The datasheet I found online says the operating voltage is 100V, and 2.5 to 4.5mA. So I would start with the midpoint, 3.5mA
If your supply is 170V, and the tube is 100V, the resistor is easily calculated: R = (170-100)/(0.0035) = 20K I'm very suspicious about the 100V operating voltage; it seems too low for me. But I've never experimented with IN-8 tubes, so maybe it's correct. Most tubes I've used operate around 140V or higher. Best thing to do is measure the voltage across several IN-8 tubes when it's drawing 3.5mA, average the result, and recalculate the resistor value from that. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6cf239d4-0405-4e91-ba80-23b734eb4329n%40googlegroups.com.
