It’s nothing wrong with the N50,it’s the Lingo 2 that cause the hum.
I’m sorry, that’s not true. The N50 isn’t used with the Lingo 2. I think the N50 is a sensitive amp and my feeling is that it is picking up some tough electronics within the house. Other amps replacing the N50, with no other system changes otherwise, have zero hum in the phono section or otherwise.
Oh I see,anyway with Lingo the problem is that it don’t provide the earthing that the N50 need.