@jbau : There seems to be some confusion about why the chokes aren't doing what they are supposed to be doing. Did you use chokes with appropriate current ratings? Once the core goes into saturation you are left with a few turns of wire.
Maybe this already came up, sorry if I missed it.
@auriga2001in 1. It doesn't filter common-mode noise. 2. The output impedance is high and non-linear. It doesn't really address the problems an smps introduces. A 6mH choke in series with the +V rail? I wouldn't use it.
