinks in 
some.  Nothing to worry about.

Cheers,

         Terry