LM3875 Build Advice

DreadPirate · 21st January 2011, 12:29 AM

I have a non inverting stereo kit with a psu board for each side. My transformer is a single 25-0-25 330VA with dual secondaries. I think I read somewhere that I would be better off going with a single psu board. My psu boards have allowance for seperate rectification (3 pin shottkeys for each side), but would share the caps. If I did this, I would use 4 x 2000uf Panasonic FCs. Is this optimal, or should I use both boards and place 2 x 2000uf on each?

DreadPirate · 21st January 2011, 01:15 AM

I would feed the two amp boards from this single board.

Peter Daniel · 21st January 2011, 01:45 AM

Yes, that would work fine. I wrote about it here: Commercial Gainclone kit- building instructions

21st January 2011, 12:29 AM	#1
DreadPirate diyAudio Member Join Date: Jan 2006 Location: Northern Virginia, USA	LM3875 Build Advice I have a non inverting stereo kit with a psu board for each side. My transformer is a single 25-0-25 330VA with dual secondaries. I think I read somewhere that I would be better off going with a single psu board. My psu boards have allowance for seperate rectification (3 pin shottkeys for each side), but would share the caps. If I did this, I would use 4 x 2000uf Panasonic FCs. Is this optimal, or should I use both boards and place 2 x 2000uf on each?

21st January 2011, 01:45 AM	#3
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Yes, that would work fine. I wrote about it here: Commercial Gainclone kit- building instructions __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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