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"Reference" TDA1541A DAC with I2S-BUS architecture
"Reference" TDA1541A DAC with I2S-BUS architecture
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Old 26th February 2011, 12:40 PM   #501
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
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Originally Posted by LucasAdamson View Post
I recommend 0.6mm solid core silver wire for the power connections from the shunts. I also agree that connecting to the old TL431 holes is impractical and suggest scraping a nice centimetre line of trace and soldering a silver wire to it, for strength and electrical solidity.

Otherwise, I'm guessing Oliver has considered this mod, and if he decides to do this for himself, he will perhaps consider designing a new smaller board, or am I wrong Oliver?
The TL431 holes are 0.7mm diameter, so you could use a normal AWG24 / 0,511mm or AWG22 / 0.644mm solid core wire.
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Last edited by dvb projekt; 26th February 2011 at 12:44 PM.
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Old 26th February 2011, 12:47 PM   #502
LucasAdamson is offline LucasAdamson  United Kingdom
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Really Oliver? I remember them being too small.

Also, they're dangerously close together, so if you do go in there with the +v, best to take the earths to another point in the line, like the caps.
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Old 26th February 2011, 12:58 PM   #503
LucasAdamson is offline LucasAdamson  United Kingdom
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Also, I agree about positioning the shunt regs over the unused area of the DAC board, but that only works if using a single DAC board. For 2 or more parallel DACs like mine, cutting is perhaps the neatest option.
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Old 26th February 2011, 01:01 PM   #504
AlanElsdon is offline AlanElsdon  England
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Or perhaps a very tall case??
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Old 26th February 2011, 01:03 PM   #505
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
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Originally Posted by LucasAdamson View Post
Really Oliver? I remember them being too small.

Also, they're dangerously close together, so if you do go in there with the +v, best to take the earths to another point in the line, like the caps.
I have looked into my designing program and all TL431 holes should have 0,7mm diameter.

Anyway, the main thing for the overview was to mark the "injection" points.
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Old 26th February 2011, 01:05 PM   #506
LucasAdamson is offline LucasAdamson  United Kingdom
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Well not really Alan, because you need to get the shunt regs as close as possible to the DAC boards, ideally less than 5cm, and I can't see how you could manage this without cutting them.
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Old 26th February 2011, 01:06 PM   #507
LucasAdamson is offline LucasAdamson  United Kingdom
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While you're on that designing program of yours Oliver - go on! You know you want to!
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Old 26th February 2011, 01:08 PM   #508
Malka07 is offline Malka07  England
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Originally Posted by LucasAdamson View Post
Otherwise, I'm guessing Oliver has considered this mod, and if he decides to do this for himself, he will perhaps consider designing a new smaller board, or am I wrong Oliver?
I think when Oliver hears the difference, he will definitely be designing a new smaller board At least thats what im hoping!!
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Old 26th February 2011, 08:50 PM   #509
Jogi is offline Jogi  Germany
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I don't have Olivers Dac, but kicked out the TL431 on the DacEnd. It is clearly better without those little suckers, but not a world apart.
But if one wants to squeeze everything out, as we all do, it should be done.
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Old 27th February 2011, 12:27 AM   #510
LucasAdamson is offline LucasAdamson  United Kingdom
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Salas shunt regs and huge banks of Panasonic FDs for each channel is proper hi-fi, problem-addressed-engineering luxury, with low impedance, high ripple rejection, low ESR, clean DC. These shunt regs are absolute world class.

To then stick a little factory bastard on the end like the TL431 is perverse to me, unnecessary and not a real hi-fi solution. This was Thorsten L's advice if I remember right. In fact, it's not a solution to anything at all - there is no problem to solve!
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