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Which would be a better replacement cap?

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Which would be a better replacement cap?

Postby Pentium » January 13th, 2014, 4:42 pm

I'm recapping a Macron, and it uses exclusively GP Fuhjyyu TN caps. One cap is 100µF 35V 6.3mm x 11mm. The replacement caps I have are Panasonic FC 100µF 35V 8mm x 11.5mm, and Rubycon ZLH 68µF 35V 6.3mm x 11mm. Since they're replacing a GP cap, either ones ripple far exceeds the Fuhjyyu TN. But, the Panasonic is much bigger. The Ruby cap is he exact size but I'm not sure if the smaller µF will make a difference. The cap is connected to the primary side of the 5VSB transformer. Appreciate any input!
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Re: Which would be a better replacement cap?

Postby LongRunner » January 13th, 2014, 5:02 pm

Neither of the two designs I'm familiar with has such a cap. But if it's for what I think it's for, I doubt the whole 100µF would be needed. Can you show us the interior of the unit in question???
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Re: Which would be a better replacement cap?

Postby Pentium » January 13th, 2014, 5:28 pm

It is indeed a newer Macron design. Unfortunately my phone is broken so I can't take a new picture but here's the original. Sorry, the picture isn't very large:
100uf35v.jpg
100uf35v.jpg (396.18 KiB) Viewed 23821 times
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Re: Which would be a better replacement cap?

Postby Pentium » January 13th, 2014, 6:10 pm

I guess one of my main questions is, even if it's not a filtering cap, isn't ripple current more important than capacitance?
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Re: Which would be a better replacement cap?

Postby LongRunner » January 13th, 2014, 6:19 pm

It probably is a filtering cap, for the power to the PWM controller.
Information is far more fragile than the HDDs it's stored on. Being an afterthought is no excuse for a bad product.

My PC: Core i3 4130 on GA‑H87M‑D3H with GT640 OC 2GiB and 2 * 8GiB Kingston HyperX 1600MHz, Kingston SA400S37120G and WD3003FZEX‑00Z4SA0, Pioneer BDR‑209DBKS and Optiarc AD‑7200S, Seasonic G‑360, Chenbro PC31031, Linux Mint Cinnamon 20.3.
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Re: Which would be a better replacement cap?

Postby Pentium » January 13th, 2014, 6:26 pm

So, what do you suggest?
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Re: Which would be a better replacement cap?

Postby c_hegge » January 13th, 2014, 6:30 pm

If you can squeeze the Panny in, use it, otherwise the Ruby will have to do.
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Re: Which would be a better replacement cap?

Postby Pentium » January 13th, 2014, 6:34 pm

The Panny fit, so it's in there. I assume the ESR won't make a difference. So, now it's all recapped :)

Macron used a 4700µF 16V Fuhjyyu TN on the second 12V rail. So I assume the 4700µF 16V Panny FR will keep the ripple nice and clean :)

For a Macron, the soldering is pretty disappointing. Big blobs galore, but nice and short leads
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Re: Which would be a better replacement cap?

Postby LongRunner » January 13th, 2014, 6:45 pm

In the original MPT series they had a tendency to use too little solder on the output wires, which caused their solder joints to fracture...
Information is far more fragile than the HDDs it's stored on. Being an afterthought is no excuse for a bad product.

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Re: Which would be a better replacement cap?

Postby c_hegge » January 13th, 2014, 7:27 pm

The soldering quality on my MPT-4012 wasn't exactly Delta or WinTact quality either, and I did touch a few things up. It was better than CWT's soldering, though.

What I do really like about the 4012 is that it has PCB space and silkscreening for 12.5mm caps on most of the outputs.
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