I've certainly had a bad K155ID1 or two...but I've also seen a failed MPSA42 do the same thing in a clock, but only on one tube...any chance you have a transistor failure somewhere?
On Tue, Aug 5, 2014 at 7:24 PM, Terry Kennedy <[email protected]> wrote: > On Monday, August 4, 2014 10:38:39 PM UTC-4, StoopKid wrote: >> >> I can't find anything on google about this. I don't really know what I >> could be doing to cause this. I am pretty sure that it is an issue with the >> chips because I have always had it happen occasionally even when I was just >> breadboarding and stuff. And the problem would always follow the particular >> chip, if I moved it the problem would follow. If I replaced it, it would go >> away for some time. >> > > There have been bad batches of those drivers in the past. Jonas from > TubeHobby had to replace a large number of them in his NCV2.1 clocks > because they had the "0" and "2" digits ghosting. So it may not be your > design, it could actually be a problem with the 155's. Are all the ones you > tried from similar date codes and in the same packaging type (plastic / > ceramic)? > > -- > 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/c802abf6-532e-47fa-a65d-13add2ea5543%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/c802abf6-532e-47fa-a65d-13add2ea5543%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/CAOX%2BRHKRX-J516ob4DjixfmS281BEfbX_uy3NGYkmwqAqjEohQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
