DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 87 - diyAudio
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Old 6th November 2011, 10:30 PM   #861
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Quote:
Originally Posted by apoopoo999 View Post
I just looked at your bom again and I see you noted RFS are better then the KZ I am using right now. Should I use RFS (Silmic) or ROA (Cerafine)?
It's also a matter of taste but for this DAC I recommend Cerafines or, even better if you can find them, Blackgate FKs/PKs (not standard ones, Cerafines are better here)

You should also bypass the OPA827 rail to rail with a 10nF Wima FKP2.

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Yes you are correct, those are some texas instrument regulators I had. Right now I am still building the Salas shunt 12v regs. When those are complete I will report back.
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Old 8th November 2011, 01:27 AM   #862
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It's also a matter of taste but for this DAC I recommend Cerafines or, even better if you can find them, Blackgate FKs/PKs (not standard ones, Cerafines are better here)

You should also bypass the OPA827 rail to rail with a 10nF Wima FKP2.
Hey Dario you were right, the cerafines sound much better then the kz for opamp decoupling. Now the ak4395 is more open and there is much more detail in the mids.

I also added the 12v salas shunts and bypassed the opa827

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Old 8th November 2011, 01:37 AM   #863
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Hey Dario you were right, the cerafines sound much better then the kz for opamp decoupling.


Impressive work
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Old 8th November 2011, 03:49 AM   #864
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Originally Posted by apoopoo999 View Post
sound much better then the kz for opamp decoupling
KZ is good for whitegoods control boards. Not good for audio. IMO.
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Old 8th November 2011, 06:17 AM   #865
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Whitegoods boards????
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Old 8th November 2011, 06:19 AM   #866
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Whitegoods boards????
Washing machines, dish washers, microwave ovens etc
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Old 8th November 2011, 06:20 AM   #867
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Thanks;-)
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Old 8th November 2011, 07:46 AM   #868
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After the OPA 827 ,i tried the OPA1641 .....
Also very good ...better ..perhaps

The OPA 827,OPA1641 JFET input seem better than the bipolar AOP .
If you have some informations about the difference between the technologies
i am interested .


I also used a SALAS shunt Reg for the AOP 2x15v ,what is the value of the bypass capas ?

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Serge
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Old 8th November 2011, 12:17 PM   #869
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Serge,

Even if some opA1641 specs are worst than the 827, like GBP and slew-rate, price is more affordable.

And it gets better. There's a dual version for that chip, called opa1642, which should simplify assembly. Pity DIP8 are non-existent anymore.
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Old 8th November 2011, 01:11 PM   #870
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I also used a SALAS shunt Reg for the AOP 2x15v ,what is the value of the bypass capas ?

Thanks
Serge
bypass for the opa827 is 10nF (.01uf) Wima FKP2
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