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Old 7th September 2003, 09:37 AM   #1
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Default Audio Note DAC 3 mods help!

Hello all, I'm wondering if anyone has got ideas about where to start and what to change on this pre 98 DAC 3?
All advice gratefully received
Cheers Dave
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Old 7th September 2003, 05:12 PM   #2
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Does it have the YM3623->DF1700->2xPCM63 chipset and to what extent do want to modify it ?

ray
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Old 7th September 2003, 09:01 PM   #3
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Hello Ray, thanks for the reply, yes it has the ym3623b, df1700p and pcm63p chipset, well i'm a begineer at this althuogh the pcb layout is straight forward and i can use a soldering iron, so swapping bits is no probelm. i just don't really know where to start or how good the dac can get, so maybe some minor tweaks for now, it seems this is a dacdig rev 2 from 1993 with sovtec 6922 valves and jensen paper caps,
thanks once again,
dave
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Old 8th September 2003, 09:30 PM   #4
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I have one of things in pieces at the moment and I am not too sure what to do with it. I tried the no oversampling route but I was not too impressed though with hindsight there is one thing I would now do differently. On the analogue side I always felt the relatively high output impedance and limited output current was holding the dac back but the limited space has stopped me doing anything about it. Sorry to be of little help but I have only seen references to mods for the newer non os audionote dacs. The only other reference to the oversampling audionotes I have seen is here;

cd/dac mod..picture!!

You might try posting in the digital section of the audioasylum www.audioasylum.com where Mr Audionote, Peter Qvortrup is to be found.

ray.
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Old 8th September 2003, 10:19 PM   #5
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Default Tweaks

The NPC SM5813 Filter-chip is supposed to sound better than the DF1700, and is a direct replacement...

Arne K
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Old 9th September 2003, 12:31 PM   #6
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The SM5813 is the DF1700 and both have long been discontinued.

ray.
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Old 9th September 2003, 01:58 PM   #7
Cobra2 is offline Cobra2  Norway
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Default discontinued......

-But not un-obtainable....

A forum member has sold me a couple:

FS: CS8412 and others

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Old 9th September 2003, 04:03 PM   #8
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Fitting the SM5847 using a daughter board would be far better option.

ray.
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Old 9th September 2003, 05:30 PM   #9
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Quote:
Originally posted by rfbrw
Fitting the SM5847 using a daughter board would be far better option.

ray.

Probably yes, I have such board repling the 5842

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Old 9th September 2003, 05:33 PM   #10
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Default Re: Audio Note DAC 3 mods help!

Quote:
Originally posted by candle1966
Hello all, I'm wondering if anyone has got ideas about where to start and what to change on this pre 98 DAC 3?
All advice gratefully received
Cheers Dave
Hi

May I humbly suggest to add my DAC clock reclocking board ? It lowers the jitter of the regenerated clock hence will bring resolution, for sure.....

regards
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