Hi NDK has multiple plants growing quartz around the world. They also have a number of competitors in that business. There are better places than NDK to buy high end bars.
Bob On Nov 24, 2013, at 7:00 PM, Bill Hawkins <[email protected]> wrote: > This is not as far from time-nutty things as it might appear. > > NDK makes precision crystal oscillators from those crystals. One of them > is an OCXO less than an inch (20 mm) square and half that high with > stability of 3x10E-9 over the range of -40 to 85 C. Annual drift is > typically 50x10E-9. The data sheet is at: > http://www.ndk.com/en/news/2013/1190702_1616.pdf > > The CSB released an impressive video of the incident last month. It is > in the final report at: > http://www.csb.gov/ndk-crystal-inc-explosion-with-offsite-fatality-/ > > The financial forecast for NDK shows 50 to 60% drop in profits for the > same sales in 2013. If that was also true in 2009, management was > motivated to maximize production with what they had. The original > consultant strongly recommended inspections for stress corrosion > cracking, but strong recommendations do not have financial penalties. It > has become obvious that money is the only thing that matters at the > management level these days. > > Oh, and don't bother trying to Google for "pure quartz crystals" to find > out whether the cost went up in 2010 after one of the two manufacturers > in the US was shut down. The people whose magical thinking extends to > crystals want purity, so all crystals are "pure." > > Help prevent incomplete knowledge. > > Bill Hawkins > > > -----Original Message----- > From: Robert Atkinson > Sent: Sunday, November 24, 2013 1:43 AM > > The US Chemical Safety Board have released their report into the 2009 > accident at NDK's synthetic crystal growing facility in Belvidere IL < > http://www.csb.gov/assets/1/19/CSB_CaseStudy_NDK_1107_500PM.pdf > It > also describes the process. > > Basically a 50ft autoclave failed, killing a member of the public at a > rest stop 650ft away. Looks like management decisions, probably based on > cost, overriding engineering advice even following an earlier minor > incident. The letters from a consulting engineer in the annex make > interesting reading. It illustrates the importance of those professional > engineers amongst us notifying and recording any safety issues we > discover. The facility is still shut down and the insurance company > won't settle as NDK were told of possible issues. > > Robert G8RPI. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
