How to modify Brian's LM3875 Rev C. supply board for use with CT? - diyAudio
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Old 26th April 2006, 02:45 AM   #1
maurycy is offline maurycy  United States
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Join Date: Dec 2005
Location: NJ
Default How to modify Brian's LM3875 Rev C. supply board for use with CT?


I have 42V CT transformer giving me 21V-0-21V. I would like to use it with Brian's LM3875 Rev. C power supply board. According to the users guide for the kit, I should only use diodes D1, D3, D6, D8. Unfortunately the placement of those diodes is different on the Rev. C board.

Could anyone let me know if the instructions for Rev A (or B) still apply to the new revision?

Where do the wires from transformer go on the board? I have only three wires (21V-0-21V).

Attached is the board layout.

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File Type: jpg power supply board.jpg (26.7 KB, 150 views)
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Old 26th April 2006, 06:54 AM   #2
diyAudio Member
Join Date: Feb 2006
Location: ca
I also had the same question. Take a look at this

Need Help With a True center tap Transformer

Good luck
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