[sdiy] DC wallwart +/- on-board V Reg ?

[Paul Perry]

Here's the Word of God (the late Jim Williams)

http://cds.linear.com/docs/en/application-note/an101f.pdf
----- Original Message ----- 
From: "Andre Majorel" 
>About 10 years ago, I read something to the effect that getting
>rid of the noise of a switch-mode power supply by following it
>with a linear voltage regulator does not work. Not as well as
>people think it should, anyway.

>Sorry for making unsubstantiated claims but I cannot find the
>source now. I think it may have been some app note mentioned
>here. Anyone remember which ?