[sdiy] Dead capacitors

[dan snazelle]

On May 11, 2011, at 10:01 AM, Ian Fritz wrote:

> 
>> 2. Are DUD poly caps common?
> 
> This one of the things Bob Pease warned about many years ago.  Yes, there are dud polystyrene caps.  I had a batch of bad 470 pF units -- it took me years to figure out why I just couldn't get some circuits to work.  At one point I tried replacing the cap and that was the problem.  It really doesn't make sense to use polystyrene any more.  C0G or NP0 ceramics work just as well, if not better.
> 
> Ian 
> 

So Ian...NPO ceramics will work in critical situations like timing caps?
or filter caps?


thanks