Ignoramus22732 wrote:

How about these huge capacitors from the demolished UPS?

See

http://igor.chudov.com/tmp/capacitors/

The cup is pictured for size comparison.

Are they 4.1 farad each or they are 4.1 millifarad?

The 'm' is a leftover from the olden days, when it meant 'micro', not the
metric standard 'milli'. Milli is not used in capacitor rating. Pico, micro
then Farads. New capacitors would be probably marked with the 'u' instead of 'm'

So, they are 4100 microfarad capacitors


They are rated for

300V. Are there PCB in them?

I don't know. Maybe Tantalum or Aluminium oxide?

http://www.radio-electronics.com/inf...itor_types.php


These guys found an interesting use for them:

http://www.4hv.org/archive/topic.22395.html



mike

--
He was the sort of person who stood on mountaintops during thunderstorms in
wet copper armour shouting "All the Gods are *******s."

Terry Pratchett