Wrong formula? Re: [OT] Dodgy electrolytic in 3COM hub

From: Gene Buckle <geneb_at_deltasoft.com>
Date: Tue Mar 16 10:28:21 2004

> At 07:07 AM 3/16/04 -0800, Gene wrote:
> >> I've got a Gigabyte motherboard from the same period with the issue ...
> >> three caps on the board are bulging or split on top. I bought three of
> >> the same model boards at the same time and only one of them have had
> >> that happen.
> >>
> >The cap failure is due to a formulation error. The formua was stolen
> >from a competeing cap mfr, and they got it just a little bit wrong. There
> >was a big write up about this when it was first discovered.
>
> I haven't heard about that. Do you have a link to the write up? I did
> hear about a lot of faulty caps due to a supplier that sold bad batch of
> electrolyte to a lot of the cap manufacturers. What formula do you need
> for caps? AFIK it's just a matter of buying them for the applicable
> voltage. Yes there are formulas for capacitanace to achive the necesssary
> filtering but the wrong results there won't cause them to burst.
>
Unfortunately, I don't have a link handy. The "formula" I was referring
to is the chemical mix used to actually manufacture the capcitor, not the
one used in choosing it for a circuit.

g.
Received on Tue Mar 16 2004 - 10:28:21 GMT