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Old 8th August 2007, 11:13 PM   #1
Irakli is offline Irakli  United States
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Default RAKK DAC MKII finished

Hi All.

Finally finished my RAKK DAC MKII project this weekend. It sounds really good so far. Haven't done much research so far why it sounds so good, just enjoying it.

Picture is attached.
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Old 8th August 2007, 11:14 PM   #2
Irakli is offline Irakli  United States
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and here is the analog stage

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Old 10th August 2007, 01:36 AM   #3
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That must have set you back a few bucks, eh? Nice job, though.
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Old 11th August 2007, 08:26 PM   #4
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by ezkcdude
That must have set you back a few bucks, eh?
Are you being sarcastic ?

Ray
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Old 11th August 2007, 11:18 PM   #5
DougL is offline DougL  United States
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Irakli,

Great looking DAC. Good Job.

You also did a very interesting output stage.
Is that your own design?

Thanks for sharing.

Doug
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Old 12th August 2007, 01:42 AM   #6
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Quote:
Originally posted by 6h5c


Are you being sarcastic ?

Ray

Well, not really in America. That idiom means: "You must have spent a fortune!"
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Old 12th August 2007, 07:00 AM   #7
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by ezkcdude
Well, not really in America. That idiom means: "You must have spent a fortune!"
Yeah, I got that part. I was just kidding, considering the fact that the EzDAC probably costs a fraction of it, and the fact that you designed it. Never mind, maybe my humour is a bit far fetched .

Ray
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Old 12th August 2007, 09:27 AM   #8
Irakli is offline Irakli  United States
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Hi Guys,

Thaks for nice comments.

Quote:
That must have set you back a few bucks, eh? Nice job, though.
You are right, it is not an inexpensive project. But hey, what project involving tube gear is cheap?

Quote:
You also did a very interesting output stage. Is that your own design?
As a prototype I used Linn Olson's Raven Preamp. Not current MkII, but a previous version. I built Raven couple years ago and was (and still am) very happy with it. The topology is similar, but components are different. Also Davenport published very similar design in AudioExpress a year ago or so.

What I did though is an antialiasing filter. I looked at the DAC output on the scope and got scared with all this HF riding on the sine wave.

Filter is 4th order bessel with -6db at 52Khz. It is -1 db down at 20Khz, but this doesn't bother me much.
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