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Old 9th January 2004, 07:50 AM   #1
Klaus is offline Klaus  Germany
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Smile Another D1 clone with CCS

Hi,

my D1 stage clone launched… The sound is just incredible. Extreme stability, neutrality and silence in the sound – maybe caused by the consequent CCS using.

The schematic is a transfer from the P1.7 CCS into the pure D1 stage – thanks to the one and only! I have chosen the double JFET 2SK389 as converter. The sound is changing strongly with the bias current, find your own choice! Use for tests trimming resistors in the CCSs.

I am still feeding this stage with just 0,1mA from my TDA1547 using 6,5k work resistor R_L and 680pF Filter cap parallel. But soon a pack of PCM1704 will feed this converter sweetie pie…

Am I just to stupid or is there no way to upload attached files to the diyaudio server?! I have no web space installed so I can not refer to a personal www adress to lay down my pics somewhere. So please check the attached two links to see pics of the monster and the schematics…

http://www.audiomap.de/forum/index.p...id=15097&page=
http://www.audiomap.de/forum/index.p...id=15147&page=


Tweaky regards

Klaus
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Old 9th January 2004, 02:09 PM   #2
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I'll do it for you. You should save the drawing as a picture and attach it here.
Attached Images
File Type: jpg pa.jpg (79.1 KB, 760 views)
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Old 9th January 2004, 03:25 PM   #3
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I'm planning to try D1 stage with TDA1541A DAC.
Do you think using just the half of orignial (balanced) circuit without any changes to parts values would work ok?

Bartek
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Old 9th January 2004, 03:29 PM   #4
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It should work fine as it's not an X circuit.
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Old 9th January 2004, 11:38 PM   #5
Asen is offline Asen  Bulgaria
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zygibajt,

I was thinking of doing the same but using 2 TDA1541 the way D1 works. Do you have any special reasons to use just 1 DAC chip?

Regards
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Old 9th January 2004, 11:54 PM   #6
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I have: it's a stereo DAC.

How do you plan to seperate into L & R channels?
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Old 10th January 2004, 12:02 AM   #7
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I have one reason ,too.

I'm playing with CD player,not separate DAC.
By the way,I'm not quite sure I want to complicate things too much!

All best

Bartek
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Old 10th January 2004, 12:11 AM   #8
Asen is offline Asen  Bulgaria
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Peter,

I mean the second chip could be used to invert the phase. My idea was not splitting the channels. Do you think it's not possible with 1541?
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Old 10th January 2004, 12:16 AM   #9
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I believe you can invert the phase in I2S signal, so the second chip is not required. You can of course do it with another chip as well you can use separate chips for L and R channels (guido was working on it), but such setups might sound different than doing it with a single chip.
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Old 10th January 2004, 01:51 AM   #10
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If one wants to recreate the Pass D1 with the TDA1541A a second chip will be necessary.
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