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scrazy 5th December 2012 06:18 AM

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

chipzahoy 5th December 2012 08:28 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 09:10 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 :

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 04:58 PM

What do you mean the "magical" resistors ?

chipzahoy 5th December 2012 05:16 PM

The TX2575, use them@Rf and R3!

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