[sdiy] Signals leaking into the PSU?

[Tony Allgood]

 >  I must plug 100uF to 470uF caps between each rail and GND on every 
module as well as the bus board.

No, don't do that. 10uF is quite sufficient. Any more than that will 
create a current surge that can, and probably will, cause problems when 
you first switch on.

The key is low resistance from the power supply to the module. You don't 
need a fancy bus board. All you need are thick wires or even solid 
aluminium bars if your enclosure is going to be big. Use the thickest 
wire you can get without it being a nuisance. Star distribution, ie. 
each module connected back to the power supply using its own wiring, is 
probably best but this can be impractical so keep any shared wiring as 
thick as possible.

Tony

www.oakleysound.com