Thanks Tom, today I have checked several voltages.
On the Horizontal Output tube, my schematic report this value
Cathode: 3.5V
G1: -20V
G2: 130V
And on my set I have
Cathode: 5,43V
G1: -17
G2: 165
Agreed with the law of ohm, and my 57ohm cathode resistor, the cathode current is 95mA. Good.
The strange situation is on the damper circuit. On the schematic I have 560V on cathode and 320 on anode. But I have over 1000V on cathode and on the anode... I burned my multimeter
