On Thursday, September 1, 2016 at 1:51:45 PM UTC-4, MichaelB wrote: > > Had another TubeHobby clock start blowing fuses the other day and I know > others on this forum have had similar issues. I have 4 of these muxed > clocks and 2 that drive IN-18’s, the others use smaller tubes like the > Z566M and the Z574M and have been fine. However, I have had issues now with > both of the IN-18 clocks where the 1st blew C6 (see attached PS > schematic) and now this one has eaten (shorted, or darn near, measures > .3ohms) the 270uf inductor. Replaced it and the clock has run fine now for > 3 days, so its fixed for now. Not sure what it is about this clock's power > supply driving IN-18’s and so wondered if others have noticed this problem > and what a long term cure might be? Included the power supply schematic for > review. >
That clock is very hard on the HV cap. I've had problems in the HV section take out that cap (and usually the fuse) and sometimes even the wall AC adapter. It happens infrequently enough (in a population of 4 clocks) that I haven't bothered seeing how hard it would be to ditch the built-in HV and use something like a tayloredge packaged supply. -- 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/928b4354-1ed2-486f-825a-d088922b2150%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
