Well, after the Owston back in 2021 I had another hankering to build something and so I went ahead and bought the phono PCB from Mr Self. I built it back at the start of 2022 I think and then proceeded to ignore it.
It had some initial noise issues with MC input and so what with other projects on the go it got forgotten about. (Vinyl doesn't figure heavily in my normal listening!)
Since I had some time I've dragged it back out and wanted to take a look and see if I could solve the noise issues.
Attached are a couple of photos of the build. The psu is very simple (probably way too simple!) and connected to the phono amp via an un-shielded umbilical.
I have two problems with noise, one is a very low level 50/100Hz which I guess I need to sort with either better smoothing or perhaps identifying hum loops? The other issue is a slight "rustling" which I can totally stop by putting both hands around the umbilical. However, trying a makeshift screen and grounding it does not have the same effect.
It would be nice to get this completely functional as it does sound really very nice. Any advice would be gratefully received! The power supply and the implementation are the weak links here of course (since I did them!) as I'm sure the amp itself is very well designed. However, I can always upgrade the psu.
Cheers,
Tony
