Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz - Page 12 - diyAudio
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Old 25th July 2014, 01:45 AM   #111
casshan is offline casshan  Hong Kong
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If I connect the raw output of this R2R, should I add the i/v stage?
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Old 25th July 2014, 02:08 AM   #112
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Quote:
Originally Posted by esgigt View Post
the micro-ohms advantage of silver... who's gonna notice...
Micro-ohm? The advantage of Silver is in phonon acoustics, lower resistance is only a side-effect.

See you
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Old 25th July 2014, 02:12 AM   #113
soekris is offline soekris  Denmark
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Quote:
Originally Posted by casshan View Post
If I connect the raw output of this R2R, should I add the i/v stage?
No, the R-2R DAC is voltage output, with the "raw" output at 1.4V RMS with a source impedance of 1.25 Kohm. The "raw" output can driver a power amplifier directly, although I recommend buffering.
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Old 25th July 2014, 02:23 AM   #114
casshan is offline casshan  Hong Kong
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Quote:
Originally Posted by soekris View Post
No, the R-2R DAC is voltage output, with the "raw" output at 1.4V RMS with a source impedance of 1.25 Kohm. The "raw" output can driver a power amplifier directly, although I recommend buffering.
I see, thanks! I want to add tube as buffer!
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Old 25th July 2014, 03:11 AM   #115
miklos is offline miklos  Hungary
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Please count me in for one 0.02% unit.
Thanks.
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Old 25th July 2014, 07:43 AM   #116
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Let's start a interest post, it will be easier to follow.

Please change the order of the names in priority if needed.

R-2R DAC with 0.02% resistors
Pinnocchio = 1
Royber = 1


R-2R DAC with 0.05% resistors




Thanks
Do
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Old 25th July 2014, 08:13 AM   #117
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In the first post: Soekris wanted to see if there was interest (I guess he's not disappointed)

Interest post with everyone re-adding his name will flood the thread and reduce visibility of discussion as it seems there is already be lots of interest... and orders.
A google doc or a separate thead for the group buy would reduce the noise in the discussion thread.

It's probably something that we should let Soekris decide.
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Old 25th July 2014, 10:12 AM   #118
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Please count me in for one 0.02% or 0.01% unit.
Thanks.
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Old 25th July 2014, 10:57 AM   #119
Eldam is offline Eldam  France
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Hi Soekris,

Count me in for 1 unit at 0.2% . I'm going to sell a Proac D15 Speaker at 60% of its price if any frenchies interrested, please let me know in PM.

Come back to the technical discussion, may you please accept the questions of a noob in technic :

What about EMC with big (no laser trimmed) smd résistors ? Also does some brand new very low regs where a longer wire connection could solve some problems about transformer radiation ? Like Acko fellows just maid (look at its web shop) with compact regs to allow to use farer radiating PS & putting it in a separeted box ?

About the caps and its size & temperature effect like the way they are maid : My underdtanding is the TotalDac use Z foil because non inductive wirewound for "transparency"... Did you check some famous brand like Rohpoint which smd resistor are SOTA ?

An another caps is the IPEDIAs glass : one of the best for temperature drift, better than NPO : size as small as 02xxx or more case size : woerth a try as I understand now than this unit can only be maid in factory !

Sorry if naives questions or inputs, I'm not a technician... my first motivation is a musical DAC... but if a DIP 24 bits deep resolution with a good filtering curves (with DSP...wow ! great !), no glitch can allow that with the possibility to ear the strings of a cello or the teeth of Jimmy Hendrix on him guitar... I'm definitly on the waiting list (hopping wife is not going to buy a discrete gun )

Last edited by Eldam; 25th July 2014 at 11:00 AM.
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Old 25th July 2014, 11:18 AM   #120
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One more question:

Is there any heat transfer from the LDO into the oscillator? (Temp drift)
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