Re: Choosing the right replacement cap

Hi,

stj: Thanks - that's a clear and helpful pointer RE ESR can be lower, ripple must be higher.

budm: Thanks for the references. While I haven't read through all those docs, I found this particularly humorous in the Tantalum cap section of the CDE.com guide:
Strengths are temperature stability, volumetric efficiency and compatibility with all automated assembly systems.
Weaknesses are the limited voltage and capacitance ranges and a short-circuit failure mode accompanied by catching fire.

...

Re: Choosing the right replacement cap

Hi and thanks for the reply.

How do you find (or work out) the ESR spec for the KZG series caps? It's not listed on the datasheet.

Mouser electronics only have 6.3V 1500 uF Nichicon HM or HZs.

Am I better off just trying to find replacement Nippon Chemi-Con KZG's?

Hi,

Apologies for the n00b and probably repetitive question here. I figure I'd rego and post a question or two to make sure I'm going to get this right first time. I'm going to replace a couple of caps on an IBM server motherboard. They're not part of the VRM (from what I can guess) but I could be wrong.
One cap is bad, it has leaked brown stuff over the green PCB. The other cap ... well it's probably gonna go bad at some stage so might as well "upgrade" that too

[ATTACH]118669[/ATTACH]

I've identified the bad capacitor as a Nippon Chemi-Con...

Re: New Members - please post your introductions here

Hi from New Zealand,

I'm a member of the NZ vintage computer club. [url]http://www.classic-computers.org.nz/[/url]
I'm a daily user of PCs, and in my collection I have a few Acorn BBC Micro's and RISC machines. I think it's a shame to throw out an otherwise useful electronic device if it's just got a bad power supply (due to bad capacitors) that's easily repairable. I've limited but competent experience with a soldiering iron and figure I'll also give motherboards a go now too.

Great site, look...