You have to make a decision based on how this transformer tests-out. Option 1: Step-up transformer to rectifier+capacitor. This is by far the simplest solution if the turns-ratio is in the right ballpark, and it doesn't overheat under load when running on 60Hz. As mentioned above, try applying a small AC-voltage to the primary winding. You can identify the primary by measuring the resistance with an ohmmeter; primary resistance for a step-up transformer will be lower. Now measure volts-in and volts-out to get the ratio. Once you have that, you need to select from your available AC sources, such as 6.3V filament. The optimum voltage for a NIMO tube from the datasheet is 1850V, but I would target a higher voltage to allow for losses; you can always add an anode resistor if necessary.
Once you have the target voltage correct, run it under load (180uA for 6 NIMOs). A 10Meg resistor is about right for that. Let it run for several days to make sure it doesn't overheat, etc. Option 2: If the voltage is not high enough, you can use a voltage doubler, tripler, etc. But you wont know until you have the turns ratio. Option 3: Flyback converter. This uses pulsed DC, and will require voltage feedback to prevent the output from going too high. The output voltage of a flyback converter is load-dependent. Let's wait until you have more info about the turns ratio before going this route. --------------------------------------------------------------------------------------------------------------------------------------- Generally, I dont build anything unless I can simulate it thoroughly in SPICE and Verilog. But this is a chance to make a simple HV supply with minimal time/money so go for it. The worst thing that can happen is you will burn-up a $2 transformer, or a get nasty shock. -- 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/eeaec3fd-9270-4bd0-b5ea-389b36554149%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
