Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

What qualifies a capacitor as "computer grade"?
What qualifies a capacitor as "computer grade"?
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th October 2002, 06:25 PM   #1
G is offline G  United States
diyAudio Member
 
G's Avatar
 
Join Date: Apr 2002
Location: Belleville, IL.
Default What qualifies a capacitor as "computer grade"?

Do they have low ESR and quick recovery?

G
__________________
Gavin
  Reply With Quote
Old 24th October 2002, 06:29 PM   #2
till is offline till
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
try to search, this was allready diskussed some time ago.
  Reply With Quote
Old 24th October 2002, 06:37 PM   #3
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
What qualifies a capacitor as "computer grade"?
They are big, can dissipate much heat (much current), lasts long due to much electrolythic, are reliable.

In short: they are made for heavy duty applications, like high power supplies.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Group buy: SSR03 Super Regulator Power Supply. Sign up HERE 18 pcb's in interest so far.
  Reply With Quote
Old 24th October 2002, 06:41 PM   #4
hifi is offline hifi  Sweden
diyAudio Member
 
Join Date: Mar 2001
Location: sweden
As found in all computers =) ....

well in the time before switching supplies anway.....

/micke
  Reply With Quote
Old 25th October 2002, 01:49 AM   #5
Dozuki is offline Dozuki
diyAudio Member
 
Join Date: Jul 2002
Location: Naptown
Out of curiosity, when (approximately) did computer manufacturers swithch over to switching supplies?

-D.

(I have yet to see a big can in any computer I've cracked open, huge- ancient HDs, but no cans)
  Reply With Quote
Old 25th October 2002, 03:16 AM   #6
Lisandro_P is offline Lisandro_P  Argentina
diyAudio Member
 
Lisandro_P's Avatar
 
Join Date: Oct 2000
Location: Argentina
Send a message via ICQ to Lisandro_P
Um... i think PC's have been carrying switched power supplies since they become "personal" (that's it, not occupying a whole room ).
  Reply With Quote
Old 25th October 2002, 04:49 AM   #7
roddyama is offline roddyama  United States
diyAudio Moderator Emeritus
 
roddyama's Avatar
 
Join Date: Jan 2002
Location: Michigan
Gavin,

Here is a good place to start. Take a look at this link.
http://www.capacitors.com/pickcap/pickcap.htm

Than you can do some searches on this site and see what's being said about different capacitors. You'll have to make your own jugements from there.

Rodd Yamashita
  Reply With Quote
Old 25th October 2002, 05:42 AM   #8
Fred Dieckmann is offline Fred Dieckmann  United States
diyAudio Retiree
 
Join Date: Oct 2002
Location: Spain or the pueblo of Los Angeles
Default "computer grade"?

What qualifies a capacitor as "computer grade"?
Simple....certification as kosher by a computer Rabi.

Actually the Peranders answer pretty well spells it out. I don't know that there is a set of actual engineering parameters, although capacitor lifetime and 105 degree centigrade rating would be good indicators. Capacitors designed for swiching power supplies have low ESR and low indutance and are usually excellent choices for audio circuits and especially power supplies. This was also true with photo flash capacitors a few years. The new technology of organic semiconductor capacitor are becoming produced by several manufacturers and are exceptional power supply capacitors.

Why does the term "computer grade" evoke the following terms for the cynic in me?

'" Industrial Strength"
"New and Improved"
"Advanced'
"New formula"
"Extra Strength"
"Delux"
"Now with (insert tradename here)"
" Now with 20% more ....."
"Controlled release"
" the most powerful .... that you can get withou a prescription"

Shalom y'all,
Fred
Attached Images
File Type: gif stark.gif (1.7 KB, 798 views)
  Reply With Quote
Old 25th October 2002, 08:03 AM   #9
jh6you is offline jh6you
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
Gee...
The 16:9 was better IMHO.

JH
  Reply With Quote
Old 25th October 2002, 08:31 AM   #10
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
What qualifies a capacitor as "computer grade"?
Default Re: "computer grade"?

Quote:
Originally posted by Fred Dieckmann
Actually the Peranders answer pretty well spells it out. I don't know that there is a set of actual engineering parameters, although capacitor lifetime and 105 degree centigrade rating would be good indicators. Capacitors designed for swiching power supplies have low ESR and low indutance and are usually excellent choices for audio circuits and especially power supplies.
Sometimes I wonder if pcb mounted heavy duty caps are better than these big mamas, with long wires. Computer grade caps (those we talk about here, big with screw connections) are never(?) seen in amps. Has anyone seen classical computer grade caps in a commercial amp (except for Bladelius Designs Group)?
__________________
/Per-Anders (my first name) or P-A as my friends call me
Group buy: SSR03 Super Regulator Power Supply. Sign up HERE 18 pcb's in interest so far.
  Reply With Quote

Reply


What qualifies a capacitor as "computer grade"?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Do we really need high priced "audio grade" power resistors? panson_hk Parts 11 14th June 2016 10:14 AM
Computer Grade Capacitor?? ghee0 Solid State 7 13th September 2014 01:40 AM
Urgent sale of NOS (produced in 1996) PCM63 "K" grade DAC's. Altmustech Swap Meet 1 27th August 2006 10:56 AM
Urgent sale a lot of NOS (produced in 1996) PCM 63 "K" grade! Altmustech Parts 0 26th August 2006 11:41 AM


New To Site? Need Help?

All times are GMT. The time now is 11:07 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki