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-   -   My first lm3875 (http://www.diyaudio.com/forums/audio-sector/225021-my-first-lm3875.html)

scrazy 5th December 2012 07:18 AM

My first lm3875
 
1 Attachment(s)
The sound is very good!
The dc offset 50mv,40mv seems too high?

chipzahoy 5th December 2012 09:28 AM

Nice build, I like those chassis.

Not at all. Those values are well within the safe range.

Edit: Do you plan on picking up the "magical" resistors as recommended?

scrazy 5th December 2012 10:10 AM

2 Attachment(s)
more pictures...
This is my test set, I'll testing Cin when my caps received , and rewire the connection , add a copper plate at the bottom.
I use Cin because : http://www.rexdiy.com/smf2/index.php?topic=432.0

The toroid is from Tamela 18v 225va.
There're some strange thing, when lm3875 turn off,I turn on the preamp, there're some loud noise from the speaker, after about 6 secs ,then dead silent.
So I turn on lm3875, and all works fine.
no idea...

scrazy 5th December 2012 05:58 PM

chipzahoy:
What do you mean the "magical" resistors ?

chipzahoy 5th December 2012 06:16 PM

The TX2575, use them@Rf and R3!


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