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echo: tech
to: Matt Mc_Carthy
from: Roy J. Tellason
date: 2003-09-13 20:01:32
subject: Mainboard-Bulging Ca 1/

Matt Mc_Carthy wrote in a message to Greg Easthom:

 MMC> The caps that have been failing here are 6.3V rated, and running 
 MMC> at +5V.  That's too close to the "1000 hour lifetime", and I 
 MMC> would _expect_ them to fail near that time (a measly 41.6 days!)

That's not near enough headroom for my comfort.

 MMC> For that reason, I've been replacing those caps with 3X voltage
 MMC> caps, and often 'shoehorning' them in.  

 MMC> With boards 'shrinking' so fast, there's often not much a board
 MMC> manufacturer can do, so they are forced to 'fudge' on 'headroom'.

A _bad_ place to cut corners.

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