[sdiy] cheap BOSS dc adapter replacement?/switching noise PROBLEM?

[Neil Johnson]

Hi,

cheater cheater wrote: 
> See if a DC filter (big cap + small cap) just before the DC input to
> your problematic box "C" fixes it. I'm fairly confident it has an
> unfiltered input.

A capacitor on its own is not a filter.  You need some resistance or inductance as well.  I'd suggest either a smallish resistor or a ferrite bead before the capacitor.

Neil
--
http://www.njohnson.co.uk