I connected the 0v to mains earth and it actually reduced the noise. The preamp sounds pretty good now. All I need now is a new amp and better speakers XD
Well done!
I wonder if I should start another project. If so, is there any DIY amplifier you recommend? how much harder such a project would be?
There's nothing I can specifically recommend, I'd start by looking for kit amplifiers. See what's available.
Here is an example of what I can get somewhat locally to me.
oh and I ordered those heatsinks you linked.
They'll probably help quite a bit, the surface area will be much larger and the temperature difference between the case and ambient should be a lot lower.
BTW there is still some static noise that starts only as soon as I place the needle on the spinning record (when the needle is in the air you can't hear it) so I guess it's coming from the record itself or the turntable rather than the phono preamp. What do you think?
I think that's part of the magic of vinyl.
