[morzh]

I've cleaned that stuff, the "rendered" wire cloth stuck to other wires and the chassis. The previous photo is at the Page 2.
   

After that I replaced a couple wires that seemed affected, and then put back some tubular caps.
Then I put together the filament dropper network, that is the cap 8.2uF and 16 Ohm resistor (for pilot lights), installed the power cord.
I am waiting for the 700 ohm resistor to come, as it needs to be in series with the choke, and then the last tubular cap, when I decide how I handle the battery circuit.