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Old 17th September 2002, 10:12 PM   #11
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Computer grade is a phrase left over from the good old
days of computing when they had linear supplies that
drew tons of amps all day long.

Nowadays they all seem to have switching supplies and
much smaller capacitors. The big cans are still readily
available, however industry in general has switched over
to PC mount snap in caps.

These work fine, but don't have the aesthetic appeal of
the big barrels.

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Old 18th September 2002, 01:28 AM   #12
PedroPO is offline PedroPO  Portugal
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Quote:
These work fine, but don't have the aesthetic appeal of
Is this what you are talkin' about?

I guess if today PC PSU used big dadies like this one they wouldn't crack up so often ( like mine, a week ago)
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Old 18th September 2002, 01:30 AM   #13
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Old 18th September 2002, 05:14 AM   #14
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Here is another example of some computer grade electrolytics, in their "native habitate" none the less(and still working).
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Old 18th September 2002, 07:28 AM   #15
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Need a picture of computer grade capacitors.
No problem at all.
See

best regards,
Leon
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Old 18th September 2002, 07:38 AM   #16
kirc is offline kirc  Slovenia
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Sprague on picture:

The 30,000uf 75V caps date code is 8008
8th week of 1980, and still has over 30.000uF capacity

best regards,
Leon
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Old 18th September 2002, 08:34 PM   #17
Apex Jr is offline Apex Jr  United States
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Default Computer Grade Caps

I see your picture; and the differance to think about is the
size. The older the date code the larger they will be.
I suspect your 30,000uf 75V cap is 3" Dia and about
5" high. My 26,000uf 75V are only 2" dia and 4 1/8" high
And there still making them smaller. Technology changes.
Steve
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Old 19th September 2002, 07:49 AM   #18
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Small caps get hot. Not enough surface area on the can to get rid of the heat. The hotter they run the shorter the life. Check the specs for the ripple current ratings.
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Old 19th September 2002, 07:49 AM   #19
kirc is offline kirc  Slovenia
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Yes, it's about 3.15" dia and 6.3" high.
Technology changes

best regards,
Leon
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Old 19th September 2002, 11:21 AM   #20
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Has anyone held a RIFA (from Sweden of course!) cap in your hand? Shake them! What do you hear? Fluid inside which flows! The RIFA caps has lots of electrolythic fluid so they will last for a very long time.

To be short:

Computer grade:

Pros:
Can take very much current
Lasts long

Cons:
Expensive or very expensive
Big

Sonic properties, I have no idea.
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