[sdiy] ASM Capacitors/Bench Power Supplies

[Scott Gravenhorst]

Ian Fritz <ijfritz at earthlink.net> 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

Egad, I never thought about it, but mica is a natural material that can vary
in composition...  Any clues as to what may be good/bad?  Mfr?  Country of
Mfr (due to bad mining sources)?  Or is it worse in that a run of caps could
be fine except for the 5 I got?


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