Hello, I took two spare B7971 tubes out of the cabinet to see if they still worked. These tubes were always questionable, but I hoped I would get lucky. One is DOA - which I expected. The other tube is nice and bright, but the two vertical right-hand segments are shorted together. These are segments 2 and 3, which are pins 5 and 6, and they measure a dead short.
When it is displaying a zero or an 8, it looks almost normal, but those two segments *seem* a bit brighter to me. The 2, 6 and 3 are screwed up. The microprocessor in the two-digit clock is not happy, and the error is shared by the other tube if the same number is being displayed on both tubes - this is not something that I'm too concerned about since the error goes away when I swap in a good tube. Has anyone had any luck "whacking" the tubes in any particular direction to try to relieve this problem (by whacking, I mean slapping it into my palm)? Is there something else that I can try? Thanks. Jim -- 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 view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/03dbd726-23bb-43d3-a070-72430707800an%40googlegroups.com.
