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hisense  
#1 Posted : Tuesday, January 4, 2011 10:50:22 AM(UTC)
hisense

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Looking for some guidance on a new dual mono Buff2 build; i plan on using it as a DAC / PRE with upcoming AC2 or Arduino based controller (thanks to GLT). Due to space constraints in the case i have chosen for the dual mono setup i am considering building a seperate power supply unit.

I plan on using 4 R cores for 2 x PlacidBP, 1 x LCDPS & 1 Placid. Rather than just mounting the transformers in a seperate enclosure which at best would possibly reduce EMI in the DAC case i thought about making DC supply with seperate rectifier boards - http://sjostromaudio.com...ra-fast-rectifier-bridge - and reservoir capacitance in there - similar to the old Naim audio HICAP.

Do you think its worth trying or not worth the effort? Or simplify with a packaged rectifier?

Any input appreciated,

Thanks,

Luke

Brian Donegan  
#2 Posted : Tuesday, January 4, 2011 11:15:37 AM(UTC)
Brian Donegan

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You are best off keeping the DC lines short, both for noise as well as improving the ability of the Placid to regulate.

There is no benefit to using separate rectifiers.

If you have to use two chassis I think you you be best off, if you can fit it, putting the power supplies in the main unit and the transformers in a separate chassis.
hisense  
#3 Posted : Tuesday, January 4, 2011 12:05:30 PM(UTC)
hisense

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Thanks Brian,

Is there any potential disadvantage to the transformers being located in a second enclosure with AC interconnect - interconnect <0.5M? I could look at a larger main case to include everything and shield the transformer area if yes..
Brian Donegan  
#4 Posted : Tuesday, January 4, 2011 12:08:44 PM(UTC)
Brian Donegan

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Just more wiring to do. You probably won't need to shield the transformers if you can fit them in the main case.
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