When I had a tube that took 15ma to drive it, I discoved that I had the two 'anodes' wired backwards. The tube had a short life, in the order of weeks running full time.
-joe On Jan 23, 2017 1:41 PM, "TheJBW" <the...@gmail.com> wrote: > About 1.5years ago, I built this really nice stereo vu-meter using IN-13 > bargraph tubes. About two weeks ago, one of the tubes made a "tink" sound > and the current control went away -- the tube stayed ignited, but the "bar" > was stuck at the bottom. I noticed that the spacer at the far end of the > tube was also suddenly free. I figured this was an unlikely failure, so I > replaced the tube the spare stock. Unfortunately, one week later, the tube > on the other channel did the exact same thing! I've attached pictures of my > drive and power circuitry -- the signal conditioning circuitry is omitted, > but I think it unlikely to be relevant. I figure something must be wrong > with my circuit that is causing early death, but I'm not sure as to what. > Ideas anyone? > > -- > 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 neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit https://groups.google.com/d/ > msgid/neonixie-l/ffefa631-9ae9-4ee1-a55c-b648cf5c7012%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/ffefa631-9ae9-4ee1-a55c-b648cf5c7012%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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAE%2BVk6MsNfTfy6UPHqGzxjdkwZFAAvZ3HAX3RSJO3Q1eAVSUMQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
