Pictures of another TDA1543 coverter - diyAudio
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Old 30th October 2003, 10:48 AM   #1
Fabian is offline Fabian  Switzerland
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Default Pictures of another TDA1543 coverter

Hi,
thanks to all the available information on this forum, I was able to build a very nice TDA1543 DAC. Just have a look at what Iíve done:
http://www.geocities.com/tdac1543

Enjoy the picturesÖ.
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Old 30th October 2003, 11:35 AM   #2
Netlist is offline Netlist  Belgium
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I would love to but :
Sorry, this site is temporarily unavailable!

/Hugo
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Old 31st October 2003, 11:15 PM   #3
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Thumbs up stacky fingers

Great Job Fabian ! try to lower the voltage of your cooling fan ... only a very little air movement will be enough to COOL down your 1543 stack and so stabilizes voltage drifts .

Tip : 2.2 uF / 100Volt Audyn-cap KP-SN sounds great at the outputs . very nice balanced sound .

Happy Ears !

Also curious about 32 pcs. in parallel ? haha
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Old 1st November 2003, 06:45 AM   #4
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Default Re: Pictures of another TDA1543 coverter

Quote:
Originally posted by Fabian
Hi,
thanks to all the available information on this forum, I was able to build a very nice TDA1543 DAC. Just have a look at what Iíve done:
http://www.geocities.com/tdac1543

Enjoy the picturesÖ.
Hi Fabian,
Thanks for the kind words on your website. I even did not see your name!
What puzzles me is that I see no coils in the oscillator for the asynchronous reclocker. You did use a lower frequency?
Did you use the triple Darlington for the supply?
Kind of funny to see how ways diverge starting with the same DAC as I am currently using only one TDA1543 at +5V and no reclocker with I2S direct. As output cap I am using Audionote paper in oil, copper foil. Active conversion is done with OPA604.
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Old 1st November 2003, 07:12 AM   #5
dddac is online now dddac  Germany
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I have checked your website and you did nice work. What I like in particular is that you did listening tests bewteen the different versions. You liked the passive version best. I do as well !!

The are others here (Elso just replied before me) who are done other opinions..... but are not as clear as you are on what you exactly did.

Elso, could you enlighten us a bit on why you have been choosing for active I/V ??? What were the listening test conditions you had and what were the results ???

That would be really helpful !!

Doede
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Old 1st November 2003, 07:35 AM   #6
Lucas_G is offline Lucas_G  Netherlands
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Hi Fabian.

Splendid site of yours!

You wrote:

Quote:
This is about testing the benefits of a clean power supply (comparable to the supply that Audionote uses in their DACs - described here: Why 7805 is better than LM1085?) against a standard voltage regulator
I looked at the thread, but I am not sure what supply you mean...
Did you make any additional changes?

regards,

Lucas
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Old 1st November 2003, 06:57 PM   #7
Fabian is offline Fabian  Switzerland
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Thank you all for the kind replies.

@ Happy Ears
The fan is already running below 5V. The noise is not disturbing, but it would just be nice to have a dac without noise. And I surely will try other couppling caps.

@ Elso
Do you mean L1 and L3 on your circuit? The two beige parts are L1 and L3. R2 and C1 are placed underneath. I used a 100mhz quarz.

@ Lucas
I used the tripple Darlington supply with TL431 regulator. Here's the straight link:
http://www.diyaudio.com/forums/showt...2850#post92850
And the way I did it:
http://www.geocities.com/TDAC1543_6/

Fabian
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Old 2nd November 2003, 01:52 PM   #8
Lucas_G is offline Lucas_G  Netherlands
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Quote:
Originally posted by Fabian
@ Lucas
I used the tripple Darlington supply with TL431 regulator. Here's the straight link:
http://www.diyaudio.com/forums/showt...2850#post92850
And the way I did it:
http://www.geocities.com/TDAC1543_6/

Fabian
Thanks Fabian,

I will build this PSU also.

I have just received the Doede Douma PCB's, (http://www.dddac.de/ma_dac21.htm) and I want to use them in combination with your 3 PSU approach instead of battery-supply.

I have two questions though:

Should I leave out the TL 431 and the caps and resistors that were planned for the DDDac PCB, when I enter the 5 VDC and 8,5 VDC from your PSU, or would there be any benefit from extra regulation on the DDDAC PCB....?

What voltage-range would do for you PSU's?
You write 16 Volt on your scheme, but what is the minimum voltage for the transformers of the 5 V and 8,5 V supply?

Kindest regards,

Lucas.
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Old 2nd November 2003, 05:32 PM   #9
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Quote:
Originally posted by dddac

Elso, could you enlighten us a bit on why you have been choosing for active I/V ??? What were the listening test conditions you had and what were the results ???

That would be really helpful !!

Doede
Hi Doede,
I choose active conversion because it has more bass and more dynamic sound.
Listening test conditions???
I live a while with the mod and if I like it I keep it in.
If I don't like it it goes out.
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Old 3rd November 2003, 08:30 AM   #10
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Fabian,
Great job on that DAC.
Would you mind posting the actual schematics (you did a couple of versions) you used.
As I anderstand the PS is the one suggested by Elso ,from the link above.

Bartek
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