Hi Giulio; I have a Marelli RV109, look here. I have yet to fix it.
http://videokarma.org/showthread.php...ighlight=RV109
I'm not a purist in the strict sense of the word, a restoration is always a compromise and if an intervention does not ruin the TV as changing a tube makes its use more secure is acceptable. It is better than change the circuit with an external transformer.
However, today I turned on the set for the first time after the failure of 6W4 for 5-7 minutes. The flyback was barely warm, nothing to worry about. The volume-contrast double potentiometer is damaged in the contrast section, I hope to save it. I cleaned some other potentiometers, tomorrow I connect a test pattern and cross my fingers.