-> i dunno... i don't design, engineer or manufacture them ;) 
 
-> all i know is what i was told at some point back in the past when i went 
-> looking for some for a project... 
  
Hmmm... When I was a student, my friends and I built a lot of 
electronic stuff. There was also a guy who knew nothing, but liked to 
be a hanger-on, getting in the way. 
  
One day, to get rid of him for a while, we asked him to go to a store 
to buy some components. One of them was a one-farad, 400-volt, 
electrolytic capacitor. 
  
He came back, HOURS later, saying that he couldn't find one. 
  
Don't always believe what you're told. 
  
                      dow 
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