To ground.Resistance grid to what? The switch is a on-on switch with the ground in middle terminal.
There should only be a couple of volts across the cathode resistor of the 6SJ7.
The switch on the 6SJ7, does it switch back and forth across the width of the chassis or lengthwise? I see the two blue wires, one going to the 470k resistor (which I am guessing is the grid leak resistor) and the 2.2k resistor. I can not see the switch clearly. Does it have three terminals or six terminals? The blue wires are suppose to be on either side of the center terminal that goes to ground.