Hello everyone, hope someone can offer advice.
I have built a hifi preamp, ESP P97 to be exact and very good it is too. The preamp itself runs from a dual linear power supply and there are no issues.
However, I have also placed a SMPS into the case to power a 5v LED strip and although it works (LED's power on), I have a massive, and I mean massive, buzz through the preamp.
The incoming mains is via chassis IEC which then goes to a switch, then a terminal block where I have connected both the linear power supply for the pre amp and also the SMPS for the LED strip together.
Maybe something simple I am doing wrong, maybe you cannot do this, but the way I have wired them together is not any different than having them both connected, albeit individually, into a mains extension block.
Any ideas would be greatly appreciated. A couple of photos of the preamp plus a sketch of the mains wiring.
Regards
Adam.
I have built a hifi preamp, ESP P97 to be exact and very good it is too. The preamp itself runs from a dual linear power supply and there are no issues.
However, I have also placed a SMPS into the case to power a 5v LED strip and although it works (LED's power on), I have a massive, and I mean massive, buzz through the preamp.
The incoming mains is via chassis IEC which then goes to a switch, then a terminal block where I have connected both the linear power supply for the pre amp and also the SMPS for the LED strip together.
Maybe something simple I am doing wrong, maybe you cannot do this, but the way I have wired them together is not any different than having them both connected, albeit individually, into a mains extension block.
Any ideas would be greatly appreciated. A couple of photos of the preamp plus a sketch of the mains wiring.
Regards
Adam.
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