Computer grade caps - Page 2

Nelson Pass · 17th September 2002, 11:12 PM

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.

PedroPO · 18th September 2002, 02:28 AM

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

)

PedroPO · 18th September 2002, 02:30 AM

pic

moses · 18th September 2002, 06:14 AM

Here is another example of some computer grade electrolytics, in their "native habitate" none the less(and still working).

kirc · 18th September 2002, 08:28 AM

Need a picture of computer grade capacitors.
No problem at all.
See

best regards,
Leon

kirc · 18th September 2002, 08:38 AM

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

Apex Jr · 18th September 2002, 09:34 PM

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
Apex Jr

djk · 19th September 2002, 08:49 AM

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.

kirc · 19th September 2002, 08:49 AM

Yes, it's about 3.15" dia and 6.3" high.
Technology changes

best regards,
Leon

peranders · 19th September 2002, 12:21 PM

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.

18th September 2002, 08:38 AM	#16
kirc diyAudio Member Join Date: Aug 2001 Location: Slovenia	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 __________________ Music is a part of my life, DIY is my life.

18th September 2002, 09:34 PM	#17
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	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 Apex Jr

19th September 2002, 08:49 AM	#19
kirc diyAudio Member Join Date: Aug 2001 Location: Slovenia	Yes, it's about 3.15" dia and 6.3" high. Technology changes best regards, Leon __________________ Music is a part of my life, DIY is my life.

19th September 2002, 12:21 PM	#20
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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. __________________ /Per-Anders (my first name) or P-A as my friends call me

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17th September 2002, 11:12 PM	#11
Nelson Pass The one and only Join Date: Mar 2001	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.

19th September 2002, 08:49 AM	#18
djk diyAudio Member Join Date: Feb 2001 Location: USA	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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