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Newbie: Aleph2 Capacitor Question
Newbie: Aleph2 Capacitor Question
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Old 4th June 2002, 11:40 PM   #1
acliao is offline acliao
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Default Newbie: Aleph2 Capacitor Question

I am planning to use 20 pieces of 4,700uf 50v capacitors per channel for my Aleph 2 Power Supply with 35V-0-35V, 1K watt transformer. The voltage after regulation will be close to 45v. Is 50v rating on capactor running @ 45v too close?

I did searches and read many informative postings but still have this question. 45V will be about 90% of the rated 50V. Is that going to shorten the capacitor life or the 50V rating capacitor will be fine? Thank you for your help.
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Old 5th June 2002, 12:17 AM   #2
AudioFreak is offline AudioFreak  Australia
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Newbie: Aleph2 Capacitor Question
I would tend to use higher voltage capacitors because the mains voltage fluctuates around the nominal value. If or rather when the mains goes high, you could find yourself in trouble. ~60V - 75V caps would be more to my liking.
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Old 5th June 2002, 01:17 AM   #3
Peter Daniel is offline Peter Daniel  Canada
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If you already have those caps, use them, if not, try to find higher voltage ones. I used caps in amps with rails the same as the rating on a cap and after 10 years they still work, althoughd I would never recommend it.
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Old 5th June 2002, 02:31 AM   #4
tiroth is offline tiroth  United States
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I have an amp that survived a couple of years in a similar situation, 50V rails at idle with 50V caps. That supply is being rebuilt now though because it scares me too much.
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