IV-22 VFD decimal place resistor

[John Snow]

I know IN-12B Nixies the decimal place need an additional resistor on the decimal place (usually ~22k, 1/4W from memory)

Do IV-22 VFDs require something similar for their decimal place - if so what's a good value compared to the other segments?

[gregebert]

You would tie the decimal point to a positive supply (like the other segments) thru a larger resistor. I would start with a resistor value 10x higher than the series resistor on the segments.

To prevent wearout, use the lowest current that gives acceptable illumination.

I didn't see anything in the IV-22 datasheet specific to the decimal-point current, but based on surface-area it should be proportionately lower than the segment current.