Re: My hifi is a disaster 1 problem at a time .
Posted: Mon Nov 22, 2021 3:09 pm
As I am busy doing nothing I’d thought I evaluate phono stage builds.
Firstly I looked at the innards of every commercial phono stage. I discounted any the rely on valves.
Then I set about seeing what secrets they gave away. The first thing I noticed is that an awful lot of them don’t advocate for the power supply. They use a tiny 12v plug in power supply.
Second thing was op amp versus discrete . I familiar with op amp I have a few here including the nva. Although the docs phono stage is unique in the op amp dept commercially .
So I’d try discrete. I looked around and settled on a Chinese clone naim stage line. It arrived fairly quickly . First thing to do was build a suitable power supply once I’d figured out how to run 2 positive rails instead of usual positive and negative.
Well this morning figured it all out wired the board to some power and fitted the RCA’s.
It’s good, very good. No direct comparisons yet but I could definetly live with it. And at moment it’s only using 160va transformer
You buy the board either mm or mc . It cost £50 populated , you have to supply the rest .
Firstly I looked at the innards of every commercial phono stage. I discounted any the rely on valves.
Then I set about seeing what secrets they gave away. The first thing I noticed is that an awful lot of them don’t advocate for the power supply. They use a tiny 12v plug in power supply.
Second thing was op amp versus discrete . I familiar with op amp I have a few here including the nva. Although the docs phono stage is unique in the op amp dept commercially .
So I’d try discrete. I looked around and settled on a Chinese clone naim stage line. It arrived fairly quickly . First thing to do was build a suitable power supply once I’d figured out how to run 2 positive rails instead of usual positive and negative.
Well this morning figured it all out wired the board to some power and fitted the RCA’s.
It’s good, very good. No direct comparisons yet but I could definetly live with it. And at moment it’s only using 160va transformer
You buy the board either mm or mc . It cost £50 populated , you have to supply the rest .