[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.


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