Maybe the high voltage supply is tapped out; just not enough current for all 4 tubes at once. Or the high voltage is a bit low and causing inconsistent ionization across tubes. It could also be a combination of both where the power supply voltage drops when the tubes are brought up, and the last tube to light has to ignite when the voltage is lowest.
On Mon, Apr 15, 2019, 9:37 PM Terry S <[email protected]> wrote: > I have an early Pete Hand 4LW clock using B7971s. Since day 1, tube # 2 > has been slightly slow to energize when the IR sensor wakes the clock up. > No big deal, I just noticed it, always tube # 2. Maybe a second late at the > most. Always figured it was the tube. > > Now as of this week, it's tube #3 !!!!! -- Tube #2 lights when it > should. WTF?? > > Pete -- I think you read the group -- any ideas? Just a weird curiosity, > nothing else. > > Terry > > -- > 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 email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/705408cb-21af-4f0a-9729-b8f659afc926%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/705408cb-21af-4f0a-9729-b8f659afc926%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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/CALcVLK%2BtGtW3xHrUAEEYfQ5dG1g_ktmp%2Bso%3DJvJ0bw7FGTBj7A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
