[morzh]

Now there is one last problem: there's 60HZ (I think) buzz that is pronounced when no station is coming in.
It is there even when the volume is at the minimum.

I thought it would become a bit better if I no longer use the isolation transformer and use the outlet direct. I was right, it is a bit better but still present and noticeable. Reversing the plug helps .. not.

the schematic contains the filter cap, from each line to the chassis. I observed that and used the same 0.01uF having replaced them with Y-capacitors.

I will look at it a bit more. Want to see if the Grounding the chassis helps.

Oh, the Foreign broadcast works fairly well now. A good pentagrid did it!