[Raleigh]

My 42-255 with 8 tubes pulled about 500 mA at 123 VAC. I used 15 ohms to drop it to 115 VAC.

With 9 tubes and 122 VAC, 10 ohms might be about right for the 41-285.

I put the resistor in the hot side of the line between the fuse and the switch. In the schematic the switch is after the line filters capacitors. I moved the switch to before the line filters. So the hot side of the line now goes first to fuse, then resistor, then switch, then line cap, then transformer.