The heater pins of the 35w4 are pins 3 and 4. The 35w4 also has a tap at pin 6. The dial light sits between 4 and 6. I want to remove the light because they tend to go out and stress the tube. I have a different light connected elsewhere.
I dont want to leave the dial light pins empty, as that may also stress the tube.
A shunt resistor may fix this, say 47 ohm. 1 or 2 watt..
Got it—pins 3/4 for heater, 6 as tap for the light between 4/6. Shunting 47Ω 1-2W across 4/6 mimics the bulb's ~40-50Ω drop at 150mA, keeping current balanced without stressing the 35W4. It'll warm up (check your PT can handle extra ~0.9W), but beats an open circuit. Solid plan.
Interesting. Mmy PT is a Triad n68-x rated for 50 VA. The heeater string takes 150ma at 135v AC and the rest of the device uses less than 100mA running on the b+ from the 35w4.
