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Old 6th July 2008, 04:32 AM   #1
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Default Pass D1 I/V for Sabre DAC

I know that there are a lot of schematics on diyaudio for the D1 but I just want a simple one. I have searched and found JFET ones and modified ones, I want the original one. I am looking for a schematic for the D1 I/V stage and SE conversion without the DAC or supporting stuff. I do not know 100% which circuits are for the volume control, I/V, receiver, etc. so a simplified schematic or link to one would be a boon. I want to use this with a Twisted Pear Buffalo DAC which uses the ESS Sabre DAC chip. Thus I would like suggestions for proper compnent values as well and I will include the data sheet for the DAC in this post as well. Thanks in advance and please be patient with me, I am new to this.

Now I just have to wait and see what Mr. Pass says about the Audio Nirvana Cast Super 12 drivers, enclosures, and FW amps to drive them.

CSS Sabre data sheet:

http://www.4shared.com/file/39002019...DataSheet.html
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Old 16th July 2008, 03:12 AM   #2
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Default Anyone?

I keep looking and still cannot find a simple D1 I/V in SE.
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Old 4th November 2008, 10:39 AM   #3
Yunick is offline Yunick  Sweden
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Khundude.

I see your e-mail is turned off, could you please e-mail me about the D1?

Best Regards
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Old 10th November 2008, 10:53 PM   #4
Variac is offline Variac  United States
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I'mm interested in the is scheme too!!
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Old 10th November 2008, 11:13 PM   #5
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Variac
I'mm interested in the is scheme too!!

which one exactly ?

I'm messing in too many threads in same time ......
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Old 11th November 2008, 12:41 AM   #6
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I'm interested also.
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Old 11th November 2008, 12:34 PM   #7
zei is offline zei  Sweden
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For what i understood the Sabre dac puts out about twice the juice compared to what the D1 I/V wants..

And that is the main problem to get the Sabre to work with the I/V....


/JZ
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Old 11th November 2008, 04:16 PM   #8
Yunick is offline Yunick  Sweden
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I asked Khundude to contact me so we could discuss how to modify the D1 to be suited for the D1 I/V. I have made a few tries over at the groupbuy thread but haven't made it work as intended yet.

I guess to make it work it would be simple to lower the gain of the D1 and maybe raise the bias (or the I/V resistor).

Also I think that if the buffalo sees a to high input impediance it will go in to voltage mode instead of current mode.. This may also be a problem. But I'm not shure, so if someone could fill in maybe
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Old 12th November 2008, 09:06 AM   #9
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I would guess so too. I would think a resistor arounf 47 ohm might work. I have finally ordered a Buffalo and will be able to play along soon.
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Old 12th November 2008, 10:36 AM   #10
Yunick is offline Yunick  Sweden
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The schematic can be found here

Khundude, what resistor did you refer to?
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