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Old 19th October 2003, 08:52 AM   #1
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Default TDA1543 from dddac.de/ma_dac21.htm

Hi

I am looking for a project with TDA1543.
A new project from Doede Douma, it seems good.
Looking foward any comments on this
Thanks

Ben
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Old 19th October 2003, 10:59 AM   #2
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As soon as I get my TDA chips I'll let you know...

Cheers

Andrea
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Old 20th October 2003, 06:58 AM   #3
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I have built a simpler version as the one you can see om http://www.fedde.tk, with BlackGates. It sounds absolutely gorgeous!! So if Doedes dac is even better, it is absolutely worthwhile to have a try!
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Old 20th October 2003, 12:18 PM   #4
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I have built a preliminary one based on fedde site. It sound good
But I would like to know any further improvement can be made.
Thanks
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Old 20th October 2003, 08:52 PM   #5
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Default Re: TDA1543 from dddac.de/ma_dac21.htm

Quote:
Originally posted by bsyyu
Hi

I am looking for a project with TDA1543.
A new project from Doede Douma, it seems good.
Looking foward any comments on this
Thanks

Ben





Hi Ben ! and others of course ,

I'v completed Doede's 1543 NONO-dac last weekend .
It's been a real pain in the *** to create adequate cooling for this amount of paralleled 1543's , especialy at the rated voltage and bias requirements ... but it's worth a full 100 percent !

I build the initial testcase PCB inside my Marantz CD63 player . took the I2S format straight from the SAA7345 decoder pinning , so shortest path I guess .
Also build a separate power supply inside the Marantz case , one section with 7805 regulator to feed the cooling fan , second section to feed the 1543 Tower ( 8 pieces in my case too ! )

Of course I will turn over to battery feed in time .

Let me be clear : This Dac completely smokes all digital predecessors I'v build before ...
The soundstage increases with LOT of space , dynamics .. wow .
Voices become so realistic .. everything play's within my livingroom right now .

Please don't hesitate , build it and see how pleasant live can get .

Yours,
Paul
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Old 21st October 2003, 12:04 PM   #6
deandob is offline deandob  Australia
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Default Photos

Paul,

Do you have photos of your CD63 mod, especially the I2S tap and the cooling fan arrangement?

Regards,
Dean
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Old 21st October 2003, 02:22 PM   #7
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Default Re: Photos

Quote:
Originally posted by deandob
Paul,

Do you have photos of your CD63 mod, especially the I2S tap and the cooling fan arrangement?

Regards,
Dean





Hi Dean , attached URL's will show you the I2S format connection and the voltage regulator from where you can pick up the 5 volt to feed the cooling fan .
In this case you don't need to unscrew the CD63 Main PCB board , easy enough !!
I use a 12 volt / 100mA cooling fan , about 2 square inch ..... at 5 volt it provides adequate cooling performance .

Have fun , let me know if you need more information .

Yours,
Paul

http://members.lycos.nl/gloeidraad/h...SIP0000001.jpg
http://members.lycos.nl/gloeidraad/h...SIP0000002.jpg
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Old 21st October 2003, 02:39 PM   #8
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Thumbs up NONO dac build in Marantz CD72MKII

Hi Guys !

Today I also completed my CD72MKII NONOmods .. superb sound too !!
even a fraction better then with my CD63 player . better transport = better sound !

Note that you need best available coupling capacitors !! perhaps a matter of taste ... well the Mundorf Caps I'v used are perfect .. also Audyn-cap KP-SN are good IMO .

Yours,
Paul
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Old 21st October 2003, 07:59 PM   #9
rbroer is offline rbroer  Netherlands
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Top:
Adjusted Rref with scope so output signal is just in the middle of the upper and lower clipping point

Bottom:
Adjusted Rref with FFT analyzer so 2 kHz harmonic is lowest.
Note the increase of 3 kHz harmonic and how the higher harmonic change.

Indeed as Doede observed, there is a small window where 2 kHz contents drops very steep. But you also change the spectrum.

Just for your info.
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Old 21st October 2003, 08:00 PM   #10
rbroer is offline rbroer  Netherlands
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2nd
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