Assuming the 170VDC supply is not adjustable, you can easily put another DC supply in-series with it. There are a variety of small DCDC converters available with isolated outputs; just connect the (-) output of the converter to +170VDC, and power your nixies from the (+) output. A +24VDC output will get you above the 190V recommended per the datasheet excerpt.
If the +170 supply is a switchmode converter, you might be able to change the feedback resistor to get higher voltage, but you need to realize that will cause it to run hotter so it's risky. I usually run my tubes from +210VDC (boosting the line voltage) or +340VDC (diode-capacitor voltage doubler from AC line). I aslo use simple current regulators (NPN or NMOS on the cathode-side ; PMOS on the anode side) for most of my designs so the current is constant regardless of line voltage or tube condition. As long as the current is limited, running a nixie tube at a higher voltage is not harmful, though it wastes more energy. -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f080444f-5ebe-4c54-b6e6-98b15b2e2ae2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
