Filter caps

DeadSpeaker · 9th June 2008, 04:53 PM

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, 06:10 PM

Yes, you can use both capacitors.

DeadSpeaker · 11th June 2008, 02:56 AM

Thanks they worked just fine.

AndrewT · 11th June 2008, 01:32 PM

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

DeadSpeaker · 11th June 2008, 04:49 PM

What would doubling or tripling the filter caps do?

AndrewT · 11th June 2008, 05:17 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.

9th June 2008, 04:53 PM	#1
DeadSpeaker diyAudio Member Join Date: Jul 2007	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

9th June 2008, 06:10 PM	#2
Stormrider diyAudio Member Join Date: Apr 2006 Location: Connecticut	Yes, you can use both capacitors. __________________ AJ

11th June 2008, 01:32 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	now look at doubling them up again to give +-16mF per channel, even tripling to +-24mF. __________________ regards Andrew T.

11th June 2008, 05:17 PM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	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. __________________ regards Andrew T.

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11th June 2008, 02:56 AM	#3
DeadSpeaker diyAudio Member Join Date: Jul 2007	Thanks they worked just fine.

11th June 2008, 04:49 PM	#5
DeadSpeaker diyAudio Member Join Date: Jul 2007	What would doubling or tripling the filter caps do?

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