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Capacitor Question
Capacitor Question
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Old 3rd December 2017, 04:56 AM   #1
Jrp27 is offline Jrp27  India
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Default Capacitor Question

One of the PCBs I purchased needs 4 10,000uf 100v caps.
.Now the problem is that I have a bunch of 4700uf 50v caps in spare which I can use.

Would it be okay if I can use the 4700uf caps instead of getting new 10000 if caps?

The amp is Naim Nap 200

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Old 3rd December 2017, 07:23 AM   #2
scottjoplin is offline scottjoplin  Wales
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If the supply voltage is as shown, then yes you can, you will have slightly more ripple on the DC rails but it probably won't be audible
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Old 3rd December 2017, 02:45 PM   #3
indianajo is offline indianajo  United States
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If you parallel two 4700 to make one 9400 uf, you should hear no difference.
I make cap assemblies out of smaller caps; two pieces of polycarbonate plastic with holes drilled, the caps, some 18 ga wire, and 2" #6 screws & nuts. I then screw the whole assembly to the main board to keep it from flopping when I carry it around. I had room in my case, you have to evaluate your own space requirement.
3 mm screws & nuts in your part of the world. Use elastic stop nuts so they don't come unscrewed.
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Old 3rd December 2017, 05:35 PM   #4
Jrp27 is offline Jrp27  India
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Unfortunately I don't have the luxury of space. I have space for a single capacitor. Also the supply is 28-0-28. So after rectification the voltage will rise to 63v.

I need a 80v cap. Right? Or am I missing something?
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Old 3rd December 2017, 06:01 PM   #5
scottjoplin is offline scottjoplin  Wales
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You'll have about 40V DC on each rail
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