Re: mmc testimonial

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Greg,

On 19 Feb 2002, at 8:12, Tesla list wrote:

> Original poster: "Mr Gregory Peters by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
> 
> Malcolm, 
> 
> I pulled apart one of the caps. The outer layers were made with foil, 
> about the same thickness as regular kitchen foil. However, the inner 
> layers appear to be polypropylene with a "shiny" coating that is 
> translucent. It looks like the silvery plastic bags you get computer 
> parts in.  Isn't this metallised polypropylene? 

Sounds like it - in which case, the spec isn't telling the whole 
truth. However, I wouldn't personally treat self-healing properties 
as a panacea for marginal designs. If the cap periodically breaks 
down and heals, its capacitance will be changing. I must pull one of 
mine apart and check.

Regards,
Malcolm

 
> Greg Peters
> Department of Earth Sciences,
> University of Queensland, Australia
> Phone: 0402 841 677
> http://www.geocities-dot-com/gregjpeters
> 
> 
> 
> 
> 
>