[sdiy] connectors for power distribution

[Oakley Sound]

 > on each module a ferrite bead and something like a 22-47uF cap per 
power rail ...

Steady here. A lot of folk have had problems with big caps in the power 
rails. With largish systems the overall capacitance can get too big for 
the PSU to handle at initial power on. The current surge is sufficient 
to confuse the supplies current limiting.

I would recommend 4.7uF elec and 100nF poly at the point of entry. And 
then plenty of 100nF around the board too.

If your power supply is standard current limit and no foldback then you 
could load it up with as much capacitance as you wish. But those with 
foldback based designs [Condor, Power One, International Power et al.] 
may want to avoid excessive capacitance on the rails.

Tony

www.oakleysound.com