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-   -   Filter caps (http://www.diyaudio.com/forums/solid-state/124550-filter-caps.html)

DeadSpeaker 9th June 2008 03:53 PM

Filter caps
 
Hi I'm building the Project 27 from ESP. I'm trying to build the power supply right now as described here http://sound.westhost.com/psu-wiring.htm

I had two 4700uf caps and I think that would be enough, but I also have two 3300uf caps. Can I put a 4700 and 3300 in parallel on each side? Or will that mess with the DC ripple? Thanks a lot
-Josh

Stormrider 9th June 2008 05:10 PM

Yes, you can use both capacitors.

DeadSpeaker 11th June 2008 01:56 AM

Thanks they worked just fine.

AndrewT 11th June 2008 12:32 PM

now look at doubling them up again to give +-16mF per channel, even tripling to +-24mF.

DeadSpeaker 11th June 2008 03:49 PM

What would doubling or tripling the filter caps do?

AndrewT 11th June 2008 04:17 PM

increase the charging currents through the rectifiers in return for lower ripple and lower impedance from the PSU.
But, it forces you to adopt strict separation of PSU charging circuit from the relatively clean Audio Ground circuits.


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