Check the cathodes, they are probably low. Typical K volts on
a console is 125-175 ish depending on design & CRT.
They are run off a 200V supply from a FBT winding. Typ a fusable
resistor, rectifier then a 5-10 mfd filter. Sometimes the supply is
stacked on the main 130V B+ so the filter goes there instead of GND.
To find the 200V each jug has a hefty driver transistor. The collector
goes through a 2-3 watt resistor 18 K ohm plus. That is hooked to the
200V. Look at almost any SS color schematic & it will be near the same set up.
As for the G-2 the low end sounds to high. Typ 800V boost on the high
end & the low end 200-300 V. The wiper goes to G-2.
BTW if you can post some nudies for the group of the chassis.
73 Zeno
LFOD !