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Old 26th October 2010, 10:08 PM   #1
nhuwar is offline nhuwar  United States
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Default DAC kit question

Hi all,


I was curious if anyone knows anything about this dac? I got a pcb but need to find a decent bill of materials.

PCB TDA1541 / TDA1541A ( CS8412 / CS8414 + SAA7220) - eBay (item 280328167007 end time Nov-19-10 06:45:12 PST)


Thanks,
Nick
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Old 31st October 2010, 02:52 AM   #2
gabdx is offline gabdx  Canada
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HI,

I have 2 of these and one is still not working after more than a year , but the seller is helpfull.

If I were you I would look at digikey, also some ebay sellers have nice custom clocks you can implement to the dac.

I currently have 4 boards of experimental i/v stages because the weak point of this dac is the opamp output stage which is the same design as 90's cd players , and it is not a sastifying one ...
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Old 31st October 2010, 04:48 PM   #3
nhuwar is offline nhuwar  United States
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Thanks for the info, I will remember that. I thought the opamp was going to be a problem. I want to try and use a lme49990 from national.


Nick
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Old 1st November 2010, 01:24 AM   #4
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i got 2 of these too only one is been build yet.
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Old 1st November 2010, 02:32 AM   #5
gabdx is offline gabdx  Canada
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Is it working ?, I noticed substantially more bass on the tda IC from the kit, the one that looks fake, the R1 that I bought on eBay has lot less bass but is more detailed.
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File Type: jpg tdadac1.jpg (125.9 KB, 302 views)
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Old 1st November 2010, 09:58 PM   #6
nhuwar is offline nhuwar  United States
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Whats with the clock on it?



Nick
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Old 2nd November 2010, 12:30 AM   #7
gabdx is offline gabdx  Canada
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Low Jitter clock to upgrade Cd player Usb to spdif dac - eBay (item 220476467930 end time Nov-29-10 06:51:53 PST)

I put a good quality oscillator from the same vendor. ,

Also for your information I am very proud of the regulators (ska miniregs + dexa ) and the custom input transformer. I messed the job with the two regulators for the opamps so I temporally use the LM317 ,anyways this opamp stage is soon bypassed with discrete transistors. You noticed the stack of capacitors (4) in green, its because I didnt had the right value of .22,
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Old 2nd November 2010, 01:54 AM   #8
nhuwar is offline nhuwar  United States
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Quote:
Originally Posted by gabdx View Post
Low Jitter clock to upgrade Cd player Usb to spdif dac - eBay (item 220476467930 end time Nov-29-10 06:51:53 PST)

I put a good quality oscillator from the same vendor. ,

Also for your information I am very proud of the regulators (ska miniregs + dexa ) and the custom input transformer. I messed the job with the two regulators for the opamps so I temporally use the LM317 ,anyways this opamp stage is soon bypassed with discrete transistors. You noticed the stack of capacitors (4) in green, its because I didnt had the right value of .22,
Got it.


Nick
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Old 11th March 2012, 11:05 PM   #9
gabdx is offline gabdx  Canada
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Any news for you?

On my side I completed the akm4393 , akm4396 and pcm56p-k dacs!!!
I have 3 tda1541 dac full of issues. But now there is no going back!!!
All of them use tube output and the akm4396 is the winner for high frequency purity, pcm56p-k wins for liveliness and true timbre.
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