DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 182 - diyAudio
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Old 29th May 2012, 09:06 AM   #1811
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Quote:
Originally Posted by apoo View Post
Ive lost my orientation in this huge topic.. Can somebody tell me where i can find the post with the link with the BOM
Hi apoo,

you can find my upgrade BOM, together with other relevant files, here.
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Old 29th May 2012, 09:13 AM   #1812
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Quote:
Originally Posted by nphil View Post
I just used the 0.22uF Wima MKS2s instead of the orange Chinese 0.1uF caps, on either side of the op-amp. The logic for using 0.22uF MKS2s was as following...
Those 'Chinese' caps are actually Korean ones made by Pilkor (ex Philips Korea) and they're not so bad.

BTW I recommend good quality electrolythics (47uF) in those positions.
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Old 29th May 2012, 10:37 AM   #1813
50AE is offline 50AE  Bulgaria
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News from mee! I've almost finished the external power supply! Here are the extras

-Separate heater transformer
-Much better grounding, center tap for the heaters, beter cable paths, twisting
-Attenuator for the DAC (not done yet)
-New output caps (RIFA PME271M)

There is more to be done on the outside, it's just a matter of money and time


Pic 1

Pic 2

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Pic 4

Pic 5

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Pic 8

Last edited by 50AE; 29th May 2012 at 10:45 AM.
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Old 29th May 2012, 03:23 PM   #1814
atupi is offline atupi  Romania
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[QUOTE=bcmbob;3013882]Attachment 280903

Attachment 280904

Attachment 280905

No, I'm not that good. Shown after clean and polish.
Attachment 280906

Bob, i see one elcap close to the buffer opamp is damaged, top part is roundish.
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Old 29th May 2012, 05:04 PM   #1815
bcmbob is offline bcmbob  United States
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atupi - Good Eye. The DAC is working great but I'll replace it (probablly both) on my next to-do list. I used all the parts from a build I messed up on a new PCB so I feel lucky it's working at all. I use double sided carpet tape for sorting parts and will avoid placing them upside down in the future. Could have been the cause.

20120423_171649 (1).jpg

Only thing I couldn't salvage were the LEDs. Popped in some Radio Shack generics.

BTW, Should get this package today. Bought it to compare the WM8741 to the AK4396
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Last edited by bcmbob; 29th May 2012 at 05:12 PM.
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Old 29th May 2012, 07:10 PM   #1816
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does any one have a good and simple circuit for the 3.3 and 5v rails? if Dario had something on mind?
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Old 29th May 2012, 08:03 PM   #1817
fulvio is offline fulvio  Italy
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Nosian, I've just finished a power supply with four TL431 shunt regulators (+12V, -12V, +3.3V, +5V); it works.
The +20VA, -20VA, +20VA2, +12VD, -12VD come from a separate PSU, with two separate transformers and big filter capacitors.

Fulvio
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Old 29th May 2012, 08:15 PM   #1818
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thanx you nice Italian. I loved the Nina Zilli's performance in eurovision on Saturday. cheers.
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Old 29th May 2012, 08:34 PM   #1819
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I'm using a couple of super teddy regs for 3.3v + 5v...

TeddyPardo
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Old 29th May 2012, 08:51 PM   #1820
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thanx Merlin i wish i could robb a bank!
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