About capacitors for PC motherboards...

[~misfit~]

Franc Zabkar wrote:

On Wed, 30 Aug 2006 00:25:56 +1200, "~misfit~"
misfit61nz@yahookers.com.au> put finger to keyboard and composed:

Franc Zabkar wrote:
On Mon, 28 Aug 2006 09:56:23 +1200, "~misfit~"
misfit61nz@yahookers.com.au> put finger to keyboard and composed:

Ok, so the main caps I need are low ESR, 3,300uF, 6.3v, 10mm
can, 5mm lead-spacing (25mm high but that's unimportant,
there's room to go higher) electrolytic caps. I can't seem to
source these anywhere in this wonderful country of mine. I've
been told I can get them in 15mm diameter cans which is
unacceptable as there is a row of five tightly satcked together.

Farnell have 10V, 12.5mm dia caps at AU$3.67 + GST:
http://au.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=1144687

Alternatively, WES Components, Ashfield NSW, have 10V, 13mm dia,
low ESR, Hitano EXR series caps, AU$1.15 including GST (trade).
http://www.wescomponents.com/datasheets/EXR.pdf
http://www.wagner.net.au/Catalogue/02_09.pdf

The same series has a 6.3V, 3300uF, 10mm dia cap, but WES don't
list it in their 2003 catalogue, or their Nov 2005 supplement.

- Franc Zabkar

Thanks Franc. However, these caps are really bunched up, I *need*
them to be 10mm. :-(

Search for EXR3300/6.3 at http://www.x-on.com.au/ (Hitano agents)

You can get 10 for $40, or 5 for $36, including $15 freight, GST, and
a $15 penalty for ordering less than $200 worth of goods. :-(

You may be able to avoid the freight cost if you live near one of
their offices:
http://www.x-on.com.au/contact.asp

- Franc Zabkar

Thanks Franc,
--
Shaun.

 

[Eeyore]

Joel Kolstad wrote:

"Eeyore" <rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> wrote in message
news:44F92D67.CC93418D@REMOVETHIS.hotmail.com...
Designers do know stuff that techs don't though.

Seems like that would depend on the designer and tech in question... there are
plenty of freshly-minted EEs out there today who couldn't bias a transistor to
save their lives... although if that isn't their job, I suppose it doesn't
really matter...

Few freshly minted EEs would have designer level skills. Of course that doesn't
stop some ppl hiring them in that capacity.

Graham

 

[stanley]

~misfit~ wrote:

Hi folks, new poster, electronically challenged....

I hope you will be kind enough to help me, I face the following problem:

I have a motherboard in one of my PCs that has gone all flakey. It has bad
cap syndrome. The low ESR electrolytic aluminium can caps are bulging and
leaking. I know that this problem was rife around 2000/2001 but thought it
fixed by the time I bought this board, 2003. Sadly not true. The board
itself has been, up until the caps failed, an excellent, stable and very
useful bit of kit.

I have replaced capacitors on motherboards before with success so am not
worried about that side of things. My problem lies in the fact that I live
in New Zealand. It seems that it's just about impossible to get a handful of
caps the same specs as the ones on the board anywhere. I've found suppliers
in the US but not any who will ship *outside* of the US. As I assemble
computers for a hobby and used this same model mobo in a few different
builds for friends I'm expecting to see others with the same problem soon
too.

Ok, so the main caps I need are low ESR, 3,300uF, 6.3v, 10mm can, 5mm
lead-spacing (25mm high but that's unimportant, there's room to go higher)
electrolytic caps. I can't seem to source these anywhere in this wonderful
country of mine. I've been told I can get them in 15mm diameter cans which
is unacceptable as there is a row of five tightly satcked together. I've
tried for Nichcon and Rubycon first as I hear that these are good caps. The
local Nichicon agent said they don't have them ex-stock but could order them
in. A minimum order of 2K pieces and a 90-day turn-around! I need 5 for a
start, maybe another 20 later. You wouldn't believe how difficult a
seemingly easy thing like this has turned out to be.

So, to the advice I'd like: A year or two back, when I first struck
motherboards with bad caps a guy I met on a NZ newsgroup offered to get me
some suitable caps as part of his next order (which lead me to assume he was
"in the trade"). The caps needed for those three mobos I was hoping to fix
were the ame spec, 3,300uF 6.2v.... Anyway, the caps he sent me were 2,200
10v and he said the should be fine. He couldn't get the exact match. I went
ahead and fitted the caps and the motherboards worked fine. I still have one
of them running the PC I use for a stereo/mp3 jukebox that runs 24/7.

The board I'm currently looking to fix is (was) running an Athlon XP3200+ so
is still reasonably useful, I was expecting to get a few more years out of
it. The boards I repaired before using different spec caps were less
valuable so I wasn't so worried if it didn't work. However, I've been told
in a local newgroup that, often, caps on a mobo are specced +/- 50 to 100%,
that they are 'smoothing' caps. (They are right next to the CPU and the
first symptoms was unstable CPU core voltage).

My question to the collective here is: Do you folks think it would be
relatively safe to use 2,200 uF caps in this motherboard? It's worth quite a
bit more than the others I fixed and I can't afford to make a mistake with
it.

Kind regards, and thanks in advance,
--
Shaun.

 

[Homer J Simpson]

"stanley" <stanley4@gmail.com> wrote in message
news:1158285304.817214.208320@d34g2000cwd.googlegroups.com...

~misfit~ wrote:
... Yes, he did. So what?

 

[JW]

On Fri, 15 Sep 2006 03:38:38 GMT "Homer J Simpson" <nobody@nowhere.com>
wrote in Message id: <2fpOg.10105$cz3.616@edtnps82>:

"stanley" <stanley4@gmail.com> wrote in message
news:1158285304.817214.208320@d34g2000cwd.googlegroups.com...

~misfit~ wrote:
... Yes, he did. So what?

*coughgooglecough*

 

[Dr.V]

Hi Shaun,

Have you given consideration to moving to the USA? You seem like a very
employable person who could carve out a lucrative career here.

Dr.Vido


"stanley" <stanley4@gmail.com> wrote in message
news:1158285304.817214.208320@d34g2000cwd.googlegroups.com...

~misfit~ wrote:
Hi folks, new poster, electronically challenged....

I hope you will be kind enough to help me, I face the following problem:

I have a motherboard in one of my PCs that has gone all flakey. It has
bad
cap syndrome. The low ESR electrolytic aluminium can caps are bulging and
leaking. I know that this problem was rife around 2000/2001 but thought
it
fixed by the time I bought this board, 2003. Sadly not true. The board
itself has been, up until the caps failed, an excellent, stable and very
useful bit of kit.

I have replaced capacitors on motherboards before with success so am not
worried about that side of things. My problem lies in the fact that I
live
in New Zealand. It seems that it's just about impossible to get a handful
of
caps the same specs as the ones on the board anywhere. I've found
suppliers
in the US but not any who will ship *outside* of the US. As I assemble
computers for a hobby and used this same model mobo in a few different
builds for friends I'm expecting to see others with the same problem soon
too.

Ok, so the main caps I need are low ESR, 3,300uF, 6.3v, 10mm can, 5mm
lead-spacing (25mm high but that's unimportant, there's room to go
higher)
electrolytic caps. I can't seem to source these anywhere in this
wonderful
country of mine. I've been told I can get them in 15mm diameter cans
which
is unacceptable as there is a row of five tightly satcked together. I've
tried for Nichcon and Rubycon first as I hear that these are good caps.
The
local Nichicon agent said they don't have them ex-stock but could order
them
in. A minimum order of 2K pieces and a 90-day turn-around! I need 5 for a
start, maybe another 20 later. You wouldn't believe how difficult a
seemingly easy thing like this has turned out to be.

So, to the advice I'd like: A year or two back, when I first struck
motherboards with bad caps a guy I met on a NZ newsgroup offered to get
me
some suitable caps as part of his next order (which lead me to assume he
was
"in the trade"). The caps needed for those three mobos I was hoping to
fix
were the ame spec, 3,300uF 6.2v.... Anyway, the caps he sent me were
2,200
10v and he said the should be fine. He couldn't get the exact match. I
went
ahead and fitted the caps and the motherboards worked fine. I still have
one
of them running the PC I use for a stereo/mp3 jukebox that runs 24/7.

The board I'm currently looking to fix is (was) running an Athlon XP3200+
so
is still reasonably useful, I was expecting to get a few more years out
of
it. The boards I repaired before using different spec caps were less
valuable so I wasn't so worried if it didn't work. However, I've been
told
in a local newgroup that, often, caps on a mobo are specced +/- 50 to
100%,
that they are 'smoothing' caps. (They are right next to the CPU and the
first symptoms was unstable CPU core voltage).

My question to the collective here is: Do you folks think it would be
relatively safe to use 2,200 uF caps in this motherboard? It's worth
quite a
bit more than the others I fixed and I can't afford to make a mistake
with
it.

Kind regards, and thanks in advance,
--
Shaun.

 

[Homer J Simpson]

"Dr.V" <asd965465@ahoo.com> wrote in message news:cKpTg.54$fI1.4@trndny04...

Have you given consideration to moving to the USA? You seem like a very
employable person who could carve out a lucrative career here.

There are so many Yanks who want to move to Kiwiland and so many Kiwis who
want to move to the USA there ought to be an exchange plan.