On Saturday, March 28, 2015 at 7:55:48 AM UTC-4, Kiran Otter wrote: > > I've had a Tubehobby clock for several years, the NCV2.1 with the IN-18 > tubes. In the past Jonas has helped, and I even shipped him the main board > for him to repair, but he hasn't responded to my last request for help, so > I thought I would ask here. > > Recently, I started to notice that other digits in the tubes were > partially lighting up, and eventually the fuse blew. My assumption was > that the K155ID1 drivers had started to go, so I ordered six of them off > eBay, and tried replacing them.. which isn't hard, everything is socketed. > Well it didn't help, so I contacted Jonas. Jonas suggested replacing C6, > which I did and it appeared to fix the problem. >
Yes, that kit tends to "eat" the HV filter cap. I've replaced it in multiple clocks multiple times. Eventually I suppose I'll just figure out how to get a Tayloredge HVPS module in there, and swap the supplies the next time the cap fails in each. Jonas did have a bad batch of K155's way-back-when, which tended to have leakage between their output pins, but I'm pretty sure that would have manifested by now. It is possible your replacements have this or some other problem. The IN-3 tubes used in the colons seem to be generally flakey. I've gone through a good chunk of a box of 100 to find "good" ones, which start acting up soon after being installed. I found some elongated NE-2 type tubes at Mendelson's years ago. They must have been very expensive as they were individually wrapped in foam with an inspection report and then packaged 1-per-box in cardboard boxes. Once I installed those, the colon indicators never gave me any more trouble. -- 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/54a9ef2a-7475-456e-9ac0-996743cf166c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
