I'm working for a electronic ballast factory, we use some high quality
E-caps, they can withstand high ripple current at high frequency.
Different applications require different constructed capacitor, the
one in electronic flash can withstand very high current
charge/discharge. Their size are also very compact, I don't think you
can find audio cap with same capacitance and voltage that fit. Their
capability to withstand charge and discharge will also differ.
The leakage of good quality E-cap usually small enough to cause you
trouble on standby consumption. The one using on your quality flashes
should belong to this class. A E-cap should be fully re-conditioned in
the first few minutes charge. Leakage is the main concern for long
storaged E-cap, no knowledge about "power" capacity, they should only
related to the capacitance for a fixed voltage. The high current
discharge capability was already fixed by design.
C.H.Ling
Chris Charlton wrote:
> Thinking back to my electronic engineering course at
> uni, electrolytic caps need to be conditioned before
> use to work when new, they do degrade with time,
> rather quickly, if I remember they exhibit more
> leakage and a lower overall "power" capacity. If you
> weren't afraid of opening up your flash guns, very
> high quality audio grade capacitors are available that
> would give a more consistent output and last longer,
> they also have less leakage which means while your
> flash is charged but idle, it will consume less
> battery power. Have a look for:-
>
> Elna Cerafine/Silmic
> Sanyo caps
>
> There are other types but these are the ones I
> remember off the top of my head. Look under
> professional audio grade caps and suppliers.
>
> Chris
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