My final CD-player

193.41.233.240

Posted by Danny T on September 3, 2003 at 02:57:01

Finally my DIY CD-player is finished and it's playing superb, never thought that a CD could sound so good.

The CD-player uses a CD-Pro2 transport which is directly(i2s) connected to two TDA1541a converters(zero-oversampling) in parallel, the amplification stage is done with 5842 tubes.
The CD player is based on http://www.diyparadiso.com/dac1.htm

On the picture you see:
bottom left: power supply for the display and the CD-Pro2, 2x v5dc, 9vdc, +20vdc, -21.5vac
bottom middle: CD-Pro2 transport, has also it's own tda1305 DAC converter but doesn't sound as good as the TDA1541 + 8542.
middle: power supply for the two TDA1541a, all regulated with lt1085, 2x v5dc, 2x -v5dc, 2x -v15dc
top middle: power supply for the 5842 tubes, -6.3vdc, -6vdc(relays), +240vdc (hawksford cascode CCS with BF872)
right: the DAC with 5842 tubes, each TDA1541a has its own capacitors and power supplies(adjusted with tl431).

The I/V conversion after the TDA1541a is done with a 33ohm Dale NS-2B wirewound resistor, these Dale NS-2B are among the best resistors for audio.
After the I/V conversion there's a passive 3rd order filter to get rid of the high frequency garbage.
This filter will soon be removed because Benny and Stephane from diyparadiso have found a solution for this problem that every zero-oversampling DAC has.
The 5842 tubes get there current through a hawksford cascode CCS based on BF872, the tubes have a negative fixed bias.

As coupling caps I've used the Mundorf silver PIO, see this thread:
http://www.audioasylum.com/forums/tubediy/messages/36312.html

Another picture of the CD-player:
http://home.tiscali.be/be000278/Tube/DAC.jpg

Regards,

Danny.

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Topic - My final CD-player - Danny T 02:57:01 09/03/03 (24)

Re: My final CD-player/DAC trouble! - danzan 04:20:46 09/04/03 (2)

Re: My final CD-player/DAC trouble! - Danny T 16:07:48 09/04/03 (1)

Re: My final CD-player/DAC trouble! - danzan 23:10:08 09/04/03 (0)

Hawksford current source? - Allen Wright 01:46:19 09/04/03 (4)

Re: Hawksford current source? - Danny T 15:29:27 09/04/03 (3)

Thanks, Danny! - Allen Wright 02:20:21 09/05/03 (2)

Another link - Gary P 05:09:44 09/05/03 (1)

Gary can't find rev 4 and 5 on your pages.. nt - Bas Horneman 06:48:07 09/05/03 (0)

Re: My final CD-player - griboon 17:17:01 09/03/03 (1)

More info about the project - Danny T 02:41:56 09/04/03 (0)

try this - nl 12:45:59 09/03/03 (3)

Re: try this - Danny T 15:26:33 09/03/03 (2)

smaller r values - nl 17:36:47 09/03/03 (1)

Re: smaller r values - Danny T 16:21:37 09/04/03 (0)

What do you use for clamping the CDs? - Carlos 07:47:37 09/03/03 (1)

Re: What do you use for clamping the CDs? - Danny T 09:20:53 09/03/03 (0)

Re: My final CD-player - keto 06:23:57 09/03/03 (2)

Only so much resolution - Jeffm 12:11:54 09/04/03 (1)

yes, SACD.... - keto 14:19:23 09/04/03 (0)

Re: My final CD-player - Derick 04:32:12 09/03/03 (2)

Re: My final CD-player - Danny T 09:13:00 09/03/03 (1)

Re: Thanks Danny! (nt) - Derick 14:56:14 09/03/03 (0)

Wow..excellent Danny..I'm jealous.. - Bas Horneman 03:18:00 09/03/03 (1)

That's no problem, thanks. (nt) - Danny T 09:07:56 09/03/03 (0)

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