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Old 6th September 2010, 02:37 PM   #1
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Default Newbie question capacitors

In a typical Japanese or wherever integrated or power amp there are usually two big caps or cans that stick up above the rest. 8200 uf 50v or 63v seem to be typical, my question is where are there articles about just these caps, what to replace them with, what brands are good, lousy and otherwise?
I don't even know what to call them. Power caps?

Thanks, Tom
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Old 6th September 2010, 03:08 PM   #2
CBS240 is offline CBS240  United States
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Power supply filter caps. They filter the bridge rectifier output to create DC. I would generally replace them with the same value as opposed to increasing value in a Chip amp circuit because sometimes the designer counts on voltage depleation to limit SOA to prevent failue. If the amp is older, the same value modern cap may be physically smaller.
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Old 6th September 2010, 03:17 PM   #3
AndrewT is offline AndrewT  Scotland
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go to ESP.
he has whole articles on assembling and designing Power Supply Units (PSU).
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Old 6th September 2010, 05:05 PM   #4
DF96 is offline DF96  England
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Strictly speaking, many of them are reservoir capacitors not filter capacitors.

If you don't know what they do, why do you want to change them? What is it about your amp that you want to improve?
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Old 6th September 2010, 05:50 PM   #5
ferynov is offline ferynov  Indonesia
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replace with japanese or better german caps (mundorf,siemens)uk,us caps..
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