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Old 5th October 2011, 01:54 PM   #11
AndrewR is offline AndrewR  United Kingdom
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Originally Posted by mctavish View Post
So is Andrew referring to the dynamic charge-discharge when the amp is in operation? Do the smaller caps really do this faster, and a better question is will this actually have audible difference in a class AB P-P amp?
Yes the dynamic charge and discharge when in operation. If you use a dropper resistor in the PSU, or if the resistance of the choke is significant enough, then the RC time constant may become noticable.

However, thinking about it, if you are only using CLC (and not CLCRC) then you might be able to get away with higher values of C. It's when you get to using CRC, or similar, when cap size becomes very critical.

At the end of the day it is worth experimenting with values, hearing if there is a difference.

Andrew
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Old 5th October 2011, 01:56 PM   #12
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A problem that can be is if you use caps with to high voltage rating they will go bad cause of never being fully charged.

20-30% over is a good rating (including startup peak).

Several smaller in parallel compared to one big for faster charge/discharge.
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Old 5th October 2011, 02:22 PM   #13
AJT is offline AJT  Philippines
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too much C? nah.....

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Old 5th October 2011, 03:01 PM   #14
AndrewR is offline AndrewR  United Kingdom
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They're in series not parallel :P

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Old 5th October 2011, 03:10 PM   #15
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When the mass of the caps is greater than the mass of the transformer(s).
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Old 5th October 2011, 06:39 PM   #16
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Too much C is simply when you spend more money on capacitors then what you could have spent on combinations of other parts to achieve the same ripple reduction for less money.
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Old 5th October 2011, 07:22 PM   #17
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Too much C is simply when you spend more money on capacitors then what you could have spent on combinations of other parts to achieve the same ripple reduction for less money.
The caps were the best price = free!! Now if only I can find a free pair of Lundahl OT'S I will dance a jig!!!
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Old 6th October 2011, 12:03 AM   #18
AJT is offline AJT  Philippines
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They're in series not parallel :P

Andrew
yup, this is a CRCRCRC filter bank.....
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Old 6th October 2011, 12:05 AM   #19
AJT is offline AJT  Philippines
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The caps were the best price = free!! Now if only I can find a free pair of Lundahl OT'S I will dance a jig!!!
same here, i did not pay for those caps, someone else did.....
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Old 12th May 2012, 07:50 PM   #20
john65b is offline john65b  United States
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I am in the same boat - 2200uf 450 caps in a CLC circuit, and SS rectifier. First cap small at 4.7uf, then a 1.5H, then the 2200uf. It s a Quicksilver 8417 clone with KT88's.
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