Bob, I would guess the tantalum was up to the job. But only for the first 7 years of its life. We tend to keep using things way past the intended life. Maybe a case of just replacing the cap and cleaning up the stuff it sprayed out when they burn like that. I have fixed a lot of test equipment that is now on my bench thanks to those caps. Kind of a love hate affair. Regards Paul. WB8TSL
On Mon, Jun 13, 2016 at 8:13 PM, Bob Camp <kb...@n1k.org> wrote: > Hi > > In a run-away oven situation, the solder generally looks a lot worse and > the board is a lot closer to black than > chocolate brown. Best guess - that magic tantalum isn’t up to the job > they are trying to make it do. > > Bob > > > On Jun 13, 2016, at 6:32 PM, Skip Withrow <skip.with...@gmail.com> > wrote: > > > > Hello time-nuts, > > > > Well, broke out a PRS10 that I had put away for a project some time ago > and > > upon power up found that it had issues. Status indicated low lamp output > > and high lamp temperature. Duh! Upon removal of the lamp assembly it > > became abundantly clear that the magic smoke had gotten out. > > > > If I recall correctly, seems like there was another PRS10 with corrosion > > issues in the same area. My guess is that the heat does not help this > > situation. I suspect that I may have a full-on heater, which may have > > caused the tantalum cap (and possibly other) failures. > > > > Looks like this may be the weak spot in these oscillators. I'm very > > hopeful that a rebuild will bring it back to life. > > > > Thought you would enjoy the pictures though. Two are attached. > > > > Regards, > > Skip Withrow > > > > < > https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-2322-b > > > > Virus-free > > < > https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-2322-b > > > > <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > <prs10-1.jpg><prs10-2.jpg>_______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
