> What is off camera is a regulated lab power supply set at 180 Volts. So, a DC supply, no multiplexing.
> As you see, one of the other tubes is lit, too! > > So somehow the anode voltage is capacitively coupling inside the tubes to a > nearby cathode and trough that, powering another tube. If it's a DC supply with no multiplexing, there's no AC component, and therefore no capacitive coupling. What you're seeing is leakage, AKA resistive coupling. There's probably some flux residue, dust, fingerprints, or similar on the board, providing a high resistance leakage path, which is enough to get a partial glow like that. - John -- 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/258279AC-5824-4C8F-AACF-6F7689ABDC3A%40mac.com. For more options, visit https://groups.google.com/d/optout.
