[sdiy] ASM Capacitors/Bench Power Supplies

[Magnus Danielson]

From: Ian Fritz <ijfritz at earthlink.net>
Subject: Re: [sdiy] ASM Capacitors/Bench Power Supplies
Date: Thu, 31 Jul 2003 15:22:13 -0600

> At 03:05 PM 7/31/2003, Ian Fritz wrote:
> >At 01:46 PM 7/31/2003, Neil Johnson wrote:
> >>Ian,
> >>
> >> > >In general, ceramics is bad due to leakage, memory effects, tempco etc.
> >> >
> >> > Well, these are the words we always hear, of course, but what are the
> >> > numbers???
> >>
> >>Bob Pease's article:
> >>
> >>         http://www.national.com/rap/Application/0,1570,28,00.html
> >>
> >>Neil
> >
> >This shows NP0 and polystyrene as very similar.  And much worse than other 
> >ceramics.  As far as mica ... I understand that it depends on the quality 
> >(source) of the mica itself.
> >
> >   Ian
> 
> Woops!  much *better* than other ceramics

Yeap, I thougth something where fishy there... ;O)

NP0 is what makes you start to believe in ceramics again.

I've too seen the comments on Mica. While you are at it, do read Bob:s little
article on Teflon. Teflon (PTFE - PolyTetraFlourEten) is a good isolator, a
little too good if you ask Bob ;O)

There is many lessons to be learned.

Cheers,
Magnus