Re: Question about Oxley RFI suppression filters FLTM/P/5000

On Thu, 30 Jan 2025 14:53:25 +0100, Jean-Pierre Coulon
<coulon@cacas.pam.oca.eu> wrote:

I have put some on an amplifier box for my + and 5 V supplies. But yet a
ripple on either supply signically contaminates my outut signal.
>
AFAIK they represent a 6-uH series inductor and an about 5-nF parallel
capacitor. Is this inductor a coil or a toroid? If it is a coil it could
radiate a signficant magnetic field, contaminating my input signal.
>
Regards

EMI filters only filter high frequency stuff, AM band and up. If your
problem is AC-line frequency ripple or low frequency switcher noise, a
typical EMI filter won'[t help.

What does the contamination look/sound like?