Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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Re: Experimenting with Power Supply Filter Caps.

195.184.43.74

Posted by LGJ on July 9, 1999 at 02:56:28

In Reply to: Re: Experimenting with Power Supply Filter Caps. posted by Clayton Oxendine on July 8, 1999 at 21:38:41:

I'm am also not an EE but if you reed the specification for most capacitors there ESR is not optimal at low frequencies. Therefore it would be better to use smaller values and plenty of capacitors in parallel. Please notice the total capacitance should not be too much higher than the original because they would work as a shortcut when empty and the PS might only be optimised (cost optimised) to the original capacitance. If looking at the characteristic of a battery it is much more willing to deliver high currents at low frequencies. I have heard a solution with two auto accumulators (sealed versions!!!(+/-12V)) and two small capacitors (1500uF) and this were one of the best modifications I have heard. You have to be careful with auto accumulators. They would not live long if they are completely discharged and it would not be an audiophile experience to listen when charging. Also the voltages should match the equipment. If possible try with some smaller batteries for the digital and analogue parts just to see (listen) if it is worth it. I have not tried this with my CDP yet so what kind of complications that might occure I have no idea about. If you don´t feel confident with this then better dont try it (batteries contains lots of current!!!!!)(and acid in some cases).
Regards Lasse

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