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-   -   From the LM1875 questions and the ground discussion (http://www.diyaudio.com/forums/chip-amps/118174-lm1875-questions-ground-discussion.html)

MJS 25th February 2008 08:11 PM

From the LM1875 questions and the ground discussion
 
2 Attachment(s)
This is the schematic

The blue parts are usually optional parts

MJS 25th February 2008 08:20 PM

2 Attachment(s)
And this are the PCBīs

The same PCB can be used with all the componentes or only the most usual and is calculated for the size of some different components but of course the same value

There are only a variation in placing Rg

With this I understand the grounds returns, itīs greatly based in Elektorīs schematic

MJS 25th February 2008 08:30 PM

2 Attachment(s)
The voltage rails are very dimensionated, at all LM3886 can accept 11A and this is not a joke

Same that my LM1875 design there is very clean, no noise, no pops, nothing (well it sound, but good)

My power supply is a 24-0-24V, 160 vA and 3,3 Amperes and two 22000uF caps for each channel

MJS 25th February 2008 08:38 PM

I forgott to say that the power suply caps in the PCBīs have 100uF + 10 uF values

MJS 25th February 2008 08:43 PM

And the LM3886

:headbash: :headbash: :headbash: :headbash: :headbash: :headbash:


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