Filtering switch mode power supply

[mpx]

Hello necks

Is it possible to filter a switch mode power supply output? One I have is causing havoc with pilot tones, ringing noise. God only knows what spurs it might be generating. Wondered if I can cure it with some filtering caps or something.

Cheers

[radium98]

try some ferrites or beads coils with decoup caps

[mpx]

Decoupling 0.1uF?

[radium98]

have to try many values 100 , 10 and 1 nf with some vk200 to remove thoses EMI

[mpx]

LC in series (psu-L-C-out)?
Which type of vk200? Or can I use a few turns through a regular ferrite tube?

I read it is quite difficult to clean up smpsu outputs completely

Thanks

[nrgkits.nz]

Use Meanwell power supplies, I’ve never had any problems with them.

[teckniqs]

Yeah I think it would be much easier to just replace the PSU. I've tried using microwave link box from laptop charger and it made a high pitched whining noise over the audio but with another laptop charger it was fine (all I had at the time).

[mpx]

I might replace it with a linear psu.

Do the Meanwell ones need anything on the output?

[LeeCavanagh]

Do the Meanwell ones need anything on the output?

No they dont, but they are also not the only brand that dont need extra filtering, you could find others cheaper, but mean well do have the best rep dont they.

[mpx]

Thanks