"Reference" TDA1541A DAC with I2S-BUS architecture - Page 28 - diyAudio
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Old 14th November 2010, 09:12 PM   #271
Marra is offline Marra  United Kingdom
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Thanks Lucas; guess I'll stick with the 220's as used on Olivers pcb. I agree Salas knows what he's designing having built a DCB1 and been blown away by its performance.I just thought I'd use what I had to hand . I'll get some 220uf.
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Old 15th November 2010, 12:55 AM   #272
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Try Rubycon ZLH 220uF 35v

RUBYCON|35ZLH220M8X11.5|CAPACITOR, 220UF, 35V | Farnell United Kingdom

I haven't used them, but they have been highly recommended to me for this very application.
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Old 15th November 2010, 08:30 AM   #273
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I thought the latest and greatest was to leave out the polyprop caps at the output of the regs? (ref. BOM sheet in the beginning of this thread)
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Old 15th November 2010, 09:40 AM   #274
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I'm pretty sure it's application specific too. Indeed, for Oliver's boards, there is no polyprop at the output. Surely a polyprop at the output of the reg would remove DC, rendering the reg useless, no?
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Old 15th November 2010, 10:08 AM   #275
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a picture of your build (page 25?) shows that you do use 2 wimas in the regs though....
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Old 15th November 2010, 11:07 AM   #276
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It is not Wima, but another MKP - 1uF, on the CCS position, as per Salas instructions/suggestion, in the DCB1, not as you said at the output of the circuit (which would be truly wrong), and not in this DAC circuit either.

I have been a good boy with this DAC, done as I was told in the BOM, and used 220uF Nichicon Fine Gold They sound fine to me. I am not one for swapping quality components like this for other quality components unless there is a good reason - I would normally be more inclined to change values. There may be some advantage, however, to putting a much smaller value (like 1uF to 10uF) CCS (first) position film cap in place of the CCS 220uF electrolytic...just as Salas suggested with the DCB1, and you observed I have done.

The DAC is sounding very good (still only 1x DAC chip) - more photos soon when 2x DAC chips!
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Old 15th November 2010, 12:46 PM   #277
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Hi Oliver,

an information for the separate +5V shunt reg. for the Teralink X2. Do you use another Power supply board for the +5v shunt. reg. ?

Regards
Francesco.
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Old 15th November 2010, 04:06 PM   #278
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Quote:
Originally Posted by morpheous View Post
Hi Oliver,

an information for the separate +5V shunt reg. for the Teralink X2. Do you use another Power supply board for the +5v shunt. reg. ?

Regards
Francesco.
No.
The X2 +5V Reg. is connected additionally to the +15V line of the +/- PS-Module.
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Old 15th November 2010, 04:31 PM   #279
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Quote:
Originally Posted by LucasAdamson View Post
It is not Wima, but another MKP - 1uF, on the CCS position, as per Salas instructions/suggestion, in the DCB1, not as you said at the output of the circuit (which would be truly wrong), and not in this DAC circuit either.

I have been a good boy with this DAC, done as I was told in the BOM, and used 220uF Nichicon Fine Gold They sound fine to me. I am not one for swapping quality components like this for other quality components unless there is a good reason - I would normally be more inclined to change values. There may be some advantage, however, to putting a much smaller value (like 1uF to 10uF) CCS (first) position film cap in place of the CCS 220uF electrolytic...just as Salas suggested with the DCB1, and you observed I have done.

The DAC is sounding very good (still only 1x DAC chip) - more photos soon when 2x DAC chips!
I see that clarifies. Should have better paid attention what I was looking at (DCB1, not DAC).

By the way, EC-designs has identified that his ultra-simple output stage is not optimal either. He is now using a bit more complex topology.
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Old 16th November 2010, 06:37 AM   #280
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Quote:
Originally Posted by studiostevus View Post
By the way, EC-designs has identified that his ultra-simple output stage is not optimal either. He is now using a bit more complex topology.
That confirmed my sound experiences with his circuit from post #122
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