RAKK DAC MKII finished

Irakli · 8th August 2007, 11:13 PM

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.

Irakli · 8th August 2007, 11:14 PM

and here is the analog stage

ezkcdude · 10th August 2007, 01:36 AM

That must have set you back a few bucks, eh? Nice job, though.

6h5c · 11th August 2007, 08:26 PM

Quote:

Originally posted by ezkcdude
That must have set you back a few bucks, eh?

Are you being sarcastic

?

Ray

DougL · 11th August 2007, 11:18 PM

Irakli,

Great looking DAC. Good Job.

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

Thanks for sharing.

Doug

ezkcdude · 12th August 2007, 01:42 AM

Quote:

Originally posted by 6h5c

Are you being sarcastic ?

Ray

Well, not really in America. That idiom means: "You must have spent a fortune!"

6h5c · 12th August 2007, 07:00 AM

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

Irakli · 12th August 2007, 09:27 AM

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.

10th August 2007, 01:36 AM	#3
ezkcdude diyAudio Member Join Date: Dec 2005 Location: Atlanta	That must have set you back a few bucks, eh? Nice job, though. __________________ He's not hi-fi, he's my stereo. ShinyMetal

11th August 2007, 11:18 PM	#5
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	Irakli, Great looking DAC. Good Job. You also did a very interesting output stage. Is that your own design? Thanks for sharing. Doug __________________ Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus

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