[sdiy] ROLAND PSA-120S 9VDC switching supply filtering components..
Roman Sowa
modular at go2.pl
Wed Jun 26 12:00:52 CEST 2024
The simple answer is - the biggest you can find that will fit in the
case you plan to put them in. Watch out for maximum working current and
DC resistance of the coils.
Roman
W dniu 2024-06-23 o 19:40, Jean-Pierre Desrochers via Synth-diy pisze:
> Is there anybody who made some researches on the type of inductors
>
> used in the new Roland 9VDC switching supplies ?
>
> The actual filtering circuit placed in series with the walwart supply
> block output is shown here
>
> Inductor L1 and the toroid T1 are of unknown values.
>
> I can measure them with my meters but they are mounted
>
> On solid ferrite cores. So making them more difficult to reproduce..
>
> I ask because I already have a bunch of surplus 9vdc at 1A SMPS blocks
>
> acquired in the past and would like to use them to supply
>
> some of my guitar pedals..
>
> Using them with their ‘raw’ unfiltered 9vdc output makes an annoying
>
> background noise in the audio signal path..
>
> The ‘possible’ values of these 2 components, or a similar schematic
>
> That would do the same job would be appreciated.
>
> Thanks.
>
>
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