AC SMPSU filter in use with linear PSU - diyAudio
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Old 17th February 2003, 08:31 PM   #1
nikosgr is offline nikosgr  Greece
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Default AC SMPSU filter in use with linear PSU

Hi all!
I have an idea!
i dont know if it is right.can i use this ac filter with my linear psu
it came from a big SMPSU(server type).
I beleive it can hold many amps.If its ok to use it,then it will has
negative or positive effects on the linear psu of the amp.

regards
nikos
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Old 25th February 2003, 09:01 AM   #2
nikosgr is offline nikosgr  Greece
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Is there anybody out there?!!!!!!!!!!!!!!!!!!!!

nikos
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Old 25th February 2003, 11:11 AM   #3
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This is a good idea -- i.e using a power line filter in the same position for a linear supply. It will basically kill noise being fed back into the power grid (and to other components) which is the intended function + reduce noise from the power grid as well.

I note from the picture that there is a heatsink on the right. It would be instructive to find out what type of component is there since you should typically only put passives in such a device. If there are active devices, you may have a PFC circuit or something like that which you don't want for sure!

Typically, common mode filters have a very positive effect. Whether series mode filters have good or bad effect is probably open to interpretation. I use som bad Corcom filters that help the sound a lot, and they have both modes of attenuation.

Petter
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Old 25th February 2003, 12:25 PM   #4
nikosgr is offline nikosgr  Greece
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Peter, thanks for your reply,
i will use it and see what happens!!!!!!!!!!

regarding your observation about the device under the heatsink
on the right of the pcb, you are 100% right.
It is a bridge rectifier it takes 220v ac and reverce it to dc voltage(380dc).
I have to pull it out of there and use the rest of the filter.!!


Waiting for any other suggestions you may have

regards
Nikos
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