[sdiy] Dead capacitors

Ian Fritz ijfritz at comcast.net
Wed May 11 16:01:15 CEST 2011


>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 



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