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Old 19th September 2012, 05:26 PM   #541
tome is offline tome  Macedonia
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Hi
I cleaned the PCB from flux and remove U7 and R10, now it's Ok, I think that flux or some dirt make me troubles.
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Old 19th September 2012, 05:33 PM   #542
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At last somebody that proves me right

Some points as it seems you missed some info:

- C32 should be the other way around because an error was made. Please do this before using the DAC. It will sound better and the cap will last longer. So the - should be orientated where the + is printed on the PCB.

- Output caps of the regs should be tantalum 4.7 F (C19, C22, C26 and C29) as the regs don't like too low ESR of ceramic caps

- a tantalum 4.7 F tantalum for C8 is a bit better.

BTW nice build ! Nice soldering skills and, if I am not mistaking, even with lead free solder. Correct the stuff and you'll have the best DAC around Lake Ohrid !
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Last edited by jean-paul; 19th September 2012 at 05:50 PM.
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Old 19th September 2012, 06:00 PM   #543
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A+ build Tome!
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Old 19th September 2012, 06:58 PM   #544
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Very nice soldering skill Tome
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Old 19th September 2012, 07:54 PM   #545
tome is offline tome  Macedonia
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Thanks guys for good words about my build with special thanks to J-P for his suggestions and assistance.
I checked previous posts and it's true i missed the post with J-P explanation about C32, i'll fix this tomorow.
About tantalum, i like to build one board with ceramic and one with tanatalum caps and hear the diference.
Solder is multicore 0.5mm 60/40
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Old 19th September 2012, 08:00 PM   #546
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Promise to tell how it sounds.
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Old 19th September 2012, 10:04 PM   #547
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Nice build Tome.

I have a question about balanced version:



The schematic shows the data signal going through R9 and R10 on the second board.

Should R9 be populated or not on the second board?
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Old 20th September 2012, 05:33 AM   #548
pchw is offline pchw  United States
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Quote:
Originally Posted by syklab View Post
Yep,
Very good eye, that was an old photo, I have changed the polarity already but I have also been testing with a solen MKP in C8(1.5uf) and C32(22uf).
Did you mean C9 instead of C8?
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Old 20th September 2012, 05:57 AM   #549
syklab is offline syklab  Hong Kong
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Quote:
Originally Posted by pchw View Post
Did you mean C9 instead of C8?

Yes, typo, I meant C9.
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Old 20th September 2012, 12:22 PM   #550
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I cleaned the flux from pcb but still silence. I posted the voltage ratings earlier in this thread. Does anybody have any ideas?
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