RAKK DAC MKII finished

[Irakli]

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]

and here is the analog stage

 

[ezkcdude]

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

 

[6h5c]

That must have set you back a few bucks, eh?

Are you being sarcastic ?

Ray

 

[DougL]

Irakli,

Great looking DAC. Good Job.

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

Thanks for sharing.

Doug

 

[ezkcdude]

Are you being sarcastic ?

Ray

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

 

[6h5c]

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]

Hi Guys,

Thaks for nice comments.

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?

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.