Re: KZG replacements - are there any?
Ahh that explains it.
I'm guessing the manufacturers will move to focusing on Polymers since they offer way better ESR values than electrolytics.
It's just a shame that we seem to be at the point where the cheap electrolytics have been discontinued but the polys are still fairly expensive....
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Re: KZG replacements - are there any?
Thanks. I did check this however the ripple is only rated at 1500 mA/r.m.s./105°C, 100kHz whereas the original KZGs were 1870. Mind you it's possible the KZGs are way overspecced for this board but I can't be sure. Also the impedance is 0.007 higher in the ZLH series.
Yes this is a very good point - one which I should've mentioned in my post above. I have taken measurements and I think I can get away with 20mm high caps which will stick up over the slots. The only reason I say that is that this motherboard...Last edited by eponymous; 03-15-2014, 05:09 AM.
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Re: 10mm caps into 8mm holes - any tips?
So these would be located near the CPU - the VRM section.
Cheers....
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10mm caps into 8mm holes - any tips?
So it seems the standard pitch or lead-spacing on 10mm caps is 5mm and on 8mm caps it's 3.5mm.
I've just tried soldering a 10mm cap into an 8mm hole on my practice motherboard and it seemed to fit ok with the legs bending ever so slightly.
What concerns me though is that the cap will never sit totally flush with the board which means the leads will always be a bit longer than a like for like replacement.
Will the effects of the series inductance from the leads cause major issues here?
I've seen [URL="https://www.badcaps.net/forum/showthread.php?t=104"]Topcat...
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Re: KZG replacements - are there any?
So after having another look at my board I've decided to stick with wet Electrolytics (they're dirt cheap compared to Polymer caps) and just go up in sizes to get the Ripple/ESR values I need.
Inspired by [URL="https://www.badcaps.net/forum/showthread.php?t=104"]Topcat's thread[/URL] I'm going to use 10mm caps and just hope the lead spacing of 5mm into 3.5mm spaced holes won't cause too much of an issue with series inductance.
I drew up a table after pouring through datasheets and contrasting against commonly...Last edited by eponymous; 03-13-2014, 11:36 AM.
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Re: KZG replacements - are there any?
>> I'm trusting the board desginers with their choice of the not-very-low-ESR Rubycon YXAs and so wasn't going to bother replacing them.
There are also Rubycon MBZs near the VRM as well so they should be ok.
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Re: KZG replacements - are there any?
Thanks for the replies all.
Yeah so the board consists of Rubycon YXAs, Panasonic FRs and (the ones of interest) Nichicon KZGs.
Of the KZGs, two are 470uF/16v (near the PCI slots) and eight are 1500uF / 6.3v at the VRM for the CPU.
I was only going to bother replacing the KZGs. I'm trusting the board desginers with their choice of the not-very-low-ESR Rubycon YXAs and so wasn't going to bother replacing them. The Panasonic FRs I presume are ok too.
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KZG replacements - are there any?
Hi all,
I'm new to re-capping boards and this forum and have an ASUS-A8N-SLI which has about eight KGZs on it.
After looking at the [URL="http://media.digikey.com/PDF/Data%20Sheets/United%20Chemi-Con%20PDFs/KZG%20Series_WEB.pdf"]KGZ datasheet[/URL] I see the ripple and impedance for the can sizes on the boards are (6.3v-35v):
8x20: Imp. 0.021 / Ripple 1870
8x11.5: Imp. 0.036 / Ripple 1140
Searching on here, Digikey/Mouser/Farnell I can't find any capacitiors that even come close to those values. The ZL(H,G,J) are worse...
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Re: ESR not listed in Rubycon datasheet?
Hmm, but isn't impedance Z(ω) = R + j X(ω) ?
Ah do you mean that R is effecitvely the ESR and is lumped together with the reactance? So we want the impedance to be low since it is related to R?
Also, what kind of upper threshold do we have on impedance for replacing motherboard caps?...
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ESR not listed in Rubycon datasheet?
Hi all,
Qucik question regarding ESR:
Why doesn't it seem to be listed at:
[URL="http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_ZL.pdf"]http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_ZL.pdf[/URL] ?
Am I missing something?
Thanks.Hi all,
Qucik question regarding ESR:
Why doesn't it seem to be listed at:
[URL="http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_ZL.pdf"]http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_ZL.pdf[/URL]
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