CS4397 dac

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Originally Posted by alb

Mace.
If you have ordered Vishay/ERO MKP1837 0.1uf, then make sure you put one in place of C9 (input). These were the best caps- in my opinion- for the job. I tested quite a few.
I found this to be the greatest single improvement, while i was upgrading.

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Yup, those are the ones, the box-types.

Did you replace or bypass C9?

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Its tempting to replace and bypass loads of caps all at the same time. But not so easy to go back if you don't like the effect.

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Yeah it's true, I tried the Wima's on a bunch of those SMD caps (0604?), but I did not like the effect.

I have a 0,5mm tip on my iron and a steady hand, so removal was easy and non-destructive.

I'm expecting the caps by the end of the week, I'll post here about the effects.

Mace.

I left C9 in place while i was testing different bypass caps. This meant i had something to use as a reference. The best sounding bypass cap also turned out to be the best replacement for C9, which is no longer there.
Using the wrong cap here can really screw up the sound. Regardless of how many bypass caps are fitted further down the line.
If you find something that you think sounds better than the Vishay, let me know.

one very big upgrade would be using audio transformer as a output stage
more Info at diyaudio
Leo have you tried It

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Originally Posted by samoloko

one very big upgrade would be using audio transformer as a output stage
more Info at diyaudio
Leo have you tried It

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Hi,

No not yet, I've been putting it off tbh for a while but it seems those who have tried them did like the results so its something I'll have to try out later to satisfy curiousity :)

A list of mods have been added to page1 to make it easier (list kindly done by member Raptor) , any further mods will probably be added there too

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Originally Posted by leo

A list of mods have been added to page1 to make it easier (list kindly done by member Raptor) , any further mods will probably be added there too

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That's awesome!

I have a quick question. It says R28 and R29 should be empty, but mine are populated, should I remove them?

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Originally Posted by mace

That's awesome!

I have a quick question. It says R28 and R29 should be empty, but mine are populated, should I remove them?

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Anyone? :please:

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Originally Posted by mace

Anyone? :please:

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I think those resistors go from output to ground (going from memory), if you use coupling caps after those I'd just remove them

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Originally Posted by leo

I think those resistors go from output to ground (going from memory), if you use coupling caps after those I'd just remove them

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Ok thanks.

I have K42-Y2 1uF PIO's in there, but no resistors in series with the output.
Then again I'm using a 4562 and not that AD you're using. :)

hi guys,

how 's everybody doing?
i was trying to mod the the dac with some cap upgrade but have accidentally lifted a pad....being a relative newbie! the lifted pad is c19 ( positive side of the cap)which is before the 3.3v regulator.

1. where do i tap the positive side of the cap which is connected to the +5v supply? i tried connecting it straight to the +5v supply but the regulator gets too hot and the led does not light up.

please help! thank you

nika