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Hiss with AC-DC buck supply

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mauros

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I add that a linear power supply with a transformer I have already realized but, in addition to being a bit bulky, that would not be the real problem, it interferes with the inductance of the wah wah I have in the pedalboard. In this video
a mu-metal sheet solves the problem of noise, but it costs too much.
Cheers !
 
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