A simple solution then would be to use one resistor, or two resistors one in each branch, of the heater chain to maintain a centered reference compared to ground even during startup, and a relay shorting that/those resistors after some time - just like slow starters for toroidal transformers are designed. This could then be used with AC and DC heaters. A more complex design would use some extra components with a voltage regulator ramping up the voltage, but would only work on DC designs.
Using the same circuit combined with an inrush limiter on the primary side of the transformer supplying the heater voltage would also limit the startup voltage spikes, adding a MOV would protect against over voltages. Does this seem like a usable design? /Martin -- 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/97bb94e7-5dc0-43ab-94de-2204ac18ef51%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
