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RE: Dacs powered by batteries - any successful story ?

Posted by beppe61 (A) on June 14, 2015 at 01:03:03

In Reply to: RE: Dacs powered by batteries - any successful story ? posted by Thorsten on June 13, 2015 at 21:25:04:

Hi and thanks a lot Mr Thorsten for the always very valuable and precious advice.
Lately i have become very interested in power supply noise.
I was even thinking to buy an instrument just to see this bloody noise out of ps.
When the noise is low even measure it becomes a very challenging task.
And devices like the Audio Precision ones (wonderful indeed !) are completely out of my reach.
One issue that matters a lot to me is isolation from mains.
Mains voltage is usually very corrupted.
For instance i do not understand why for low V and low V almost all designers use toroidals. Toroidals are quite "famous" for letting all the noise through without suppressing it.
Instead R-core or EI types having split bobbins are so much better.
I guess a very good linear ps starts with the selection of a very good transformer. This is the first choice to make.
Then after isolating from the outside noise another goal is try not to generate other noise for instance in the diodes bridge.
I think that i will just try Li Ion batteries for curiosity.
But i will end with a decent regulator. There is already one on the pcb, a lt1963.
I am just looking for decent results.
My system is quite low end ...
Thanks a lot again for the very helpful advice.
Have a nice day !


Kind regards,
bg

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