Hello everyone.
I'm working on my first class DYI hifi amp.
A "simple" assembly of pre-assembled boards ...let's say a school prototype with no pretensions other than to sound decent. The result isn't top, but I learned many lessons that I hope to apply at best way in V2.
However, there is a very annoying problem for which I would like the valuable opinion: the PSU, I know it is not the best, has two 12v auxiliary outputs. I needed one to power the LEDs on the front panel. Well, if I connect even a single LED to one of the outputs, a constant buzz is generated regardless of the volume setting. With the 12v contacts empty, nothing. I also noticed that if I touch one of the two contacts (under load) with a multimeter tip, the buzz fades out by half or so. The case is made out of wood with no grounding.
Can you help me remove the problem?
I'm working on my first class DYI hifi amp.
A "simple" assembly of pre-assembled boards ...let's say a school prototype with no pretensions other than to sound decent. The result isn't top, but I learned many lessons that I hope to apply at best way in V2.
However, there is a very annoying problem for which I would like the valuable opinion: the PSU, I know it is not the best, has two 12v auxiliary outputs. I needed one to power the LEDs on the front panel. Well, if I connect even a single LED to one of the outputs, a constant buzz is generated regardless of the volume setting. With the 12v contacts empty, nothing. I also noticed that if I touch one of the two contacts (under load) with a multimeter tip, the buzz fades out by half or so. The case is made out of wood with no grounding.
Can you help me remove the problem?
