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Old 8th November 2014, 11:57 AM   #1
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Default NOS DAC PSU witch chokes

I've built few tube amps, but low voltage, regulation, chips etc. is area i don't know very well.

I need a PSU for a minimalistic TDA1543 DAC. Somewhere i got motivation for a choke loaded DAC PSU and bought two 5H 75mA chokes. I modeled the situation in PSUD (see pic). I thought i could avoid the LMxx regulator (apparently not the best sounding devices ) and use less capacitance. But now i'm not sure that i'm going to risk running unregulated, frying TDAs along the mains fluctuation.

So i included a reg. I placed it between the chokes, the second one might help to filter LM noise. Does it make a sense? If not, what would be the right way incorporating these two chokes ?

Many thanks,
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File Type: jpg regulated.jpg (28.9 KB, 71 views)
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Old 12th November 2014, 07:05 AM   #2
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anyone, please ..?
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Old 12th November 2014, 07:09 AM   #3
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With 135R after the regulator, load regulation is going to be pretty poor. Put both chokes ahead of the reg and get another, much lower DCR choke to go after the LM reg.
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